cam lobe profile catalog

Transcription

CAM LOBE PROFILE
CATALOG
AN EXPANDED LISTING OF ALL CRANE CAMS LOBE PROFILES
FOR PROFESSIONAL RACING ENGINE BUILDERS
CAM LOBE PROFILE CATALOG
CONTENTS
Lobe Selection, Ordering and Services
2–6
Hydraulic Flat Tappet Profiles
7–9
Hydraulic Roller Profiles
10–16
Hydraulic Roller Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–12
Application Specific LT4 and Vortec Hydraulic Roller Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Chevrolet LS Engine Family Hydraulic Roller Lifter Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . 13–15
CNG Powered Industrial Hydraulic Roller Profiles. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chrysler 5.7–6.1 Gen3 Hemi Hydraulic Roller Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Chevrolet Small Block Top Stock Hydraulic Roller Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Mechanical Flat Tappet Profiles
17–22
Mechanical Roller Profiles
23–43
Mechanical Roller Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23–42
Engine or Application Specific Mechanical Roller Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42–43
Specialized Profiles
44–63
Flat Tappet Stock Lift Rules Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44–46
Flat Tappet and Hydraulic Roller Stock Lift Rules Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Hydraulic Roller Stock Lift Rules Applications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
48
Specialty OHV and Flathead Applications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48–51
Mechanical Roller Profiles for Specialty OHV Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 50–51
Direct Actuation Follower SOHC and DOHC Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51–53
Engine Specific for Direct Actuation Follower SOHC and DOHC Applications . . . . . . . . . . . 54
Engine Specific for Translating Follower SOHC and DOHC . . . . . . . . . . . . . . . . . . . . . . . . . . 55–61
Harley–Davidson® V2 Profiles
62–63
Evolution™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Twin-Cam™ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Camshaft Recommendation Form
64
cranecams.com | 866.388.5120
1
Introduction
This latest version of our Cam Lobe Profile Catalog contains
most of the recent and popular recommended lobe shapes
that we currently advise. There are literally thousands of
additional profiles available, from our early street and racing
grinds, to antique restoration and factory replacement
grinds dating back to the early 1900’s. Virtually any grind
that Crane Cams has produced can still be provided.
If you have a specific requirement that isn’t listed, please
contact our Performance Consultant staff at 866-388-5120
for additional information.
Custom Profile Cams
Consideration is also given as to the type of valve
train. Engines having an overhead valve style valve
train (cam-lifter-pushrod-rocker arm-valve), can not
utilize as much positive acceleration at the follower
as those engines having direct-actuation valve trains
(cam-follower-valve), due to the comparative stiffness of
each style. Although the minimum tappet diameter and
basic specifications may appear quite similar there are
serious lobe design differences, mandating that these
types not be interchanged.
Hydraulic and mechanical lobe profiles also have design
differences, especially in the clearance ramps. Without
going into great detail, you should never use hydraulic
lifters on a mechanical lifter cam, nor is it advised to use
mechanical lifters on a hydraulic lifter cam.
Although the Crane Cams catalog includes an extensive
variety of camshafts, many applications occur that may
require a camshaft selection not found in our standard Crane Cams also has available lobe series for most
listings. This is not an unusual happening at Crane SOHC and DOHC direct actuation and also translating
Cams where custom ground cams are produced daily. “slipper” follower valve train engines. As virtually each
We maintain the largest lobe profile library of any of these engines utilize their own unique valve train
performance cam grinder, an accumulation that began geometry, lobe designs can not usually be interchanged
among engines, even though their valve trains may
with our founding in 1953.
appear identical in configuration.
We cover the entire spectrum of internal combustion
engine applications, ranging from stationary power plants to Due to space limitations we cannot list all of these
Top Fuel dragsters. Prototype work is performed for a variety series here, and recommend that you contact the
of clients from the giant Original Equipment Manufacturers Crane Cams Performance Consultant staff for specific
to the individual engine builder/racer. Custom production recommendations.
runs are also commonplace for an equally diverse range
of customers. Proprietary work is also a function of our Notes on Minimum Tappet Diameter
diversity throughout the OEM and performance markets.
For flat tappet grinds this is the smallest tappet face
It is always recommended that our staff of Performance
Consultants be contacted at 866-388-5120 as the first
step in the initiation of a special camshaft order. Their
combined decades of experience in all forms of camshaft
applications can easily save the customer time (and
money) when refining their particular combination.
Basic Rules to Follow When Considering a
Custom-Ground Camshaft
Our hydraulic and mechanical profiles are designed
for a particular finished lobe size and lifter diameter.
Applying a lobe design to an engine having a smaller
base circle diameter than the lobe is intended for, will
probably cause the minimum radius of curvature (which
usually occurs at, or near, the maximum lift point) to
decrease to an unacceptable level. This will cause
premature lobe and lifter failure.
Our hydraulic and mechanical roller profiles are also
designed for a particular finished lobe size and lifter wheel
diameter. These must be known to produce the proper
finished cam grind.
2
diameter advisable for use with the particular profile.
Use of a smaller face diameter tappet will result in the
lobe to lifter contact point going off of the edge of the
tappet, usually causing immediate lobe and tappet wear
and failure. A larger tappet can be used without this wear
potential, however you may be sacrificing tappet velocity
(which usually increases performance) if other profiles
are available for larger tappets.
Common Values for Tappet Diameters
.842”
SB and BB Chevy, Pontiac and Buick V8
.875”
SB and BB Ford V8
.904”
Chrysler and AMC V8
For more information on Minimum Tappet Diameter
and how it affects your application, call a Crane Cams
Performance Consultant at 866-388-5120.
Important—Lobe Design Size When
Choosing a Roller Grind
Our roller profiles are designed for a particular finished lobe
size, as determined by roller wheel diameter or base circle
radius requirements. We have provided a column indicating
the Lobe Design Size for each of the listed profiles.
Coding
A
1.786” Nominal Journal Diameter
Buick V6 and V8, Cadillac 368–500 V8, or
special small base circle diameter, such as
Chevrolet 262–400 V8 requiring connecting rod
to cam clearance in long stroke applications.
B
Chevrolet 262–400 and 348–409 V8, and
Pontiac 265–455 V8
C
1.948”–1.968” or 50 mm Journal Diameter
Chevrolet 262–400 V8 LRB, Chevrolet 396–454
V8 and 8.1L V8, Plymouth-Dodge 273–360
V8, 350–440 V8 and Hemi 426 V8, Oldsmobile
265–455 V8.
D
an “A” application, not only would a duration loss of six
degrees take place, but also a negative radius of curvature
(inverted flank) may try to occur during the grinding process,
resulting in a finished lobe shape that is not representative
of the actual design. This may result in unstable valve train,
possibly causing component failure.
Lobes that are intended to have this inverted flank (Crane
Cams HIR and IR series) are carefully designed and
manufactured using a special process to prevent this
condition. Even so, HIR and IR camshafts are not normally
advised for high RPM applications due to their relative
harshness on the valve train.
Important—Lifter Wheel Size When
Choosing a Roller Grind
Our roller profiles are also designed for a particular wheel
size on the roller lifter.
Popular Wheel Diameters
.700”
Used on Many Hydraulic Roller Lifters
Ford 221–302 and 351C–400 V8, AMC V8
.750”
Used on Most .842” and .875” Diameter
Mechanical Roller Lifters
E
Ford 352–428 V8, Ford 429–460, Ford 429 Boss
Hemi V8, and other engines.
.815”
Used on Most .904” Diameter Mechanical
Roller Lifters
F
55 mm or 2.165” Nominal Journal Diameter
Chevrolet LS1 V8, Ford LRB, and other engines.
.850”
Used on Most .937” Diameter Mechanical
Roller Lifters
J
57 mm or 2.245’ Journal Diameter
Chrysler 5.7–6.1L Hemi.
.920”
Used on Most 1.000” and 1.062” Diameter
Mechanical Roller Lifters
K
2.280” Journal Diameter
G
H
Some lobe designs have masters generated for more
than one size category. These have been indicated where
applicable. When a roller lobe designed for one journal
size is applied to an engine having a different nominal
journal size, a duration change will occur. For example, an
“A” lobe ground on a “C” engine camshaft will realize a
four-degree increase at 0.050” cam lift. There is usually a
two-degree change between design size series. Caution
must be used when selecting a larger sized lobe for a
smaller lobe application. If a “D” lobe were used on
Consideration must be made when changing the size of
the wheel from the usual diameter as this will affect the
duration of the lobes. As the wheel diameter increases
the duration also increases. The duration in the lower lobe
lift areas (.001”–025”) will not change very much, as the
pressure angle between the lobe in the wheel is not greatly
affected. However, at .050” lobe lift, as the wheel size
increases, the duration will increase nearly two degrees
for each diameter increment as listed above. Conversely,
as the wheel diameter decreases the duration will also
decrease. Lobe lift is not affected by the wheel diameter.
Be sure to specify what wheel diameter that you will be
using, as the desired opening and closing figures (and
duration) may not be obtained if this isn’t compensated
for. Many lobe profiles have been generated for more than
one wheel size in order to produce the proper lifter motion
for these changes.
3
Special Cam Services Price Schedule
The following basic price schedule (which is subject to
change without notice) covers services offered. Additional
quotes will be submitted on request. All prices are FOB,
Daytona Beach, FL.
Design
Cam Profile Design—Inelastic system with Accelerated
Ramps. Lift table with velocities and accelerations in
one degree spacing will be furnished.
Each Profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call for Quote
Manufacture
Grind customer’s round lobe 8620 steel billet
camshaft core—includes copper plate, rough grind,
heat treat and finish grind. For roller camshafts that
require base circle undercutting, an additional labor
charge is required.
Each 1 Cyl. Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98070
Each 4 Cyl. Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . .Labor PN 98071
Each 6 Cyl. Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98072
Cam Profile Design
Each V8 Camshaft
(Rough Grind/Heat Treat Only). . . . . . . . . . . . . Labor PN 98064
Inelastic system with Accelerated Ramps, for slipper
follower type applications. Lift table with velocities and
accelerations in one degree spacing will be furnished.
Each V8 Camshaft . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98085
Profile Smoothing
Computer smoothing of your cam profile design.
Performs smooth blending of ramps, nose and
roughness-smoothed. Lift table will be furnished.
Tooling (Plate or Masters)
Generate Van Norman/Berco Plate Master Cam Profile.
Grind to five decimal place data. (Included verification
check of submitted design for errors.)
Each Valve Profile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call for Quote
Generate Van Norman/Berco Plate for customersupplied camshaft. (Includes base circle runout
correction.)
Each Single Pattern Plate . . . . . . . . . . . . . . . . . . . . . . Call for Quote
Each Dual Pattern Plate Set . . . . . . . . . . . . . . . . . . Call for Quote
4
Grind Crane Cams round lobe 8620 steel billet
camshaft core. For roller follower camshafts that
require base circle undercutting, an additional labor
charge is required.
Most V8 Round Lobe Steel
Billet Cams Includes Core . . . . . . . . . . . . . . . . . .Labor PN 98061
Most 6 Cyl. Round Lobe Steel
Billet Cams, Includes Core . . . . . . . . . . . . . . . . Labor PN 98086
Most 4 Cyl. Round Lobe Steel
Billet Cams, Includes Core . . . . . . . . . . . . . . . . Labor PN 98062
Grind one sample camshaft from customer’s unground
lobe camshaft and inspect for conformance to design
data. Customer to furnish semi-finished cam billet if
Crane Cams billet is not available.
Each Camshaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Call for Quote
Misc. manufacturing services—For services not listed,
contact Crane Cams for a quote.
Grind Camshaft with Five
Bearing Journals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98076
Install 5/16” Dowel Pin . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98087
Groove One Cam Bearing
Journal for Oiling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98088
Drill and Tap for
Sander Rear Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98089
Copper Plate Customer’s
Round Lobe Steel Billet Camshaft
Up to 24” Long . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98098
Grind Gearfit Step
on Front Journal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98073
Misc. Labor—Per Hour . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98111
Inspection
Profile Check single intake and exhaust lobe to verify
lift and timing against furnished specifications.
Each Camshaft. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Labor PN 98014
Cam Lobe measurement and computer analysis.
Complete report giving lift, velocity, acceleration
and graphs.
First Valve Lobe on Camshaft. . . . . . . . . . . . . . . Call for Quote
Each Additional Valve Lobe . . . . . . . . . . . . . . . . . . Call for Quote
Packaging For Shipment
Special wooden crates: For shipment when standard
cardboard packaging will not offer adequate protection.
Each Cam . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Approx. $40.00 Ea.
Prototype Cam Services
Crane Cams utilizes computer programs to perform
precision cam profile measurements and design
analysis. This enables Crane Cams to constantly update
and improve their entire product line, plus prototype
development for other cam and engine manufacturers.
Crane Cams offers a broad scope of services and
capabilities from a single source—a unique and extremely
advantageous feature. This multi-faceted service can
provide a complete package of engine cam development
and manufacturing, from design through sample cams for
developmental evaluation at a low total cost.
The “as measured” cam profile analysis services are the
most accurate measurement and analysis data currently
available in the industry. A precision measurement
facility is located in the Crane Cams facility and is
used in many phases of Crane Cams’ production and
development work, as well as by various other engine
and cam manufacturers.
Sharing equal importance with the physical measurements
are the computer analysis techniques employed in
processing the “as measured” data. This process
permits a broad and accurate analysis of the data with
corrections to systematic and random errors, which occur
in all measurement procedures. The resulting computer
printout is an exceedingly accurate lift data (to the
nearest 10 millionths of an inch) of the actual measured
profile. This data can then be immediately compared to
the design data.
One outstanding feature of the cam profile analysis
program allows one degree (or 2½ degree) design data to
be read into the computer, which will immediately return
printout cutting data in one-half degree increments. This
unique feature permits a model cam to be generated on
one-half degree increments of maximum accuracy, even
though the original design was tabulated in one-degree
increments.
Only the latest equipment is incorporated into the
extensive cam development facilities at Crane Cams.
Equipment is only as good as the people that use it,
however, and Crane Cams personnel have been one of
the main keys to the firm’s successful rise to the “Number
One” rating in the high performance cam industry. Crane
Cams fully appreciates the importance of care, accuracy,
speed and competence, and reflects this concern in its
total involvement in all cam facets, from design through
volume production.
5
Tooling
From design data, the first step in cam profile production
is the generation of the master cam lobe. At Crane Cams
this is the most critical and precision step in cam profile
manufacturing, since every step from this point forward
can result in possible accumulative errors and deviations
from the desired profile, requiring extreme detail and
attention to be applied to the project.
From the master cam blank, a rough cam shape is first
rough ground on a cam grinder. The final rough and finish
grinding is performed on a numerically controlled grinder.
The grinder has a basic resolution of one millionth of an
inch, with a complete system resolution of 10 millionths of
an inch, and a grinding accuracy and repeatability of plus
or minus 15 millionths.
Manufacturing
Crane Cams utilizes Landis, Berco, Van Norman and
Norton Automatic cam grinders for production cam
grinding. If production volume run cams are desired,
Crane Cams offers the highest quality at competitive
prices, backed up by the fastest delivery possible.
Inspection
or sample cam profile. Relative smoothness can be
instantly reviewed for comparison, as well as lobe-to
lobe variations in profiles. The viewed trace on the
oscilloscope truly gives a “fingerprint” of the cam profile
almost instantly, and with a minimum of set-up.
Conclusions can be quickly established relating to
dynamic problems due to design or manufacture. This
machine is also utilized to select optimum lobes, average
lobes, or worst lobes, for further inspection and analysis,
or for copying profiles on developmental or test cams.
Also located at the Crane Cams facility in Daytona
Beach, FL, is the physical measurement equipment.
Another custom designed installation, this machine
performs precise measurement of “as made” cam
profiles, conducts mathematical analysis to correct for
systematic and random errors, and provides velocity and
acceleration data.
Features include a basic resolution of .000010 inch
and two arc seconds. An extremely high accuracy of
20 millionths of an inch (mean standard deviation) is
maintained through the operating system employed and
close temperature control of the measurement room.
Ground and lapped carbide utilized as cam followers,
maintain high precision and accuracy.
Crane Cams production run inspection procedures,
designed to check production cams for accuracy, Our Adcole gauge is considered to be the standard of the
plus establishing performance parameters of a given industry for camshaft design verification and production.
camshaft of profile, is a very useful and rapid measuring This is the measuring equipment virtually demanded by
device (Adcole 911) with resolution to .0001 inch and the original equipment manufacturers for quality control
purposes. Measurements are precise to within 1/10
one-quarter of one degree.
micron (0.0001 mm) and 0.001 degrees. ComputerA custom-built dynamic inspection machine is utilized aided control combines extreme accuracy with speed,
in many critical inspection areas to rapidly indicate and provides for complete plot traces of deviations from
acceleration, velocity, displacement and jerk of a model, the programmed standards.
Lobe Profile Nomenclature
F - 262 / 3734
Example:
Profile Code
H
Hydraulic
HR Hydraulic Roller
F
Mechanical Flat Tappet
R
Mechanical Roller Lifter
6
Duration at .050” Lobe Lift
Lobe Lift
HYDRAULIC FLAT TAPPET PROFILES
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
TAPPET LIFT TOP DEAD CENTER
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
GROSS VALVE LIFT WITH ZERO LASH AT
THEORETICAL ROCKER RATIO SHOWN
1.50
1.60
MINIMUM
TAPPET
DIAMETER
1.70
1.76
SEE PAGE 2
.417
.451
.476
.475
.501
.500
.527
.500
.553
.578
.604
.629
.432
.467
.493
.492
.519
.518
.546
.518
.573
.598
.626
.651
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
HP
HP-184/2454
HP-194/2654
HP-204/2800
HP-208/2795
HP-214/2947
HP-218/2942
HP-224/3100
HP-228/2942
HP-234/3254
HP-244/3400
HP-254/3554
HP-264/3700
HP hydraulic series intended for conservative street use and factory
performance upgrades. Designed for .842" diameter or larger tappets.
240
.0040
85
.019
.009
.368
.393
250
.0040
101
.030
.014
.398
.425
260
.0040
113
.044
.022
.420
.448
264
.0040
114
.050
.026
.419
.447
270
.0040
124
.059
.032
.442
.472
274
.0040
125
.066
.037
.441
.471
280
.0040
135
.076
.044
.465
.496
284
.0040
134
.083
.050
.441
.471
290
.0040
145
.093
.059
.488
.521
300
.0040
155
.110
.075
.510
.544
310
.0040
165
.128
.092
.533
.567
320
.0040
175
.145
.109
.555
.592
HMV
H-192/2667
H-198/2754
H-204/2847
H-210/2934
H-216/3027
H-222/3114
H-228/3200
HMV (Hydraulic Maximum Velocity) hydraulic series intended for mid-range torque and
street use, also fuel economy. Designed to make maximum use of .842” diameter tappets.
248
.0040
83
.029
.013
.400
.427
.453
.469
254
.0040
106
.036
.017
.413
.441
.468
.485
260
.0040
114
.044
.021
.427
.456
.484
.501
266
.0040
120
.053
.027
.440
.469
.499
.516
272
.0040
127
.064
.037
.454
.484
.515
.533
278
.0040
133
.074
.041
.467
.498
.529
.548
284
.0040
139
.085
.049
.480
.512
.544
.563
H-234/3294
H-238/3347
H-240/3378
H-248/3500
H-252/3500
H-256/3500
Z
H-206/288
H-212/297
H-218/306
H-224/315
H-230/324
H-236/327
H-240/3291
H-244/331
H-248/333
290
294
296
304
308
312
.0040
.0040
.0040
.0040
.0040
.0040
144
148
152
159
164
167
.093
.100
.103
.118
.124
.131
.059
.065
.070
.081
.090
.095
.494
.502
.507
.525
.525
.525
.527
.536
.540
.560
.560
.560
.560
.569
.574
.595
.595
.595
.580
.589
.595
.616
.616
.616
The Z hydraulic lobes are our most aggressive series for use with .842” diameter tappets.
Short seat timing with maximum area under the curve provides outstanding performance.
256
.0040
117
.047
.021
.432
.461
.490
.507
262
.0040
124
.056
.028
.446
.475
.505
.523
268
.0040
130
.066
.035
.459
.490
.520
.539
274
.0040
137
.077
.044
.473
.504
.536
.554
280
.0040
143
.087
.053
.486
.518
.551
.570
286
.0040
148
.098
.063
.491
.523
.556
.576
290
.0040
152
.105
.070
.494
.526
.559
.579
294
.0040
156
.112
.077
.497
.530
.563
.582
298
.0040
160
.119
.084
.500
.533
.566
.586
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
7
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
MINIMUM
TAPPET
DIAMETER
SEE PAGE 2
CCH1
H-194/250
H-198/255
H-202/260
H-210/270
H-214/275
H-218/280
H-226/290
H-230/295
H-234/300
H-242/310
H-250/320
CCH1 hydraulic series created for performance hydraulic applications requiring higher
engine speeds on smaller diameter lobes. Designed for .842” diameter or larger tappets.
252
.0040
90
.031
.015
.375
.400
.425
.440
256
.0040
97
.036
.017
.383
.408
.434
.449
260
.0040
102
.042
.020
.390
.416
.442
.458
268
.0040
112
.053
.028
.405
.432
.459
.475
272
.0040
117
.059
.032
.413
.440
.468
.484
276
.0040
122
.065
.037
.420
.448
.476
.493
284
.0040
131
.078
.047
.435
.464
.493
.510
288
.0040
135
.084
.053
.443
.472
.502
.519
292
.0040
140
.091
.059
.450
.480
.510
.528
300
.0040
149
.105
.071
.465
.496
.527
.546
308
.0040
158
.118
.084
.480
.512
.544
.563
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
CCH2
H-190/260
H-194/265
H-198/270
H-202/275
H-206/280
H-210/285
H-214/290
H-218/295
CCH2 hydraulic series created for performance hydraulic applications requiring
even higher engine speeds. Designed for .842” diameter or larger tappets.
252
.0040
93
.027
.014
.390
.416
.442
256
.0040
98
.032
.016
.398
.424
.451
260
.0040
103
.037
.019
.405
.432
.459
264
.0040
108
.042
.022
.413
.440
.468
268
.0040
112
.047
.025
.420
.448
.476
272
.0040
116
.053
.029
.428
.456
.484
276
.0040
121
.059
.033
.435
.464
.493
280
.0040
125
.065
.037
.443
.472
.502
.458
.466
.475
.484
.493
.502
.510
.519
.842
.842
.842
.842
.842
.842
.842
.842
.510
.519
.527
.536
.544
.553
.561
.578
.528
.537
.546
.554
.563
.572
.581
.598
.842
.842
.842
.842
.842
.842
.842
.842
H1 hydraulic series created for engines with large diameter lobes and
long rocker ratios, such as big block Chevrolet, used in performance
and marine applications. Designed for .842” diameter or larger tappets.
280
.0042
128
.067
.040
.461
.491
.522
286
.0042
134
.076
.047
.471
.502
.534
290
.0042
138
.082
.053
.477
.509
.541
296
.0042
144
.092
.061
.488
.520
.553
300
.0042
148
.098
.067
.494
.526
.559
306
.0042
154
.108
.076
.504
.538
.571
.082
.510
.544
.578
310
.0042
158
.115
.540
.553
.560
.572
.579
.591
.598
.842
.842
.842
.842
.842
.842
.842
H-222/3001
H-226/305
H-230/3101
H-234/315
H-238/320
H-242/325
H-246/330
H-254/340
H1
H-220/307
H-226/314
H-230/318
H-236/325
H-240/329
H-246/336
H-250/340
284
288
292
296
300
304
308
316
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
129
134
138
142
146
150
155
163
.071
.078
.084
.091
.098
.104
.111
.125
.042
.047
.053
.058
.064
.070
.077
.090
.450
.458
.465
.473
.480
.488
.495
.510
.480
.488
.496
.504
.512
.520
.528
.544
Continued on next page.
8
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
MINIMUM
TAPPET
DIAMETER
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
SEE PAGE 2
.089
.102
.115
.516
.530
.543
.550
.565
.579
.585
.600
.615
.605
.621
.637
.842
.842
.842
H1
H-254/344
H-262/353
H-270/362
Continued from previous page.
314
322
330
.0042
.0042
.0042
162
170
178
.122
.136
.149
HC904
H-210/280
H-218/293
H-224/300
H-225/320
H-230/306
H-230/3201
H-235/346
H-245/366
HC904 hydraulic series created for Chrysler and AMC engines
using .904” diameter tappets for street and endurance applications.
260
.0110
113
.052
.032
.420
.448
270
.0100
124
.063
.039
.440
.469
280
.0090
130
.070
.045
.450
.480
280
.0090
136
.073
.046
.480
.512
290
.0080
135
.079
.052
.459
.490
300
.0080
139
.079
.052
.480
.512
290
.0080
149
.090
.059
.519
.554
300
.0080
160
.111
.075
.549
.586
.476
.498
.510
.544
.520
.544
.588
.622
.493
.516
.528
.563
.539
.563
.609
.644
.904
.904
.904
.904
.904
.904
.904
.904
H2
H-202/2880
H-212/3040
H-222/3200
H-232/3360
H-242/3520
H-252/3680
H2 hydraulic series created for Chrysler and AMC engines
using .904” diameter tappets for street and racing applications.
274
.0040
114
.039
.023
.431
.461
284
.0040
125
.053
.032
.456
.486
294
.0040
136
.069
.044
.480
.512
304
.0040
146
.087
.058
.504
.538
314
.0040
156
.105
.073
.528
.563
324
.0040
166
.122
.089
.552
.589
.490
.517
.544
.571
.598
.626
.507
.535
.563
.591
.620
.648
.904
.904
.904
.904
.904
.904
.653
.676
.904
.538
.563
.588
.612
.637
.649
.662
.674
.686
.904
.904
.904
.904
.904
.904
.904
.904
.904
H-262/3840
H3
H-212/306
H-220/320
H-228/334
H-236/348
H-244/362
H-248/369
H-252/376
H-256/383
H-260/390
334
.0040
176
.141
.107
.576
.614
H3 hydraulic series created for Chrysler and AMC engines using .904” diameter
tappets for street and racing applications. More aggressive than the H2 series.
268
.0040
127
.056
.030
.459
.490
.520
276
.0040
136
.068
.040
.480
.512
.544
284
.0040
145
.082
.050
.501
.534
.568
292
.0040
153
.097
.063
.522
.557
.592
300
.0040
161
.112
.075
.543
.579
.615
304
.0040
166
.119
.082
.554
.590
.627
308
.0040
170
.127
.090
.564
.602
.639
312
.0040
174
.134
.097
.575
.613
.651
316
.0040
178
.142
.104
.585
.624
.663
9
HYDRAULIC ROLLER PROFILES
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.76
SEE PAGE 3
HR1
HR-206/313
HR-210/319
HR-214/325
HR-218/332
HR-222/339
HR-226/345
HR-230/352
HR-234/359
HR-238/365
HR-240/372
HR-242/372
HR-242/375
HR-244/372
HR-246/372
HR-248/372
HR-250/372
HR-254/372
HR-258/372
HR-260/372
HR-262/372
HR-270/372
HR-278/372
HR2
HR-198/311
HR-206/325
HR-210/332
HR-214/339
HR-222/352
HR-230/365
HR-238/378
HR-248/391
HR-252/391
HR3
HR-184/256
HR-194/271
HR-204/286
HR-208/292
HR-214/301
HR1 hydraulic roller series created for high lift applications with good stability.
268
.0040
124
.047
.026
.470
.501
.532
.551
272
276
280
284
288
292
296
300
302
304
306
306
308
310
312
316
320
322
324
332
340
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
128
132
137
141
145
150
154
158
161
163
161
164
166
167
170
173
174
177
179
183
190
.053
.059
.065
.072
.078
.085
.093
.100
.104
.108
.104
.112
.116
.119
.124
.131
.139
.143
.146
.155
.169
.030
.034
.038
.043
.048
.053
.058
.064
.067
.070
.070
.074
.077
.080
.084
.091
.098
.102
.106
.118
.132
.479
.488
.498
.509
.518
.528
.539
.548
.558
.558
.563
.563
.558
.558
.558
.558
.558
.558
.558
.558
.558
.510
.520
.531
.542
.552
.563
.574
.584
.595
.595
.600
.595
.595
.595
.595
.595
.595
.595
.595
.595
.595
.542
.553
.564
.576
.587
.598
.610
.621
.632
.632
.638
.632
.632
.632
.632
.632
.632
.632
.632
.632
.632
HR2 hydraulic roller series used for large cubic inch high lift applications.
260
.0040
117
.041
.018
.467
.498
.529
268
272
276
284
292
300
308
316
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
126
131
135
144
152
160
170
174
.047
.053
.059
.070
.084
.099
.120
.128
.026
.030
.034
.041
.052
.064
.080
.088
.488
.498
.509
.528
.548
.567
.586
.586
.520
.531
.542
.563
.584
.605
.626
.626
.553
.564
.576
.598
.620
.643
.665
.665
B C
.547
B
.572
.584
.597
.620
.642
.665
.688
.688
B
HR3 hydraulic roller series for mild performance and emissions legal camshafts
using stock springs. Designed for small block and big block Chevrolet size lobes.
240
.0040
89
.022
.009
.384
.410
.435
.451
250
260
264
270
.0040
.0040
.0040
.0040
102
115
119
127
.032
.044
.050
.059
.015
.023
.027
.033
.407
.429
.438
.452
.434
.458
.467
.482
.461
.486
.496
.512
B
.561
.572
.584
.597
.607
.620
.632
.642
.655
.655
.660
.655
.655
.655
.655
.655
.655
.655
.655
.655
.655
.477
.503
.514
.530
B C
B
B C
B C
B C
B C
B C
C
B C
C
C
B C
C
B
B C
C
C
B
B
B
D
B
D
B
B
B
B
C
C
B C
B C
B C
B C
B C
10
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DUR. AT
TAPPET LIFT AT
.200”
DESIGN
LOBE SIZE
CODE
104 DEG.
INTAKE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.068
.079
.089
.100
.039
.047
.056
.065
.465
.479
.492
.506
.496
.510
.525
.539
.527
.542
.558
.573
.546
.561
.577
.593
HR4 hydraulic roller series for mild performance and emissions legal
camshafts using stock springs. Designed for small block Ford size lobes.
246
.0040
95
.026
.012
.393
.419
.445
.461
D
.489
.517
.546
D
DEG.
IN.
SEE PAGE 3
HR3
HR-220/310
HR-226/319
HR-232/328
HR-238/337
HR4
HR-188/262
HR-198/278
HR-208/294
HR-218/310
HR6
HR-242/400
HR-246/400
HR-250/400
HR-254/400
HR-258/4001
HR-262/400
HR-266/400
HR-270/400
HR-274/400
HR-282/400
HRBR
HR-222/320
HR-226/3201
HR-234/354
HR-236/330
HR-236/340
HR-238/330
HR-242/350
HR-242/370
HR-258/350
HR-262/350
HR-264/314
HR-264/350
HR-264/420
HR-268/350
HR-272/420
276
282
288
294
256
266
276
.0040
.0040
.0040
.0040
.0040
.0040
.0040
134
140
146
154
107
119
131
.037
.050
.065
.018
.027
.037
.417
.441
.465
.445
.470
.496
HR6 hydraulic roller series for large displacement engines for
serious performance applications, with 50 mm journal diameter.
312
.0040
162
.106
.071
.600
.640
316
320
324
328
332
336
340
341
347
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
166
170
174
178
182
186
190
187
195
.114
.122
.130
.138
.145
.153
.161
.156
.172
.077
.083
.090
.097
.105
.113
.120
.124
.138
.600
.600
.600
.600
.600
.600
.600
.600
.600
.640
.640
.640
.640
.640
.640
.640
.640
.640
.473
.500
.527
B
C
C
C
D
D
.680
.704
C
.680
.680
.680
.680
.680
.680
.680
.680
.680
.704
.704
.704
.704
.704
.704
.704
.704
.704
C
C
C
C
C
C
C
C
C
HRBR hydraulic roller series created for big block or similar engine applications having high
rocker ratios, requiring excellent valve train stability and moderate RPM levels (up to 6500).
286
.0040
134
.066
.045
.544
.563
290
298
302
302
304
308
306
324
328
326
330
328
334
336
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
136
151
146
148
147
154
160
168
172
163
173
184
176
191
.072
.086
.087
.087
.090
.098
.100
.125
.132
.136
.136
.145
.143
.161
.050
.061
.063
.063
.066
.072
.073
.097
.103
.106
.107
.112
.114
.127
.544
.602
.561
.578
.561
.595
.629
.595
.595
.534
.595
.714
.595
.714
.563
.623
.581
.598
.581
.616
.651
.616
.616
.553
.616
.739
.616
.739
E
E
E
E
E
E
E
E
E
E
D
E
C
E
C
11
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
SEE PAGE 3
1.76
HIR
HIR-182/2734
HIR-190/2867
HIR-194/2934
HIR-198/3000
HIR-202/3067
HIR-206/3134
HIR-210/3200
HIR-214/3267
HIR-218/3334
HIR-222/3400
HIR-226/3467
HIR-230/3534
HIR-234/3600
HIR-238/3667
HIR-242/3735
HIR-246/3800
HIR-250/3867
HIR-254/3867
HIR-260/3867
HIR-270/3867
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
HIR hydraulic roller series created for very aggressive high lift applications. Designed for
small block size lobes with an inverted flank area. Not recommended for high RPM applications.
B
238
.0040
98
.020
.009
.410
.437
.465
.481
246
250
254
258
262
266
270
274
278
282
286
290
294
298
304
306
310
316
326
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
108
112
117
122
126
131
135
140
144
149
153
157
161
166
167
174
177
182
190
.028
.032
.037
.042
.047
.053
.059
.066
.073
.080
.088
.095
.104
.112
.116
.129
.136
.148
.165
.013
.016
.018
.022
.025
.029
.033
.037
.042
.047
.053
.059
.065
.071
.079
.085
.093
.104
.123
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
.430
.440
.450
.460
.470
.480
.490
.500
.510
.520
.530
.540
.550
.560
.570
.580
.580
.580
.580
.459
.475
.480
.491
.501
.512
.523
.533
.544
.555
.565
.576
.587
.598
.608
.619
.619
.619
.619
.487
.504
.510
.521
.533
.544
.555
.567
.578
.589
.601
.612
.623
.635
.646
.657
.657
.657
.657
.505
.522
.528
.540
.552
.563
.575
.587
.598
.610
.622
.634
.645
.657
.669
.681
.681
.681
.681
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
SEE PAGE 3
1.80
APPLICATION SPECIFIC LT4 AND VORTEC HYDRAULIC ROLLER PROFILES
These profiles may be used in other applications. Consult with the Crane Cams technical staff for recommendations.
HRL4
HR-238/350
HR-244/350
HR-250/350
HRCV
HR-214/316
HR-224/316
12
Chevrolet small block V8 with LT4 heads, HRL4 hydraulic
roller series, for applications having limited valve travel.
302
.0040
155
.097
.064
.525
308
314
.0040
.0040
160
164
.109
.120
.074
.083
.525
.525
.560
B
.560
.560
B
Chevrolet Vortec 350, HRCV hydraulic roller series, with .475” maximum lift rules.
276
.0040
130
.058
.034
.474
286
.0040
137
.074
.046
.474
B
B
B
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.80
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
CHEVROLET LS ENGINE FAMILY HYDRAULIC ROLLER PROFILES
LSHR1
HR-200/292
HR-200/294
HR-206/294
HR-208/2941
HR-214/294
HR-216/294
LSHR2
HR-204/324
HR-208/312
HR-210/312
HR-212/324
HR-216/312
HR-216/324
HR-218/324
HR-222/312
HR-222/324
HR-228/324
HR-232/350
HR-234/324
HR-236/352
HR-237/355
HR-238/324
HR-242/3585
HR-250/341
HR-256/350
HR-258/341
LSHR3
HR-194/295
HR-200/295
HR-200/2951
HR-208/2951
HR-210/3121
HR-210/3241
HR-214/344
HR-216/3241
HR-216/344
HR-218/3121
Chevrolet LS V8, LSHR1 hydraulic roller series, used in applications
using stock valve springs and standard rocker arm ratio.
262
.0040
114
.039
.021
258
270
272
278
280
.0040
.0040
.0040
.0040
.0040
112
118
119
123
124
.040
.047
.049
.058
.061
.020
.026
.028
.034
.036
Chevrolet LS V8, LSHR2 hydraulic roller series, with
increased ramp rates and more area under the curve.
264
.0040
126
.044
.023
276
272
272
284
278
280
284
284
290
288
296
292
293
300
298
314
312
322
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
121
127
132
128
134
135
135
138
143
153
147
156
157
149
162
161
171
167
.050
.052
.055
.060
.061
.065
.071
.071
.081
.085
.092
.093
.095
.098
.105
.117
.130
.131
.030
.029
.031
.037
.036
.038
.043
.043
.051
.060
.059
.067
.068
.065
.077
.082
.101
.095
Chevrolet LS V8, LSHR3 hydraulic roller series,used in
applications requiring stable and quiet valve control.
254
.0040
110
.031
.016
262
262
270
272
272
275
278
277
280
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
114
114
119
126
129
138
133
139
131
.039
.039
.049
.052
.052
.059
.061
.062
.064
.020
.020
.027
.029
.029
.033
.035
.035
.038
.496
F
.500
.500
.500
.500
.500
F
F
F
F
F
.551
.583
F
.530
.530
.551
.530
.551
.551
.530
.551
.551
.595
.551
.598
.604
.551
.609
.580
.595
.580
.562
.562
.583
.562
.583
.583
.562
.583
.583
.630
.583
.634
.639
.583
.645
.614
.630
.614
F
.502
.531
F
.502
.502
.502
.530
.551
.585
.551
.585
.530
.531
.531
.531
.562
.583
.619
.583
.619
.562
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
13
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.80
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
LSHR3
HR-220/3241
HR-220/3333
HR-222/3241
HR-222/344
HR-224/3241
HR-224/344
HR-228/3241
HR-228/3333
HR-228/344
HR-228/353
HR-232/3241
HR-232/353
HR-236/3241
HR-236/353
HR-238/3333
HR-240/3241
HR-240/353
HR-246/353
LSHS347
HR-216/347
Chevrolet LS V8, LSHS347 hydraulic roller series, used in high speed performance applications.
273
.0040
140
.058
.038
.590
.625
HR-218/347
HR-220/347
HR-222/347
HR-224/3441
HR-224/347
HR-226/347
HR-228/347
HR-230/347
HR-232/347
HR-234/347
HR-236/347
HR-238/347
HR-240/347
HR-242/347
HR-244/347
HR-246/347
HR-248/347
HR-250/347
HR-252/347
14
282
281
284
283
286
285
290
289
287
290
294
294
298
298
299
302
302
308
275
276
278
279
280
282
283
285
287
289
291
293
295
297
299
300
302
304
308
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
136
140
137
144
139
146
142
146
149
149
145
152
148
155
153
150
158
162
141
143
144
145
146
148
149
150
152
154
155
157
158
160
161
163
164
166
167
.068
.068
.071
.072
.074
.075
.081
.081
.082
.082
.088
.089
.095
.096
.100
.102
.104
.115
.061
.064
.067
.071
.071
.074
.078
.082
.085
.089
.093
.097
.100
.104
.108
.112
.115
.119
.123
.040
.040
.041
.041
.045
.045
.049
.049
.049
.051
.055
.056
.062
.062
.066
.068
.068
.078
.041
.043
.046
.049
.049
.051
.054
.057
.060
.064
.067
.070
.074
.077
.080
.084
.088
.091
.094
.551
.567
.551
.585
.551
.585
.551
.567
.585
.600
.551
.600
.551
.600
.567
.551
.600
.600
.590
.590
.590
.585
.590
.590
.590
.590
.590
.590
.590
.590
.590
.590
.590
.590
.590
.590
.590
.583
.600
.583
.619
.583
.619
.583
.600
.619
.635
.583
.635
.583
.635
.600
.583
.635
.635
.625
.625
.625
.619
.625
.625
.625
.625
.625
.625
.625
.625
.625
.625
.625
.625
.625
.625
.625
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.80
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
LSHS367
HR-216/367
HR-218/367
HR-220/367
HR-222/367
HR-224/367
HR-226/367
HR-228/367
HR-230/367
HR-232/367
HR-234/367
HR-236/367
HR-238/367
HR-240/367
HR-242/367
HR-244/367
HR-246/367
HR-248/367
HR-250/367
HR-252/367
HR-254/367
HR-256/367
HR-258/367
HR-260/367
HR-262/367
HR-264/367
HR-266/367
HR-268/367
HR-270/367
HR-272/367
LSHS382
HR-220/382
HR-230/382
HR-240/382
Chevrolet LS V8, LSHS367 hydraulic roller series, used in
high speed performance applications requiring more lift.
272
.0040
143
.058
.038
274
276
278
280
283
285
287
289
291
293
295
297
299
301
303
305
307
309
311
313
315
317
319
321
323
325
327
329
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
.0040
145
146
148
149
151
152
154
156
158
159
160
162
164
165
167
168
170
171
173
174
176
177
179
180
182
183
185
187
.061
.064
.067
.071
.074
.078
.082
.086
.089
.093
.097
.101
.105
.109
.113
.117
.121
.125
.129
.133
.136
.140
.143
.147
.150
.154
.157
.160
.041
.043
.046
.049
.051
.054
.057
.060
.063
.067
.070
.073
.077
.080
.084
.087
.091
.094
.098
.102
.105
.109
.113
.116
.120
.123
.126
.130
Chevrolet LS V8, LSHS382 hydraulic roller series, used in high
speed performance applications requiring .650” lift with 1.7 rockers.
276
.0040
148
.069
.041
287
297
.0040
.0040
156
164
.079
.102
.057
.073
.624
.661
F
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.624
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
.661
F
.649
.688
F
.649
.649
.688
.688
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
15
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.76
SEE PAGE 3
CNG POWERED INDUSTRIAL HYDRAULIC ROLLER PROFILES
HRNG
HR-160/190
HR-170/165
HR-170/190
HR-180/165
HR-180/190
HR-190/165
HR-200/165
Chevrolet 454-502 and 8.1L V8, HRNG hydraulic roller series, used in CNG powered industrial applications.
C
228
.0040
—
.007
.005
.323
245
238
255
248
265
275
.0040
.0040
.0040
.0040
.0040
.0040
—
—
—
—
—
—
.017
.013
.024
.020
.032
.042
.009
.007
.014
.011
.019
.026
.281
.323
.281
.323
.281
.281
C
C
C
C
C
C
CHRYSLER 5.7–6.12 GEN3 HEMI HYDRAULIC ROLLER PROFILES
HRH1
HR-208/297
HR-210/3236
HR-214/297
HR-216/3236
HR-222/3236
HR-228/3236
Chrysler 5.7–6.1L Hemi V8, HRH1 hydraulic roller series, with 57 mm journal diameter.
268
.0040
121
.022
.029
.505
268
274
274
280
286
.0040
.0040
.0040
.0040
.0040
131
125
136
140
145
.052
.054
.062
.072
.083
.028
.036
.035
.042
.051
J
.550
.505
.550
.550
.550
J
J
J
J
J
CHEVROLET SMALL BLOCK TOP STOCK HYDRAULIC ROLLER PROFILES
HR7
HR-260/330
HR-264/330
HR-268/330
HR-272/330
HR-276/330
16
IHRA Top Stock, HR7 hydraulic roller series, for restricted lift applications.
316
.0040
174
.139
.102
.495
.528
.561
320
324
328
332
.0040
.0040
.0040
.0040
178
182
186
191
.147
.155
.162
.169
.109
.117
.124
.132
.495
.495
.495
.495
.528
.528
.528
.528
.561
.561
.561
.561
.581
B
.581
.581
.581
.581
B
B
B
B
MECHANICAL FLAT TAPPET PROFILES
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
IN.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
MINIMUM
TAPPET
DIAMETER
SEE PAGE 2
F1
F-236/3177
F-246/3294
F-256/3412
F-266/3528
F-276/3648
F-286/3765
F1 mechanical series created for oval track and marine engines with higher rocker ratios, such as the
big block Chevrolet, where stable upper RPM valve motion is required. Recommended lash is .026”.
272
.0200
138
.082
.064
.477
.508
.540
.559
.842
282
.0200
149
.098
.077
.494
.527
.560
.580
.842
292
.0200
159
.115
.092
.512
.546
.580
.601
.842
302
.0200
169
.131
.107
.529
.564
.600
.621
.842
312
.0200
179
.148
.121
.547
.584
.620
.642
.842
322
.0200
189
.165
.137
.565
.602
.640
.663
.842
F2
F-198/270
F-218/2933
F-228/3067
F-238/3200
F-248/3334
F-258/3468
F2 mechanical series created for street use and mid-range
torque applications. Recommended lash is .022”.
260
.0140
102
.038
.023
.405
280
.0140
122
.064
.038
.440
290
.0140
134
.079
.050
.460
300
.0140
144
.094
.063
.480
310
.0140
155
.111
.078
.500
320
.0140
165
.128
.092
.520
F3
F-244/3454
F-248/3514
F-252/3574
F-256/3634
F-260/3694
F-264/3754
F-268/3814
F-272/3874
F-276/3934
F-280/3994
F-284/4054
F-288/4114
F3 mechanical series created for racing applicatios with stable valve control.
This series has an excellent racing history. Designed to make full use
of .842” diameter tappets. Recommended lash is .026”.
280
.0200
152
.104
.072
.518
.553
.587
284
.0200
156
.111
.078
.527
.562
.597
288
.0200
160
.118
.084
.536
.572
.608
292
.0200
164
.124
.091
.545
.581
.618
296
.0200
169
.132
.097
.554
.591
.628
300
.0200
172
.139
.104
.563
.601
.638
304
.0200
177
.147
.109
.572
.610
.648
308
.0200
180
.153
.117
.581
.620
.659
312
.0200
184
.158
.124
.590
.629
.669
316
.0200
189
.166
.132
.599
.639
.679
320
.0200
192
.174
.139
.608
.649
.689
324
.0200
196
.181
.145
.617
.658
.699
TLF1
F-246/3467
F-250/3534
F-254/3600
F-258/3667
F-262/3734
F-264/3767
F-266/3800
F-270/3867
TLF mechanical series created for oval track racing. Designed to
make full use of .842” diameter tappets. Recommended lash is .012”.
282
.0160
155
.109
.076
.520
.555
286
.0160
159
.116
.082
.530
.565
290
.0160
163
.123
.087
.540
.576
294
.0160
167
.130
.094
.550
.587
298
.0160
171
.137
.100
.560
.597
300
.0160
173
.141
.104
.565
.603
302
.0160
175
.144
.107
.570
.608
306
.0160
179
.151
.114
.580
.619
.432
.469
.491
.512
.533
.555
.459
.499
.521
.544
.567
.590
.475
.516
.540
.563
.587
.610
.842
.842
.842
.842
.842
.842
.608
.618
.629
.640
.650
.661
.671
.682
.692
.703
.714
.724
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.589
.601
.612
.623
.635
.640
.646
.610
.622
.634
.645
.657
.663
.669
.842
.842
.842
.842
.842
.842
.842
.657
.681
.842
17
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
MINIMUM
TAPPET
DIAMETER
1.50
1.60
1.70
1.76
SEE PAGE 2
.590
.600
.610
.629
.640
.651
.669
.680
.691
.692
.704
.716
.842
.842
.842
.584
.590
.597
.603
.609
.615
.621
.627
.634
.640
.646
.651
.658
.664
.670
.677
.683
.689
.695
.708
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
.842
TLF1
F-274/3934
F-278/4001
F-282/4067
310
314
318
.0160
.0160
.0160
183
187
191
.158
.165
.172
.121
.128
.135
F13
F-234/332
F-236/3355
F-238/339
F-240/3425
F-242/346
F-244/3495
F-246/353
F-248/3565
F-250/3601
F-252/3635
F-254/367
F-256/370
F-258/374
F-260/3775
F-262/381
F-264/3845
F-266/388
F-268/3915
F-270/395
F-274/402
F13 mechanical series created for racing mechanical flat tappet. Designed to
make full use of .842” diameter tappets. Recommended lash is .014” to .016”.
259
.0200
146
.092
.059
.498
.531
.564
261
.0200
148
.096
.062
.503
.537
.570
263
.0200
150
.099
.066
.509
.542
.576
265
.0200
152
.103
.069
.514
.548
.582
267
.0200
154
.106
.072
.519
.554
.588
269
.0200
156
.110
.075
.524
.559
.594
271
.0200
158
.113
.079
.529
.565
.600
273
.0200
160
.117
.082
.535
.570
.606
275
.0200
162
.120
.085
.540
.576
.612
277
.0200
164
.124
.089
.545
.582
.618
279
.0200
166
.127
.092
.550
.587
.624
281
.0200
168
.129
.094
.555
.592
.629
283
.0200
170
.134
.099
.561
.598
.636
285
.0200
172
.138
.103
.566
.604
.642
287
.0200
174
.141
.106
.572
.610
.648
289
.0200
176
.145
.110
.577
.615
.654
291
.0200
178
.147
.112
.582
.621
.660
293
.0200
180
.152
.117
.587
.626
.666
295
.0200
182
.155
.120
.593
.632
.672
299
.0200
186
.161
.129
.603
.643
.683
FIT842
F-254/372
F-256/3401
F-258/379
F-260/3401
F-262/350
F-266/3552
FIT842 mechanical series created for racing mechanical flat tappet. Designed to make full use
of .842” diameter tappets. High ratio rocker arms advised. Recommended lash is .020” to .022”.
283
.0200
166
.120
.092
.558
.595
.632
.655
.842
285
.0020
164
.122
.094
.510
.544
.578
.599
.842
287
.0020
170
.127
.098
.569
.606
.644
.667
.842
289
.0020
167
.130
.101
.510
.544
.578
.599
.842
297
.0020
164
.122
.097
.525
.560
.595
.616
.842
301
.0020
168
.129
.103
.533
.568
.604
.625
.842
FC18
FC18 mechanical series created for racing mechanical flat tappet. Designed to make full use
of .842” diameter tappets, using 1.8 rocker arm ratios. Recommended lash is .020” to .022”.
1.8
F-238/310
F-248/310
F-250/325
270
280
282
.0200
.0200
.0200
141
148
154
.091
.107
.110
.062
.076
.079
.558
.558
.585
.842
.842
.842
18
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
MINIMUM
TAPPET
DIAMETER
SEE PAGE 2
FC18
1.8
F-254/330
F-262/340
286
294
.0200
.0200
158
166
.117
.131
.084
.097
.594
.612
.842
.842
F4
F-262/3851
F-264/388
F-266/391
F-268/394
F-270/397
F-272/400
F-274/403
F-276/406
F-278/409
F-280/4125
F-284/4125
F-286/4125
F4 mechanical series created for NASCAR® racing applications. This series has an excellent
racing history. Designed to make full use of .875” diameter tappets. Recommended lash is .018”.
298
.0200
174
.137
.101
.578
.616
.655
.678
.875
300
.0200
176
.141
.105
.582
.621
.660
.683
.875
302
.0200
178
.144
.108
.587
.626
.665
.688
.875
304
.0200
180
.149
.112
.591
.630
.670
.693
.875
306
.0200
182
.152
.115
.596
.635
.675
.699
.875
308
.0200
184
.156
.118
.600
.640
.680
.704
.875
310
.0200
186
.159
.122
.605
.645
.685
.709
.875
312
.0200
188
.163
.126
.609
.650
.690
.715
.875
314
.0200
190
.167
.130
.614
.654
.695
.720
.875
316
.0200
192
.171
.133
.619
.660
.701
.726
.875
320
.0200
196
.179
.141
.619
.660
.701
.726
.875
322
.0200
198
.182
.144
.619
.660
.701
.726
.875
F5
F-246/370
F-250/376
F-254/382
F-258/388
F-260/391
F-262/394
F-264/397
F-266/400
F-268/403
F-270/406
F-272/409
F-274/412
F-276/415
F-278/4181
F-280/421
F-286/430
F5 mechanical series created for NASCAR® racing applications.
Designed to make full use of .875” diameter tappets. Recommended lash is .018”.
278
.0200
158
.109
.076
.555
.592
.629
.651
282
.0200
162
.116
.082
.564
.602
.639
.662
286
.0200
166
.123
.088
.573
.611
.649
.672
290
.0200
170
.130
.095
.582
.621
.660
.683
292
.0200
172
.134
.098
.587
.626
.665
.688
294
.0200
174
.137
.102
.591
.630
.670
.693
296
.0200
176
.141
.105
.596
.635
.675
.699
298
.0200
178
.145
.109
.600
.640
.680
.704
300
.0200
180
.148
.112
.605
.645
.685
.709
302
.0200
182
.152
.116
.609
.650
.690
.715
304
.0200
184
.156
.119
.614
.654
.695
.720
306
.0200
186
.159
.123
.618
.659
.700
.725
308
.0200
188
.163
.126
.623
.664
.706
.730
310
.0200
190
.167
.130
.627
.669
.711
.736
312
.0200
192
.170
.134
.632
.674
.716
.741
318
.0200
198
.181
.145
.645
.688
.731
.757
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
TLF2
F-258/3642
F-260/3821
TLF2 mechanical series created for NASCAR® racing applications.
Designed to make full use of .875” diameter tappets. Recommended lash is .012”.
294
.0160
170
.133
.094
.546
.583
.619
.641
296
.0160
172
.136
.098
.573
.611
.650
.672
.875
.875
19
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
MINIMUM
TAPPET
DIAMETER
1.50
1.60
1.70
1.76
SEE PAGE 2
.546
.582
.587
.555
.591
.555
.596
.600
.605
.609
.609
.609
.609
.628
.609
.638
.583
.621
.626
.592
.631
.592
.636
.640
.645
.650
.650
.650
.650
.670
.650
.680
.619
.660
.665
.629
.670
.629
.676
.680
.685
.691
.691
.691
.691
.712
.691
.723
.641
.683
.688
.651
.694
.651
.700
.704
.710
.715
.715
.715
.715
.737
.715
.748
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
TLF2
F-262/3642
F-264/3881
F-266/3911
F-268/3700
F-268/3941
F-270/3700
F-270/3975
F-272/4001
F-274/4032
F-276/4063
F-278/4063
F-280/4063
F-282/4063
F-284/4188
F-286/4063
F-288/4250
298
300
302
304
304
306
306
308
310
312
314
316
318
320
322
324
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
174
176
178
180
180
182
182
183
186
188
190
192
194
196
198
200
.140
.144
.147
.151
.151
.155
.155
.158
.162
.166
.170
.173
.177
.181
.184
.188
.101
.104
.108
.111
.111
.114
.114
.118
.122
.125
.129
.132
.136
.140
.143
.147
F6 mechanical series is designed for unrestricted NASCAR® engines with 50 mm cam journals,
using 1.8 rocker arm ratios. Recommended lash is .020” intake and .022” exhaust.
F6
1.8
F-270/376
F-274/384
F-278/392
304
308
312
.0200
.0200
.0200
176
180
184
.142
.150
.157
.108
.115
.121
.677
.691
.706
.875
.875
.875
F7 mechanical series is designed for unrestricted NASCAR® engines with 50 mm cam journals,
using 1.9 rocker arm ratios. Recommended lash is .020” intake and .022” exhaust.
F7
1.9
F-259/353
F-263/359
F-265/362
F-267/365
F-269/368
F-271/371
F-273/374
F-275/377
F-277/380
F-279/383
F-281/386
F-283/389
F-285/392
20
294
298
300
302
304
306
308
310
312
314
316
318
320
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
164
168
170
172
174
176
178
180
182
184
186
188
190
.120
.127
.130
.134
.137
.141
.145
.149
.152
.156
.160
.163
.167
.090
.096
.099
.102
.105
.108
.111
.115
.118
.121
.125
.128
.131
.671
.682
.688
.694
.699
.705
.711
.716
.722
.728
.733
.739
.745
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
.875
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
MINIMUM
TAPPET
DIAMETER
1.50
1.60
1.70
1.76
SEE PAGE 2
F10
F10 mechanical series is designed for unrestricted NASCAR® engines with 50 mm cam
journals, using 1.8 rocker arm ratios. Recommended lash is .020” intake and .022” exhaust.
1.8
F-270/392
F-272/3981
F-274/404
F-276/4103
F-278/4101
F-280/4102
F-286/428
F-288/432
FN55
F-270/4061
F-274/415
F-278/428
F-280/428
F-284/4281
F8
302
304
306
308
311
314
319
321
.0200
.0200
.0200
.0200
.0200
.0200
.0020
.0020
177
180
183
185
185
185
194
195
.145
.149
.153
.157
.158
.158
.173
.177
.110
.113
.117
.120
.121
.122
.136
.139
.706
.717
.727
.739
.738
.738
.770
.778
.875
.875
.875
.875
.875
.875
.875
.875
FN55 mechanical series is designed for unrestricted NASCAR® engines with 55 mm cam
journals, using high rocker arm ratios. Recommended lash is .020” intake and .022” exhaust.
320
306
311
313
317
.0020
.0020
.0020
.0020
.0020
178
183
186
187
194
.146
.154
.158
.162
.169
.110
.117
.121
.125
.132
1.9
1.95
.772
.789
.813
.813
.813
.792
.809
.835
.835
.835
.875
.875
.875
.875
.875
F8 mechanical series designed for restricted NASCAR® engines with 50 mm cam
2.0
F-232/330
F-238/336
F-242/340
F-246/344
F-258/356
F9
264
270
274
278
290
.0200
.0200
.0200
.0200
.0200
140
146
150
154
166
.082
.091
.098
.104
.125
.055
.062
.068
.073
.091
.660
.672
.680
.688
.712
.875
.875
.875
.875
.875
F9 mechanical series designed for restricted NASCAR® engines with 50 mm cam
1.8
F-234/310
F-240/348
F-244/354
F-248/3601
F-252/366
F-264/384
266
272
276
280
284
296
.0200
.0200
.0200
.0200
.0200
.0200
138
148
152
157
161
173
.080
.094
.100
.107
.114
.135
.060
.065
.070
.076
.081
.100
.558
.626
.637
.648
.659
.691
.875
.875
.875
.875
.875
.875
21
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
IN.
104 DEG.
INTAKE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
MINIMUM
TAPPET
DIAMETER
SEE PAGE 2
F11
F-228/3334
F-238/3467
F-248/3600
F11 mechanical series created for Chrysler and AMC engines using .904” diameter
tappets for street and mid-range torque applications. Recommended lash is .028” to .030”.
264
.0200
140
.078
.050
.500
.533
.567
.587
274
.0200
148
.093
.063
.520
.555
.589
.610
284
.0200
158
.110
.077
.540
.576
.612
.634
.904
.904
.904
F904
F-255/370
F-265/385
F-275/400
F-285/410
F-295/410
F-305/410
F904 mechanical series created for Chrysler and AMC engines using .904” diameter
tappets with stable valve motion for conservative performance and endurance
racing applications. Recommended lash is .022” intake and .026” exhaust.
296
.0200
163
.115
.083
.555
.592
.629
.651
306
.0200
173
.135
.101
.578
.616
.655
.678
316
.0200
183
.155
.119
.600
.640
.680
.704
326
.0200
193
.173
.137
.615
.656
.697
.722
336
.0200
203
.191
.154
.615
.656
.697
.722
346
.0200
212
.208
.172
.615
.656
.697
.722
.904
.904
.904
.904
.904
.904
F904A
F-258/3734
F-268/3867
F-278/4000
F-288/4133
F-298/4133
F904A mechanical series created for Chrysler and AMC engines using
.904” diameter tappets with stable valve motion for racing applications.
294
.0200
168
.127
.093
.560
.597
.635
306
.0200
176
.142
.107
.580
.619
.657
316
.0200
185
.158
.121
.600
.640
.680
326
.0200
195
.176
.140
.620
.661
.703
330
.0200
204
.194
.156
.620
.661
.703
.657
.681
.704
.727
.727
.904
.904
.904
.904
.904
F12
F-248/3602
F-258/3735
F-268/3868
F-278/4002
F-288/4134
F12 mechanical series created for Chrysler and AMC engines using
.904” diameter tappets for racing applications. Recommended lash is .026”.
284
.0200
156
.104
.080
.540
.576
.612
294
.0200
166
.119
.097
.560
.598
.635
304
.0200
177
.137
.113
.580
.619
.658
314
.0200
186
.155
.130
.600
.640
.680
324
.0200
196
.173
.147
.620
.661
.703
.634
.657
.681
.704
.728
.904
.904
.904
.904
.904
NOPOP1
F-292/398
F-298/414
F-304/414
NOPOP1 mechanical series originally created for Chrysler Hemi
fuel drag race applications. Recommended lash is .028”.
332
.0162
200
.184
.150
.597
.637
338
.0162
206
.194
.161
.621
.662
344
.0162
212
.206
.172
.621
.662
.700
.729
.729
.904
.904
.904
22
.677
.704
.704
MECHANICAL ROLLER PROFILES
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.76
SEE PAGE 3
SR
SR-212/314
SR-220/326
SR-228/338
SR-236/350
SR-240/356
SR-244/362
SR-248/368
SR-250/374
SR-252/374
SR-254/374
SR-256/374
SR-260/374
SR-262/374
SR-264/374
SR-268/374
SR-270/374
SR-274/374
SR400
SR-236/400
SR-240/400
SR-244/400
SR-248/400
SR-252/400
SR-256/400
SR-258/400
SR-260/400
SR-264/400
CDS
R-250/395
R-252/395
R-255/395
R-257/395
R-260/395
R-265/395
R-270/400
R-275/3987
R-280/400
SR Street Roller series created for late model engines running mechanical rollers requiring
quiet valve train operation, due to monitoring by knock sensors. Recommended lash is .020".
B
262
.0150
123
.055
.034
.471
.502
.534
.553
270
278
286
290
294
298
300
302
304
306
310
312
314
318
320
324
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
.0150
132
140
149
153
157
162
164
166
168
169
172
174
176
179
182
185
.066
.077
.090
.097
.104
.111
.115
.118
.122
.126
.133
.136
.140
.147
.150
.157
.041
.050
.060
.065
.071
.078
.081
.084
.087
.090
.097
.100
.104
.111
.114
.121
.489
.507
.525
.534
.543
.552
.561
.561
.561
.561
.561
.561
.561
.561
.561
.561
.522
.541
.560
.570
.579
.589
.598
.598
.598
.598
.598
.598
.598
.598
.598
.598
.554
.575
.595
.605
.615
.626
.636
.636
.636
.636
.636
.636
.636
.636
.636
.636
.574
.595
.616
.627
.637
.648
.658
.658
.658
.658
.658
.658
.658
.658
.658
.658
SR400 Street Roller .400" lift series for mechanical rollers in serious street and marine
performance applications. Recommended lash is .020" intake and .022" exhaust.
274
.0200
157
.089
.060
.600
.640
.680
.704
278
282
286
290
294
296
298
302
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
159
163
167
170
174
176
178
182
.096
.103
.111
.119
.127
.131
.135
.143
.066
.070
.076
.082
.089
.093
.097
.104
.600
.600
.600
.600
.600
.600
.600
.600
.640
.640
.640
.640
.640
.640
.640
.640
.680
.680
.680
.680
.680
.680
.680
.680
.704
.704
.704
.704
.704
.704
.704
.704
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
B
CDS Cam Dynamics roller series created for oval track and endurance racing applications.
Gentle valve motion with a proven history. Recommended lash is .030".
B
287
.0200
164
.112
.079
.593
.632
.672
.467
289
292
294
297
302
307
315
320
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
167
169
172
173
178
181
182
188
.117
.121
.126
.132
.140
.148
.152
.161
.082
.087
.090
.094
.103
.112
.116
.125
.593
.593
.593
.593
.593
.600
.598
.600
.632
.632
.632
.632
.632
.640
.638
.640
.672
.672
.672
.672
.672
.680
.678
.680
.467
.467
.467
.467
.467
.704
.702
.704
C
B
C
B
B
B
B
B
23
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.134
.143
.629
.630
.671
.672
.713
.714
.738
.739
SEE PAGE 3
CDS
R-285/4194
R-290/4200
TR
TR-242/3867
TR-250/400
TR-252/4036
TR-256/4167
TR-260/4167
TR-260/4200
TR-262/4036
TR-266/4167
TR-270/4167
TR-270/4200
TR-274/410
TR-276/4167
TR-276/4200
TR-280/4167
TR-282/4200
TR-286/4167
395
R-252/3951
R-256/395
R-262/395
R-264/395
R-268/395
400
R-240/400
R-244/400
R-248/400
R-252/400
405
R-258/4051
R-264/4051
R-266/405
24
325
330
.0200
.0200
194
200
.172
.178
B
B
TR Track Roller series created for oval track and endurance racing applications with a proven
history. A benchmark from which other cams are measured. Recommended lash is .022".
B
282
.0195
158
.094
.071
.580
.619
.657
.681
290
286
296
300
294
296
306
310
304
314
316
310
320
316
326
.0195
.0200
.0195
.0195
.0200
.0200
.0195
.0195
.0020
.0195
.0195
.0200
.0195
.0200
.0195
166
171
171
175
179
181
181
185
189
186
191
195
194
200
200
.110
.117
.123
.129
.134
.137
.141
.152
.155
.156
.162
.170
.166
.183
.179
.082
.089
.093
.099
.104
.107
.108
.116
.120
.117
.126
.132
.134
.144
.142
.600
.605
.625
.625
.630
.605
.625
.625
.630
.615
.625
.630
.625
.630
.625
.640
.646
.667
.667
.672
.646
.667
.667
.672
.656
.667
.672
.667
.672
.667
.680
.686
.708
.708
.714
.686
.708
.708
.714
.697
.708
.714
.708
.714
.708
.704
.710
.733
.733
.739
.710
.733
.733
.739
.722
.733
.739
.733
.739
.733
B
C
B
B
B
C
B
B
B
C
B
B
B
B
B
395 Roller series created for oval track and endurance racing applications
with 55 mm journals, usually with 1.6, and up to 2.0, rocker arm ratios. Easy on
valve springs. Recommended lash is .020" intake and .022" exhaust.
284
.0200
169
.117
.088
.593
.632
.672
.695
288
296
298
302
.0200
.0200
.0200
.0200
173
174
175
178
.125
.129
.132
.138
.094
.100
.103
.109
.593
.593
.593
.593
.632
.632
.632
.632
.672
.672
.672
.672
F
.695
.695
.695
.695
F
F
F
F
400 roller series created for oval track and endurance racing applications with 2.036" journals,
usually with 1.6 or higher rocker arm ratios. Recommended lash is .020" intake and .022" exhaust.
D
272
.0200
159
.092
.072
.600
.640
.680
.704
276
280
284
.0200
.0200
.0200
163
166
170
.099
.107
.138
.078
.084
.109
.600
.600
.600
.640
.640
.640
.680
.680
.680
.704
.704
.704
D
D
D
405 roller series created for oval track and endurance racing applications with 55 mm journals,
usually with 1.6 or higher rocker arm ratios. Recommended lash is .020" intake and .022" exhaust.
E
290
.0200
177
.131
.099
.608
.648
.689
.713
296
298
.0200
.0200
182
184
.142
.148
.112
.116
.608
.608
.648
.648
.689
.689
.713
.713
E
E
G
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.76
SEE PAGE 3
415
R-266/415
R-270/415
R-276/415
420
R-244/420
R-246/420
R-248/420
R-252/420
R-256/420
R-258/420
R-260/420
R-262/420
R-264/420
R-266/420
R-268/420
R-270/420
R-272/420
R-274/420
R-276/420
R-278/420
R-280/420
R-282/420
R-284/420
R-286/420
R-290/420
438
R-236/438
R-240/438
R-246/438
R-250/438
R-258/438
R-262/438
R-264/438
R-268/438
R-272/438
R-274/438
415 roller series created for oval track and endurance racing applications
with 50 mm journals. Recommended lash is .020" intake and .024" exhaust.
300
.0200
180
.138
.108
.623
.664
.707
304
310
.0200
.0200
183
187
.144
.154
.114
.124
.623
.623
.664
.664
.707
.707
.730
C
.730
.730
C
420 roller series created for oval track racing applications including sprint cars,
and endurance applications, up to 8,200 RPM. Proven performance and reliability.
Recommended lash is .020”, allowing for a tight cold setting on aluminum engines.
276
.0200
166
.105
.070
.630
.672
.714
.739
278
280
284
288
290
292
294
296
298
300
302
304
306
308
310
312
314
316
318
322
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
.739
438 roller series created as a step up from the 420 series with improved
high-RPM dynamics. Recommended lash is .016" intake and .018" exhaust.
266
.0200
160
.094
.061
.657
.701
.745
.771
B
.771
.771
.771
.771
.771
.771
.771
.771
.771
B
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
169
169
173
176
178
180
182
183
185
187
189
191
193
195
196
198
200
202
202
203
164
169
173
178
181
183
187
191
193
.109
.113
.121
.129
.133
.137
.141
.145
.150
.154
.158
.162
.166
.170
.174
.178
.182
.186
.190
.198
.102
.113
.121
.129
.137
.141
.150
.163
.167
.073
.081
.087
.094
.098
.101
.105
.109
.113
.116
.120
.124
.128
.132
.136
.140
.145
.147
.149
.154
.067
.076
.083
.098
.105
.110
.117
.121
.125
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.630
.657
.657
.657
.657
.657
.657
.657
.657
.657
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
.672
B
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
.714
270
276
280
290
294
296
300
304
306
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
C
.701
.701
.701
.701
.701
.701
.701
.701
.701
.745
.745
.745
.745
.745
.745
.745
.745
.745
B
A B
A B
A B
B
A B
B
G
A B
G
B
A B
F
B
A B
B
A B
B
B
B
B
B
B
B
F
B
F
C
C
C
F
C
F
C
25
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DUR. AT
TAPPET LIFT AT
.200”
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.134
.149
.657
.657
.701
.701
.745
.745
.771
.771
C
4381 roller series created as a step up from the 420 series with improved high-speed
dynamics. Very stable, especially with small BCD lobes. Stable to 9000 RPM with
a 1.75 rocker ratio, 9500 RPM with a 1.7 rocker ratio with a properly set-up stable,
lightweight valve train. Recommended lash is .020" intake and .022" exhaust.
280
.0200
168
.107
.084
.657
.701
.745
.771
C
DEG.
104 DEG.
INTAKE
DESIGN
LOBE SIZE
CODE
IN.
SEE PAGE 3
438
R-276/438
R-286/438
4381
R-248/4381
R-250/4381
R-252/4381
R-254/4381
R-256/4381
R-258/4381
R-260/4381
R-262/4381
R-264/4381
R-266/4381
R-268/4381
R-270/4381
R-272/4381
R-274/4381
R-276/4381
R-278/4381
R-280/4381
R-282/4381
R-284/4381
R-286/4381
R-288/4381
R-290/4381
R-292/4381
R-294/4381
R-296/4381
R-298/4381
R-300/4381
LH
R-250/406
R-252/410
R-256/418
R-258/422
308
318
282
284
286
288
290
292
292
296
298
300
302
304
306
308
310
312
314
316
318
320
322
324
326
328
330
332
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
194
204
170
172
174
176
178
180
181
183
185
187
189
190
192
194
196
198
200
201
203
205
207
208
210
212
214
215
.164
.191
.111
.115
.119
.123
.127
.131
.135
.139
.144
.147
.152
.156
.160
.164
.169
.172
.177
.180
.184
.188
.192
.196
.200
.203
.207
.210
.087
.090
.094
.097
.101
.104
.108
.111
.115
.119
.123
.126
.130
.134
.137
.142
.146
.149
.153
.157
.161
.165
.169
.172
.176
.180
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.657
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.701
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.745
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
.771
F
C
C
C
B C D
F
B C
B C
F
B
F
B C
F
B C
F
B C D
F
B C
F
F
C
F
B C D
B
C
C
B
F
C
C
C
C
C
C
C
C
LH Low Harmonic roller series minimizes valve spring excitation in the RPM range of maximum
engine output. Results of testing have shown an increase of valve spring life in circle track,
marine, and bracket racing applications. Recommended lash is .020” intake and .022” exhaust.
D
282
.0200
166
.111
.081
.609
.650
.690
.715
284
288
290
.0200
.0200
.0200
168
173
175
.115
.123
.127
.084
.091
.094
.615
.627
.633
.656
.669
.675
.697
.711
.717
.722
.736
.743
B
D
C D
26
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.76
SEE PAGE 3
LH
R-260/426
R-262/430
R-264/434
R-266/438
R-268/442
R-268/5201
R-270/446
R-272/450
R-272/5152
R-274/454
R-274/525
R-276/458
R-276/5152
R-276/5202
R-276/540
R-278/462
R-278/5201
R-280/466
R-280/5201
R-284/474
R-286/478
R-286/5201
R-286/540
R-288/472
R-288/5201
R-290/486
R-302/520
R-302/5202
R-304/5201
R-308/5201
R-310/5201
R-312/5201
R-316/5201
R-318/5151
R-318/525
R-320/5152
R-320/525
LH Low Harmonic roller series minimizes valve spring excitation in the RPM range of maximum
engine output. Results of testing have shown an increase of valve spring life in circle track,
marine, and bracket racing applications. Recommended lash is .020” intake and .022” exhaust.
C D
292
.0200
177
.131
.097
.639
.682
.724
.750
294
296
298
300
298
302
304
302
306
304
308
306
305
305
310
308
312
310
316
318
316
314
320
317
322
334
332
334
338
340
342
346
350
348
350
350
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
179
181
183
185
187
187
189
191
191
193
193
195
198
198
195
197
197
199
201
203
205
211
205
210
207
216
221
223
227
229
231
235
231
237
238
239
.135
.139
.143
.147
.151
.151
.156
.161
.160
.165
.164
.170
.176
.176
.169
.173
.173
.178
.183
.188
.192
.208
.192
.204
.197
.218
.231
.236
.246
.250
.254
.263
.254
.267
.268
.271
.100
.103
.107
.111
.111
.114
.118
.119
.122
.123
.125
.127
.131
.131
.129
.130
.133
.134
.141
.145
.147
.157
.149
.156
.153
.173
.182
.187
.197
.201
.206
.216
.208
.221
.224
.225
.645
.651
.657
.663
.780
.669
.675
.773
.681
.788
.687
.773
.780
.810
.693
.780
.699
.780
.711
.717
.780
.810
.723
.780
.729
.780
.780
.780
.780
.780
.780
.780
.773
.788
.773
.788
.688
.694
.701
.707
.832
.714
.720
.824
.726
.840
.733
.824
.832
.864
.739
.832
.746
.832
.758
.765
.832
.864
.771
.832
.778
.832
.832
.832
.832
.832
.832
.832
.824
.840
.824
.840
.731
.738
.745
.751
.884
.758
.765
.876
.772
.893
.779
.876
.884
.918
.785
.884
.792
.884
.806
.813
.884
.918
.819
.884
.826
.884
.884
.884
.884
.884
.884
.884
.876
.893
.876
.893
.756
.764
.771
.778
.915
.785
.792
.907
.799
.924
.806
.907
.916
.950
.813
.915
.820
.915
.834
.841
.915
.950
.831
.915
.855
.915
.916
.915
.915
.915
.915
.915
.907
.924
.907
.924
B C D
B C D
B C D
B C D
G
B C D
C D
F
C D
G
B C D
F
F
G
B C D
F
B
F
B
C D
F
F
C
C
C D
G
G
G
F G
F
F
F
E
F
F
F
27
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
SEE PAGE 3
1.76
LH2
R-268/432
R-270/436
R-272/440
R-276/448
R-278/452
R-280/456
R-282/4601
422
R-256/422
R-260/422
R-264/422
R-268/422
R-272/422
428
R-256/428
R-258/428
R-260/428
R-262/428
R-264/428
R-266/428
R-268/428
R-270/428
R-272/428
R-274/428
R-276/428
R-278/428
R-282/428
R-/428
430
R-256/4301
R-258/4301
R-258/4302
R-259/4301
R-260/4301
R-262/4521
LH2 Low Harmonic roller series minimizes valve spring excitation in the RPM range of maximum engine
output. Higher RPM potential than the original LH. Recommended lash is .020" intake and .022" exhaust.
C
298
.0200
181
.149
.111
.648
.691
.734
.760
300
302
306
308
310
312
.0200
.0200
.0200
.0200
.0200
.0200
184
186
191
194
196
199
.153
.157
.166
.171
.176
.180
.115
.119
.126
.130
.134
.138
.654
.660
.672
.678
.684
.690
.698
.704
.717
.723
.730
.736
.741
.748
.762
.768
.775
.782
.767
.774
.788
.796
.802
.810
422 roller series is used primarily as an intake lobe with high rocker arm ratios.
The lobes are sized on a .950 base circle diameter. Recommended lash is .012”.
284
.0220
177
.131
.096
.633
.675
.717
.743
288
292
296
300
.0220
.0220
.0220
.0220
181
184
188
192
.139
.147
.155
.164
.103
.110
.118
.126
.633
.633
.633
.633
.675
.675
.675
.675
428 roller, aggressive series for up to 1.8:1 rocker ratio. Popular oval
track series. Recommended lash is .020” intake and .022" exhaust.
286
.0200
175
.127
.090
.642
.685
288
290
292
294
296
298
300
302
304
306
308
312
330
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
176
178
180
182
184
186
188
190
190
191
191
194
210
.131
.135
.138
.143
.147
.151
.155
.160
.161
.162
.163
.172
.206
.094
.097
.101
.104
.108
.111
.115
.119
.124
.129
.132
.133
.167
.642
.642
.642
.642
.642
.642
.642
.642
.642
.642
.642
.642
.642
.685
.685
.685
.685
.685
.685
.685
.685
.685
.685
.685
.685
.685
.717
.717
.717
.717
.743
.743
.743
.743
.723
.753
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
C
C
C D
F
C
C D
C
F
A
A
A
A
A
B
F
A
C
F
A
C
F G
A
C
F G
A
C
F G
A
C
F G
A
C
F G
A
A
F
C
A
C
C
C
430 roller, aggressive high RPM series created for oval track racing applications including sprint cars.
Can be used with 1.85 ratio rockers with 55 mm journals and stiff valve train. Basic RPM potential about
500 less than comparable 4381 series grinds. Recommended lash is .020" intake and .022" exhaust.
B
284
.0200
181
.134
.100
.645
.688
.731
.757
286
286
287
288
290
.0200
.0200
.0200
.0200
.0200
182
182
183
184
188
.138
.138
.140
.143
.148
.104
.104
.106
.108
.112
.645
.645
.645
.645
.678
.688
.688
.688
.688
.723
.731
.731
.731
.731
.769
.757
.757
.757
.757
.796
B
F
D
F
F
28
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
SEE PAGE 3
430
R-262/4302
R-262/4303
R-262/4521
R-263/4301
R-263/4302
R-264/4302
R-264/4303
R-266/4301
R-266/4302
R-266/4781
R-268/4301
R-268/4302
R-272/4301
452
R-252/452
R-254/452
R-256/452
R-258/452
R-260/452
R-262/452
R-264/452
R-266/452
R-268/452
R-270/452
R-272/452
R-274/452
R-276/452
R-280/452
R-282/452
R-284/452
R-286/452
4467
R-252/4467
R-256/4467
R-258/4467
R-260/4467
R-262/4467
290
.0200
186
.146
.112
.645
.688
.731
.757
290
290
291
290
292
292
294
292
294
296
296
301
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
186
188
187
189
187
188
190
189
193
191
191
193
.147
.148
.149
.153
.150
.151
.155
.155
.158
.159
.160
.163
.112
.112
.114
.117
.115
.116
.120
.119
.121
.123
.124
.129
.645
.678
.645
.645
.645
.645
.645
.645
.717
.645
.645
.645
.688
.723
.688
.688
.688
.688
.688
.688
.765
.688
.688
.688
.732
.769
.731
.731
.731
.732
.731
.731
.813
.731
.731
.731
.757
.796
.757
.757
.757
.757
.757
.757
.841
.757
.757
.757
452 roller, aggressive series for up to 1.8:1 rocker ratio.
Recommended lash is .020” intake and .022" exhaust.
281
.0200
173
.122
.085
.678
.723
.768
.796
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.723
.768
.768
.768
.768
.768
.768
.768
.768
.768
.768
.768
.768
.768
.768
.768
.768
.796
.796
.796
.796
.796
.796
.796
.796
.796
.796
.796
.796
.796
.796
.796
.796
283
285
287
289
291
293
295
297
299
301
303
305
309
311
313
315
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
175
177
179
181
183
185
187
189
191
193
195
196
200
202
204
206
.126
.130
.134
.138
.142
.147
.151
.156
.160
.165
.169
.174
.183
.187
.192
.196
.089
.092
.095
.099
.103
.106
.110
.114
.118
.122
.126
.131
.139
.143
.147
.152
.678
.678
.678
.678
.678
.678
.678
.678
.678
.678
.678
.678
.678
.678
.678
.678
4467 roller series created for oval track and drag racing that gives a .700”+ net
valve lift when used with a 1.6:1 or greater rocker ratio. Recommended lash is .012”.
284
.0202
177
.126
.089
.670
.715
.759
.786
288
290
292
294
.0202
.0202
.0202
.0202
180
182
184
186
.139
.142
.144
.148
.096
.100
.104
.108
.670
.670
.670
.670
.715
.715
.715
.715
.759
.759
.759
.759
.786
.786
.786
.786
A B C
F
F
D
D
A B
F
D
A
F
C
F
A B
F
F
D
C
C D
C
F G
B C
B C
F
B C
G
B C
F G
B C
F G
B C
G
B C
F G
B C
F G
B C
A
C
G
C
F G
B
A
B
B
B
F
B
F
B C
F G
29
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.112
.115
.120
.124
.128
.132
.136
.140
.144
.149
.153
.161
.170
.670
.670
.670
.670
.670
.670
.670
.670
.670
.670
.670
.670
.670
.715
.715
.715
.715
.715
.715
.715
.715
.715
.715
.715
.715
.715
.759
.759
.759
.759
.759
.759
.759
.759
.759
.759
.759
.759
.759
.786
.786
.786
.786
.786
.786
.786
.786
.786
.786
.786
.786
.786
SEE PAGE 3
4467
R-264/4467
R-266/4467
R-268/4467
R-270/4467
R-272/4467
R-274/4467
R-276/4467
R-278/4467
R-280/4467
R-282/4467
R-284/4467
R-288/4467
R-292/4467
4541
R-262/4541
R-264/4541
R-264/4542
R-264/4543
R-266/4541
R-268/4541
R-270/4542
R-272/4542
R-274/4541
R-278/4541
R-282/4541
R-284/4541
R-294/4541
R-304/4541
471
R-252/471
R-256/471
R-260/471
R-264/471
R-268/471
R-274/471
R-280/471
296
298
300
302
304
306
308
310
312
314
316
320
324
.0202
.0202
.0202
.0202
.0202
.0202
.0202
.0202
.0202
.0202
.0202
.0202
.0202
187
189
191
193
195
197
198
200
202
204
206
210
214
.152
.156
.161
.165
.170
.174
.178
.183
.187
.191
.195
.203
.212
B C
F G
B C
F G
B C
F
B C
B
F
F
B C
B
B C
B
B
B
B
4541 roller, stable high RPM series (when ground on 55 mm jourmal, or larger, core)
created for oval track and drag racing that gives a .726”+ net valve lift when used with a
1.6:1 or greater rocker ratio. Recommended lash is .020" intake and .022" exhaust.
293
.0200
182
.136
.108
.681
.727
.772
.799
295
297
296
297
299
303
303
305
309
313
315
328
339
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
184
183
184
185
187
188
190
196
199
203
205
205
212
.140
.140
.146
.143
.147
.151
.158
.172
.181
.189
.193
.188
.203
.111
.108
.107
.115
.118
.118
.124
.128
.136
.145
.149
.159
.174
.681
.681
.681
.681
.681
.681
.681
.681
.681
.681
.681
.681
.681
.727
.727
.727
.727
.727
.727
.727
.727
.727
.727
.727
.727
.727
.772
.772
.772
.772
.772
.772
.772
.772
.772
.772
.772
.772
.772
.799
.799
.800
.799
.799
.799
.799
.799
.799
.799
.799
.799
.799
F G
C
G
F
B
B
F
B
F
C
B C
B
B
B
C
C
471 roller series created for sprint car and drag racing applications that give .750"+ lift with 1.6
or greater rocker ratios. Also, large CID bracket racing engines and high torque Engine Masters
Challenge type of applications. Recommended lash is .020" intake and .022" exhaust.
C
284
.0200
177
.122
.090
.707
.754
.801
.829
288
292
296
300
306
312
.0200
.0200
.0200
.0200
.0200
.0200
180
183
186
188
193
198
.130
.138
.145
.150
.161
.173
.098
.105
.112
.117
.127
.138
.707
.707
.707
.707
.707
.707
.754
.754
.754
.754
.754
.754
.801
.801
.801
.801
.801
.801
.829
.829
.829
.829
.829
.829
C
B
B
G
G
C
E
G
30
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.145
.160
.707
.707
.754
.754
.801
.801
.829
.829
SEE PAGE 3
471
R-286/471
R-294/471
4168 IR
IR-248/410
IR-252/4134
IR-256/4168
IR-260/4168
IR-264/4168
IR-268/4168
IR-272/4168
IR-276/4168
IR-280/4168
4334 IR
IR-254/4334
IR-258/4334
IR-262/4334
IR-266/4334
IR-270/4334
IR-274/4334
IR-278/4334
422
R-262/422
R-266/422
4403
R-260/4403
R-262/4403
R-264/4403
R-266/4403
R-268/4403
R-270/4403
318
328
.0200
.0200
202
207
.183
.194
B C
G
B
H
4168 IR roller series created for oval track applications with aggressive inverted flank areas for small
block Chevrolet size lobes. Recommended lash is .012”. Not recommended for high RPM applications.
B
284
.0160
169
.114
.082
.615
.656
.697
.722
288
292
296
300
304
308
312
316
.0160
.0160
.0160
.0160
.0160
.0160
.0160
.0160
173
176
180
184
188
191
195
199
.122
.131
.139
.148
.157
.165
.173
.181
.088
.094
.101
.108
.116
.123
.131
.139
.620
.625
.625
.625
.625
.625
.625
.625
.661
.667
.667
.667
.667
.667
.667
.667
.703
.709
.709
.709
.709
.709
.709
.709
4334 IR roller series created from the Cam Dynamics series of masters for
oval track applications with aggressive inverted flank areas. Recommended
lash is .012”. Not recommended for high RPM applications.
278
.0245
179
.133
.093
.650
.693
.737
282
286
290
294
298
292
.0245
.0245
.0245
.0245
.0245
.0245
182
186
190
193
197
201
.142
.150
.160
.168
.176
.185
.100
.107
.115
.122
.130
.139
.650
.650
.650
.650
.650
.650
.693
.693
.693
.693
.693
.693
.737
.737
.737
.737
.737
.737
.728
.734
.734
.734
.734
.734
.734
.734
B
.763
B
.763
.763
.763
.763
.763
.763
B
B
B
B
B
B
B
B
B
B
B
B
B
422 roller series created for oval track and drag racing that gives a .650”+ net valve lift
when used with a 1.6:1 or higher rocker ratio. Sized on a .950” diameter base circle for
Buick and long stroke (small base circle) Chevrolet with a .012” recommended lash.
A
290
.0200
183
.143
.106
.633
.675
.714
.743
294
.0200
186
.151
.121
.633
.675
.714
.743
A
4403 roller series created as a step up from the 420 series with improved high-speed dynamics,
popular oval track intake lobes. Use with up to a 1.8 rocker ratio. Recommended lash is
.020" intake and .022" exhaust, allowing for a tight cold setting on aluminum engines.
B
290
.0200
182
.140
.102
.660
.704
.785
.775
292
294
296
298
300
.0200
.0200
.0200
.0200
.0200
184
186
188
190
192
.144
.148
.153
.157
.161
.105
.109
.113
.117
.121
.660
.660
.660
.660
.660
.704
.704
.704
.704
.704
.785
.785
.785
.785
.785
.775
.775
.775
.775
.775
F
B C
F
B C
F
B C
F
B C
F
B C
31
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
SEE PAGE 3
1.76
4440
R-258/4440
R-262/4440
R-266/4440
R-270/4440
R-274/4440
R-278/4440
R-282/4440
4188 IR
IR-252/4188
IR-262/4188
IR-268/4188
IR-272/4188
IR-278/4188
IR-286/4188
IR
IR-272/4714
IR-276/4714
IR-280/4778
IR-284/500
IR-288/500
IR-292/500
R1
R-236/3177
R-246/3294
R-256/3412
R-266/3528
R-276/3648
R-286/3765
R-296/394
R2
R-280/4468
R-290/446B
R-290/4618
4440 roller series created for oval track and drag racing that gives a .700”+ net valve lift
when used with a 1.6:1 or higher rocker ratio. Sized on a .900” diameter base circle for
Buick and long stroke (small base circle) Chevrolet. Recommended lash is .012".
A
286
.0220
181
.138
.099
.660
.710
.755
.781
290
294
298
302
306
310
.0220
.0220
.0220
.0220
.0220
.0220
185
189
192
196
200
204
.146
.155
.164
.173
.181
.190
.107
.115
.123
.131
.139
.148
.660
.660
.660
.660
.660
.660
.710
.710
.710
.710
.710
.710
.755
.755
.755
.755
.755
.755
.781
.781
.781
.781
.781
.781
4188 IR roller series created for oval track, marine, and drag racing applications
with aggressive inverted flank areas for the big block Chevrolet and similar
engines. Use with limited RPM applications. Recommended lash is .012”.
290
.0140
174
.125
.088
.628
.670
.712
.737
300
306
310
316
324
C
C
.830
.841
.880
.880
.880
C
.707
.717
.750
.750
.750
.670
.670
.670
.670
.670
A
.830
.136
.145
.154
.163
.172
.628
.628
.628
.628
.628
A
IR roller series created for Super Stock drag racing where aggressive
lobes are used with limited RPM. Recommended lash is .012”.
310
.0140
195
.168
.128
.707
.754
.801
.177
.186
.197
.205
.213
.105
.116
.124
.135
.152
A
C
199
203
208
211
215
.147
.160
.169
.181
.196
A
.737
.737
.737
.737
.737
.0140
.0140
.0140
.0140
.0140
183
189
193
198
205
A
.712
.712
.712
.712
.712
314
318
322
326
330
.0140
.0140
.0140
.0140
.0140
A
.754
.764
.800
.800
.800
.801
.812
.850
.850
.850
C
C
C
C
C
C
C
C
R1 roller series created for oval track and marine for the big block Chevrolet and other higher
rocker ratio engines, where stable high RPM valve motion is required. Recommended lash is .026”.
C
272
.0200
139
.082
.064
.477
.508
.540
.559
282
292
302
312
322
332
.0200
.0200
.0200
.0200
.0200
.0200
150
159
166
179
189
201
.098
.114
.126
.147
.165
.185
.077
.092
.107
.123
.130
.156
.494
.512
.529
.547
.565
.591
.527
.546
.564
.584
.602
.630
.560
.580
.600
.620
.640
.670
.580
.601
.621
.642
.663
.693
C
C
C
C
C
C
R2 roller series created for drag racing applications for engines like the big block Chevrolet and
Chrysler engines where stable high RPM valve motion is required. Recommended lash is .028”.
C
312
.0225
192
.168
.129
.670
.715
.760
.786
322
322
.0225
.0225
202
202
.188
.188
.148
.148
.669
.693
.714
.739
.758
.785
.785
.813
C
B C
32
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.161
.167
.173
.717
.717
.765
.764
.764
.816
.812
.812
.867
.841
.841
.897
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
R2
R-296/4778
R-300/4778
R-300/5098
4706
R-280/4706
R-282/4706
R-284/4706
R-286/4706
R-288/4706
R-290/4706
R-292/4706
R-294/4706
R-296/4706
R-300/4706
R-302/4706
R-304/4706
R-308/4706
R-310/4706
R-312/4706
R-314/4706
R-316/4706
R-318/4706
R-320/4706
R-322/4706
R-326/4706
490
R-292/490
R-302/490
R-306/490
R-312/490
NOPOP2
R-264/4334
R-268/4834
R-274/4334
R-278/413
328
332
332
.0225
.0225
.0225
209
213
215
.200
.207
.213
B C
G
C
4706 roller series created for drag racing applications for engines like the big block Chevrolet and
Chrysler engines, where stable exhaust valve motion is required. Recommended lash is .030”.
C
320
.0198
192
.165
.126
.706
.753
.800
.828
322
324
326
328
330
332
334
336
340
342
344
348
350
352
354
356
358
360
362
366
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
.0198
194
196
198
200
202
204
206
208
212
214
217
219
221
223
225
227
229
231
233
237
.169
.173
.178
.182
.186
.190
.195
.199
.205
.212
.218
.224
.228
.232
.236
.240
.245
.249
.252
.257
.129
.133
.137
.141
.145
.149
.153
.157
.163
.169
.175
.182
.186
.190
.194
.198
.203
.207
.211
.215
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.706
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.753
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
.800
490 roller series created for drag racing applications for engines like the big
block Chevrolet and Chrysler engines, where stable exhaust valve motion is
required. Recommended lash is .026" intake and .030" exhaust.
328
.0200
210
.204
.160
.735
.784
.833
338
342
348
.0200
.0200
.0200
219
223
228
.224
.232
.244
.180
.189
.201
.735
.735
.735
.784
.784
.784
.833
.833
.833
NOPOP2 roller series created for various drag race applications where stable
high RPM valve motion is required. Recommended lash is .026”.
304
.0162
176
.132
.103
.650
.693
.737
308
314
318
.0162
.0162
.0162
180
197
187
.139
.176
.157
.109
.130
.125
.725
.650
.620
.773
.693
.661
.822
.737
.702
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
.828
C
.862
C
.862
.862
.862
C
.763
C
.851
.763
.727
C
C
C
C
C
C
C
C
C
E
E
C
E
C
E
C
E
E
C
E
E
C
E
E F
C
E F
C
C
C
C
B C
33
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.125
.129
.135
.136
.136
.136
.140
.140
.139
.142
.142
.147
.144
.144
.144
.148
.147
.147
.147
.151
.150
.150
.154
.154
.159
.159
.163
.163
.167
.169
.170
.171
.169
.170
.172
.180
.181
.193
.185
.201
.675
.750
.705
.750
.641
.684
.750
.688
.700
.705
.750
.780
.638
.688
.707
.787
.623
.717
.720
.638
.720
.750
.660
.717
.653
.750
.773
.788
.773
.750
.773
.788
.701
.760
.750
.788
.750
.788
.701
.788
.720
.800
.752
.800
.683
.730
.800
.734
.747
.752
.800
.832
.681
.734
.754
.840
.664
.764
.768
.681
.768
.800
.704
.764
.696
.800
.824
.840
.824
.800
.824
.840
.747
.811
.800
.840
.800
.840
.747
.840
.765
.850
.799
.850
.726
.775
.850
.780
.794
.799
.850
.884
.723
.780
.801
.892
.706
.812
.816
.723
.816
.850
.748
.812
.740
.850
.876
.893
.876
.850
.876
.893
.794
.861
.850
.893
.850
.892
.794
.893
.792
.880
.827
.880
.752
.803
.880
.807
.822
.827
.880
.915
.749
.807
.830
.908
.730
.841
.845
.749
.845
.880
.774
.841
.766
.880
.906
.924
.906
.880
.906
.924
.822
.892
.880
.924
.880
.924
.822
.924
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
NOPOP2
R-280/450
R-280/500
R-282/4701
R-282/5001
R-284/427
R-284/456
R-284/5003
R-286/4588
R-286/4668
R-286/4701
R-286/500
R-286/5203
R-288/4254
R-288/4588
R-288/4714
R-288/5251
R-290/415
R-290/4778
R-290/480
R-292/4254
R-292/480
R-292/500
R-294/440
R-294/4778
R-296/435
R-296/500
R-296/515
R-296/525
R-298/515
R-300/500
R-300/515
R-300/525
R-302/467
R-302/5066
R-304/500
R-304/525
R-306/500
R-308/525
R-310/467
R-312/525
34
320
320
322
322
324
324
322
326
326
326
326
324
328
328
328
328
330
330
330
332
332
332
334
334
336
336
336
336
338
340
340
340
342
342
344
344
346
346
350
350
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
.0162
191
192
194
195
194
195
200
198
197
198
200
203
198
200
199
200
199
201
201
202
202
203
204
205
206
207
209
209
211
212
313
213
212
213
216
218
218
224
220
228
.165
.165
.167
.168
.170
.171
.172
.177
.176
.175
.182
.186
.179
.182
.180
.181
.182
.184
.185
.187
.187
.190
.190
.193
.195
.198
.198
.198
.202
.206
.208
.207
.206
.210
.216
.218
.221
.237
.223
.246
B C
C
C
E
C
B C
C
E
C
B C
C
C
E
C
B C
B C
B C
E
E
B C
C
C
B C
B C
C
E
G
C
C
B C
B C
E
C
G
F
C
G
E
G
E
G
C
E
C
C
F
E
G
E
C
C
C
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.76
SEE PAGE 3
481
R-268/481
R-272/481
R-274/481
R-276/481
R-280/481
R-282/481
R-284/481
R-286/481
R-288/481
R-290/481
R-292/481
R-294/481
R-296/481
R-296/502
R-298/481
R-300/481
R-302/530
R-304/481
R-304/502
R-304/530
R-306/481
R-306/502
R-308/502
R-308/530
R-310/5301
4765
R-278/4765
R-280/4765
R-282/4765
R-284/4765
R-286/4765
R-290/4765
R-294/4765
R-298/4765
R-302/4765
R-304/4765
481 roller series created for high RPM large cubic inch drag race engines. Recommended lash is .016”.
C
312
.0120
184
.147
.109
.722
.770
.818
.847
316
318
320
324
326
328
330
332
334
336
338
340
340
342
344
346
348
348
348
350
350
352
352
354
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
188
190
192
196
198
200
201
203
205
207
209
211
212
213
215
218
219
220
220
221
222
224
224
226
.156
.160
.164
.173
.177
.181
.185
.189
.194
.198
.202
.207
.209
.211
.215
.224
.225
.227
.227
.229
.231
.235
.238
.243
.116
.120
.124
.131
.135
.139
.143
.147
.151
.155
.159
.164
.164
.168
.172
.177
.181
.181
.181
.185
.186
.190
.191
.196
.722
.722
.722
.722
.722
.722
.722
.722
.722
.722
.722
.722
.688
.722
.722
.795
.795
.753
.795
.795
.753
.753
.795
.795
.770
.770
.770
.770
.770
.770
.770
.770
.770
.770
.770
.770
.734
.770
.770
.848
.848
.803
.848
.848
.803
.803
.848
.848
.818
.818
.818
.818
.818
.818
.818
.818
.818
.818
.818
.818
.780
.818
.818
.901
.901
.853
.901
.901
.853
.853
.901
.901
.847
.847
.847
.847
.847
.847
.847
.847
.847
.847
.847
.847
.808
.847
.847
.933
.933
.884
.933
.933
.884
.884
.933
.933
C
C
C
C
C
C
C
C
C
C
C
C
F
C
C
G
C
F G
G
C
F G
F
G
G
4765 roller series, symmetrical design created for high RPM drag race applications from the Cam
Dynamics series of masters. Primarily used as an intake lobe with a recommended lash of .030” to .035”.
B
312
.0240
190
.161
.121
.715
.762
.810
.839
314
316
318
320
324
328
332
336
338
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
192
194
196
197
201
205
209
212
215
.164
.169
.173
.177
.185
.194
.202
.208
.214
.125
.129
.132
.136
.144
.152
.160
.166
.172
.715
.715
.715
.715
.715
.715
.715
.715
.715
.762
.762
.762
.762
.762
.762
.762
.762
.762
.810
.810
.810
.810
.810
.810
.810
.810
.810
.839
.839
.839
.839
.839
.839
.839
.839
.839
B
B
G
B
G
B C
B
B
B
B
B
35
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.76
4589 roller series, symmetrical design created for high RPM drag race
applications from the Cam Dynamics series of masters. Primarily used as
an exhaust lobe with a recommended lash of .030” to .035”.
312
.0240
183
.149
.115
.688
.734
.780
SEE PAGE 3
4589
R-278/4589
R-282/4589
R-286/4589
R-288/4589
R-290/4589
R-294/4589
R-298/4589
R-302/4589
R-306/4589
R-308/4589
R-312/4589
R-314/4589
R-316/4589
R-318/4589
484
R-262/484
R-262/4841
R-262/4843
R-264/4841
R-266/484
R-266/4841
R-266/4843
R-268/4841
R-270/484
R-270/4841
R-270/4842
R-280/5003
R-292/484
R-294/4841
4841+
R-268/550
R-270/550
R-272/500
R-272/550
R-274/520
R-274/550
.808
B
.734
.734
.734
.734
.734
.734
.734
.734
.734
.734
.734
.734
.734
.780
.780
.780
.780
.780
.780
.780
.780
.780
.780
.780
.780
.780
.808
.808
.808
.808
.808
.808
.808
.808
.808
.808
.808
.808
.808
B
484 roller series is used primarily as an intake lobe on large
cubic inch drag race engines. Recommended lash is .016”.
306
.0120
180
.139
.101
.726
.774
.823
.852
C
.775
.775
.775
.774
.775
.775
.775
.774
.775
.775
.800
.774
.775
.823
.823
.823
.823
.823
.823
.823
.823
.823
.823
.850
.823
.823
.852
.852
.852
.852
.852
.852
.852
.852
.852
.852
.881
.852
.852
C
4841+ roller series is used primarily as an intake lobe on large
308
.0120
193
.152
.125
.825
.880
.935
.968
.935
.850
.935
.884
.935
.968
.880
.968
.915
.968
316
320
322
324
328
332
336
340
342
346
348
350
352
306
306
308
310
310
310
312
314
314
314
324
336
338
310
316
316
312
314
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0240
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
187
191
193
195
198
202
206
210
212
216
218
220
222
181
184
183
185
184
188
186
188
188
188
198
208
210
194
190
196
198
198
.157
.164
.169
.172
.180
.188
.196
.204
.208
.216
.220
.224
.227
.131
.144
.135
.147
.139
.153
.143
.156
.147
.139
.168
.200
.198
.156
.151
.161
.159
.166
.121
.128
.131
.135
.142
.147
.157
.164
.168
.176
.180
.184
.187
.108
.103
.111
.108
.115
.111
.119
.115
.123
.130
.143
.158
.172
.129
.127
.134
.133
.138
.688
.688
.688
.688
.688
.688
.688
.688
.688
.688
.688
.688
.688
.726
.726
.726
.726
.726
.726
.726
.726
.726
.726
.750
.726
.726
.825
.750
.825
.780
.825
.880
.800
.880
.832
.880
B
B
B
B
B
B
B
B
B
B
B
B
C
C
C
C
C
C
C
C
C
F
C
C
G
G
F
G
G
G
36
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DUR. AT
TAPPET LIFT AT
.200”
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.134
.137
.143
.143
.139
.138
.141
.147
.145
.152
.150
.750
.780
.825
.825
.780
.750
.780
.825
.780
.825
.780
.800
.832
.880
.880
.832
.800
.832
.880
.832
.880
.832
.850
.884
.935
.935
.884
.850
.884
.935
.884
.936
.884
.880
.915
.968
.968
.915
.880
.915
.968
.915
.969
.915
C
515 roller series is used primarily as an intake lobe on large
308
.0200
196
.171
.125
.773
.824
.876
.906
C
.876
.876
.876
.876
.906
.906
.906
.906
C
1.020
1.056
GH
.952
.986
GH
.799
.872
C
.816
.799
.876
.850
.876
.867
.876
.876
.867
.884
.884
.884
.850
.884
.845
.872
.906
.880
.906
.898
.906
.906
.898
.915
.915
.915
.880
.915
C
DEG.
104 DEG.
INTAKE
IN.
SEE PAGE 3
4841+
R-276/500
R-276/520
R-276/550
R-276/5501
R-277/520
R-278/500
R-278/520
R-278/550
R-280/520
R-280/5503
R-282/520
515
R-274/515
R-280/515
R-284/515
R-288/515
R-292/515
560
R-284/600
R-310/560
LH3
R-268/470
R-272/480
R-274/470
R-278/5151
R-280/5001
R-282/515
R-284/510
R-284/5152
R-286/515
R-288/510
R-296/5201
R-298/520
R-300/520
R-300/5001
R-302/5201
320
318
316
316
319
322
320
318
322
320
324
314
318
322
326
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0120
.0200
.0200
.0200
.0200
194
196
200
202
196
196
198
204
200
204
202
200
204
208
211
.160
.163
.171
.179
.163
.164
.168
.175
.172
.180
.177
.183
.192
.199
.208
.137
.145
.153
.161
.773
.773
.773
.773
.824
.824
.824
.824
560 roller series is used primarily on very large cubic inch drag
race engines. Recommended lash is .020" intake and .022' exhaust.
312
.0200
209
.203
.152
.900
.960
341
.0200
227
.246
.197
.840
.896
LH3 rollers, a collection of low harmonic lobes used in large cubic
inch drag race engines. Recommended lash will vary per profile.
299
.0200
188
.151
.113
.705
.752
303
306
312
311
316
318
318
320
322
330
332
334
334
336
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
192
194
194
199
198
202
201
202
206
213
214
216
209
218
.160
.159
.169
.179
.178
.184
.183
.188
.193
.213
.216
.221
.202
.226
.121
.135
.127
.137
.135
.141
.139
.143
.157
.166
.168
.173
.161
.178
.720
.705
.773
.750
.773
.765
.773
.773
.765
.780
.780
.780
.750
.780
.768
.752
.824
.800
.824
.816
.824
.824
.816
.832
.832
.832
.800
.832
F G
F G
G
G
G
F
F
G
G
G
F
C
C
C
D
E
C
F
E
F
F G
C
E F
E
F
F
F
E F
37
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.183
.192
.196
.187
.202
.197
.780
.780
.780
.750
.780
.750
.832
.832
.832
.800
.832
.800
.884
.884
.884
.850
.884
.850
.915
.915
.915
.880
.915
.880
SEE PAGE 3
LH3
R-304/520
R-308/520
R-310/520
R-312/500
R-312/520
R-318/5001
LH4
R-255/5002
R-258/5002
R-266/5002
R-270/5002
R-272/4171
R-272/5002
R-274/5002
R-276/5002
R-276/5201
R-278/4201
R-278/5002
R-278/5402
R-280/4401
R-280/5002
R-282/4201
R-282/5002
R-282/530
R-284/5002
R-284/5153
R-286/5002
R-286/5152
R-288/5002
R-288/5152
R-290/5002
R-290/5152
R-292/5002
R-292/5152
R-294/5002
R-294/5152
R-294/525
R-296/5151
R-298/5002
304
342
344
347
346
352
.0200
.0200
.0200
.0200
.0200
.0200
220
224
226
222
230
227
.231
.240
.244
.232
.250
.241
F
F
F
EF
FG
EF
LH4 roller series, a collection of low harmonic lobes used in large cubic inch engines that are
slightly more aggressive than the LH3. Recommended lash is .020" intake and .022" exhaust.
285
.0200
174
.125
.089
.750
.800
.850
.880
288
296
300
304
302
304
306
306
310
308
308
312
310
314
312
312
314
314
316
316
318
318
320
320
322
322
326
324
324
327
330
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
177
185
189
185
191
193
195
195
191
197
200
193
198
194
201
201
202
203
205
205
206
206
208
208
210
210
207
212
212
212
211
.130
.147
.156
.151
.160
.164
.169
.169
.163
.173
.179
.167
.178
.172
.182
.182
.187
.187
.192
.192
.197
.197
.202
.202
.207
.207
.198
.211
.212
.209
.207
.094
.108
.115
.113
.119
.123
.126
.126
.124
.130
.138
.128
.134
.132
.138
.138
.143
.143
.147
.147
.151
.151
.155
.155
.160
.160
.155
.164
.164
.164
.163
.750
.750
.750
.626
.750
.750
.750
.780
.630
.750
.810
.660
.750
.630
.750
.795
.750
.773
.750
.773
.750
.773
.750
.773
.750
.773
.750
.773
.788
.773
.750
.800
.800
.800
.667
.800
.800
.800
.832
.672
.800
.864
.704
.800
.672
.800
.848
.800
.824
.800
.824
.800
.824
.800
.824
.800
.824
.800
.824
.840
.824
.800
.850
.850
.850
.709
.850
.850
.850
.884
.714
.850
.918
.748
.850
.714
.850
.901
.850
.876
.850
.876
.850
.876
.850
.876
.850
.876
.850
.876
.893
.876
.850
.880
.880
.880
.734
.880
.880
.880
.915
.736
.880
.951
.774
.880
.736
.880
.933
.880
.906
.880
.906
.880
.906
.880
.906
.880
.906
.880
.906
.924
.906
.880
G K
K
G
F
K
C
F
F
B
F
G
C
F
G
C
F
F
K
C
F
E
F
F
F
F
F
E F G
F G
F
F
F
F
E
E
E
F
38
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.167
.178
.171
.172
.176
.180
.180
.184
.185
.188
.189
.202
.193
.193
.207
.197
.198
.203
.203
.207
.201
.201
.212
.214
.210
.218
.750
.795
.810
.750
.750
.810
.750
.810
.750
.810
.750
.795
.810
.750
.795
.810
.750
.750
.750
.750
.773
.750
.773
.803
.773
.810
.800
.848
.864
.800
.800
.864
.800
.864
.800
.864
.800
.848
.864
.800
.848
.864
.800
.800
.800
.800
.824
.800
.824
.856
.824
.864
.850
.901
.918
.850
.850
.918
.850
.918
.850
.918
.850
.901
.918
.850
.901
.918
.850
.850
.850
.850
.876
.850
.876
.910
.876
.918
.880
.933
.950
.880
.880
.950
.880
.950
.880
.950
.880
.933
.950
.880
.933
.950
.880
.880
.880
.880
.906
.880
.906
.942
.906
.950
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
LH4
R-300/5002
R-300/530
R-300/540
R-302/5002
R-304/5002
R-304/540
R-306/5002
R-306/540
R-308/5002
R-308/540
R-310/5002
R-310/530
R-310/540
R-312/5002
R-312/530
R-312/540
R-314/5002
R-316/500
R-316/5002
R-318/5002
R-318/515
R-320/5001
R-320/515
R-320/535
R-322/515
R-322/540
LHM
R-274/5202
R-284/5202
R-286/5202
R-286/530
R-288/530
R-330/540
LHP
R-276/525
R-278/525
332
330
333
334
336
337
338
339
340
341
342
340
343
344
342
345
346
348
348
350
351
354
352
353
355
354
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
213
218
215
215
217
219
219
221
221
223
223
229
225
225
230
227
227
229
229
231
229
228
232
234
232
236
.212
.227
.216
.217
.221
.225
.226
.230
.231
.234
.235
.251
.239
.239
.256
.243
.244
.248
.248
.252
.247
.245
.258
.260
.257
.266
F
E
G
F
F
G
F
G
F
G
F
F
G
F
F
G
F
E
F
F G
E
F
E
F
E F
D
LHM roller series, Low Harmonic designs for very large cubic inch applications. Minimizes
valve spring excitation in the RPM range of maximum engine output. Higher RPM potential
than the original LH. Recommended lash is .020" intake and .022" exhaust.
302
.0200
198
.175
.129
.780
.832
.884
.916
312
314
314
316
358
.0200
.0200
.0200
.0200
.0200
208
205
210
212
253
.200
.206
.206
.211
.301
.151
.156
.156
.160
.258
.780
.780
.795
.795
.810
.832
.832
.848
.848
.864
.884
.884
.901
.901
.918
.916
.916
.933
.933
.950
LHP roller series, Low Harmonic designs for high RPM 500 cu.in. applications.
Minimizes valve spring excitation in the RPM range of maximum engine output.
Higher RPM potential than the original LH. Recommended lash is .020".
306
.0200
195
.170
.127
.788
.840
.893
.924
308
.0200
197
.174
.131
.788
.840
.893
.924
G
F
F
E
E
F
F
F
39
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.135
.134
.138
.156
.163
.186
.810
.788
.788
.788
.788
.795
.864
.840
.840
.840
.840
.848
.918
.893
.893
.893
.893
.901
.950
.924
.924
.924
.924
.933
.979
1.014
E
.918
.979
.918
.979
1.02
.918
.918
.901
.918
.935
1.046
1.088
.918
1.037
1.046
.901
.918
.935
.986
1.046
.918
.935
.935
.952
.986
.893
.918
.918
.952
1.02
.918
.950
1.014
.950
1.014
1.056
.950
.950
.933
.950
.968
1.082
1.126
.950
1.074
1.082
.933
.950
.968
1.021
1.082
.950
.968
.968
.986
1.021
.924
.950
.950
.986
1.056
.950
E
SEE PAGE 3
LHP
R-278/540
R-280/525
R-282/525
R-290/525
R-296/525
R-306/530
5401
R-266/576
R-270/5401
R-270/576
R-276/5401
R-276/576
R-276/600
R-278/5401
R-278/5501
R-280/5301
R-280/5401
R-280/550
R-280/615
R-280/640
R-282/5401
R-282/610
R-282/615
R-284/530
R-284/5401
R-284/550
R-284/580
R-284/615
R-286/5401
R-286/550
R-286/5501
R-286/560
R-286/580
R-288/525
R-288/5401
R-292/5401
R-300/5601
R-304/600
R-306/5401
307
310
312
320
326
337
.0200
.0200
.0200
.0200
.0200
.0200
200
199
201
209
209
222
.180
.178
.182
.203
.198
.234
5401 roller series for large displacement engines with large journal
diameters. Recommended lash is .020" intake and .022" exhaust.
295
.0200
193
.161
.115
.864
.922
299
299
305
305
305
307
307
309
309
309
309
310
311
311
311
313
313
313
313
313
315
315
315
315
315
317
317
321
331
335
337
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
196
197
201
202
202
203
204
205
205
205
207
208
207
210
209
209
209
209
210
212
211
211
211
211
212
212
213
217
219
223
225
.169
.171
.183
.185
.185
.188
.189
.192
.192
.194
.197
.200
.198
.205
.203
.202
.203
.203
.205
.211
.207
.208
.208
.209
.210
.211
.212
.222
.227
.239
.242
.123
.124
.136
.137
.136
.140
.140
.144
.144
.145
.146
.147
.149
.153
.151
.154
.154
.154
.155
.158
.158
.159
.159
.159
.159
.163
.163
.172
.178
.189
.194
.810
.864
.810
.864
.900
.810
.810
.795
.810
.825
.923
.960
.810
.915
.923
.795
.810
.825
.870
.923
.810
.825
.825
.840
.870
.788
.810
.810
.840
.900
.810
.864
.922
.864
.922
.960
.864
.864
.848
.864
.880
.984
1.024
.864
.976
.984
.848
.864
.880
.928
.984
.864
.880
.880
.896
.928
.840
.864
.864
.896
.960
.864
F G
E F
F
E
E
F
G
E
G
E
G
G
F
G
F G
G
G
G
G
G
G
E F
F G
F
G
G
E F G
E
G
G
E
G
F
G
F
G
G
G
40
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.207
.201
.213
.220
.216
.212
.218
.213
.211
.215
.224
.213
.222
.222
.232
.225
.238
.810
.840
.900
.923
.795
.810
.825
.840
.840
.870
.900
.773
.825
.870
.870
.810
.810
.864
.896
.960
.984
.848
.864
.880
.896
.896
.928
.960
.824
.880
.928
.928
.864
.864
.918
.952
1.020
1.046
.901
.918
.935
.952
.952
.986
1.020
.876
.935
.986
.986
.918
.918
.950
.986
1.056
1.082
.933
.950
.968
.986
.986
1.021
1.056
.906
.968
1.021
1.021
.950
.950
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
5401
R-310/5401
R-310/5601
R-310/600
R-312/615
R-314/530
R-314/5401
R-314/550
R-314/560
R-314/5601
R-314/580
R-314/600
R-316/515
R-316/550
R-316/580
R-318/580
R-320/5401
R-324/5401
555
R-266/540
R-270/500
R-270/5402
R-272/5003
R-274/5601
R-274/5602
R-276/5402
R-276/555
R-276/5601
R-278/5251
R-278/555
R-278/600
R-280/5202
R-280/555
R-280/6401
R-282/5003
R-282/5402
R-282/555
R-282/565
R-284/5203
340
341
340
342
344
345
344
345
345
345
344
347
346
347
348
351
354
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
231
228
233
236
235
233
235
234
232
234
237
234
237
237
241
240
244
.256
.251
.266
.274
.262
.259
.266
.262
.261
.265
.277
.258
.271
.271
.282
.272
.284
F G
G
G
G
E
E
G
E
G
G
G
F
F
G
G
F
F G
555 roller series for engines with large cam journal diameters. This series provides
very good high speed stability. Will run to 10,000+ RPM with properly set up valve train.
Proven excellent performer. Recommended lash is .020" intake and .022" exhaust.
296
.0200
192
.156
.118
.810
.864
.918
.950
302
302
304
304
304
308
306
306
310
302
308
313
312
309
314
314
314
313
316
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
193
195
194
201
201
200
202
203
201
204
207
202
204
212
202
205
206
207
205
.158
.162
.162
.177
.178
.175
.181
.181
.177
.185
.192
.180
.182
.205
.181
.188
.188
.191
.188
.121
.125
.126
.137
.136
.137
.141
.142
.140
.145
.149
.142
.148
.159
.145
.149
.152
.156
.151
.750
.810
.750
.840
.840
.810
.833
.840
.788
.833
.900
.780
.833
.960
.750
.810
.833
.848
.780
.800
.864
.800
.896
.896
.864
.888
.896
.840
.888
.960
.832
.888
1.024
.800
.864
.888
.904
.832
.851
.918
.851
.952
.952
.918
.944
.952
.893
.944
1.020
.884
.944
1.088
.851
.918
.944
.961
.884
.880
.951
.880
.986
.986
.951
.977
.986
.924
.977
1.056
.915
.977
1.127
.880
.951
.977
.994
.915
E
C
E
G
F
G
G
G
G
G
E
G
G
G
G
H
F
G
G
G
E
41
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
DESIGN
LOBE SIZE
CODE
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
.152
.155
.158
.162
.161
.164
.165
.168
.172
.174
.172
.179
.177
.191
.189
.198
.197
.231
.788
.833
.780
.780
.750
.788
.750
.750
.788
.810
.750
.825
.756
.825
.780
.795
.833
.960
.840
.888
.832
.832
.800
.840
.800
.800
.840
.864
.800
.880
.816
.880
.832
.848
.888
1.024
.893
.944
.884
.884
.851
.893
.851
.851
.893
.918
.851
.935
.867
.953
.884
.901
.944
1.088
.924
.977
.915
.915
.880
.924
.880
.880
.924
.950
.880
.968
.898
.968
.915
.933
.977
1.126
SEE PAGE 3
555
R-284/525
R-284/555
R-288/5202
R-290/520
R-292/5001
R-292/525
R-294/5003
R-296/5001
R-296/5252
R-296/540
R-298/500
R-298/550
R-300/510
R-304/5502
R-306/5201
R-310/5302
R-310/5551
R-314/640
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
316
316
320
322
326
326
328
330
330
330
332
332
334
338
340
342
345
346
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
206
208
208
209
208
211
210
212
214
215
213
218
216
222
221
225
226
238
.189
.194
.196
.200
.197
.202
.201
.205
.210
.213
.208
.219
.214
.231
.227
.236
.247
.277
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
G
E
E
E
G
G
H
E
G
E
H
G
G
G
E
E
G
H
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.80
SEE PAGE 3
ENGINE OR APPLICATION SPECIFIC MECHANICAL ROLLER PROFILES
HC
R-252/390
R-254/347
R-254/365
R-256/366
R-256/3661
R-256/390
R-258/347
R-258/3471
R-258/3472
R-258/365
R-258/3651
R-258/390
R-260/3901
Originally designed for Hooters Cup type .625” lift rule, HC roller series. Also used in
other applications without lift rule. Recommended lash is .020" intake and .022" exhaust.
283
.0200
166
.116
.083
.585
.625
.624
.663
285
287
286
286
287
289
286
286
291
288
289
292
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
165
162
171
171
170
168
170
170
166
172
172
172
.118
.115
.124
.121
.124
.125
.126
.126
.121
.133
.127
.128
.093
.083
.098
.101
.089
.099
.102
.102
.089
.096
.092
.094
.521
.548
.549
.549
.585
.521
.521
.521
.548
.548
.585
.585
.555
.584
.586
.586
.625
.555
.555
.556
.584
.584
.625
.625
.555
.584
.586
.586
.624
.555
.555
.556
.584
.584
.624
.624
.590
.621
.622
.622
.663
.590
.590
.590
.621
.621
.663
.663
C
D
C
D
D
C
B
D
B
B
C
G
F
C
C
42
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
DESIGN
LOBE SIZE
CODE
1.50
1.60
1.70
1.80
SEE PAGE 3
ENGINE OR APPLICATION SPECIFIC MECHANICAL ROLLER PROFILES
HC
R-260/3903
R-262/347
R-262/365
R-262/385
R-262/3901
R-264/365
R-264/3651
R-264/378
R-264/3783
R-264/390
R-266/365
R-266/3651
R-266/366
R-266/390
R-266/417
R-268/365
R-268/366
R-268/390
R-270/390
R-272/385
R-272/390
R-274/390
R-274/417
R-278/390
R-280/3901
R-286/390
RLDP
R-242/353
R-248/353
R-254/353
R-260/353
RLS
R-232/382
R-240/3821
R-244/382
R-248/382
R-252/382
R-260/382
R-276/382
287
293
295
290
295
297
294
295
291
296
300
296
297
298
295
302
299
300
303
300
305
307
304
311
313
319
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
181
171
170
176
172
172
177
177
182
176
170
178
177
178
188
173
179
179
179
185
181
182
192
186
188
194
.141
.132
.129
.140
.129
.133
.143
.138
.147
.135
.134
.147
.139
.139
.151
.136
.143
.143
.143
.157
.147
.151
.161
.159
.162
.173
.110
.106
.095
.103
.095
.099
.107
.108
.117
.100
.101
.110
.112
.103
.120
.103
.116
.107
.108
.120
.111
.115
.131
.121
.125
.136
.585
.521
.548
.578
.585
.548
.548
.567
.567
.585
.548
.548
.549
.585
.626
.548
.549
.585
.585
.578
.585
.585
.626
.585
.585
.585
.624
.555
.584
.616
.624
.584
.584
.605
.605
.624
.584
.584
.586
.624
.667
.584
.586
.624
.624
.616
.624
.624
.667
.624
.624
.624
.664
.590
.621
.655
.663
.621
.621
.643
.643
.663
.621
.621
.622
.663
.709
.621
.622
.663
.663
.655
.663
.663
.709
.663
.663
.663
.703
.625
.657
.693
.702
.657
.657
.680
.681
.702
.657
.657
.659
.702
.751
.657
.659
.702
.702
.693
.702
.702
.751
.702
.702
.702
D
D
C
C
C
C
B
D
C
D
C
G
F
D
C
C
C
G
D
C
C
C
C
C
C
C
C
C
Chevrolet LS V8, RLDP mechanical roller series, stable lobes used in endurance
racing applications. Recommended lash is .020" intake and .022" exhaust.
273
.0200
157
.097
.074
.600
.635
279
286
292
.0200
.0200
.0200
162
165
169
.108
.122
.131
.083
.087
.096
.600
.600
.600
.635
.635
.635
Chevrolet LS1 V8, RLS mechanical roller series, used in high speed performance
applications. Recommended lash is .020" intake and .022" exhaust.
263
.0200
156
.091
.059
.649
.688
269
273
277
281
289
302
.0200
.0200
.0200
.0200
.0200
.0200
161
164
167
171
177
190
.102
.110
.117
.125
.140
.168
.068
.074
.081
.088
.102
.130
.649
.649
.649
.649
.649
.649
.688
.688
.688
.688
.688
.688
F
F
F
F
F
F
F
F
F
F
F
43
SPECIALIZED PROFILES
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
CAM
DYNAMICS
1.76
GRIND #
.447
.421
.456
.489
.542
.438
.466
.397
.496
.473
.502
.502
.435
.458
.479
.486
.502
.465
.503
731
735
730
726
750
738
751
734
727
724
797
725
721
788
711
729
793
722
659
PROFILES FOR FLAT TAPPET STOCK LIFT RULES APPLICATIONS
CD1
H-206/254
H-209/239
H-221/259
H-224/278
H-224/258
H-227/249
H-227/265
H-228/2254
H-228/282
H-235/269
H-236/285
H-236/285
H-242/247
H-242/260
H-242/272
H-242/2764
H-242/285
H-245/264
H-246/286
CD1 hydraulic and mechanical lifter Cam Dynamics stocker series—Non Dwell.
263
.0030
94
.048
.025
.381
.406
.432
266
.0030
89
.053
.031
.359
.382
.406
254
.0030
103
.069
.043
.389
.414
.440
285
.0030
118
.070
.043
.417
.445
.473
299
.0030
116
.072
.045
.462
.493
.524
284
.0030
108
.077
.052
.374
.398
.423
283
.0030
122
.079
.048
.398
.424
.451
284
.0030
104
.078
.050
.338
.361
.383
286
.0030
124
.079
.051
.423
.451
.479
290
.0030
124
.089
.061
.404
.430
.457
290
.0030
136
.092
.061
.428
.456
.484
293
.0030
131
.091
.061
.428
.456
.484
302
.0030
113
.096
.070
.371
.395
.420
296
.0030
134
.099
.069
.390
.416
.442
299
.0030
123
.093
.067
.408
.435
.462
298
.0030
136
.099
.069
.415
.442
.470
296
.0030
142
.101
.070
.428
.456
.484
307
.0030
123
.100
.071
.396
.422
.449
300
.0030
146
.108
.076
.429
.458
.486
H-247/278
H-248/240
H-248/296
H-248/307
H-249/264
H-250/238
H-250/278
H-250/286
H-250/300
H-252/2601
H-252/260
H-252/296
H-252/301
H-252/307
H-254/2764
305
302
302
302
308
307
304
304
306
306
308
306
306
306
314
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
137
136
150
152
130
104
148
150
145
150
144
154
154
155
137
.104
.110
.111
.111
.106
.100
.114
.114
.110
.118
.114
.118
.118
.118
.111
H-254/280
H-254/301
H-256/260
H-256/272
H-256/296
H-256/324
306
326
310
314
310
311
.0040
.0030
.0030
.0030
.0030
.0030
153
148
154
157
158
160
.120
.111
.124
.118
.124
.125
.075
.079
.079
.079
.078
.076
.082
.082
.080
.086
.084
.085
.083
.086
.420
.360
.444
.461
.396
.357
.417
.429
.450
.390
.390
.444
.452
.461
.445
.384
.474
.491
.422
.381
.445
.458
.480
.416
.416
.474
.482
.491
.473
.408
.503
.522
.449
.405
.473
.486
.510
.442
.442
.503
.512
.522
.489
.422
.521
.540
.465
.419
.489
.503
.528
.458
.458
.521
.530
.540
715
609
602
639
712
740
798
696
619
615
790
606
728
611
.083
.088
.081
.092
.101
.092
.092
.416
.420
.451
.390
.408
.444
.486
.443
.448
.482
.416
.435
.474
.518
.471
.476
.512
.442
.469
.503
.551
.488
.493
.530
.458
.479
.521
.570
723
684
625
617
679
618
736
44
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
CAM
DYNAMICS
1.76
GRIND #
.422
.493
.510
.530
.540
.419
.458
.489
.489
.521
.554
.436
.530
.530
.572
.458
.496
.501
.502
.521
.534
.458
.480
.517
.540
.521
.530
.554
.530
.480
.480
.493
.510
.554
.572
.521
.540
.574
.560
.560
610
648
604
626
612
719
622
713
660
620
794
720
791
640
607
799
698
716
628
637
714
796
789
768
613
603
627
601
792
616
272A
649
605
795
608
621
755
757
685
686
CD1
H-258/240
H-258/280
H-258/290
H-258/301
H-258/307
H-259/238
H-260/2601
H-260/278
H-260/2781
H-260/296
H-260/315
H-261/248
H-262/301
H-262/3011
H-262/325
H-264/260
H-264/282
H-264/2844
H-264/285
H-264/296
H-265/3034
H-266/260
H-266/273
H-266/294
H-266/307
H-268/296
H-268/301
H-268/315
H-270/301
H-272/273
H-272/273
H-272/280
H-272/290
H-272/315
H-272/325
H-274/296
H-276/307
H-278/326
F-246/318
F-252/318
312
312
312
330
312
319
314
319
312
314
314
323
316
334
316
320
322
320
318
318
322
320
320
318
320
322
340
322
324
326
328
326
326
326
326
328
330
332
282
288
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0040
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0120
.0120
145
156
158
151
161
110
154
142
158
162
164
124
164
152
167
152
166
152
163
165
162
161
160
157
168
169
158
172
172
172
162
170
172
175
177
174
180
180
155
159
.125
.126
.127
.117
.128
.109
.129
.120
.130
.130
.131
.114
.134
.122
.135
.131
.130
.128
.136
.137
.136
.138
.136
.133
.140
.143
.131
.144
.146
.150
.143
.148
.149
.151
.151
.152
.147
.158
.113
.123
.094
.095
.095
.086
.095
.086
.098
.092
.098
.098
.098
.089
.101
.092
.102
.102
.113
.100
.104
.105
.106
.107
.105
.104
.108
.111
.101
.111
.114
.118
.114
.117
.117
.118
.118
.121
.138
.126
.078
.088
.360
.420
.435
.451
.461
.357
.390
.417
.417
.444
.473
.372
.452
.452
.488
.390
.451
.427
.428
.444
.455
.390
.410
.441
.461
.444
.452
.473
.452
.410
.410
.420
.435
.473
.488
.444
.461
.489
.477
.477
.384
.448
.464
.482
.491
.381
.416
.445
.445
.474
.504
.397
.482
.482
.520
.416
.451
.455
.456
.474
.485
.416
.437
.470
.491
.474
.482
.504
.482
.437
.437
.448
.464
.504
.520
.474
.491
.522
.509
.509
.408
.476
.493
.512
.522
.405
.442
.473
.473
.503
.536
.422
.512
.512
.553
.442
.479
.483
.485
.503
.516
.442
.464
.500
.522
.503
.512
.536
.512
.464
.464
.476
.493
.536
.553
.503
.522
.554
.541
.541
45
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
CAM
DYNAMICS
1.76
GRIND #
.530
.546
.530
.540
.458
.539
.546
.540
.540
.569
.579
.502
.546
.530
.539
.546
.579
.607
.569
.607
.607
.634
.544
.579
.607
.651
625
695
626
644
622
260M
691
832
643
262M
631
628
692
627
268M
869
868
693
272M
636
694
687
276M
278M
867
688
CD1
F-254/301
F-254/3101
F-258/301
F-258/3071
F-260/260
F-260/3060
F-260/310
F-261/307
F-261/3071
F-262/3234
F-262/329
F-264/285
F-266/310
F-268/301
F-268/3060
F-272/3095
F-270/329
F-270/3451
F-272/3234
F-272/345
F-274/345
F-274/360
F-276/3090
F-278/3290
F-278/345
F-278/370
CD2
H-235/261
H-236/265
H-242/2600
H-242/265
H-244/307
H-250/307
H-252/2603
H-252/316
H-253/260
CD2 hydraulic and mechanical lifter Cam Dynamics stocker series—Dwell at Max Lift
289
.0030
131
.091
.064
.392
.418
.444
.459
302
.0030
132
.056
.056
.398
.424
.451
.466
300
.0030
135
.092
.063
.390
.416
.442
.458
298
.0030
138
.101
.070
.398
.424
.451
.466
297
.0030
150
.085
.096
.461
.491
.522
.540
304
.0030
155
.103
.096
.461
.491
.522
.540
302
.0030
154
.121
.088
.390
.416
.443
.458
302
.0040
161
.121
.087
.474
.506
.537
.556
309
.0030
148
.118
.088
.390
.416
.442
.458
H-253/307
H-254/272
H-254/2721
326
292
330
318
314
322
296
328
324
324
328
318
302
340
330
337
336
306
334
326
310
310
338
340
332
314
307
308
308
.0030
.0120
.0030
.0300
.0030
.0030
.0120
.0030
.0300
.0030
.0030
.0030
.0120
.0030
.0030
.0030
.0030
.0120
.0030
.0030
.0120
.0120
.0030
.0030
.0030
.0120
.0030
.0030
.0030
148
156
151
157
154
156
161
155
161
162
166
163
165
158
164
166
167
180
172
186
193
187
170
176
192
192
159
150
159
.111
.121
.117
.124
.129
.125
.133
.124
.129
.130
.132
.136
.140
.131
.137
.141
.138
.155
.145
.161
.161
.165
.149
.154
.171
.174
.108
.120
.125
.081
.093
.086
.093
.098
.095
.100
.094
.097
.098
.097
.104
.109
.101
.107
.111
.107
.121
.113
.124
.127
.129
.119
.123
.135
.138
.101
.088
.091
.451
.465
.451
.461
.390
.459
.465
.461
.461
.485
.494
.428
.465
.452
.459
.465
.494
.518
.485
.518
518
.540
.464
.494
.518
.555
.461
.408
.408
.482
.496
.482
.491
.416
.490
.496
.491
.491
.517
.526
.456
.496
.482
.490
.496
.526
.552
.517
.552
.552
.576
.494
.526
.552
.592
.491
.435
.435
.512
.527
.512
.522
.442
.520
.527
.522
.522
.550
.559
.485
.527
.512
.520
.527
.559
.587
.550
.587
.587
.612
.525
.559
.587
.629
.522
.462
.462
.540
.479
.479
742
752
754
741
747
748
654
666
744
746
753
676
46
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
CAM
DYNAMICS
GRIND #
PROFILES FOR FLAT TAPPET AND HYDRAULIC ROLLER STOCK LIFT RULES APPLICATIONS
CD2
H-256/242
H-256/2603
H-256/269
H-258/284
H-258/312
H-260/2603
H-260/2604
H-262/309
H-260/260
H-260/269
H-264/2603
H-264/2604
H-264/318
H-266/262
H-266/277
H-266/316
H-268/307
H-272/2733
H-276/273
H-276/2733
H-276/2734
H-276/3082
H-278/326
H-284/308
F-252/244
F-254/310
F-260/244
F-262/3101
F-264/244
F-268/310
F-276/258
.387
.416
.430
.454
.499
.416
.417
.491
.416
.430
.416
.417
.509
.419
.443
.506
.491
.437
.437
.437
.437
.493
.522
.493
.390
.496
.390
.496
.390
.496
.413
.411
.443
.457
.483
.530
.443
.443
.522
.442
.457
.443
.443
.541
.445
.471
.537
.522
.465
.464
.465
.635
.524
.554
.524
.415
.527
.415
.527
.415
.527
.439
.426
.458
.473
.500
.549
.458
.458
.540
.458
.473
.458
.458
.560
.461
.488
.556
.540
.481
.480
.481
.481
.542
.574
.542
.429
.546
.429
.546
.429
.546
.454
682
678
661
677
664
656
699
749
260A
673
663
700
665
683
662
667
756
655
600
679
701
276M
757
745
849
671
850
681
852
672
851
CD3
HR-238/300
HR-244/268
HR-244/278
HR-246/286
CD3 hydraulic roller Cam Dynamics stocker series—Non Dwell.
298
.0040
150
.097
.065
.450
.480
300
.0030
136
.104
.073
.402
.429
300
.0030
152
.105
.073
.417
.445
302
.0030
158
.114
.078
.429
.458
.510
.456
.473
.528
.472
.489
295HR
292HR
263HR
.486
.510
.486
.510
.503
.528
.503
.528
702HR
296HR
703HR
HR-246/300
HR-250/286
HR-250/300
308
306
306
312
308
310
310
315
316
310
314
314
314
318
316
316
322
322
332
328
328
328
326
338
286
305
294
313
298
319
310
306
306
306
.0030
.0030
.0030
.0030
.0040
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0040
.0030
.0030
.0040
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0030
.0120
.0030
.0120
.0030
.0120
.0030
.0120
.0040
.0030
.0040
146
160
160
166
166
162
166
166
148
164
166
170
174
163
169
175
172
177
165
184
186
184
180
191
151
164
159
172
163
178
179
156
162
165
.121
.129
.128
.133
.131
.134
.138
.120
.125
.134
.140
.144
.142
.138
.142
.145
.134
.154
.148
.164
.167
.161
.159
.162
.122
.126
.135
.140
.141
.151
.161
.111
.121
.121
.091
.095
.094
.098
.097
.101
.103
.112
.096
.101
.108
.110
.107
.107
.109
.111
.125
.121
.120
.131
.133
.127
.126
.152
.089
.091
.102
.105
.109
.116
.130
.077
.085
.084
.363
.390
.404
.426
.468
.390
.390
.461
.390
.404
.390
.390
.477
.393
.416
.474
.461
.410
.410
.410
.410
.462
.489
.462
.366
.465
.366
.465
.366
.465
.387
.450
.429
.450
.480
.458
.480
47
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
CAM
DYNAMICS
GRIND #
PROFILES FOR HYDRAULIC ROLLER STOCK LIFT RULES APPLICATIONS
CD3
HR-252/268
HR-252/290
HR-252/300
HR-252/3001
HR-252/316
HR-252/3161
HR-254/278
HR-254/310
HR-256/345
HR-258/300
HR-258/3001
HR-258/306
HR-258/310
HR-258/354
HR-260/268
HR-260/290
HR-264/340
HR-264/3401
HR-266/306
HR-266/3061
HR-266/320
HR-266/360
HR-268/3121
HR-270/345
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
308
306
312
306
308
308
310
310
312
318
312
314
314
314
316
314
320
320
326
320
322
322
324
326
.0030
.0040
.0040
.0040
.0040
.0040
.0030
.0040
.0030
.0040
.0040
.0040
.0040
.0030
.0030
.0040
.0040
.0040
.0040
.0040
.0040
.0030
.0040
.0030
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
142
151
162
153
159
164
150
160
173
156
158
178
164
177
150
158
174
179
164
167
173
184
188
188
.116
.116
.122
.116
.120
.124
.120
.123
.133
.125
.125
.140
.130
.138
.128
.128
.142
.147
.138
.138
.144
.153
.160
.161
.085
.084
.087
.084
.086
.087
.089
089
.096
.093
.098
.100
.096
.099
.097
.097
.107
.109
.106
.106
.110
.114
.119
.122
DUR. AT
TAPPET LIFT AT
.200”
IN.
104 DEG.
INTAKE
114 DEG.
EXHAUST
.402
.435
.450
.450
.474
.474
.417
.465
.518
.450
.450
.459
.465
.531
.402
.435
.510
.510
.459
.459
.480
.540
.468
.518
.429
.464
.480
.480
.506
.506
.445
.496
.552
.480
.480
.490
.496
.566
.429
.464
.544
.544
.490
.490
.512
.576
.499
.552
.456
.493
.510
.510
.537
.537
.473
.527
.587
.510
.510
.520
.527
.602
.456
.493
.578
.578
.520
.520
.544
.612
.531
.587
.472
.510
.528
.528
.556
.556
.489
.546
.607
.528
.528
.539
.546
.623
.472
.510
.598
.599
.538
.539
.563
.634
.549
.607
1.50
1.60
1.70
1.76
293HR
646HR
297HR
645HR
650HR
674HR
264HR
670HR
668HR
629HR
455HR
689HR
652HR
657HR
294HR
647HR
651HR
675HR
630HR
456HR
653HR
658HR
690HR
669HR
MINIMUM
TAPPET
DIAMETER
SEE PAGE 2
PROFILES FOR SPECIALTY OHV AND FLATHEAD APPLICATIONS
MF5
F-202/252
F-212/266
F-222/280
F-232/294
F-242/308
F-252/322
MF5 mechanical series for performance and racing applications on smaller
diameter lobes. Recommended lash is .016” intake and .018” exhaust.
240
.0160
96
.042
.023
.378
.403
.428
250
.0160
110
.055
.032
.399
.426
.452
260
.0160
123
.070
.043
.420
.448
.476
270
.0160
135
.086
.055
.441
.470
.500
280
.0160
146
.102
.070
.462
.493
.524
290
.0160
157
.119
.085
.483
.515
.547
.444
.468
.493
.517
.542
.800
.800
.800
.800
.800
.567
.800
48
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
MINIMUM
TAPPET
DIAMETER
1.76
SEE PAGE 2
.591
.616
.800
.800
PROFILES FOR SPECIALTY OHV AND FLATHEAD APPLICATIONS
MF5
F-262/336
F-272/350
VW1
F-230/328
F-240/335
F-250/3677
OHC1
F-210/305
F-220/320
F-230/340
F-240/360
F-250/380
F-260/400
300
310
.0160
.0160
168
179
.136
.153
.102
.119
.504
.525
.538
.560
.571
.595
VW1 mechanical series for VW Type 4 opposed-4, with .941” tappet diameter.
Recommended cold lash is .006” intake and .008” exhaust.
278
288
296
.0160
.0160
.0140
142
150
166
.082
.098
.121
.053
.066
.084
1.30
1.36
.426
.436
.478
.446
.456
.500
.941
.941
.941
OHC1 mechanical series for VW Type 1 opposed-4, with
1.000" tappet diameter. Recommended cold lash is .002”.
1.13
264
274
284
294
304
314
.0120
.0120
.0120
.0120
.0120
.0120
129
140
150
162
174
184
.053
.071
.089
.109
.129
.149
.026
.039
.053
.070
.089
.108
.345
.362
.384
.407
.429
.452
1.000
1.000
1.000
1.000
1.000
1.000
MF6
F-198/290
F-208/310
F-218/330
F-228/350
F-238/370
F-248/390
F-258/410
MF6 mechanical series for flathead engines with a minimum tappet diameter of .996”. Minimum design
base circle radius is .900” minus lobe lift. Recommended cold lash is .010” intake, and .014” exhaust.
238
.0080
117
.033
.012
.996
248
.0080
130
.050
.019
.996
258
.0080
141
.069
.033
.996
254
.0140
152
.089
.050
.996
264
.0140
162
.109
.069
.996
274
.0140
172
.129
.089
.996
284
.0140
183
.149
.109
.996
MF7
F-200/302
F-210/322
F-220/342
F-230/362
F-240/382
MF7 mechanical series for industrial engines used in tractor pulling competition
with a minimum tappet diameter of 1.100”. Recommended lash is .016” to .018”.
240
.0100
124
.037
.016
.453
.483
.513
.532
250
.0100
136
.054
.024
.483
.515
.547
.567
260
.0100
148
.074
.037
.513
.547
.581
.602
270
.0100
160
.096
.054
.543
.579
.615
.637
280
.0100
171
.119
.074
.573
.611
.649
.672
1.100
1.100
1.100
1.100
1.100
49
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
MECHANICAL ROLLER PROFILES FOR SPECIALTY OHV APPLICATIONS
MR3
R-200/302
R-210/322
R-220/342
R-226/354
R-230/362
R-236/374
R-240/382
R-250/402
MR4
R-192/380
R-200/375
R-208/385
R-210/390
R-212/395
R-212/405
R-214/370
R-214/380
R-220/405
R-224/380
R-224/425
R-226/380
R-230/420
R-232/380
R-234/390
R-236/429
R-240/435
R-250/450
TPR400
R-216/400
R-226/400
R-228/400
R-230/400
R-236/400
R-246/400
R-248/4001
R-250/4001
50
MR3 mechanical roller series for industrial engines used in tractor pulling competition
with a minimum journal size of 2.200” diameter. Recommended lash is .016” to .018”.
252
.0100
117
.040
.021
.453
.483
.513
.532
262
272
278
282
288
292
302
.0100
.0100
.0100
.0100
.0100
.0100
.0100
129
141
148
152
159
163
173
.053
.068
.078
.085
.096
.104
.125
.029
.038
.047
.053
.061
.068
.085
.483
.513
.531
.543
.561
.573
.603
.515
.547
.566
.579
.598
.611
.643
.547
.581
.602
.615
.636
.649
.683
.567
.602
.623
.637
.658
.672
.708
MR4 mechanical roller series for industrial engines used in tractor pulling competition
with a minimum journal size of 2.200” diameter. Recommended lash is .020” to .022”.
219
.0200
124
.029
.014
.570
.608
.646
.669
236
236
246
240
240
250
246
256
260
252
258
266
264
270
272
276
286
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
.0200
126
136
136
140
141
140
139
146
149
152
146
156
150
158
162
166
175
.041
.047
.054
.053
.053
.058
.056
.066
.073
.072
.072
.082
.081
.090
.092
.099
.120
.024
.029
.033
.033
.033
.035
.035
.041
.045
.047
.050
.052
.058
.058
.060
.066
.081
.563
.578
.585
.593
.608
.555
.570
.608
.570
.638
.570
.630
.570
.585
.644
.653
.675
.600
.616
.624
.632
.648
.592
.608
.648
.608
.680
.608
.672
.608
.624
.686
.696
.720
.638
.655
.663
.672
.689
.629
.646
.689
.646
.723
.646
.714
.646
.663
.729
.740
.765
.660
.678
.686
.693
.713
.651
.669
.713
.669
.748
.669
.739
.669
.686
.755
.766
.792
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
F
TPR400 mechanical roller series with .400" lobe lift, for industrial engines used in tractor pulling
competition with a minimum journal size of 2.200” diameter. Recommended lash is .020” to .022”.
F
252
.0200
142
.060
.037
.600
.640
.680
.704
262
264
266
272
282
284
286
.0200
.0200
.0200
.0200
.0200
.0200
.0200
151
153
155
160
169
171
172
.075
.078
.082
.092
.112
.116
.121
.048
.050
.052
.060
.075
.078
.082
.600
.600
.600
.600
.600
.600
.600
.640
.640
.640
.640
.640
.640
.640
.680
.680
.680
.680
.680
.680
.680
.704
.704
.704
.704
.704
.704
.704
F
F
F
F
F
F
F
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.50
1.60
1.70
1.76
DESIGN
LOBE SIZE
CODE
SEE PAGE 3
MECHANICAL ROLLER PROFILES FOR SPECIALTY OHV APPLICATIONS
TPR450
R-234/450
R-236/450
R-238/450
R-248/450
R-250/450
R-256/450
R-258/450
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
TPR450 mechanical roller series with .450” lobe lift, for industrial engines used in tractor pulling
competition with a minimum journal size of 2.200” diameter. Recommended lash is .020” to .022”.
F
270
.0200
160
.088
.058
.675
.720
.765
.792
272
274
284
286
292
294
.0200
.0200
.0200
.0200
.0200
.0200
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
IN.
162
164
174
175
181
183
.092
.095
.115
.120
.133
.138
.060
.053
.078
.081
.092
.095
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
.675
.675
.675
.675
.675
.675
.720
.720
.720
.720
.720
.720
.765
.765
.765
.765
.765
.765
.792
.792
.792
.792
.792
.792
GROSS VALVE LIFT WITH ZERO LASH
114 DEG.
EXHAUST
F
F
F
F
F
F
MINIMUM
FOLLOWER
DIAMETER
SEE PAGE 2
PROFILES FOR DIRECT ACTUATION FOLLOWER SOHC AND DOHC APPLICATIONS
OHC2
H-224/384
H-232/402
H-240/420
H-248/438
H-256/456
OHC2 hydraulic series for OHC engines using bucket style followers with a minimum
diameter of 1.308” and a minimum design base circle radius of 1.000” minus lobe lift.
268
.0040
160
.086
.042
.384
276
.0040
169
.106
.058
.402
284
.0040
178
.126
.076
.420
292
.0040
186
.146
.095
.438
300
.0040
195
.168
.115
.456
1.308
1.308
1.308
1.308
1.308
OHC3
H-192/325
H-212/395
H-222/430
H-232/430
H-232/460
H-242/480
H-252/480
H-262/480
OHC3 hydraulic series for OHC engines using bucket style followers with a
minimum diameter of 1.500” and a minimum design base circle radius of .700”.
232
.0040
126
.019
.007
.325
252
.0040
154
.059
.023
.395
262
.0040
164
.085
.038
.430
272
.0040
173
.111
.058
.430
272
.0040
176
.112
.059
.460
282
.0040
186
.141
.083
.480
292
.0040
195
.167
.109
.480
302
.0040
204
.191
.135
.480
1.500
1.500
1.500
1.500
1.500
1.500
1.500
1.500
OHC5
F-230/318
F-238/342
F-244/360
OHC5 mechanical series for OHC engines using bucket style followers with a minimum tappet diameter
of .960” and a base circle radius of .550”. Recommended cold lash is .008” intake, and .010” exhaust.
258
.0160
144
.089
.053
.318
.960
266
.0160
156
.106
.068
.342
.960
272
.0160
165
.118
.079
.360
.960
51
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
IN.
104 DEG.
INTAKE
114 DEG.
EXHAUST
MINIMUM
FOLLOWER
DIAMETER
SEE PAGE 2
OHC1
F-210/305
F-220/320
F-230/340
F-240/360
F-250/380
F-260/400
OHC1 mechanical series for OHC engines using bucket style followers
with a minimum diameter of 1.000”. Recommended cold lash is .012”.
264
.0120
129
.053
.026
.305
274
.0120
140
.071
.039
.320
284
.0120
150
.089
.053
.340
294
.0120
162
.109
.070
.360
304
.0120
174
.129
.089
.380
314
.0120
184
.149
.108
.400
OHC4
F-236/340
F-242/360
F-246/380
F-252/360
F-252/388
F-256/397
F-262/400
F-272/412
OHC4 mechanical series for OHC engines using bucket style followers with a minimum diameter of 1.020”
and a minimum design base circle radius of .510”. Recommended cold lash is .006” intake, and .010” exhaust.
284
.0052
156
.104
.065
.340
1.020
290
.0052
163
.115
.076
.360
1.020
294
.0052
170
.126
.083
.380
1.020
298
.0050
172
.134
.095
.360
1.020
298
.0052
178
.140
.097
.388
1.020
302
.0052
182
.148
.104
.397
1.020
308
.0052
186
.159
.119
.400
1.020
318
.0052
198
.179
.139
.412
1.020
OHC6
F-264/390
F-268/398
F-274/410
F-278/418
F-288/438
OHC6 mechanical series for OHC engines using bucket style followers with a minimum diameter of 1.020”
and a minimum design base circle radius of .510”. Recommended cold lash is .006” intake, and .010” exhaust.
306
.0120
184
.154
.115
.390
1.020
310
.0120
188
.162
.123
.398
1.020
316
.0120
194
.174
.134
.410
1.020
320
.0120
198
.181
.142
.418
1.020
330
.0120
208
.199
.163
.438
1.020
OHC7
F-240/380
F-260/420
OHC7 mechanical series for OHC engines using bucket style followers with a
minimum diameter of 1.100” and a minimum design base circle radius of .500”.
280
.0140
168
.114
.072
.380
300
.0140
188
.157
.113
.420
1.100
1.100
OHC8
F-206/310
F-216/330
F-226/350
F-236/370
F-246/390
F-256/410
F-266/430
F-276/450
F-286/470
minimum diameter of 1.125” and a minimum design base circle radius of .925”
Recommended cold lash is .006” intake, .008” exhaust. minus lobe lift.
250
.0050
128
.047
.019
.310
260
.0050
140
.065
.031
.330
270
.0050
152
.085
.046
.350
280
.0050
164
.107
.065
.370
290
.0050
176
.130
.086
.390
300
.0050
186
.153
.108
.410
310
.0050
196
.177
.131
.430
320
.0050
208
.200
.154
.450
330
.0050
218
.224
.178
.470
1.125
1.125
1.125
1.125
1.125
1.125
1.125
1.125
1.125
52
1.000
1.000
1.000
1.000
1.000
1.000
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
MINIMUM
FOLLOWER
DIAMETER
SEE PAGE 2
OHC9
F-258/450
F-268/470
minimum diameter of 1.180" and a minimum design base circle radius of .970”
minus lobe lift.. Recommended cold lash is .006” intake, and .008” exhaust.
300
.0040
194
.168
.119
.450
310
.0040
204
.190
.142
.470
1.180
1.180
OHC11
F-260/450
F-270/465
F-280/480
minimum diameter of 1.200” and a minimum design base circle radius of .970”
minus lobe lift. Recommended cold lash is .008” intake, and .010” exhaust.
292
.0100
200
.180
.130
.450
302
.0100
214
.204
.155
.465
312
.0100
219
.227
.179
.480
1.200
1.200
1.200
OHC12
F-222/408
F-232/428
F-242/448
F-252/468
F-284/492
OHC12 mechanical series for OHC engines using bucket style followers with
a minimum diameter of 1.220” and a minimum design base circle radius
of 1.150” minus lobe lift. Recommended cold lash is .018”.
270
.0140
157
.072
.045
.408
280
.0140
167
.095
.061
.428
290
.0140
176
.117
.078
.448
300
.0140
186
.143
.099
.468
332
.0140
220
.231
.182
.492
1.220
1.220
1.220
1.220
1.220
F-260/525
F-270/545
F-276/558
F-282/570
OHC13 mechanical series for OHC engines using bucket style followers with
a minimum diameter of 1.375” and a minimum design base circle radius
of 1.130” minus lobe lift. Recommended cold lash is .018”.
258
.0200
176
.116
.063
.432
308
.0140
200
.175
.122
.525
318
.0140
209
.201
.148
.545
324
.0140
215
.219
.165
.558
330
.0140
221
.238
.181
.570
1.375
1.375
1.375
1.375
1.375
OHC10
F-230/440
F-240/470
F-262/420
F-262/450
OHC10 mechanical miscellaneous profiles for OHC engines using bucket style followers of various
tappet diameters and lobe sizes. Contact the Crane Cams technical staff for recommendations.
292
.0140
168
.095
.053
.440
1.300
302
.0140
180
.121
.072
.470
1.300
300
.0100
197
.176
.129
.420
1.200
300
.0100
200
.181
.131
.450
1.200
OHC13
F-234/432 (.012"lash)
F-280/530
F-284/488
322
324
.0050
.0140
220
219
.233
.227
.178
.177
.530
.488
1.300
1.180
53
PROFILE CODE
DUR. AT .050” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
.200”
IN.
104 DEG.
INTAKE
114 DEG.
EXHAUST
MINIMUM
FOLLOWER
DIAMETER
SEE PAGE 2
ENGINE SPECIFIC PROFILES FOR DIRECT ACTUATION FOLLOWER SOHC AND DOHC APPLICATIONS
OHC14
F-206/366
F-210/374
F-214/382
F-218/390
F-226/410
F-236/435
F-246/460
Ford Zetec DOHC 2.0L 4-valve I-4, mechanical series. These lobes use a base
circle radius of .709”. Recommended lash is .006" intake and .010" exhaust. (223 prefix)
228
.0200
142
.046
.020
.366
232
.0200
146
.054
.024
.374
236
.0200
150
.063
.029
.382
240
.0200
154
.072
.033
.390
248
.0200
164
.090
.046
.410
258
.0200
174
.115
.068
.435
268
.0200
184
.139
.090
.460
1.181
1.181
1.181
1.181
1.181
1.181
1.181
OHC16
F-204/354
F-212/374
F-216/385
F-226/410
F-236/435
F-246/460
F-256/485
Ford Duratec DOHC 2.3L 4-valve I-4, mechanical series. These lobes use a base
circle radius of .650”. Recommended lash is .010" intake and .012" exhaust. (224 prefix)
224
.0200
140
.042
.017
.354
232
.0200
150
.068
.024
.374
238
.0200
154
.066
.030
.385
248
.0200
164
.090
.046
.410
258
.0200
174
.115
.068
.435
268
.0200
184
.139
.090
.460
278
.0200
194
.165
.115
.485
1.220
1.220
1.220
1.220
1.220
1.220
1.220
OHCHYU
H-202/341
H-216/370
Hyundai DOHC 2.7L 4-valve V6, hydraulic series. These lobes use a base circle radius of .709”.
236
.0060
136
.038
.011
.341
1.181
252
.0060
152
.068
.028
.370
1.181
OHC4AG
F-242/410
F-248/424
Toyota DOHC 1.6L 4-valve 4AG I-4, mechanical series. These lobes use a base
circle radius of .550”. Recommended lash is .008" intake and .010" exhaust.
268
.0200
173
.119
.075
.410
274
.0200
179
.133
.087
.424
1.100
1.100
OHC15
F-214/362
F-222/378
F-230/394
F-238/410
F-246/426
F-254/442
F-262/458
Toyota DOHC 3.0L 4-valve I-6, mechanical series. These lobes use a base circle
radius of .709”. Recommended lash is .008" intake and .012" exhaust. (705 prefix)
236
.0200
146
.061
.022
.362
244
.0200
154
.079
.039
.378
252
.0200
162
.097
.054
.394
260
.0200
170
.115
.071
.410
268
.0200
178
.133
.088
.426
276
.0200
186
.151
.105
.442
284
.0200
192
.169
.122
.458
1.093
1.093
1.093
1.093
1.093
1.093
1.093
54
PROFILE CODE
DUR. AT .050” /
VALVE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
IN.
DUR. AT
VALVE LIFT AT
.300”
VALVE LIFT TOP DEAD CENTER
104 DEG.
INTAKE
CAM LIFT
GROSS VALVE LIFT
WITH ZERO LASH
DESIGN
BASE CIRCLE
RADIUS
114 DEG.
EXHAUST
ENGINE SPECIFIC PROFILES FOR TRANSLATING FOLLOWER SOHC AND DOHC APPLICATIONS
Acura DOHC 1.8L 4-valve B18A1 I-4, mechanical series. Recommended
ACU
lash is .004" intake and .008" exhaust. (Crane Cams 101 prefix)
ACU-202/400INT
228
.0200
97
.041
.020
.224
ACU-206/400INT
232
.0200
99
.047
.023
.224
ACU-204/388EXH
242
.0200
94
.044
.025
.218
ACU-208/388EXH
246
.0200
95
.050
.027
.218
ACU-212/388EXH
250
.0200
97
.056
.031
.218
ACU-218/433
246
.0200
114
.067
.036
.240
ACU-226/453
254
.0200
125
.083
.047
.250
ACU-234/472
262
.0200
134
.101
.060
.260
.400
.400
.388
.388
.388
.433
.453
.472
0.551
0.551
0.551
0.551
0.551
0.551
0.551
0.551
GMHEC
GM-197/428
GM-201/440
GM-224/475
Chevrolet / GM DOHC 2.2L 4-valve Ecotec I-4, hydraulic series.
238
.0060
101
.039
.008
.252
242
.0060
106
.045
.011
.259
266
.0060
128
.090
.033
.280
.428
.428
.475
0.590
0.590
0.590
GMMEC
GM-236/520
GM-246/520
GM-250/502
GM-256/520
GM-266/520
GM-266/550
GM-280/540
GM-290/540
Chevrolet / GM DOHC 2.2L 4-valve Ecotec I-4, mechanical series. Recommended lash
is .007" intake and .009" exhaust, set between the follower and base circle.
261
.0200
139
.102
.063
.3067
.520
271
.0200
147
.126
.081
.3067
.520
275
.0200
148
.136
.089
.2960
.502
281
.0200
155
.152
.102
.3067
.520
291
.0200
163
.178
.126
.3067
.520
294
.0200
160
.167
.116
.3243
.550
308
.0200
169
.198
.149
.3180
.540
318
.0200
178
.223
.172
.3180
.540
Chrysler SOHC 2.0L 4-valve I-4, hydraulic roller series. Lobes designed for a base
CHR1
radius of .550” or less, and require Ferrea lash caps #C10008. (Crane 158 prefix)
CHR-196/335INT
242
.0060
60
.021
.216
.335
CHR-204/355INT
250
.0060
76
.031
.230
.355
CHR-216/355INT
262
.0060
80
.051
.230
.355
CHR-226/355INT
272
.0060
84
.072
.230
.355
CHR-232/400INT
280
.0060
108
.080
.245
.400
CHR-236/440INT
280
.0060
120
.091
.269
.440
CHR-200/315EXH
250
.0060
40
.020
.207
.315
CHR-212/345EXH
262
.0060
72
.031
.228
.345
CHR-226/345EXH
282
.0060
76
.047
.228
.345
CHR-230/400EXH
285
.0060
104
.052
.257
.400
0.590
0.590
0.590
0.590
0.590
0.590
0.590
0.590
0.591
0.583
0.583
0.583
0.550
0.542
0.591
0.585
0.585
0.550
55
PROFILE CODE
DUR. AT .050” /
VALVE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
VALVE LIFT AT
.300”
IN.
104 DEG.
INTAKE
CAM LIFT
GROSS VALVE LIFT
WITH ZERO LASH
DESIGN
BASE CIRCLE
RADIUS
114 DEG.
EXHAUST
CHR2
CHR-196/345
CHR-200/354
CHR-204/364
CHR-208/374
CHR-216/394
CHR-224/413
CHR-232/433
CHR-240/453
CHR-248/472
CHR-256/492
CHR-264/492
CHR-268/492
CHR-272/500
CHR-290/550
Chrysler DOHC 2.0-2.4L 4-valve I-4, hydraulic roller series. (Crane 180 and 193 prefix)
238
.0060
68
.033
.012
.198
.345
242
.0060
76
.038
.016
.204
.354
246
.0060
82
.044
.019
.210
.364
250
.0060
88
.050
.023
.216
.374
258
.0060
100
.064
.034
.228
.394
266
.0060
112
.078
.044
.239
.413
274
.0060
122
.096
.057
.251
.433
282
.0060
132
.114
.070
.264
.453
290
.0060
142
.134
.087
.275
.472
298
.0060
152
.154
.104
.287
.492
306
.0060
158
.175
.123
.287
.492
310
.0060
161
.185
.133
.287
.492
314
.0060
166
.196
.144
.292
.500
334
.0060
186
.244
.190
.3233
.550
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.579
0.573
0.567
0.540
CHR3
CHR-206/502
CHR-212/502
CHR-218/463
CHR-218/502
CHR-224/520
Chrysler SOHC 4.7L V8, hydraulic roller series. Regrind base circle
radius of .826”. Must use 99424-16 lash caps.
242
.0060
124
.044
.015
.271
248
.0060
128
.056
.022
.271
254
.0060
126
.070
.030
.251
254
.0060
134
.070
.030
.271
260
.0060
140
.085
.044
.280
.502
.502
.463
.502
.520
0.826
0.826
0.826
0.826
0.826
FOR1
FOR-222/410
FOR-232/435
FOR-242/460
Ford SOHC 2.0L I-4, mechanical series, using stock base circle size and
stock length valve, with no lash cap. Recommended lash is .008” intake, and
.010” , set between the follower and base circle. (Crane 14 prefix)
262
.0120
112
.079
.040
.253
.410
272
.0120
128
.103
.058
.267
.435
282
.0120
140
.130
.080
.282
.460
0.590
0.590
0.590
FOR2
FOR-264/510
FOR-274/535
FOR-284/560
Ford SOHC 2.0L I-4, mechanical series, using a .050” longer valve than stock
or a stock length valve with a .050” thick lash cap. Recommended lash is
.010”, set between follower and base circle. (Crane 14 prefix)
300
.0160
160
.179
.128
.314
.510
310
.0160
172
.208
.154
.326
.535
320
.0160
184
.237
.182
.336
.560
0.500
0.500
0.500
HFOR3
HFOR-220/454
HFOR-226/420
HFOR-230/479
HFOR-234/420
Ford SOHC 2.3L I-4, hydraulic series, using cast followers and stock hydraulic adjusters.Cams are
ground on the stock base circle size and use a stock length valve with no lash cap. (Crane 19 prefix)
270
.0060
123
.074
.037
.285
.454
0.590
272
.0060
120
.091
.046
.245
.420
0.590
280
.0060
135
.097
.054
.300
.459
0.590
280
.0060
126
.111
.062
.245
.420
0.590
56
PROFILE CODE
DUR. AT .050” /
VALVE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
VALVE LIFT AT
.300”
104 DEG.
INTAKE
IN.
CAM LIFT
GROSS VALVE LIFT
WITH ZERO LASH
DESIGN
BASE CIRCLE
RADIUS
114 DEG.
EXHAUST
HFOR3
HFOR-240/504
HFOR-254/420
288
298
.0060
.0060
148
132
.131
.142
.076
.097
.315
.245
.504
.420
0.590
0.590
HFOR-242/480EXH
Ford SOHC 2.3L I-4, hydraulic series, using cast followers and stock hydraulic
adjusters. Cams are ground on a reduced base circle requiring a .100” longer valve
than stock, or a stock length valve with a .100” thick lash cap. (Crane 19 prefix)
278
.0060
133
.109
.061
.284
.460
286
.0060
143
.130
.078
.295
.480
0.545
0.545
FOR5
FOR-254/485
FOR-264/510
FOR-268/520
FOR-274/460
FOR-274/535
FOR-284/560
Ford SOHC 2.3LI-4,mechanical series, using cast followers and a .100” longer
valve than stock,or a stock length valve with a .100” thick lash cap. Recommended
lash is .010”, set between follower and base circle.(Crane 19 prefix)
290
.0160
148
.152
.103
.279
.485
300
.0160
160
.179
.128
.293
.510
304
.0160
165
.191
.138
.2975
.520
312
.0160
150
.165
.123
.283
.460
310
.0160
172
.208
.154
.306
.535
320
.0160
184
.237
.182
.319
.560
0.500
0.557
0.500
0.525
0.545
0.533
HFOR6
RFOR-214/420
RFOR-226/420
RFOR-234/420
RFOR-234/450
RFOR-242/480
RFOR-250/510
Ford SOHC 2.3L I-4, hydraulic roller series, using stock roller followers and an 8620 steel camshaft.
Valve train is based on hydraulic adjusters and a stock-length Ford valve. (Crane 19 prefix)
252
.0060
112
.061
.028
.227
.420
0.590
274
.0060
119
.087
.047
.228
.420
0.590
282
.0060
124
.106
.060
.228
.420
0.590
282
.0060
131
.106
.060
.243
.450
0.590
290
.0060
142
.127
.076
.259
.480
0.590
298
.0060
152
.148
.094
.274
.510
0.590
FOR7
RFOR-244/536
RFOR-252/560
RFOR-256/572
RFOR-260/584
RFOR-264/596
RFOR-268/608
RFOR-272/620
RFOR-276/632
RFOR-284/656
RFOR-292/680
RFOR-296/692
Ford SOHC 2.3L I-4, mechanical roller series, using stock roller followers and 8620 steel
camshafts. Valve train geometry is based on a 4.900” length valve. Recommended lash is
.010” intake and .012” exhaust, set between roller and base circle. (Crane 19 prefix)
276
.0220
145
.118
.074
.298
.536
284
.0220
154
.140
.092
.311
.560
288
.0220
161
.153
.101
.317
.572
292
.0220
163
.162
.110
.323
.584
296
.0220
170
.176
.120
.330
.596
300
.0220
171
.185
.130
.336
.608
304
.0220
178
.202
.141
.342
.620
308
.0220
180
.210
.151
.349
.632
316
.0220
188
.235
.174
.361
.656
324
.0220
196
.261
.198
.374
.680
328
.0220
200
.275
.210
.380
.692
FOR4
HFOR-234/460INT
0.500
0.500
0.500
0.500
0.500
0.500
0.500
0.500
0.500
0.500
0.500
57
PROFILE CODE
DUR. AT .050” /
VALVE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
VALVE LIFT AT
.300”
IN.
104 DEG.
INTAKE
CAM LIFT
GROSS VALVE LIFT
WITH ZERO LASH
DESIGN
BASE CIRCLE
RADIUS
114 DEG.
EXHAUST
HR2V
HR-218/500
HR-218/550
HR-228/500
HR-228/550
HR-230/575
HR-234/500
HR-234/550
HR-234/575
HR-236/600
HR-238/575
HR-242/575
HR-242/600
Ford SOHC 4.6–5.4L 2-valve V8, hydraulic roller series. (Crane 37 prefix)
254
.0060
133
.072
.032
.274
254
.0060
139
.072
.032
.300
264
.0060
140
.097
.050
.274
264
.0060
146
.098
.050
.300
266
.0060
151
.104
.054
.313
270
.0060
144
.114
.062
.274
270
.0060
151
.116
.063
.300
270
.0060
154
.116
.063
.313
272
.0060
158
.122
.067
.326
274
.0060
157
.124
.072
.313
278
.0060
161
.141
.082
.313
278
.0060
163
.142
.082
.326
.500
.550
.500
.550
.575
.500
.550
.575
.600
.575
.575
.600
0.947
0.947
0.947
0.947
0.947
0.947
0.947
0.947
0.947
0.947
0.947
0.947
HR2VH
HR-212/550
HR-216/565
HR-220/580
HR-224/595
HR-228/610
HR-232/625
HR-236/625
HR-240/625
Ford SOHC 4.6–5.4L 2-valve V8, hydraulic roller high lift series. (Crane 37 prefix)
248
.0060
134
.058
.024
.300
.550
252
.0060
138
.067
.029
.308
.565
256
.0060
143
.077
.036
.315
.580
260
.0060
147
.087
.042
.323
.595
264
.0060
152
.098
.050
.331
.610
268
.0060
156
.110
.058
.339
.625
272
.0060
160
.122
.067
.339
.625
276
.0060
163
.135
.077
.339
.625
0.947
0.947
0.947
0.947
0.947
0.947
0.947
0.947
HR3V
HR-208/468
HR-216/492
HR-224/516
HR-228/528
HR-236/552
HR-248/576
HR-252/600
256
.0060
116
.050
.025
.2293
.468
264
.0060
125
.064
.033
.2406
.492
272
.0060
134
.080
.044
.2519
.516
276
.0060
139
.088
.050
.2575
.528
284
.0060
147
.107
.064
.2687
.552
292
.0060
155
.128
.080
.2799
.576
300
.0060
163
.151
.097
.2910
.600
0.886
0.886
0.886
0.886
0.886
0.886
0.886
HR3VL
HR-218/480
HR-224/480
HR-230/480
HR-242/480
Ford SOHC 4.6–5.4L 3-valve V8, hydraulic roller series for restricted lift rules. (Crane 39 prefix)
266
.0060
124
.067
.036
.2350
.480
0.886
272
.0060
128
.079
.044
.2350
.480
0.886
278
.0060
133
.092
.053
.2350
.480
0.886
291
.0060
139
.117
.074
.2350
.480
0.886
HR2V
HR-218/500
HR-228/500
HR-234/500
Ford SOHC 4.6–5.4L 4-valve V8, hydraulic roller series. (Crane 40 prefix)
254
.0060
133
.072
.032
.274
264
.0060
140
.097
.050
.274
270
.0060
144
.114
.062
.274
58
.500
.500
.500
0.947
0.947
0.947
PROFILE CODE
DUR. AT .050” /
VALVE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
IN.
DUR. AT
VALVE LIFT AT
.300”
104 DEG.
INTAKE
CAM LIFT
GROSS VALVE LIFT
WITH ZERO LASH
DESIGN
BASE CIRCLE
RADIUS
114 DEG.
EXHAUST
HR4V
HR-246/575
HR-254/510
HR-260/540
282
.0060
164
.154
.093
.313
.575
294
.0060
159
.164
.108
.2791
.510
300
.0060
168
.184
.125
.2947
.540
0.947
0.947
0.947
Honda SOHC 1.6L 4-valve D16A6 I-4, mechanical series.
Recommended lash is .008" intake and .010" exhaust. (Crane 251 prefix)
226
.0200
91
.037
.019
.236
232
.0200
98
.047
.023
.242
242
.0200
114
.065
.032
.260
228
.0200
89
.040
.020
.201
234
.0200
96
.050
.024
.206
244
.0200
112
.070
.035
.220
.384
.394
.425
.376
.386
.416
0.610
0.610
0.610
0.629
0.629
0.629
Honda SOHC VTEC 4-valve D16Y8 I-4, mechanical series.
HON2
HON-186/319INT
214
.0200
44
.024
.200
HON-190/327INT
218
.0200
53
.028
.205
HON-224/423INT
258
.0200
115
.077
.259
HON-228/433INT
262
.0200
120
.085
.264
HON-232/443INT
266
.0200
125
.094
.270
HON-232/453INT
254
.0200
131
.102
.275
HON-210/386EXH
238
.0200
96
.096
.214
HON-218/406EXH
246
.0200
107
.107
.224
HON-234/445EXH
262
.0200
128
.128
.244
.319
.327
.423
.433
.433
.453
.386
.406
.445
0.630
0.630
0.630
0.630
0.630
0.630
0.646
0.646
0.646
Honda DOHC VTEC 4-valve B16A I-4, mechanical series.
216
.0200
—
.024
.016
.145
205
.0200
—
.018
.010
.199
222
.0200
—
.031
.018
.1947
215
.0200
40
.026
.012
.211
232
.0200
30
.040
.022
.207
225
.0200
43
.038
.018
.211
225
.0200
62
.038
.018
.224
235
.0200
78
.053
.026
.236
245
.0200
83
.071
.038
.235
254
.0200
121
.096
.053
.272
260
.0200
132
.111
.065
.281
266
.0200
138
.127
.077
.289
272
.0200
145
.143
.091
.297
278
.0200
153
.160
.106
.306
284
.0200
153
.172
.121
.297
284
.0200
160
.177
.122
.315
.210
.295
.288
.315
.307
.315
.332
.355
.354
.425
.441
.457
.472
.488
.472
.504
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
0.581
HON1
HON-200/384INT
HON-206/394INT
HON-216/425INT
HON-202/376EXH
HON-208/386EXH
HON-218/416EXH
HON3
HON-180/210
HON-180/295
HON-190/288
HON-190/315
HON-200/307
HON-200/315
HON-200/335
HON-210/355
HON-220/354
HON-230/425
HON-236/441
HON-242/457
HON-248/472
HON-254/488
HON-260/472
HON-260/504
59
PROFILE CODE
DUR. AT .050” /
VALVE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
VALVE LIFT AT
.300”
IN.
104 DEG.
INTAKE
CAM LIFT
GROSS VALVE LIFT
WITH ZERO LASH
DESIGN
BASE CIRCLE
RADIUS
114 DEG.
EXHAUST
RHON
RHON-224/425
RHON-230/441
RHON-236/457
RHON-242/472
RHON-248/488
RHON-254/504
RHON-260/504
RHON-266/520
RHON-272/520
RHON-278/536
Honda DOHC 4-valve B16A I-4, mechanical series. Recommended lash is .006" intake and
.008" exhaust. Use 8620 steel camshaft and Ferrea roller followers. (Crane 253 prefix)
248
.0200
114
.077
.044
.277
.425
254
.0200
122
.090
.053
.287
.441
260
.0200
130
.102
.063
.297
.457
266
.0200
137
.116
.074
.307
.472
272
.0200
144
.131
.086
.317
.488
278
.0200
151
.146
.098
.326
.504
284
.0200
156
.162
.111
.326
.504
290
.0200
163
.181
.128
.336
.520
296
.0200
168
.194
.140
.336
.520
302
.0200
174
.212
.156
.347
.536
0.581
0.581
0.581
0.581
0.571
0.561
0.561
0.551
0.551
0.541
Honda DOHC VTEC 2.0L 4-valve K20 I-4, mechanical street series.
HK20S
Recommended valve lash is .009" intake and .012" exhaust. (Crane 254 prefix)
RHON-206/374INT
233
.0200
87
.047
.2168
.374
RHON-240/410INT
266
.0200
120
.109
.2371
.410
RHON-258/524INT
284
.0200
157
.151
.3012
.524
RHON-262/536INT
288
.0200
161
.162
.3080
.536
RHON-266/548INT
292
.0200
166
.173
.3147
.548
RHON-206/374EXH
233
.0200
87
.024
.2160
.374
RHON-232/360EXH
258
.0200
93
.056
.2083
.360
RHON-254/500EXH
276
.0200
147
.093
.2842
.400
RHON-254/512EXH
280
.0200
152
.102
.2893
.512
RHON-258/524EXH
284
.0200
157
.111
.2970
.524
0.561
0.561
0.561
0.561
0.561
0.561
0.561
0.561
0.561
0.561
Honda DOHC VTEC 2.0L 4-valve K20 I-4, mechanical race series.
HK20R
Recommended valve lash is .009" intake and .012" exhaust. (Crane 254 prefix)
RHON-258/545INT
286
.0200
157
.153
.3086
.545
RHON-276/550INT
304
.0200
172
.198
.3114
.550
RHON-280/570INT
308
.0200
176
.206
.3224
.570
RHON-284/615INT
308
.0200
190
.239
.3518
.615
RHON-292/640INT
317
.0200
198
.267
.3657
.640
RHON-260/5041EXH
288
.0200
150
.105
.2831
.5041
RHON-272/5201EXH
300
.0200
163
.132
.2915
.5201
RHON-276/535EXH
304
.0200
167
.142
.2994
.535
RHON-284/615EXH
309
.0200
190
.179
.3447
.615
0.561
0.561
0.561
0.561
0.561
0.561
0.561
0.561
0.561
MIT
MIT-200/384
MIT-204/394
MIT-208/404
Mitsubishi DOHC 2.0L 4-valve 4G63 I-4 and the
EVO VIII DOHC I-4, hydraulic roller series. (Crane 435 and 440 prefix)
240
.0060
90
.032
.019
.221
244
.0060
96
.038
.023
.227
248
.0060
102
.045
.027
.233
.384
.394
.404
0.591
0.591
0.591
60
PROFILE CODE
DUR. AT .050” /
VALVE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
VALVE LIFT AT
.300”
104 DEG.
INTAKE
IN.
CAM LIFT
GROSS VALVE LIFT
WITH ZERO LASH
DESIGN
BASE CIRCLE
RADIUS
114 DEG.
EXHAUST
MIT
MIT-216/424
MIT-224/444
MIT-232/464
MIT-240/484
.424
.444
.464
.484
0.591
0.591
0.591
0.591
CHR2
CHR-196/345
CHR-200/354
CHR-204/364
CHR-208/374
CHR-216/394
CHR-224/413
CHR-232/433
CHR-240/453
CHR-248/472
CHR-256/492
CHR-264/492
CHR-268/492
CHR-272/500
CHR-290/550
Mitsubishi DOHC 4-valve 420A I-4, hydraulic roller series. (Crane 431 prefix)
238
.0060
68
.033
.012
.198
.345
242
.0060
76
.038
.016
.204
.354
246
.0060
82
.044
.019
.210
.364
250
.0060
88
.050
.023
.216
.374
258
.0060
100
.064
.034
.228
.394
266
.0060
112
.078
.044
.239
.413
274
.0060
122
.096
.057
.251
.433
282
.0060
132
.114
.070
.264
.453
290
.0060
142
.134
.087
.275
.472
298
.0060
152
.154
.104
.287
.492
306
.0060
158
.175
.123
.287
.492
310
.0060
161
.185
.133
.287
.492
314
.0060
166
.196
.144
.292
.500
334
.0060
186
.244
.190
.3233
.550
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.591
0.579
0.573
0.567
0.540
PORLD
POR-230/430
POR-238/444
POR-248/462
POR-256/476
POR-266/494
POR-274/508
POR-284/526
Porsche 911 and 930 SOHC opposed-6, mechanical series, using standard rocker
arms, with 49 mm diameter cam journals. Recommended cold lash is .004".
270
.0120
.2890
.430
278
.0120
.2983
.444
288
.0120
.3101
.462
296
.0120
.3193
.476
306
.0120
.3312
.494
314
.0120
.3423
.508
324
.0120
.3542
.529
0.624
0.624
0.624
0.624
0.624
0.624
0.624
TOY
T20-214/416
T20-224/430
T20-234/444
T20-244/458
T20-254/472
T20-264/430
Toyota 20R-22R SOHC I-4, mechanical series, using cast rocker arms and stock length
valves. Recommended lash is .010" intake and .012" exhaust. (Crane 704 prefix)
262
.0100
110
.062
.029
.269
.416
272
.0100
120
.083
.043
.278
.430
282
.0100
130
.107
.061
.287
.444
292
.0100
140
.133
.083
.296
.458
302
.0100
152
.160
.107
.305
.472
304
.0100
150
.179
.130
.282
.430
0.706
0.701
0.697
0.692
0.688
0.688
256
264
272
280
.0060
.0060
.0060
.0060
112
122
132
142
.060
.077
.096
.117
.037
.048
.062
.077
.245
.256
.268
.280
61
HARLEY DAVIDSON® V2 APPLICATIONS
PROFILE CODE
DUR. AT .053” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
. 200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.60
HARLEY DAVIDSON® EVOLUTION V2 HYDRAULIC ROLLER SERIES
HEV490
HEV-226/3064
HEV-236/3064
HEV-242/3064
HEV-252/3064
270
280
286
296
.014
.014
.014
.014
136
144
147
153
.077
.094
.104
.118
.053
.066
.075
.090
.490
.490
.490
.490
HEV550
HEV-226/344
HEV-236/344
270
286
.014
.014
140
148
.074
.090
.053
.065
.550
.550
HEV-246/344
HEV-254/344
HEV-256/344
298
306
311
.014
.014
.014
156
163
169
.104
.118
.131
.077
.088
.098
.550
.550
.550
HEV581
HEV-236/363
HEV-240/363
HEV-248/363
HEV-252/363
286
290
298
302
.014
.014
.014
.014
149
153
160
165
.090
.097
.110
.117
.065
.070
.082
.087
.581
.581
.581
.581
HEV600
HEV-246/375
HEV-254/375
HEV-260/375
HEV-262/375
HEV-265/375
HEV-266/375
296
304
310
314
317
316
.014
.014
.014
.014
.014
.014
160
167
172
173
175
177
.107
.121
.132
.132
.137
.142
.079
.091
.100
.100
.104
.110
.600
.600
.600
.600
.600
.600
HEV630
HEV-262/394
HEV-265/394
HEV-270/394
HEV-276/394
308
311
316
322
.014
.014
.014
.014
183
185
190
195
.147
.153
.163
.174
.108
.113
.123
.134
.630
.630
.630
.630
HEV650
HEV-254/406
HEV-266/406
HEV-278/406
HEV-286/406
304
316
330
338
.014
.014
.014
.014
171
186
190
197
.122
.145
.163
.178
.090
.109
.126
.140
.650
.650
.650
.650
HEV680
HEV-262/425
HEV-265/425
314
317
.014
.014
175
178
.132
.137
.100
.105
.680
.680
62
1.70
HARLEY DAVIDSON® V2 APPLICATIONS
PROFILE CODE
DUR. AT .053” /
LOBE LIFT
ADVERTISED DUR.
AT TAPPET LIFT
DEG.
DUR. AT
TAPPET LIFT AT
. 200”
104 DEG.
INTAKE
IN.
114 DEG.
EXHAUST
1.60
1.70
HARLEY DAVIDSON® TWIN-CAM 88 HYDRAULIC ROLLER SERIES
HTC505
HTC-220/306
HTC-226/306
HTC-236/306
HTC-242/306
HTC-252/306
255
261
271
277
287
.0200
.0200
.0200
.0200
.0200
129
134
141
145
152
.068
.077
.092
.102
.118
.044
.051
.063
.071
.086
.505
.505
.505
.505
.505
HTC538
HTC-254/326
289
.0200
160
.114
.090
.538
HTC570
HTC-240/3456
HTC-248/3456
HTC-252/3456
HTC-262/3456
275
283
287
297
.0200
.0200
.0200
.0200
153
159
162
170
.099
.113
.119
.136
.070
.081
.087
.103
.570
.570
.570
.570
HTC600
HTC-254/3637
HTC-260/3637
HTC-266/3637
290
296
302
.0200
.0200
.0200
166
172
177
.121
.132
.143
.088
.097
.107
.600
.600
.600
HTC619
HTC-246/375
HTC-254/375
296
304
.0140
.0140
160
167
.107
.121
.079
.091
.619
.619
HTC660
HTC-246/4001
HTC-254/4001
HTC-258/4001
HTC-260/4001
HTC-266/400
281
289
291
295
301
.0200
.0200
.0200
.0200
.0200
164
171
175
177
183
.111
.126
.133
.137
.149
.079
.091
.098
.101
.100
.660
.660
.660
.660
.660
HTC670
HTC-270/406
HTC-274/406
305
309
.0200
.0200
186
190
.156
.164
.119
.126
.670
.670
63
CAMSHAFT RECOMMENDATION FORM
PERSONAL INFORMATION
NAME:
EMAIL ADDRESS:
ADDRESS:
TELEPHONE NUMBER:
FAX:
TYPE OF CAM INTERESTED IN:
HYDRAULIC
HYDRAULIC ROLLER
MECHANICAL
MECHANICAL ROLLER
VEHICLE INFORMATION
MAKE
YEAR:
MODEL:
WEIGHT:
COMPUTER CONTROLLED
EMISSIONS CONTROLLED WITHOUT COMPUTER
NON-EMISSIONS CONTROLLED
VEHICLE USE
STREET
STREET/STRIP
OFF ROAD
TOWING
MARINE USE
HULL TYPE:
LENGTH:
DRIVE:
JET
EXHAUST SYSTEM:
BRAND:
DOES EXHAUST EXIT:
ABOVE WATER LINE
WEIGHT:
PROP
EXPLAIN:
WET
DRY
BELOW WATER LINE
OPTIONS
RPM POWER RANGE DESIRED:
ENGINE IDLE CHARACTERISTICS:
1000–4000
1500–4500
2000–5000
3000–6000
3500–6500
4000–7000
SMOOTH
CHOPPY
ROUGH
2500–5500
NOTE: COMPUTER CONTROLLED VEHICLES MUST USE SMOOTH IDLE CAMSHAFTS ONLY.
ENGINE INFORMATION
MAKE:
YEAR:
CUBIC INCHES:
PORTED:
NUMBER OF CYLINDERS:
COMPRESSION RATIO:
YES
ROCKER ARM TYPE:
CYLINDER HEAD TYPE:
VALVE SIZE: INT.
NO
STOCK
EXH.
ROCKER RATIO: INT.
ROLLER
INTAKE MANIFOLD TYPE:
CARBURETOR:
TYPE OF INJECTION:
SPEED DENSITY
NITROUS OXIDE SYSTEM:
MASS AIR
SUPERCHARGER TYPE:
TURBOCHARGER TYPE:
EXH.
SPECIAL
DRIVE RATIO:
P.S.I. BOOST:
CRANKING COMPRESSION P.S.I.:
TRANSMISSION MODEL:
STANDARD
AUTOMATIC
CONVERTER STALL SPEED:
REAR GEAR RATIO:
CRUISE RPM @ 60 MPH:
TIRE DIAMETER/SIZE:
CAM NOW USED:
PART NUMBER:
HYDRAULIC
LIFT: INT.
HYDRAULIC ROLLER
EXH.
LOBE SEPARATION:
64
MECHANICAL
AUTOMATIC WITH OVERDRIVE
MECHANICAL ROLLER
DURATION @.050: INT.
IMPROVEMENT NEEDED:
LOW END TORQUE
EXH.
UPPER RPM POWER
CONTACT US
Technical Support: 866-388-5120, 8:00 am–5:00 pm EST
Fax: 386-236-9983
Web: www.cranecams.com
Email: [email protected], [email protected]
Facebook: www.facebook.com/cranecams
© Crane
PP1112A
Cams | 1830 Holsonback Drive, Daytona Beach, FL 32117

cam lobe profile catalog

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