1981 IMSA GTP chassis rules

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SA CODE
, COMPETITION
RULES
OF THE
INTERNATIONAL
MOTOR SPORTS
ASSOCIATION, Inc.
P.O. Box 3485
Bridgepoh Conn. OW05
(209) 396-2116
1981
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PREFACE
To enhance the satetv
~ of oarticinants
, ~,~ and
. soectatars at IMSAsan~t10neda~tomoboreraceland to pro" detor me order y conauctot
events reqvoresadherencetotneserules. tho IMSA CODE, nereonafter
set IoRh. All IMSA license holdersand members agree tocomply with
these IMSA rules, as they may be amended from time to time, which
rules. as interpreted by IMSA, govern the conduct and organization of
811 IMSA-sanctioned events. The 1981 IMSA CODE supersedes all
previous editlons of the IMSA CODE as well as all amendments
thereto, and shall remain in farce and effect except as amended as
provided herein, until superseded by publication of the next edition of
the IMSA CODE.
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CONTENTS
1
I
The IMSA CODE sets forth t h e rules and standards
lverning lMSAcompetition.The1981 IMSACODEbecomes
fective on the date of its publication . These rulesgovern the
~nction.organization and conduct of IMSA events. the
igibility of cars and competitors. and the standing
regulations of IMSA Series.
The 1981 IMSA CODE contains most of the information
competitors need l o take part in IMSA activities . References
are frequently made to the FIA International Sporting Code.
however. and contestants will find it helpful to become
acquainted with it. especially Appendix J .
We havetriedtomakethe1981 IMSACODEconvenientand
uncomplicated as possible . You'll find aminimum of bureaucratic jargon .
The main body of the CODE has changed vety little. Car
rules have been updated as experience and world trends
have dictated .
I urge a11 IMSA competitors. crews and officials to become
thoroughly familiar with the 1981 IMSA CODE . A good
working knowledge of these rules is key to the continued
warm and cooperative atmosphere which has always been
one of IMSA's better distinctions .
Have a safe and enjoyable season.
1
1
CHAPTER ITEM
...
2.10
.
3
PAGE
CONTROL OF COMPETITION . . . . . . . . . . . . . . . . . 1
lnternatona Control . . . . . . . . . . . . . . . . . . . . . . . . . . t
Nat ona Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
IMSA Control .................................. 1
IMSA Commis~ioner........................... 1
DEFINITIONS -TERMS ........................ 2
IMSA .International Motor Sports Ass'". Inc..... 2
IMSA Code .................................... 2
A~tomobile/C~r
................................ 2
Pump Fuel .................................... 2
Competition ................................... 2
Event
2
SBnCliOn
2
Driver ......................................... 3
Entrant ........................................ 3
Promoter ...................................... 3
MEMBERSHIP .LICENSES .................... 3
IMSA Members ................................ 3
Application Forms ............................. 3
Competition License ........................... 3
Crew License .................................. 3
Insurance ..................................... 3
IMSAConduet ................................. 3
EVENTS ....................................... 4
Organization .................................. 4
Approval ...................................... 4
Acknowledgment of Rules ...................... 4
Sanctions .....................................
4
Supplementary Regulations (SR) ............... 4
Insurance .....................................
5
Postponement Abandonment Cancellation ..... 5
Cla~sification .................................. 5
Courses ....................................... 5
Course Measurement .......................... 5
Timing Scoring. Starts Finishes. Results
6
Slarts .........................................
6
Startlng Line ..................................
6
Startmg Positions .............................. 6
Timing and Scoring ............................ 6
Control Line ................................... 6
Starter ........................................ 7
FalEe Stan ..................................... 7
Restart ........................................ 7
Minimum Duration ............................. 7
Ties ...........................................7
Winner ........................................7
Aw~rds........................................
7
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JOHN M. BISHOP
President. IMSA
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CHAPTER ITEM
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5
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
5.11
5.12
6.
6.1
6.1.1
6.2
62.1
6.2.2
62.3
6.2.4
62.5
6.2.6
6.2.7
PAGE
.
ENTRANTS DRIVERS ........................ 8
Competition License ........................... 8
FIA License
8
Entries
8
Refusal ........................................ 6
Falsification ................................... 8
Scratch .......................................
8
Conduct .......................................
8
Re~~OnSibilitV................................. 9
Alcoholic Beverages ........................... 9
Medical Responsibility of Drivers ............... 9
Safety Equipment .............................. 9
Advertising .Promotion -Contingency Prizes ... 9
RACING RULES
10
Passing
10
Pit Entry ....................................
10
10
Flag Signals .................................
Green Flag .................................. 10
Blue Flag ....................................
10
Yellow Flag .................................. 11
White Flag ................................... 11
Yellow Flag with Vertical Red Stripes ......... 11
Black Flag
11
Black Flaa with Oranoe
. Disc ................. 11
Red Flag .................................... 11
Black and White Checkered Flag ............. 11
Checkered and Black Flags Shown Together . . 12
Rules When Away From Pits
12
Rulesofthe Pits ............................. 12
12
Uniforms ....................................
Fueling ...................................... 12
12
Crews
Fire Prevention .............................. 12
Pushing ..................................... 12
Removal From Pits ........................... 13
13
OFFICIALS ..................................
Supervision ..................................
13
Appointment of Officials ..................... 13
Conduct .....................................
13
Separation and Plurality of Duties ............ 13
Race Director (Chief Steward)
14
Stewards
14
Starter
14
14
Timekeeper (Timer and Scorer)
15
Technical Inspector (Scrutineer)
Flag Marshal
15
Communications Marshal ....................
15
15
Course Marshal ..............................
Medical Director
15
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CHAPTER ITEM
PENALTIES .................................
Range 01 Penalties ...........................
Fine .........................................
Disqualilication ..............................
Suspension
LOSSof Points
Expulsion
PROTESTS
Form
Time Limits
Protests Against Cars ........................
Disposition of Protests
Awards ......................................
Maliciou~Protests ...........................
APPEALS
.............
Effect .......................................
Form ........................................
Hearing ....................
..............
Judgment ...................
..........
Mal~ciousAppeals ...........................
AUTOMOBILES
..................................
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Eligibility ....................................
Recognition Forms
Configuration ................................
Safety Requirements for All GT Cars ..........
Minimum Weights ............................
Authorized Modifications .....................
Grand Tourina.(GTO
and GTUl ..............
.
Experimental GT (GTX) ......................
All-American GTn (AAGT)
GT Prototype (GTP)
Eligibility Lists
GTO Division ................................
GTU Division ................................
Experimental GT Division (GTX) ..............
All-American GTe Division (AAGT)
GT Prototype (GTP) .........................
IMSA RS (Racing Stock) Category ............
...........................
...................
.........................
...............................
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....................................
................................
Eligibillly
Configuration
Safety Requirements .........................
Optional Modifications .......................
RS Sedan Eligibility List and Specifications ...
CHAPTER ITEM
11.6
11.6.1
11.6.2
71.6.3
11.6.4
11.6.5
11 6.6
116.7
12.
12.1
12.1.1
12.1.2
121.3
12.1.4
12.1.5
12.1.5
12.2
122.1
12.2.2
72.23
12.2.4
12.2.5
12.2.6
12.3
123.1
12.3.2
12.33
12.3.4
12.3.5
12.36
13.
PAGE
IMSA American Challenge Category .......... 49
Purpose ..................................... 49
Eligibility .................................... 49
Configuration ................................ 49
Official Weight ...................
...... 49
Required Modifications ....................... 49
Other Modifications .......................... 50
Approved Makes and Models. Engines.
Official Weight ............................. 54
STANDING SUPPLEMENTARY REGULATIONS 56
Camel GT Series ............................ 56
Duration .................................... 56
Car Eligibility ................................ 56
Driver Champions ........................... 56
Manufacturer Champions .................... 57
Camel GT Point Fund ........................ 57
Advertising ..................................
58
Champion Spark Plug Challenge Series ....... 58
Duration .................................... 58
Car Eligibility ................................ 58
Driver Champion ......................
58
Manufacturer Champion ..................... 59
Point Fund .................................. 59
Advertising .................................. 60
Kelly American Challenge Series ............. 60
Duration .................................... 60
Car Eligibility ................................ 60
Driver Champion ............................60
Manufacturer Champion ..................... 61
Point Fund ..................................61
Advertising .....................
.....
....... 62
APPENDIX
M
Equivalence Formulas
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1. CONTROL OF COMPETITION
1.1 lnlemational Control
The Federation Internationale de I'Automobile (FIA) istheauthority
which governs rules for international automobile competitions and
wovld ~hamoionshin
Series 01 camoetitionr. FIA has ~ublished
the Internat onal Sport ng Coae vrntcn cantarns tne ruler under whtcn all
FIA- %leae*ents are organozea and cond~ctedExcept as prov!ded in
An clc 12 ol me MSA CODE. F A s me f nal lnternal~onaleaun a1
appeal for appealable disputes arising out of FIA-listed events.
.
12 National Control
The Automobile Competition Committea lor the United States. FIA
(ACCUS) is recognized by FiA as the National Sporting Authority
(ASN) for the United States. ACCUS is therefore the sole authority
which oversees international automobilemmpetitions in the U.S.A.,its
territories and protectorates.
ACCUS is in turn composed of representatives of its live member
clubs and a number of individuals. The member clubs of ACCUS are:
- International Motor Sports Association. Inc. (IMSA),
- National Association for Stock Car Auto Racing. Inc. (NASCAR).
National Hot Rod Association. lnc. (NHRA).
Sports Car Club of America, lne. (SCCA), and
United States Auto Club. Inc. (USAC).
ACCUS delegates to its member clubs most of the normal dutiesof
anASN,includingtheauthorityto~rganize,sanctionand conductFIAlisted events. and events counting towards international and world
championships.
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1.3 IMSA CONTROL
The International Motor Sports Association. Inc. has established
these rules (the IMSA Code) which govern!he sanction, organization
and conduct of IMSA-sanctioned events, the standards foreligibility
and conduct of competitors and officials, the regulations foreligibility
and preparation of automobiles, and the rules for annual IMSAseries
of events.
IMSA may amend the IMSA Code from time to time by publishinga
noticeof amendment in eitheran IMSA bulletinor newsletter mailedto
IMSA campetitors,andanamendmentshall becomeeffectiveupon the
date of such mailing unless otherwise provided in the notice of
amendment.
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1.4 IMSA Commissioner
IMSA shall appoint a Commissioner responsible far the orderly administration of appeals in accordance with Article 10 of the IMSA
CODE and other specific duties and projects assigned by IMSA.
The Commissionershalldecideon behalfof 1MSA.whetherornotan
appeal should beconsideredand heard,and hisdecisionshall be final.
Notwithstanding Article 10.3. if the Commissioner decides that an
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Drlrer
A person named as the driver of an automobile in a competition.
2.8
appeal should be heard, he may name a court of appeal. Or healone
may hear the appeal. The court of appeal or the Commissioner shall
render a iudament in accordance with Article 10.4 and this .iudgment
.
shall be final and binding upon all IMSA members.
The Commissioner shall prepare for IMSA a written report of all appeal proceedings, which shall be subject to the same right of publication set forth in Article 10.4.
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Entrant
A person or organization whose automobile is accepted foreompetition.
2.9
Promobr
A person or body controlling a facility where events are organized,
promoted and staged.
2.10
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2. DEFINITIONS-TERMS
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3. MEMBERSHIP LICENSES
Standard nomenclature will be used wherever practicable In IMSA
activities
IMSA members are independent contractors and are neither
agents, servants nor employees of IMSA, and IMSA members assume
and take full responsibility for reporting and paying
- to theappropriate
authorities all charges, premiums, and taxes, if any, due or payableon
any funds iMSA members may receiveas a result d their participation
in IMSA-sanctioned events, including but not limited tosocialsecurity
taxes. unemployment insurance taxes, compensation insurance.
income taxes and withholding taxes.
3.1
IMSA-International Motor Sports Association. Inc.. P.O. Box
3465, Bridgeport, CT 06605. a national sanctioning organization
formed to promote motor sports: to organize. sanction. s u p e ~ i s e
and
conduct motor sports events; to promote uniform rules and safer
standards: to collect and disseminate information relating to motor
sports: to supervise and grant affiliation to other organizations with
similar purposes, and to cooperate with such organizations: and to
undertake any other activities to advance motor sports.
2.1
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3.2 Appllcatlon forms for an IMSA membership and/or license may
be obtained from IMSA headquarters, which is solely responsible for
issuing such memberships and licenses. Membership and/or license
application forms must befully executed, signed by the applicant,and
accompanied by the requisite funds. The mereacceptance ofan IMSA
membership andlor license application form and fee by an iMSA
official does notconstitutetheissuanceoforapproval by IMSAofsuch
application. Applicants will be advised in writing by iMSA headquarters whether their application for IMSA membership andlor
license has been approved.
IMSA
Code
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The aw$ and ragulst~onsga~ern
ng the sanctioning and conduct01
IMSA-sanclloned events IMSA may amena tne IMSA Code from tome
to t me by publlrh ng noticesolamenamentin IMSA bulletlnsor newslelters. as provided in Article 1.3 hereof
2.2
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2.3 A ~ l ~ m o b l l e / C I I r
A self-propelled land vehicle running on at least four wheels not In a
line which must always be in contact with the ground. At least two
wheels must effect the steering and at least hvo the propulsion.
P u m Fuel
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Anv oride of automotive aasoiine available at roadside stations.
wntno~tsdofttons of any natureexcept upperwbe whlcn mLst beadded
0 rect y ~otnegasol~nelankandnattnro~ghany
lnlecl8onordropollsr
3ystem. and whoch must not ralre tne Octane ratlng (SeeArt I 1 21
2.4
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Comp.Ullm
A contest in which an automobile takes part and which i s o f a m m petitive nature or i s given a competitive nature by publication
of resuits.
2.5
Event
An entire program of competitions.
2.6
2.7 Sanctlon
The dacumentaryauthority granted by IMSA toorganizeand hold a
competition.
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Competition LleenK is required of drivers. entrants, officials.
promoters and industry representatives; in other words, all key
persons directly involved in the conduct and presentation of IMSAsanctioned race events.
3.3
3.4 Crew Licenseis requiredofmechanics.crew membersand others
who are issued pit p a ~ ~ c r e d a n t i abut
l s whodo not have key responsibilities in staging IMSA-sanctioned events.
Competition and Crew License holders are covered by a $5,000
accidental death insurance ,~ o l t c, vwhich is in effect 24 hours a dav
rnrovgnodt tne b r m o l thc calcnaar year mpr nteo on the r licenses
Reg strallon for I n s MSA o e n ~ It is maae at Ine lame appl~~alooo
for
rucn MSA lleenre is appro...> 0, MSA neaoqLarlers.
3.5
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3.6 IMSA is dedicated to the highest standards of safety and sports3
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manlike conduct, and all membersandlor license holdersarerequired
l o conduct themselves accordingly.
4. EVENTS
4.1
Organlzstlo+An IMSA event may be organized by
a. IMSA
b. An Atfiliated Organization of IMSA
c. Oth'er organizations or promoters approved by IMSA.
4.11 Approval
The name, service mark or emblem of IMSA may baasrociated only
rapproved by
with activities and events which have been
IMSA.
Acknowledgement of Rules
Every driver, entrant, otficial, promoter VI vuln ~ ~ ~ t i c i p In
a nant
IMSA-sanctioned event, and every person who is issued an IMSA
license, is deemed to be acquainted with the IMSA Code and has
agreed t o abide thereby. I t is assumed that he agrees without
reservation to conduct himself inaccordance with the IMSA Codeand
renounces the right to any recourse or tribunal not provided for in the
IMSA Code except with the consent of IMSA.
IMSA requires that ail events be covered by proper liability and participant accident insurance in these minimum limits:
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4.12
Sanctions
Everyspeeil event with which IMSA's name,servicemerkoremblem
is associated must be formally sanctioned by IMSA.
4.1.3
4.1.4 Supplementary Regulations (SR)-define for all participants
the specific conditions for an event. SR usually are combined with
entry forms sent to competitors and officials. Since SR accommodate
local conditions, they may occasionally appear to contradict a
provision of the IMSA Cade: in such a case, the SR take precedence
over the IMSA Code.
The SR conlain this information:
a. Name, location, dates, nature and classification Of the event.
b, IMSA Sanction number and announcement:
''Held under the IMSA Code."
C. Name and address of the promoterlorganirer.
d. Schedule and loeation of all activities and competitions, classes
of automobiles eligible. etc.
e. Entry deadline, fees,numberofentriestobeacceptedandslarted
in each competition.
1. Schedule of awards and prizes.
g. Other necessary Informstion.
NO changes will normally be made in the SR after entry deadline.
except for reasonsofsafetyorforcesbeyondthecontroiof theresponSible officials.
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EVENT LIABILITY:
$2,000,000 Combined Single Limit
PARTICIPANT ACCIDENT:
Accidental Death-$20,000
Medical Reimbursement-$20,000
Weekly Indemnlty$lOOiweek for 104 weeks
(7 day waiting period)
Event liability coverage far IMSA-sanctioned speed events must
Ordinarily be secured under the IMSA Insurance Program; otherwise.
the insurance policies must be submitted to IMSAforapprovaipriorto
the granting of final sanction. Promoters must also make insurance
certificates available to the Race Director.
Pallicipant Accident coverage must be secured without exception
under the IMSA Insurance Program.
Every competitor, official, worker, mechanic and other individual
who I S issued a pit pass or other such credential must first sign a
release and indemnity agreement as provided at official IMSA event
reaistration.
t H I oeconsldereda seraour oreacn of lnese rules toenter restr cted areas of tne rac n g c l r c ~ lwotno~l
t
Irst s gnmgrucha releaseano ondemnll, agreement, to secure8 pol pass orotner creaentnal maer fa sc
pretenses, or to transfer such a credential to any other person.
4.1.6 Postponement, Abandonmat, C*ncellatlon
If an event is cancelled or postponed for more than 15 days, entry
fees will normally be returned to those who have hadnoopportunityto
compete.
4.2 CIasslflcaUon
iMSA w, I classtly events accoroong lothednvers and types of aulomoo es*nlch ~ l lakepan
ll
IMSA rll createanamalntalnchamp8onsn P seroes of events tor Specll c purposes and aLtOrnob~ler
4.3 Courser
NOCompetition may take place other than On a Courseapproved by
IMSA.
IMSA may:
a. Limit a course ta certain event classifications.
b. Restrict the classes of automobiles to be raced at a course.
C. Restrict the number d cars to be started in a race.
d. Restrict the course to certain grades of drivers.
4.3.1 Course M e a s u m a t
The Official length of a course is normally measured along the
centerline of the road.
4.4 Timing, Scarlng. Starts, Finisher, Results
Unless the SR of an event provide otherwise. the fallowing definitions and procedures will be observed at IMSA events.
Stsrt*
There are two types of starts:
a. The standing start where the cars are stationary at the moment
the Starting signal is given, and
b. The roiling start where the cars are moving at the moment the
starling slgnai is given, in which case a pace car may be used to
lead the field to the starting line. The rolling start is normally
used unless otherwise stated in the supplementary regulations
for the event.
4.4.1
Starting Llne-In a standing start. the starling line is the fixed position of each car
prior to the stalling signal.
In a rolling start, the starting line is the point on the coune where
timing begins.
4.4.2
Starting Posltlons
Cars wiil normally be placed in the starling iine-up in order of their
speed potential with the fastest to the front of the field.
A car may be qualified only by a driver officially entered to drive
tho,
... .n r. .
For events where starting positions for the feature races are determined by heat races, pale position goes to the winner of the fastest
heat. i n case weather or Other unforeseen events create inequitable
conditions in separate qualifying sessionsfora race, the Chief Steward
may elect to place all cars in the l i n t session in one row and all cars in
thesecondsession in theother row, with the fastestsessionon the pole
row. Otherwise, pole position goes to the tartest qualifier. The pole is
defined as the front row. inside position with respect to the first turn
past the starting iine.
4.4.3
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Tlming and Scoring
a. For the standing start, the timing and scoring commence at the
moment the starting signal is given; or, if automatic apparatus
is used, at the instant it is operated.
b. For a roiling start. the timing and scoring commence when the
leadinn
car crosses the startina" line.
n - r ~ i r.s and
t ..
st,bseouent
laos are normallv timed and scored when
.
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eachcarcrorsertheconlro I nealtnet mlngandscorlngstatnon
d AI starllnq cars WI I beeredtlea w th a I nosnfngposot~onwnemer
or not they are running when the checkered flag is given.
4.4.4
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Control Line
An automobile crosses a Control iine at the instant the center of its
front wheels passesoverthatline, orattheinstant theautomatictiming
apparatus is operated.
4.4.5
6
A drlver is concldered to be a rlarler in a cornpeellon only 11he has
Deen Lnder the Starter s oraerr at any time a w n g tne competlt,on. on
hls car and lully preparea to compele
False Stsrt
A false start occurs when a driver under the Starter's orders moves
forward from his assigned position before the starting signal isgiven.
TheSR may definea penaityortheRaceDirectormayassessapenalty
for a false start.
4.4.7
Restart
if it should become necessary to stop acompetition, the Race Director may restart thecompetition with competitors in theiroriginal starting positions, in single file according to theirstandingsat the time the
competition was halted, or as otherwise prescribed in the SR.
No work or replenishment may be done or assistance rendered to
any carduring the period afterthecompetition is haitedand restarted,
unless specifically authorized by the SR or the Race Director.
4.4.8
Mlnlmum Duration
If a competition isstopped at less than 5 W o f its scheduled timear
distance and is not restarled, it will beconsidered incomplete, end organizers Will not be normally obligated to distribute awards. If 50% or
more has been run. IMSA may call the competition complete.
4.4.9
Ties
In case of a tie (dead heat) the competitors concerned will share
equally the sum of the prizes allotted far their positions.
4.4.10
Winner
The driver or drivers of the car which completes the distance ofthe
com&tition in the least timeor the greatestdistance in the timesetfor
the competition wiil be declared the winner(s).
In Competitions of a given distance, the checkered flag will be given
t i n t to the winner, then to the other finishers as they cross the finish
line.
n compeltt ons of a timed length the cnewered flag will be g ~ e n
I rsl lo the leaalng Car as ( 1 Lrosses the llnnsn Ineat on after tncexp raIon of ins spec81 ea a u a l on tnrn to the other Inrsners asthey cross
the finish line.
4.4.11
Awards
AS one of the conditions of granting sanction, IMSA may require a
promoter to post the announced prize money prior to the stall of the
event, and that IMSA control the payment of these awards.
4.5
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5. ENTRANTS DRIVERS
will enhance thegood name of motorsportsand IMSA. Failuretodoso
may be considered to be a breach of these rules.
Compeutlon Llcenre
Every person who enters or drives a car in an IMSA-sanctioned
event, other than an FIA-listed event, shall possess a current IMSA
Competition License.
Resaonslbllltv
-D r w e r ~are rasponsoole lor tne ca nductof their
pctolion An oftense by a crew menlber may be r
5.1
5 2 FIA License
Every person who enters or drives a car in an FIA-listed event shall
possess a current FIA entrant and Driver License
iMSArequires thet entrantsand Drivers inan FIA-listed event which
is also part ofan lMSAchampionshiprariesadditionally possesslMSA
Competition Licenses in order to be eligible for championship Points
in that series.
Entrles
An entry submitted and accepted by IMSA for an IMSA-sanctioned
event constitutes a contract binding the entrant to take part in the
event, eitherwith thedriver($) designatsdorwith IMSA-approvedsubstitutedriverf8,unlesstheentrant isexcusedfromcom~etinabvIMSA
or~n~e'istneentranl
is prevented lromcompet ng by forces oeyund hls
control. and sucn an entry 8% bond ng d o n the organuerr to nold tne
event in accoldsnce wlth the IMSA CODE and the S~pLlemenlary
Regulations for the event.
If it should bedetermined that an accepted entrsnt hasno intention
to take part in nor fulfill his other obligations in connection with an
event, the entrant may be deemed to be in violation of these Nles.
5.3
5.8
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Alcoholic Bererages
It ISforbidden to consume any alcoholic beverages during an event
In the pits, Paddock or any other partionsol premises undercontrol of
the offi~iaIS.
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Medical Responrlblllty 01 Ddwn
An IMSA-licensed driver who suffers an injury or illness which affects his ability to drive shall refrain from taking part inan IMSAcompetition until he is again medically fit.
IMSA or the Race Director of an IMSA event may requirea driverta
be examined by a physician prior to issuance of a driver license, before taking part in a competition, or after injury.
It shall be the responsibility ofan IMSA-licensed driverto reportany
unusual medical condition, allergies or anucipated special treatment
he may require to the Medical Director priorto each event in which he
intends to practice or compete.
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5.5 FalsIIICallOn
An entry which contains false information or incorrect statements
may be considered null and void and the entry fee may be forfeit.
Scratch
An entrant may, with the permission of IMSA, scratch (withdraw)an
entry by advising IMSA of such withdrawal. If such notice is received
prior to the entry deadline date, his entry fee will be returned.
However, if anentrant or driver, properly entered inan event, failsto
appear,andilinstead heshouldtakepartinanothercompelitiononme
same day, he will have violated these rules and may be penalized.
5.6
5.7
Conduct
Every entrant and driver at an IMSA-sanctioned event is expected to
conduct hlmssifasagentlemanand sportsman andinamannerwhich
a =omdriver.
5.9
5.4 Refusal
Organizers may refusetoacceptan entry for any reasonand they are
notobligated togiveanyreason. Such refusal isfinaland notsubjectto
orolest or aooeill.
However, if an entry is refused, the organizers must advise the entrant as quickly as possible, and must return his entry tee.
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5 1 1 Salehl Equipment
Drivers must equip themselves with the follow^
lipment
while taking Part i n an IMSA competition:
a. Crash helmet of recognized high quality. It is recommendedthat
helmets meet the specifications Set forth in Title 49. Code of
Federal Regulations, Part 571. Federal Motor Vehicle Safety
standard Number 571.218, or meet the specifications set forth
by the American National Standards Inrtitute. Inc., in NASl
290.1 a 1971 and NASlZ90.1 a 1973, or bear theseal of approval
01 the Snell Foundation.
Driver's name. age, blood type, known allergies, unusual medical
conditions, and date of most recent tetanus booster shot must be
labeled on back of helmet.
b. Suit manufactured of Nomex or equivalent material and covering the body from the neck to the ankles and wrists. worn with
full-length underwear of similar material.
C. Gloves made of leather or tire-resistant material such as Nomex.
d. Socks made of fire-resistant material such as Nomex.
e. Goggles or face shields in open cars only.
1. Hood or face mask of tire-resistant material to cover facial hair
or hair protruding from helmet.
512 Advertlslng
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Promotion Contingency Prlzes
Entrants and drivers of cars must execute the standard advertising
release provided on each official entry form granting permission for
the useof hisname, photos and photosof his racing carin advertising
and promotion material, excluding product endorsement.
TO beeligible forcontingency prires.camptitorsmustactuaiiy use
the product in question, display the appropriate decal and executethe
Standard advertising release provided.
Competitors must comply with advertising requirements specified
l o r a SDonsored event and for series of events.
6. RACING RULES
6.1 Pa.rlng
It is the resoonsibiiihr of both the overtakina andovertaken driverto
assure sale pass ng at raclng speeor A ear lravellng a one may me
the full wooth of tns track rlowever. 11it isovertaken by afastar car.tne
Onver mast gave way to tne overtakfngcar Pass ng may oeentner rignt
o r left depending on the conditions of the moment.
Maneuvers which hinder, obstruct, threaten or create danger to
Othercompetitos, whethersuch msneuversaredeliberatearunintentional, are strictly prohibited and a breach of these ruies. Drives who
violate these rules may be warned, disqualified from the raceor otherwise penalized.
6.1.1 Pit Entw
Thmughout the periods of practiceand the race. access to the pits
must be made through the designated deceleration zone or pit
entrance. This zone is also considered part of the pits. The Chief
Steward may levy a fine or a penalty theequivalent of One race lap for
breach ofthis rule. Repeatedviolations may result indisqualificationof
the offender.
6.2 FIag Signals
The following signalsareused both toadvisedrivesof variousconditions end to directdrivesto obey variousspecific instructions. Cloth
flagsarenormally used, but may be replaced withsimilarly codedrigid
signalling boards or with lights. Steady iight isequivalent t o a motionless fiag; flashing light, a waved flag.
62.1 Green Flag
Start of race, or cancellation of a danger previously signalled. Track
is clear.
6.2.2 Blue FIag
Motionle~s:Another competitor isfoliov
may be trying
to pass you.
Waved: Make way for another competitor who is tryingtopass you.
Blue fiag wiii be used only in a case where the overfaken driver o b
viousiy is unaware of the following car. or is clearly obstructing
another car.
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62.3 Y e l h Rag
Motionless: Danger: no passing; slow down.
Waved: E x m e d a n g e r : ~ p I n g ; s i a w d m
bepreparedtostop.
Motionless veilow flaa is aenerailv usad to advise of an obvdous
danaer or to forewarn of a moreseriousdancerahead.
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stop racong until tney are past the danger lone.
Waved yellowflag may mean lmmlnentanoser!ousdangersuchasa
pan'a track blockage. fore on or near the tracr 01 a crowd contmi
harard.
When ail fiag stations go to a waved yellowcondition, drivenshouid
expect the race to be paced for a number of laps by the safely car, or
else the race to be stopped by the red f l a g Slow dawn. Slop racing.
Pas~ingofthesafety
car isabsolutely forbidden uniessacompetitor is
clearly signalled to do so. No passing of any car by another Is
permitted. Violations of these emergency rules wiii subject the
ottender to penally.
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62.4 Whlte Rap: Ambulance, firetruck, wrecker, or other service
Vehicle is on the circuit, or, a slow-moving race car is ahead.
6 2 5 Yellow FIag wllh Venkal Red S t r i p % Slippery surface.
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62.6 Black n a g
Waved: Stop in the pits for consultation next iap.Thisflag is usually
displayed alongwith the number of thecarconcerned for infractionof
rules 01 the circuit or act of poor sportsmanship.
i f a COmDelilor should fail to obev the black fiao after i t has been
dlspiayed l o h m on f o ~ consecuttve
r
laps, tne Race D rector may 8"Struet the Tomekeeper lo stop llmlng and acor nq the car
Fdrlea Warnong You havecommltlaa adangero~sorunsportsmanlike action. Desist or you will be penalized.
6.2.7 Bhek Rag rrlm O n w DISC
Your car has a mechanical faultofwhich youmay not beaware.Stop
at your pit next isp.
6 2 8 RedFhg
Complete and immediate stop for all can.
This flaa is used exciusiveiv at thedirection of the Race Directorto
rtopthe race Wnen t is snown or verswll bnngtne~rcarstoan orderly stop oft tne c o ~ r s eEafely end lmmedlately
Wnen so sd,osea by an otllclal arlvers may then orlve thew cars
slowly along thecouseto the pits. Noservice of any kind may be performed on any casfromthetimethe red flag is shown until the race is
restarted, unless it is specifically authorized by the Race Director and
announced to ail competitors.
6.2.9 Black .nd.Whlh Checkered Flag
End of race. Take one cool-off lap at reduced speed and stopatthe
pits.
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62.10 Ch.ckaad and Black Flags S h a n TogeIhW
Interruption of practice or qualifying session. Takecool-ofllapand
stop at pits. Expect session to be resumed when temporary difficulty
is corrected.
6.3 R u l s When Away from Plb
Only the driver may perform work on a car sway from its pits. No
physical assistance may be given the driver in performingsuch woR.
He may proceed on foot to his pit for parts, equipment, and toois: heor
his CO-drivermay return to the car on foot only.
When the car is stalled on the circuit away from the pits, marshals
may push it to a safe position without penalty. It is not permined for a
driver l o push his car except in the pits, however.
6.4 RULES OF THE PITS
6.4.1 Unllorms
Crew memDerS shall r e a r clean dniforms or other appropriateand
safeatt.reat all tlrnesdurlnga raceinorder lopresenttheoast poawble
appearance to the public.
It isrequiredthatany crewmembers handling fuelduringaracewear
fire resistant clothing covering all exposed akin areas and protective
goggles.
6.42. Fueling
All fueling in the pits will be done via approved overhead rigs or
standard NASCAR-type 11 gallon cans. Dry-break couplings are
mandatory for either. No spillage of fuel will betolerated in the pitaor
from the car.
Driver may remain in car and engine may be iefl running durlng
refueling, provided a crew member is standing by wilh proper fire
extinguisher.
It is forbidden for a crew member to work underneatha car during
fueling.
See Art. 11.3 for fueling rig specifications.
6.4.3 C n w
A total of 4 persons may actually perform work on acar in the p i b
during a race. Not counted in thistotalareadriverseated in thecar, a
driver entering or leavingthe car, and industry service representatives
examining thecar'sequipment, tiresorothercomponents,orthscrewman manning a fire extinguisher.
BAA Flm Prewntlon
Eachteam must be equipped withafireaxtinguishsrofatleast10lb.
ABC rating.
NOelectric motordriven l w l s are permined in the pieduring race.
6.4.5 Pushing
A cat may be pushed, in Me pits only, by the driver, his crew or 01ficials. and may be push-started in the pita if itfsilsto mrl usinp on-
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6.4.6 R e m l From Pltr
Cars may be removed from the pits during a race only win? t h e a p
pmvai of the Chief Steward. Otherwise, ifacarisremovedfrom itspit it
will beassumed it is bein. withdrawn from therace.ChiefStewardwil1
normally permlt removal d a car for necessary worktoo inconvantent
or ha28ldOuS to do in ins pol. and wlii asslgn a marshal toooserve tne
work done.
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7. OFFICIALS
The officials responsible for conducting an IMSA event are
organized as follows:
1 j-GEGGq
TECHNICAL INSPECTOR
)
MEDICAL DIRECTOR
COMMUNICATIONS
MARSHAL
COURSE MARSHAL
Except for the St-rds,
they may delegate part of thelr duties to
assistants.
In FIA-listed events, the duties of the Race Director (Clerk of the
Course) and the Stewards diflersomewhatfrom thoseoutlined in this
chapter. (See the FIA International Sporting Code. Chapter X).
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in ado11on to there ofliclals, IMSA maewes the right to appoint a
parson to evaluate and report on tne evant.
1.1
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7 2 Appobhent 01 OMclals
The Race Director and Stewards are appointed by IMSA. Other
officials are appointed subject to appr~valof iMSA.
7.3 Conduct
Every official is expected to conduct himself as a gentleman, in a
manner which will reflect credit on the sport of automobile racing and
on IMSA. IMSA may remove an official's appointment and may penaiize him if he fails to conduct himself proprly.
7 4 S p n t b n and Plurallh 01 Duties
An onlclai can nave no rerponono lhty or aLthorlty beyond that attached to h~sappoontmentrlowsver. except far tnaRace Dorector and
the Stewards, a person may hold more than one official position.
7.9 T.eknk.1 l n m t o r (8crutlm.r)
The Technical Inspector Is responsible tor checking ell competing
carsfor~sfetyand
eligibility. b a n d his assistant^ will conduct inspections at the Race Director's request, and will report any cars which he
finds are Unsafe or ineligible.
7 6 Raca Dlnctor (Chlef Stward)
The Race Director is the chief executive at an event and is responsibledlrectly to IMSAforthe conduct oftheevent.Acwrdingiy, he has
the duty and authority to:
a. Keep order in cooperation with civil authorities responsible for
~ u b l i CSfetv.
b Execdte the program of COmPetlt~OnYand Otner actmt1es punct ~ a
y by 01rectlng the drovers and tneor cars, ofllclalr and the,,
assistants, and other participants.
C. Prevent ineligible cars and drivers from taking part.
d. Order inspection of any Car in order to verify its eligibility.
8. Authorize changes of drivers or cars.
1. Settle protests and disputes.
g. Determine whether conditions aresafe to continue the evenL or
else postpone a competition, modify theSR oraltertheschedule
for reasons of safetv or forces bevond his control.
h Assess penalties n accordance wltn tne ISMA-Code
I Replace any offlclal not able l o pertorm n s dulles
I SJPOIYIW the d ~ s t r ~ b ~01
l ~awaros
on
t o e lglblo eompelltors
k. Compile a report an all aspects of the event as requested by
IMSA.
7.6 Stewards
Stewards are appointed for their knowledge, experience, proven
judgment and stature In the sport of automobile racing. In evenu not
listed on the FIA calendar. Stewards act only in a judicial or advisory
~apacity.and have no executive responsibility, eitherringlyorcollec1tlvelv. The Drimarv functions of the Stewards are to:
a Act as a Court 01 lnqbory. when reqdened oy the Race D recror.
to cons aer protests and other dlsp~tesTney may call an0 near
wltnelses. Consider erloence an0 mekerecommendatlonstothe
Race Director for solving such disputesand assessing penalties.
b. Advise the Race Director on any matters which they feel will improve the conduct or safety of the event.
7.7 Starter
The Sterter operates directly ~ n d e tne
r Race Dnrector and controls
tne Competing drrvers from the tome the cars take thelr startlng pos lions untll thecompetition isended and allcars havelefltheracingcircuit.
7.8 Tlmekeepr (Tlmer and Sconr)
TheTimekeeperand hisstaff are responsibleforthaaccuratetiming
and scoring of the event. He prepares the official results, maintainsofficial qualifying timesforCompetingautomobiles,andfurnishestiming
and scoring information requested by the Race Director.
7.10 Flag Manhal
The Flag Marshal is responsible for mrultlng. training and arsignment of race control personnel at corner stations.
7.11 Communlutlons Manhsl
The Communications Marshal is responsible for operation of the
System used for transmining and receiving Information between
central control and the corner stations.
7.12 COY- Manhml
The C o u w Marshal is responsible l o r final preparation and maintenance of the racing plant, and other related duties assigned by the
Race Director.
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7.13 M e d l u l D l n ~ t o r
The Medical Director is responsible for staffing and operating the
event medical establishment withqualified physicians, nurses and first
aid personnel. His primary responsibility and purpose isthe treatment
and disposition of any injuriesincvrred bythe panicipantsintheevent.
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8. PENALTIES
Any driver, entrant. official or other participant who violates these
rUlesortheSRofanevent,attempts tobribeanyoneconnected withan
IMSA event or activity or is party to a fraud or other act prejudicial to
IMSA and the good reputation of motorspons may be penalized according to the nature of the offense by IMSA, the Race Director of an
event, or by a court convened by IMSA.
IMSA shall have the right to publish notlce that it has imposed a
penalty and the reasonstherefor, and the perronor body referredtoin
such noticeshsil haveno right toact against IMSAortheperson publishing the notice.
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8.1 Range ot Penallies
Penalties which may be Imposed. in order of their severity, are:
a. Fine
b. Disqualification
c. Suspension
d. LOSSof accrued points
e. Expulsion
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8 2 Flna
Afineofupto$500may beimposedby IMSA,theRaceDirectarofan
event. or a coun appointed by IMSA. Fines must be paid within one
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week, and a member's competition privileges areautomatically under
suspension until the fine is paid. All fines shall be remitted to
IMSA, P.O. Box 3465, Bridgeport, Conn. 06605.
8.3 Dlrquallflcation
The Race Director may disqualify a driver, an entrant or an automobile from competition, in which case his rights toany awards in the
competition are forfeit, and the official results will advance the next
competitor accardingly.
8.4 Suswnrim
IMSA or a court appointed by iMSA may suspend a membefs privilege to take part in competition for a definite or indefinite period.
8s LOU of Polnts
Loss of accrued points earned b y a competitor may beimposed by
IMSA or a court appointed by IMSA.
8.6 E a p ~ l o n
IMSAor a court appointed by IMSAmay expel a member forserious
offenses.
9. PROTESTS
determined by the Race Director and Technical Inspector.
If the car is found to conform to the rules and the protest is disallowed. this bond will be forteit and will be used to covet the costs
involved.
If the car is found to be in violation of the rules and the protest is
allowed, this band will be returned to the protestor and the protested
party will stand all expenses involved in the inspection, and additionally is subject to penalty assessed by the Race Director.
If an entrant or driver of a protested car does not allow inspection
under these t e n s , he will be disqualified by the Race Director
immediately.
9.4 Disposition of Protests
The Race Director will as soon as practicableeither personally hear
all partiesand witnesses involved inthedispute.orelse hemay request
the Stewards to Conduct such a heamg to consider testimony and
other evidence. The Race Director will dispose of the protest and will
advise all parties concerned of his decision. If a decision cannot be
made immediately, he will advisethe timeand place the judgment will
be announced.
All paRieS concerned shall be bound by thejudgmentgiven,except
in case of a valid appeal.
Only an individualentrant or driver taking part inscompetitionmay
enter a protest in that competition. He may prototest any irregularity.
decision, act or omission of the promoter, official, entrant or driver
which he~onsidemtobeaviolationof theIMSA-CodaorSR,except he
may not protest the refusal of an entry.
9.5 Awards
The prizes and other awards may be distributed when the protest
period has elapsed, or at such time as all protestsaftecting the standings have been settled.
9.1 Form
Protests must be made in writing, specifying the rule considered to
have been violated, accompanied by a protest feeot550.00 and signed
by the party making the protest.
9.6 M a l i ~ I Protests
~s
I a protest is judged to have been tiled with malicious or spiteful
intent or otherwise in bad faith, the Protestor may be found guilty of
violating Article 8 of these rules and may be penalized.
9.2 Tlme Llmlt8
Protests must be received bytheRaceDirectorwithingthefallowing
time limits:
a. Against the ~ l i d i l of
y an entry, qualification of an entrant.drlver
or car: Prior to scheduled closing time far Technical Inspection.
b. Against handicap or starting position: Immediately upon their
announcement.
C. Against a mistawe or irregularity during a competition: 30 minutes after the end of the competition.
d. Against the results of a competition: 30 minutes after posting
of the results.
9.3 Pr0t.st1 Apalnst Cam
When a protest 13maaeagaonstacahellglo ity the protestor must
post w t n the Race omrector.10addltlonto tne lorms ana tees speclfled
i n 9.1, a cash bond adequate to cover the costs ot any disassembiy.inSpection and reassembly required. The amount of this bond will be
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10. APPEALS
A Person or organization may file an appeal against a judgment atfecting him and imposed by the Race D~rectorof an event or by an
IMSA first court, provided the appellant first gives notice of his intention to appeal to the Race Director or the court.
The IMSA Commissioner (Ref: Art. 1.4) is responsible forthe orderlyadministratian of appeals. He will decide an behalf of IMSAwhether
or notanappeal should be considered and heard, and hisdecision wiil
be final. In ease the iMSA Commissionerdecidesagainst considering
or hearing an appeal, the appeal fee will be returned.
10.1 Eltect
GivinQ such notice of intention to aooeal
. . will not affectanv oenaltv,
or judgment being appealed. The Race Director, however, may withhold payment of any prizes which wiil be affected pending the out~
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come of such appeal.
Competitors am responsible lor the transport and security of their
fuel f r m the time It isdispensed to them through the track.s tacilities.
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Form
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Appealsmu~tbe n wr$tfng.ognedb y theappellant.accompanled by
an appsa feeof $100 00.end recelvedetlMSA headquarters w.tnlnten
days of announcement o l the judgment be ng appealed
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10.3 Hearlng
i f IMSA decides to hear an appeal, acaurt will be named. All parties
will beadequately advised of the timeand placeof the hearing and will
be entitled to call witnesses, to representthemsalvesorbe represented
by advocates, and to present evidence in behalf at their cases.
10.4 Judgment
hec court may uphold araeny enappea1,va~veor~ncrearepenaltleS
O ~ ~ Y I D L.
S ~mposed.
Y.
levy iresn pena ty, and w.11 determlnedlsposltlon
of the appeal tee.
he court .hall not order any competition to be rerun
IMSA snell navethe r ghtto publosh inei~ogmento l t h e c o ~ n a n d t o
uso tne namesof partoes nvowed These persons snall haveno rognt to
act ega nst MSA the iMSA Comm ssloner or ahomever Pub1 sne*
the judgment.
11.3 M.ch.nk.1
Condltlon md Technlul lnspnnon
Each entered car must be inspected and approved by IheTechnical
Inspector before i t will be allowed to participate in competition or
practice.
Candamaged oralteredafier Mey have been approved at inspection
are subject to reinspaction and approval. Major body.components
must be maintained in normal position throughout the competition.
questionable can sub]ect to decision ot the Race Director.
1. Technical Inspection will Cover:
a. Eligibility under IMSA rules.
b. Safety and design and construction per inspection form.
C. Appearance clean and neat, no old damage.
d. Identification numbers must be placed on both doorsand hood.
must be non-retlective end legible to the satistaction of the
Timekeeper.
e. Racing tires mandatory, unleos SR provide othemise.
1. Leakege - n o t allowed.
g. Driver safety equipment, per Art. 5.11.
h. Compliance with sponsor advertising.
2. lnsoections
a Tne tlmnng, method. and type of car anspaction and the number
of cars to be lnspacted at any event wlll be determined by the
Tecnn
lnsoector
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b. IMSA reserves the right to impound end inapectcancompeting
in an event.
0 . It is the responsibility of the driver or car owner to preparea car
tor inspection when requested to doso byMeTechnical inspsc(or.
d. Admittance to any area in which inspections are being made is
cwtrolled by the Technical Inspector.
3. Satety Requirements for All Cars
a. A six point driver restraint system of appmved design must be
installed.
b. Passenger sea& seat backs, mala and other loose gear must be
removed, unless car rules specify otherwise.
C. Steering lock mechanisms must be removed.
d. Where applicable. a
' sturdy metal strap must be installed under
the front ot the propeller shaflto preventtheshantmmdropping
in case of tailure of the coupling.
e. An approved net covering the driver's window opening must be
securely installed whether or not the window remains open.
f. Center top of steering post must be padded with production center corer or at least twO inches of a resilient material.
g. Windshield safety clips. 3 each st the top and banom, bolted or
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10.5 M~IIcIoYsAppeaC
IMSA may penalize the author 01 an appeal judged to bemalicious.
spiteful or who otherwise acts in bad taith.
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11. AUTOMOBILES
IMSA will publish rules and specifications for variousclasses of c a n
eligible to compete.
H I Tlres
IMSA may regulate the eligibility of tires in its sanctioned
competitions. In order that no competitor shall have any unusual lire
advantage, IMSA may:
prohibit the use of a brand, model, size or rubber compound
unless it is available for sale to all entered competitors.
- impound end inspect a Competitor's tires.
in some circumstances, require aeompetitorto usethesametires
in a race as he used in qualifying.
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.-. must u s o n y pdmpfuelasdet#nea
in Chapter2,exceptthat
any non-oxygen-bearlog addlt.vs may be Lsed provtded the SpeclflC
oravotv
g does no! exceeo 750 as measurea oy a
. 01 tho r e s ~ l t ~ nfuel
hydrometer.
IMSA may require in an event SR that all contestants use the same
kind of pump fuel, or the fuel provided at the circuit.
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riveted to the bodv. and soacad at least 1 2 aoart must be
onrlalleo Safety g ass is requored for wlndsn e d.
h. Rear n noo* straps. 1" x 118". bolted or r vetea 10 00oy at top
an0 oortom of g ass. mast oe inslalled, wnere app cable.
i. Scattershields or explosion-prwf bell housings are required on
all cars where the failure of the clutch/flywheel could create a
hazard to the driver.
j. All cars must be equipped with a masterelectricalcircuit breaker
(stopping engineand fuel pumps) which iseasily accessiblefrom
both insideand outside thecar, or with twocircuit breaken- one
acce$sible from inside and one outside. The circuit breakers
must be clearly marked by a spark in a blue triangle.
k. All cars must have at least two operating red brake lights and
two tail lights Which Will be illuminated during darkness or
periods of rain.
I. Headlight bulbs must be protectedagainst breakage. Headlights
may be taped or the bulb (only) may be removed and replaced
with metal or fiberalass solid Dlate of same sham as bulb and
fltteo n the same manner It s h o ~ l ooe POSS o e 10 remove plate
eas I, lnrlall and operate head1 gnts rleaol qhl modntong receplaces an0 f~nctlonalw rlng must rems n lnslalled at all tfmes
m. Effective internal and external rear view mirrors must be installed.
n. Safetyfuel cell of an approved type must be installed. Dry-break
fuel fillers are highly recommended and body-work may be
modified to install them and breathers. Filler orifice and vent
shall not protrude beyond the planeoftheoutside mounting surface. Check valves must be installed to prevent lass of fuel from
filler and vent. Catch tank or an IMSA approved discriminator
valve must be used on the vent tube to orevent s~illaae
,
" durina
"
fuel stoos.
will be tolerated. Refuelina eauioment lo~. No soillaae
~.
cateo *lln n the orlver'r Compartmelll must oe 3n e Oeo SO as to
prerenl nazaro to !he drover in even1 of r-ptdre Vent ldbe must
extend to the outer body surface and be directed away from hot
equipment.
O. Hoods. deck lids and movable body sections must be secured
With Supplemental pins or straps. Latches may be de-activated.
On cars where a key is required to open the trunk lid, the lock
must be deactivated or may be removed.
p. Supplemental pins used to secure movable body sections (such
as hoods, doors, fenders, lids and removable tops) must have
attaching cables to prevent accidental loss of pin.
0. NOconcealed oressure tvoe containers. feed lines or actuatina
mecnan Em%are perm llcd even ifinoperao c Extra f ~ ce
e 1s or
Ian%$ conceaneo 07 otherwise. are not permattea
r No pan of a car may t o ~ c h
tnegrouno wnon any one of its tlres
is deflated.
~
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20
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s. Original door latches must be retained on all cars.
1
1. Overhead fuel rigs are subject to IMSA approval. (Maximum
height to top of fuel rig is 2 meters (6'7").A maximum hose
diameter of 2" i.d. will be permitted. Each rig must have an
automatic shutoff valve between tank and hose. Leakage from
fuel rigs will not be tolerated.
U. Full roll cagesolapproved design including a side baronthedriver's side are mandatory It is recommended fhattheside barexlend to the outer skin of the door.
RECOMMENDED R O L L CAGE
~
<
IMSA RS SEDANS
Main Structure:
1H" x ,090"
Secondary Braces: lfi" x ,090"
IMSA GT AND AMERICAN CHALLENGE
Under 2600 lb:
1 %x ,090"
2 x 090"
Over 2600 1b:
MATERIAL: Seamless Mild Steel Tubing
All dimensions are recommended minimum.
For equivalent Strength in alloy steel tubing, see manufacturer's reference charts.
NO aluminum or other non-ferrous material permitted.
except specifically approved factory installations.
21
11.4 IMSA GT C a t e m
11.4.1 Purpose
The IMSA GT category is designed to promote competition among
drivers and manufacturers in an annual series of IMSA-sanctioned
professional race events.
- .
11.4.2- ElialbllHv
IMSA wtll determine and publish a lhsl of makes and mooslr of
automooller ellglole to compete n tne MSA GT Category Eflglble
cam may derive tram one of the following groups.
(a) G n n d Tourlng (GT) - IMSA Group 4 cars. Makes and models
homologated by FIA in Groups 1 through 4 of the AppendixJedition
inetfeet between January 1.1969and January!. 1976,andaisaofthe
edition in effect after January 1, 1976, and other volume-produced
modeis recognized by IMSA.
(b) Experimental Grand Tourlnp (GTX) - IMSA Group 5 cars.
Makes and models derived from FIA Groups 1through 4 and other
volume-produced models and components recognized by IMSA.
e) All-Amerlean GTe (AAGT) Cers of a GT character built from
readily available components specifically approved by IMSA.
d) Grand Tourlnp P r a t o l y p (GTP) Two-seater cars conform ng
to rLleS aeveloped loonlly by IMSA an0 tne A~lomoboe C do
de I'Ouest (ACO).
-
-
11.4.3 Heownition F o m
GT cars recognoled in 2 (a) an0 2 (b) are Osscrlbsd in off clal FIA
Boolor IMSA homologatlon lorms aua laoe from ACCUS. FIA.
SJ le 1204, 1701 ' K S t . h W Wash ngton DC 20006 phone:
(202) 833-9133, or from IMSA (Cars recognized in 2 (e) and (d) r e
quire no recognition forms.)
Individual entrantsare responsible for securing theabove formsfor
the makeand model entered and shall be prepared toshow them to
the IMSA Technical Inspector on demand.
11.4.4 Conflgurstlon
Except where these rules require or permit variations. GT. GTX.
AAGT and GTP Cars shall be prepared according to the rules
hereinafter set forth.
GT Cars recagn 2eo n 21.5) may bo prepared accordlnq to FIA
Append x
G r o ~ p s2 4 of the ed llon n elfeci at me time tne
mane an0 model *as nomologated by FIA
..
Safely Requirements for All GT Can
(a) Approved safety fuel cell with a maximum capacity in accordance with 1976 FiA Appendix J. Example:
16W 2000 cc - 26.4 gallons;
29.1 gallons;
2000 - 2500 cc
Over 2500 cc and all GTP 31.7 gallons.
.4.5
-
-
-
Fuel cell in GTcarsmust be positioned closely as practicablelo
the originaltank: in GTX. AAGTand GTPcars, perspecial rules
contained herein.
(b) On-board fireextinguisher olthe inertgastypewitha minimum
capacity 01 10 Ibs. (Halon or Freon), with manual trigger operable both by driver and from outside the car. Trigger must be
marked by a red circle with letter " E .
Outlets should be directed into driver's and fuel cell compartments.
11.4.6 Mlnlmum Weights
(a) GT cars recognized in 2 (a) and havinganenginedisplacement
of more than 2.5 liters (GTO) must meet or exceed the current
FIA minimum weight scale for cars in Group 4. GT cars
recognized in 2 (a) and having an engine displacement of less
than 2.5 liters (GTU) must meet or exceed the following
minimum weights:
0.8 lbs per cc
- 4-cylinder pushrod 2-valve engines
other 2-valve conventional engines
0.9 Ibs per cc
1.0 Ibs per cc
4-valve engines
0.9 ibs per cc
Rotary engines: standard side port
- peripheral port- ear buret or^ only
2250 lbs
Absoiute minimum weight for any car
1600 lbs
-
(b) GTX cars recognized in 2(b) must meet or exceed the current
FIA minimum w i g h t scale for cars in Group 5.
(c) AAGT cars recognized in 2(c) must meet or exceed thecurrent
minimum weight scale for cars in Group 5 less a tolerance of
1on.Theseminimum weightsaretaken with thecar inraceconfiguration with all safety equipment installed, butexcluding the
fuel and driver.
(d) GTP cars recognized in 2(d) must meet or exceed theminimum
weights specified by their rules.
Engine
Displacement
up to 1600 cc
2000 cc
2500 cc
3000 cc
3500 cc
1000 CC
1500 cc
iooo CC
3 0 0 CC
SOW cc
6500 cc
70W cc
GTX-2 (b)
GIWP 5
1488 lb.
1620 lb.
1764 lb.
1896 lb.
2017 lb.
2136 lb.
2260 lb.
2346 lb.
2458 lb.
2546 lb.
2623 lb.
2690 lb.
GT-2 (a)
Group 4
1631 lb.
1766 lb.
1940 ib.
2083 ib.
2216 lb.
2370 lb.
2469 lb.
2579 ib.
2701 lb.
2600 lb.
2686 lb.
2954 lb.
23
16W ib.
1706 lb.
1615 ib.
1924 ib.
2033 lb.
2113 lb.
2212 lb.
2291 lb.
2361 ib.
2421 lb.
2734 lb.
2767 ib.
2932 ib.
30W lb.
3042 lb.
3230 ib.
7500 CC
BOO0 cc
over 8500 cc
2461 lb.
2490 lb.
2639 ib.
11.4.7 Authorized Modlncallons
11.4.7.1 Grand Tourlng (GTO and GTU)
Cars recognized in 2 (a) are regulated by the following rules,
based generally upon FIA Appendix J. 1980 edition. Articles 261
and 265.If a car is found to be modified beyond these rules, IMSA
may permit theentrantto compete inGTX.AAGTorGTPcategories,
as appropriate.
(a) Minimum weight: per An. 11.4.6.
(b) Tooling of original. or homologated replacement, mechanical parts is permined, provided it isalways porsibletoidentify the series-production pan. It is not permined to add
material to any mechanical parts of the engine, gearbox or
final drive components.
(c) Engine - cylinder head and valves: in addition to the modifications permitted in (b). valves, valve guides and valve seats
arefree,except it isnotallowedtochangethe numberof valves
per cylinder. Washers may beaddadtothevalvespringassembly.
(d) Engine- induction system:free, except thatsupercharging is
not permitted unless recognized for a given make and model
and approved by IMSA on an individual basis. Superchargers
will be strictlv
, reouiated in anv case.
(e) Engine - overborong: up lo 065 in .s permftted provlded the
res~it8ngdisplacement does not exceed the m 1s 01 tne IMSA
category (GTOlGTU). 01 r permlttea lo Jse seeres
(f) Engine -exhaust system: free, except that outlet(s) must be
located rearward of the driver compartment.
(g) Engine - bearings: may be replaced by others of the same
type.
(h) Engine - gaskets: may be replaced or eliminated.
(i) Engine
lubrication system: oil sump is free and original ail
pump may be modified. Original number of oil pumps may be
changed. Dry sump lubrication is permitted. but tank must be
located outside the driver compartment.
Oil filters and coolers are free, except they must be mounted
within the bodywork.
(j) Engine camshahs and valve gear: free, except the number.
location and driving system of the camshafts may not be
changed.
(k) Engine - pistons, rings, wristpins, connecting rods: free.
(I) Engine - other elements:
Free: mountings, cooling fan, water pump, fuel pumps, posi-
-
-
-
24
tion Oltheenginawlthintheoriglnelengineeompanment.Fuel
Pumpls) may not be located in drlvefo compartment
(m) Drive train: gearbox ratios, mountings. salection forks and
Shill linkage are free.
Finaldrive ratios,shaftsandjointsarafree.Umitad-dlporselflocking differential may be fined. Final drivecasing may berePlaced with another of the same type. Clutch is free.
(n) Suspension: it is permined to strengthen the original suspension pans, add or remove anti-sway bars and axle-locatingdevices, modify or repiace the suspension springs, add auxiliary
apringr, reinforce shock absorber mountings, relocate
suspension pivot points. and substitute suspension bushings
and joints. Axlelocating devices may not pass through bodywork. except that for GTU division cars a special ruleapplies.
Rear seat well may be covered flush with the top of the well;
minimum thickness ,035in. This cover will be considered as
the floor/bodywork for this section of the car.
(0) Steering: ratios are free.
(PI Wheels and tires: maximum complete wheel widths, based on
engine displacement, may not exceed:
UP lo 1300 cc 9 in.
1600 cc 10.5 in.
2000 cc - 11.5in.
3000 cc - 13 in.
5000 cc 14 in.
6000 cc 15 in
Over 60W cc 16 in.
(tolerance: l/Z in.)
Ail four wheels must have the same diameter. Spare wheel is
optional. Track dimension is limited to satisfactory inner tire
clearance. Maximum total car width may not be exceeded.
(q) Electrical equipment: free, except that main headlights and
two operating tail/stop lights must belocated in original positions. Headlight bulbsmay be removed andopenings covered
with flat or identically-shaped plates in daytimeevents. Banery
must be located outside the driver compartment unless
homologated. Dual ignition is permitted only if makefmodel
is SO recognized and homologated.
(r) Fuel tanks and water radiators:
Fuel capacity is limited by An. 11.4.5 (a). Approved safetyfuel
cells per FIA FT-3 or FTA standards are required. Filler
openings may be relocated. but new fittings must not protrude
beyond the plane of the coachwork, and must be installed so
that no fuel will leak into any inside compartments of the cat.
Fuel tank must be located in the standard position unless
change is specifically authorized.
-
-
25
Water radiator capacity and location is free, except that no
modification can be made to the coachwork.
($1 Brakes: rotors.. calioers
. and drums are free.
ftl Cables
and oioes: mav
be freelv modified or relocated.exce~t
~,
~~.~
-~~
that fuel and high temperature llquid pims shall not pass
through driver's compartment unless they are armored.
(u) Springs: may be modified or replaced with othersof thesame
type (coil, leaf, etc.) provided they are mounted inthearlginal
position. Auxiliaryspringsmay be added oncondition thatthe
original springs are retained and continue to pertorm their
principal functions.
(v) Coachwork: is defined as all external parts of the cartouched
by the air stream and located above the planecreated by the
four wheel hubs (driver aboard), and all visible Internal parts
of the driverlpassenger compartment, including the floor
oanei. The oriainal external sham and material of the coachwork must be manntalned exceot that the matenal of doors
eng ne ana luggage compartment ids i l free Any ~gntsnmg
or m ~ o ~ l n c a t ~~n
o ncn i s not express y permlttea is faroldden
Any klnd of re nlorcement 0% perm tted Passenger seat and
rear seats may be removed. A rigid metallic firewall, flame and
leak proof, must be installed to separate the driver campartment from the fuel and engine compartments. Fire extinguisher may be installed in the driver compertment. Exterior
decorative strips may be removed. For GTU cars, thematerial
of fenders is also free. Fender flares, whether of original or
Substitute material, mustconform to the fallowing dimensions
and diagrams. Inner fender panels may be modified but must
enclose the engine compartment completely without gaps
..
.~,
~~~
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~~~
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IMSA may recognize alternative fender flares in exceptional
cases.
Bumpers which are not integrated with thesurrounding coachwork may be removed, in which caseany protruding brackets
must also be removed. The material o f integrated-type
bumpers may be changed, but they must remain standard
dimensions and shape.
Side windows and winding mechanisms may be removed. Sub26
stitute glazed material may be used for the side and rear
windows. Aerodynamic devices may be installed as recognized
for specificmakesand models.ordesignedtotheselimitations:
must not protrude beyond the perimeter contour of the
coachwork as viewed from above.
must not Confuse the identity of the car.
- must not be adjustable from within the car
must not allow air t o p a r s between device and the
Coachwork.
must not obstruct rear view.
rear device must be located aft of the vertical centerline
of rear axle.
front devicemust belocated below planeofthewheel hubs.
Maximum overall width: 200 cm (79 in.), except that Chevrolet
Corvette models are permitted 210 cm (83 in.).
Firewsll:separatingthedrive/passengercompartmentfromthe
engine and fuel Compartments is mandatory. Steel material of
22 gauge is recommended, and may be used to replace in its
original position any non-metallic standard firewail.
Iw) Heating System: may be removed.
(x) Other options premined:
reinforced suspension elements interchangeable with
originals.
- instrument panel.
sew0 seering.
steering mds.
axle-locating devices.
on-board jacking system, except i n GTU division.
-
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11.4.7.2 ExpHlmental GT (On)
Cars recognized in 2 lb) are regulated by Articles 268and 269 of
the FIA Appendix J. 1979 or 1980 edition, for Special Production
C a n (Group 5). interpreted and applied by IMSA as follows:
la) Minimum Weights: (per Art. 11.4.6).
l b l CoachworWCharsis~iCoachwork Theoutrlde surfaca6shaPeandmater!al olthe
Orlo na coachwork and rocker paneismust beratalned and
must ramaln ldent loable. except for !he addot~ons.modlfocations and substitutions permitted i n these ruler.
Overall length of the Coachwork is regulated by the FiA
homologation form: maximum overall width: 2 meters 179
in.).
if) Bodysheiluha3sis: No modification mav be made in me
Sertes produced bodyshell andlor chsssns except that re!"forcements may be added or removed, and rocker panels
may be altered for ductlm ourooses
~
~
~
iii) Doors and lids for engine and luggage compartments may
-.
n
~
~
be constructed ofsubstitute material providedtheir original
outsideshape is retained. Door hingesand handlesaretree
but original type of latch must be retained.
Lids for engine and luggage compartments may be ventilated but must be interchangeable with the originals.
iv) Glass surfaces: except for the windshield, which must remain as series produced, the transparent material is free.
Original sizes and shapes of all glazed areasand openings
must be maintained.
V) Cockpit ventilation openings: may be made in the coachWork at the rear roof edgeabovethe rearwindow andlor in
the area between the rearsidewindowandthe rearwindow,
but they may not protrude beyond the original surfaces of
the coachwork.
vi) Fenders: are free in shape and material but are limited
otherwise as follows:
- front fenders may not extend rearwards beyond the ieading edges of the front doors.
- original wheel arches must be retained.
fenders must eflectively cover the whole widths of the
wheels and tires for at least one-third of their circumference.
- Any rearward openlngs must beclosed by screensor 10"vcrs l a prevent rcelng the tlres lrom the rear
YU)
lnsde coachwork Free. excepl
- driver seat must be located entirely on one side or the
other of the centerline of the car.
- no sharp angles or protrusions on dashboard.
- Original bulkheads defining the front and rear of the
driverlpassenger compartment must be retained. Components other than the engine block, cylinder head@).
Sump and crankshaft may be installed such as to pass
through these bulkheads if they protrude intocockpit by
less than 20cm (measured perpendicularly to bulkhead).
- Floor may be modified, provided original door sills and
rocker panels are retained.
- MOdifiCationS are permitted to fit a substitute transmission.
Spare wheel, required safety equipment, communications gear, and ballast are the only other components
which may be installed in drivers compartment.
(c) Mechanical Cohponents:shail not protrudeoutsidetheoriginal
coachwork except inside the fenders.
i) Engine:
- Original approvedlhomologated cylinder block must be
retained. Displacement may bechanged through boring,
I
28
-
-
-
-
sleeving. stroking or de-stroking. Engine may be relocated within original compartment, but centerline of
crankshaft relative to chassis must be maintained as
Standard
Cylinder headsare free, exceptthatthesystemof cooling
must remain the same as for the original homologated
model.
Suparchargen may be installed: however engines so
equipped will be rated at their actual displacement
multi~liedbv 1.4.
iil Transmission: Free. exceot that the drivino wheels must remaon as on the orlginal modal, and QearDOx must reta n
tts orog nal baslc or entatlon to the otner mechan cal components.
iii) Other mechanical components: free, except the original
orientation of all engine and drive train components must
be retained.
(d) Suspension:
- Original typaof suspension must be retained (i.e., McPherson. solid axle, trailing arm, etc.).
Wheelbase must be retained as oriainai.
Chassis mav be reintorced.
PIYOI points may be modol!ad or relocetea
Sprongs and shock abroroers are free
A arms and other such components may be reinforced or
replaced.
(e) Sleeting: Free.
(1) Wheels and Tires: Maximum p r m i n e d complete wheel widths
(i.e.. widest pan of the mounted tireandlor rim) relatetoengine
displacement as follows: otherwise free:
up to 1WO cc 11 in.
1 3 W c c - 12 in.
16Wcc - 13 in.
2000 cc 14 in.
M W cc 15 in.
over 3WO cc 16 in.
(tolerance: Ih in.)
(g) Brakes: Free.
(h) Fuel Tanks
Safety fuel cells required per FIA Standard FF3 or FFA.
Must be located outside the engine and driver c o m p r l ments.
Musf be protected by a metal bulkhead separating tank
from driver compartment.
-
-
-
I
I
-
(i) Aerodynamic Devices:
F=tMbWBorMax20cm
R=2WbWBorMax40cm
Aerodynamic devices
must be Inscribed within
frontal projection.
Asrodynamic devices must not extend beyond the frontal projection of the car (see diagram).
Front swilerlair dam mav not exceed 10K of the wheelbase of the
car. or a max mcm of 20 cm (7 87 in I. measured from the front
extremity of tne coacnwork, and must be located wlow tne centerline of the front wheeihubr.
Rear spoiler may not exceed 20% of the wheelbase, or a maximum
of 40 cm. (15.75 in.). measured from the rear extremity of the
coachwork.
Alternatively. GTX Category cars may be fitted with aerodynamic
devic~swhich Conform to the rules for iMSA GTCategoryandcontained in Art. 7.1 (v)
-
11.4.7.3
UL-AMERICAN GT' (AAGT)
IMSA has deve oped rbles 10 encourage the dsslgn, connructfon
and Comwtition of GT-type racing cars based on other components. Eligibility of makes, models and engines, and combinations
thereof, is controlled by IMSA.
AAGT cars may be modified to the limits prescribed for the GTX
Category in AR. 7.2 plus these additional latitudes:
(a) Coachwork-Chassis:
- Hood SCOOP may be added to accommodate the induction system; maximum height: 5% inches above the
olane of the standard hood.
Maxomum overall wtoth 210 cm (83 inches)
Fender flares may extena nta the oaar panels lor on*
thord lhe total ongltJdlna lengtn of the door (1 lnch
tolerance).
Inner fender panels may be modified or replaced with
others, but may not be removed.
Coachwork may be lightened and reinforced freely provided the external shapes, dimensions and orientation
of the original body shell. doors, windows, rocker
panels, hood and deck lids are maintained.
- Chassis is free o n condition that standard wheelbase
is maintained.
-
30
(b) Drlve Train: reorientation is permitted to accommodate a
combined gearbox-final drive (transaxle).
(c) Engine: may be repasitioned such that all elements of me
cylinder black must lie ahead of a vertical plane touching
the foremost edge of the windshield base. Firewall may be
relocated accordingly. For models in which the standard
engine location is furlheraft, theenginemust lie within the
limits of the standard compartment.
Supercharging is limited to cars withenginedisplscement
of less than 6000cc.
) Wheels: Maximum wmplete wheel width (sectionwidth)
for:
cars under BMX)cc: 20 inches
cars ousr MWX)cc: free
-
11.4.7.4
GT Pralolyp U n (GTP)
11.4.7.4.1
DeRnnlm
IMSA has developed rules for cars known as GT Protorypes (GTP).
GTP cars Shall be two-seaters conceived primarily for wmpetition
in closed-circuit races. They shall carry all equipment for normal
road use as well as all contemporary safety devices. GTP cars
need not meet any minimum production requirement nor beoffered
for sale to the public.
GTP Cars may also derive from approved makes and models
modified beyond lhescopeofthe rulesunder which they normally
Compete.
Drovided
they remain within the srxrcifications for GTP
.
.
cam.
IMSA will act as the final authority on eligibility of cars and
interpretations of these GTP rules.
11.4.7.4.2
Englns Etlglbilily
IMSA Gill regulate the eligibility of engines for use in GTP cars.
Approved engines may derive from seven basic origins, as follows.
1) High-volume production. 2-velvelpushrod engines. Minimum
production: 10,000. Specifications per 1979-80 MVMA or IMSA
homologation forms.
2) High-volume production. 2-valvelohc engines. Minimum
production: 5,000. Specifications per 1979-80 MVMA farms.
IMSA homologation forms, or FIA Group 113 homologation
forms.
3) Standard block engines from (2) fitted with 4-valve cylinder
heads. Minimum production: 400. FIA Group 214 homologation
forms.
4) High-volume production rotary engines. Minimum production:
5 . m . 1979-80 FIA or IMSA homologation forms.
5) Racing engines
normally aspirated conventional engines.
no minimum production.
-
31
6) Supercharged production engines, 2Yalve/pushrod t a m (1)
or 1979-80 FIA-homologated Group 1 engines.
7) Supercharged racing engines.
11.4.7.4.3 Engine Modiflutbns
Displacements desired may be achieved by boring, stroking,
sleevlng or destraking. Production-type engines described in
paragraphs (1). (2). (3). (4) and (6) may additionally be prepared
and tooled per Art. 7.1. Production-type engines described in
paragraph (1) may be fined with heavy-duty cylinder heads of
standard design offered by the manufacturer. Crankshafts, rods.
valves, camshafts, bearings, pistons, rings, gaskets, mountings,
other internal parts and accessories are free. Valvetrain girdle
may be added. Original cylinder block must remain identifiable.
11.4.7.4.4 Minlmum WelghhIMaxlmum Dhplaeemenh
IMSA has developed the following table of equivalences based
on the estimated power outputs of the seven engine types.
MAXIMUM DISPLACEMENTS IN LITERS @
ENGINE TYPE
7W KG
800 KG
900 KG
(1)
3.5
4.5
6.0
(2)
2.5
3.5
4.5
(31
2.0
3.0
3.5
14)
2.5
3.0
3.5
(5)
2.0
2.5
3.0
(6)
2.0
2.5
3.5
(7)
1.0
1.3
1.5
Minimum weights are taken with the oar race-ready but without
fuel or driver on board.
All GTP cars will race in one category regadless of displacement
or weight.
11.4.7.4.5 Chas.1.-Body
(Rebr to dtagram, page 34)
a. Wheelbase
Frse. See fallowing rules on overhangs and
body length.
b. Overall Length -Maximum: 480 cm (189 in.).
E . Overall Width
Maximum: 200 cm 179 in.1.
d. Overhangs (tnclus~veof any bumpers) Front plus Rear Overhangs must not exceed BOlb of wheelbase.
- Difference between Front and Rear Overhangs must not
exceed 15% of wheelbase.
e. Ground Clearance Minimum: 6 cm (2.5 in).
NO part of the Car may touch the ground when any one of
its tires is deflated.
it is not permitted to improve the aerodynamic efficiency of
the car by installing any longitudinal. transverse, sliding,
flexible or retractable device between the body and theground.
-
-
-
-
Total Height -- Minimum: 100 cm (39.5 in.) above ground level.
Maximum: 110 cm (43.3 in.) above ground level, measurement
taken with full fuel tanks and driver aboard.
Inside Room -- Minimum elbow width at the front seats:
130 cm (51 in.), measured between the interior planes of the
doors. Driver end oassemer seats must beableto beoccuoied
Y!rnLltaneously. ana shall be located symelrocallyon sother slde
of lne Centerlone of the car No component may lntruoe onto
tnese spaces Drlvefs feel mLsl oe ocatea all of the venocal
plane formed by the front axles.
TWO doors must be provided giving ready access to driver
and passenger seats. Both doors must swing open on hinges
mounted an front door post, and in the case of s closed ear.
must have release mechanisms operable from both inside and
Outside the car. Minimum dimensions for the lower part of the
doors: 50 cm (20 in.) horizontal and 30 cm (12 in.) vertical.
Doors must not obstruct the lateral vision of the driver.
Windshield-shall be constructed of laminated glass, provide
all normal functions of Yisibilitv. orotection and aerodunamics.
and have a minimum lateral width over a 10 cm (4 in.) band at
driver's eye level. of 95 cm (37.5 in.).
Rear Vision -- Effective rear vision mirrors shall be fined.
Air intakes--ma"
.~ of the bodvwork
~, orotrude from the olane
~ ~ provldea lhey 0 0 not mpair the rlrlon tneld 01 the drtver. Air
.ntake~mu91 be no hlgner than the hognest point 01 the roof or
windshield. whichever is higher.
Aerodynamic Devices Spoilers, deflectors and otherdevices
may be installed on the bodywork only, as follows:
1) if located above the plane of the wheel hubs, they must fall
at least 5 cm (2 in.) within the outside perimeter contours
of the car as viewed from above. and are no higher than
the highen p r t of the car.
2) if located below the plane of the wheel hubs, they muat not
protrude beyond the outside perimeter contour of the car.
3) regulated otherwise by the rules for overall length, width
and overhangs.
. WheeisITires - The number of road wheels shall be limited
10f0~r:allrimsshall beof thesamediameter. Max~mumcompiete
wheel width (section width): 16 in. Spare wheel, if carded.
shall be of a size similar to one of the road wheels and must
be carried in its own Compartment outside that of the driver.
2 operating headlights. 2 taillbrake lights and
Equipment
windshield wiper are required as a minimum.
Fenders--shall ettectively cover the whole widths of Me wheels
and tires tor at least one-third their circumference.
Oil Tank-is limited to 20 liters capacity.
~
~
~
~
~
-
~
~
~
~~~
~
-
--
33
~
~
~
~
~
,
mery--must be located outside driver compartment.
Ore*...,
3 Safety Devices
a. Roll Cage is compulsory. Material and construction specifications of recommended designs are contained in Appendix
J, An. 253(e) and in these rules.
b. Safety Fuel Tanks meeting FIA Spec. FT3 or FTA are required
and must be mounted outside the drivers compartment and
Drotected as far as ~racticabfebv the roll cam. Maximum
capacity: 120 liters (31.7 gal) in one or two tanks. Dry-break
fuel fillers and vents are required to prevent spillage.
C. Firewalls constructed of metal must be installed to isolate the
dri~erlpa~sengerc~mpartmentfrom
the fuel tanksandfromthe
engine compartment.
d. Energy Absorption Devices are recommendedto befittedalong
the exterior vertical walls of the frame box members to protect
the driver end fuel tanks. They shall not, however, contain
mechanical components such as pumps, filters, pipes, etc.
e. Driver Seat shall be mounted securely to the frame or roll
cage structure, but may be adjustable.
1. Six-point Driver Restraint System must be installed.
g. Scattershield or expioslon-proof bell housing are required
on cars where failure of the clutch/flywheel could create a
hazard to the driver.
h. On-boardfire extinguisherof the inert gas typewithaminimum
capacity of I 0 lbs. (Haionor Freon) is required. Trigger must be
marked with red circles with letter 'E' and operable by either
the driverorfrom the outside thecar. Outlets should bedirected
into the driver. engine and fuel compartments.
11.4.8 EII~I~IIIQ
LIS~
IMSA will regulate the eligibility of makes and models to compete
In the IMSA GT Category.
11.4.8.1 GT Dirlrlon, Over 2.5 LHers (GTO)
Makes and models homolagated by the FIA under Appendix J
Groups 1thrOUgh4since Januaw I.1969, plusthefollowingmake$
and model* recognized by IMSA:
Chevrolet Corvette 350
(5772)
Datsun 2802.280ZX. 280 ZX Turbo
(2780)
(4949)
Ford Mustang (1979-80)
Mustang Turbo 2.3
(3220)
(5343)
Jaguar XJS V-12
Mercury Capri (1979-80-81)
(4949)
Turbo RS. 2.3
(3220)
11.4.8.1.1
Notes
1. It is permined tofit replacement bumpersandfrantspoilermsde
of optional material.
2. Pomche RSR Carrera is permitted optional crankcase part no.
930-10191400. 930-10191500 Or 930-10191600. and crankshaft
part no. 930-10201400 3.5 liter displacement.
3. Supercharged models may be regulated as to specific configurations and induction systems. Displacement will be
rated at 1.4 times the actual swept volume of the cylinders.
4. It is permitted to utilize approved, alternate heavy-dutycylinder
heads of standard design, offered by the engine manufacturer
through his normal sales outlets, and bearing the manufaoturer's part number. By standard design is meant the same
number and location of valves, ports and spark plugs as the
original.
5. Triumph TR6 may use optional crankshafi with 3.100 stroke.
11.4.8.2 GT Dlvlrlon, Under 2.5 U t e n (GTU)
Makes an0 moue o nornologated by tne FIA under Appenalx J
G r o ~ p sIInrough 4s nce Jandaw I.1969, plusthelo 10- ng makes
an0 moues recognozed by IMSA
Datsun 2402. 2602. 2602
(2429)
280ZX
(2429)
Ford Mustang (1979-80)
(2300)
Porsche 914-6
(2467)
11.4.8.2.1
Notes
1. Datsun 2602,2802 and 260ZX models are permitted the2429cc
engine as used in the 2402 model.
2. Mazda RX-7 is permitted optional peripheral portrotor housing:
with carburetor induction.
3. PorSehe 911 is permitted to use 2.7 chassislbody.
4. Models with displacement less than 2000 cc may be fitted
with 4-valve cylinder head of any origin.
11.4.8.3
Experimental GT Divlslon (GTX)
Makes and models homologated by the FIA under Appendix J
Groups 1through 4since Januaryl. 1969.plusthefollowingmakes
Ferrari Boxer 512
and models recognized by IMSA:
Approved makes and models.
AMC
B~ick
Chevrolet
Dodge
Mercury
Oldsmobile Plymouth Pontisc
Shelby
-
- AMX
-
-
-
Datsun
Ford
Concord
Gremlin
Hornet
Javelin
Spirit
Skyhawk
Carnaro
Corvette
Monza 2+2
Nova
Vega
Challenger
DartIDemon
DarVLite
Mirada
280ZX
Mustang I1
Mustang 79-80
pinto
Bobcat
Capri
Cougar
Ststfire
Barracuda
Duster
Feather Duster
Astre
Sunbird
Firebird
Firebird Trans-Am
American GT 350
Approved Engines
Ford Mtr.Co.
AMC
ChrySler
Corp.
- 304
-
360
390
401
- 318
- 340
-
-
-
355
- 360
Datsun
-
426
440
-
260 ZX (26)
Gen'l Mtrs.
- President V-8 (4.5)
11.4.8.4 All-American GTa Dlvlrlon (AAGT)
a. Any approved engine may be installed in an approved model
produced by the same parent manufacturer.
b. Engines may be bored, stroked. sleeved or de-stroked to
achieve the desired displacement.
C. Supercharged engines limited to BMK) cc displacement.
-
37
255
302
351
390
427
428
429
Escort 1.4. 1.6
Fiesta 1.7
229
231
260
267
305
305lAluminum
350
350lAluminum
396
400
427lAluminum
454
455
231 Turbo
11.4.0.5 GT Pmtohpe (GTP)
Engine Eligibiliv - Partial I i s t ~ I M S Amay approve other englnes
uwn application. (Ref: Art. 11.4.7.4, para. 4)
Type 1 AMC V-8 304. 3M)
Chevrolet V-6 173, 229
V-8 2MI, 267, 305, 350
Chrysler V-8 318. 3W
Dstsun V-8 President 4.5
Ford V-6 2.8
V-8 255. 302. 351
Triumph V-8 3.5
Type 2 Alfa Romeo L-412.0
BMW L-412.0, L-612.6, 3.0
Daimier-Benz L-61280, 300. V-8 350.450
Datsun L-412.0. L-6/280ZX
Fiat L-412.0
Ford Escort L-411.9
Porsche 9115 0-612.7
924 L-412.0
928 V-8 4.5
Toyola L-412.0
Type 3 BMW L-4n.O 4-valve
L-613.5 4-valve
Dabun L-4n.0 4-valve
Ford Cosworth L-4 BDA &valve
Toyola L-412.0 +valve
Type 4 - Marda Rotary RX-2. 3. 7 2.3
RX-4 2.6
Type 5 - Brian Hart L-412.0
Ford Cosworth V-8 3.0
Other F.1 3 liter normally-aspirated engines
Type 6 BMW L-411.6. 2.0. LW2.5. 3.0
Chevrolel V-6 173, 229. 231
Daimler-Benr L-81200. 230. 280. V-8 350
Dateun 810 L-612.4
Toyota L-411.6, 2.0
Type 7 F. 1 1.5-liter Turbocharged engines
-
-
-
-
-
11.5 IMSA RS (Raclng Stock) Category
11.5.1.
Purpose
This category is intended to promote interen in race competition
lor v o l ~ m e p r o d ~ c estock
d
cars available l o the American public;
l o aenerate Dublicitv for Com~etinadrivers. entrants and manufact~rers.to encourage ind voauslr to MCOmeacllvecOmpet tom
an0 to enab etnem to compete fnprolessoonalracesrrlthrelst~vely
modest nvestments and melntenance costs
M
1152. Ellglblllty
IMSA W i l l recognize specific makes and models of cars eligible to
compete. To qualify, a model must be:
- Produced and marketed in sufficient volume so that itsspecifications are standard and mav be easiiv checked. and so that
carsand spare parts may be oblalneo easlly.
Marketed to tne pub1.c in lne JSA.
A b l e l 0 ~ e ~ t 4 a ~ e ~ a g e - ~ ~ z e o a a ~ I t s ~ 0attnesametime
ml0naol~
as sold to the public.
Produced With an integral hardtop.
Maximum engine size of 4 liters.
11.5.3. Conlbuntlon
"
IMSA RS ears must conform to standard oroductlon conflouratlon
01 the bas,= mooe Except where tnese rd.er allow rnadof~eat~ons
or
¶ ~ b s t ~0"s.
I ~ ta1 components of the cars mucl oe ldenllcal totnose
produced by the manufacturer and delivered to the public in the
USA on the basic model recognized. Standardappearancemust be
maintained strictly. Each model will have a recognized official
weight which must be met or exceeded as raced with full tank of
fuel but without driver.
11.5.4. Saletv R e a u i n m n t s
A Doors must oe ponned or bolted shut, but may not be we d w
P ns or oolto mLst beeasvly removableand doors mLsl operate
on Orlglna hlnges when the pons or bolls are remo$ea
B. Fuel cell must be located as closely as possible to the original
tank location. Metal bulkheads must be installed, if none exist,
to separatethe driver's compartment from the fuel cell and engine compartments. The bottom of the fuel tank may not be
located below the centerline of the rear axle.
Maximum fuel capacity is 22 gallons.
C. Fireextinguisherof at least 2314 lb, capacity mustbecarriedin
the car. On-board fire extinguishing system (Freon type of at
least a 4 lb. capacity) is recommended.
1155. D p n o ~Modification¶
l
A. Bodywork:
1. Accessories, lights, gauges and switches may be added or
removed and other interior modifications made for theconvenience and comfort of the driverprovidedthereisnoeffect
on the c a h mechanical pertormance. Driver's seat may be
replaced.
2. Cables and lines may be rerouted and protecled.
3. Standard Inner fender material may be reshaped.
4. Headliner may be removed. Bumpem and brackets must r e
main asoriainal but mav
or backdatedwithinthe
, be uodated
.
mooe range recognized Front door glass and regulators
may be remove3 A I otner glass must remaln and tbnct on
-
. .
as Originally installed. Interior door panels and trim panels
must be fitted but may be modified to clear roll cage. Panels
mav be mounted with screws or other fasteners but mav not '
cover ooeninas where window oriainaliv ooerated. Panels
may oe mane of s,ostltute matella1 lmelal or f oerglarr) r e
lemb ,ng orog nal pane r and palnted to matcn nternor
5 Parkong I gnt lenses may be removea andtneorlgrna openings used for ducting to brakes.
6. Thestandard sheet metal panel betweenthegrilleand radiator may be modified to accommodate larger radiator, oil
cooler and ducting.
- .
7. Aerodynamic devices are limited as follows:
Front: Approvedfront airdam offered by themanufacturer
lor the model raced or through aftermarket sources. Orelse
a flat, vertical front spoiler made of sheet metal may be installed below the lower edoe of the front bumoer. These
dev~cesmay oe rented for Drake coo inq 0 . ~ 1 ~an0 mbct
provnde for a gr0.no c earan'e o l 4 lncner a 9 race0
- Rear Approve0 spofler offered by the man~fsct.rrr for the
model raced, or through aftermarket sources, or else a flat,
vertical rear spoiler measuring no more than 4 inches in
height may be attached to the rearmost surfaceofthe trunk
lid. Rear spoiler may be only as wide as the trunk lid, plus
or minus 2 inches.
-
6. Chassis-Tires-Brakes-Wheels:
1. Suspension springs are free, provided they are of the same
typeasoriginally fittedandareinstalied inthestandardposition. McPhersan strut-equipped cars may have the upper
strut mount replaced with a slotted plate for camber adjustment. (It is not permitted to thread the strut Or shock absorbers to make the spring perch adjustable.) Shims may be
used l o adjust spring height. Conventional rear spring
shackles may be made adjustable. The upper ball joint retaining holes on Opels and Chevettes may be sloned for
camber adjustment. Shock absorbers may be altered or replaced with others installed in original supports and
brackets. Anti-sway bars, torque rods and similar devices
may be added or substituted. Heim joints are permitted on
anti-sway bars and factory adjustable front suspension
parts. Riding height, measured at theundersidecenter ofthe
rocker panel, must be maintained at7" + 1"as checked race
ready with fuel but without driver.
Axle-locating devices may not pass through body panels.
2. Standard steel wheels or any other steel wheels of 6 inches
or less in width may be used on models with official weights
40
less than 2250 ibs., and 7 inchesor lesson models2250 lbs.
07 more. All four road wheels must be identical. Wheels
may be strengthened. A tolerance of 1 112 inches from the
specified standard track dimension is permitted front and
rear. Spare wheel may be removed.
Track is measured as racedstthecenteriineofthewheels.To
provide for tire clearance, it is permitted to reshape the
original inner fender metal: however, no external modifications to the fenders are permitted.
3. All cars must be equipped with IMSA-approved radial ply
tires of a type marketed through normal retail outlets for
ordinarystreet use by the public. Noracing or recapped tire-s
are permitted.
4. All Carsmust be equipped either with standard brakesasdelivered for the makeand model, or brakesolany origin which
do not exceed the following criteria:
Front: Calipers must be iron production-type.
Rotors for cars with under 3000 cc displacement limited
to l o inch maximum diameter.
Rotors lor cars with 3000 cc or greater displacement
limited to 10% inch maximum diameter.
- Rear Drums for cars with under 3000 cc displacement
limited to 9 x 1% inch.
Drums for cars with 3000 cc or greater displacement
limited to 9'h x 2 inch.
The following additional brake modifications are permitted:
Any dual master cylinders and prassureequalizingdevices
may be used.
Lining material is free.
Backing plates and dirt shields may be ventilated or removed andairducts installed provided no modificatiansare
made in the body work. Brake ducting inlets with areas of
no more than 12 sq. in. per sideare permitted at thefrantof
the car below the body work provided there is no effect on
the aerodynamics of the car.
- Airduetswith inlets01 1 2 s q in. persidemayalso befitted
to the rear brakes.
- Hand brakes may be removed.
-
-
C. EIeCtriC~lSyst~m:
1. Battery may be replaced with another of originalvoltageand
size and installed in the standard location.
2. Any make of ignition coil, condenser, spark plugs, fuses,
relays, and regulators of original type may be used.
3. Any banery ignition system may be used.
4. Alternator must function as originally intended, but may be
replaced with another of different manufacture.
41
D. Enoine and Drive Train:
1.-~nginsanddrivetrain must beas p r o d u d incambination
with body and chassis of each recognized make and model.
Except where these rules allow modifications or substitutions, ail components must be mounted in standard locations
and conform to standard dimensions. It is perminea to
machine any component of the engine provided such component is always identifiable as a standard production part,
except WhereMeSerUieS requirethat standarddimensions be
preserved, such as cylinder bore, stroke, inlet and exhaust
ports. carburetor base opening, etc. No material or mechanic d extension mav be added.
2. Cylinder head may be ported and polished; however, inlet
and exhaust port sizes at the manifold face may not exceed
thedimensionsspecifiedforthe modelengineconcemed. On
rotary engines, inletandexhaustports maybe modifiedatthe
combustion chamber but must remain original in sire and
Configurationat themanifold face. If the ports arechamfered
at the manifold face, the port size will be measured at the
innennost part of the chamfer.
3. Engine may be clearanced (blueprinted) and balanced.
4. Pistons and Piston rings are free. A tolerance of ,030'' in
Cylinder boremeasurement isperminedon reciprocatingpiston engines. On rotary engines. Mestandard rotorasdelivered on the U.S. model may not be substituted or modified.
Material of seals is free
5 The valve lraln (conslsllng of camrhatt lhftera, follorers.
Dusnrocs SPrfngs,keeoers.reta.nersandva ves) lofree however tnelr basoc lype and the locat ons ot valves and camshafl(s) may not be changed.
6. Induction System-IMSA may control t h e induction
systems of various makes and models. Unless otherwise
noted:
On engines larger than 2000 cc displacement, the standard
carbu~etormay be modified by machiningthethronleshan
and butterfly, changing the jet sizes (not jets), and altering
the float end mainventuri. Emission controldevices,choke
mechanism and air filter may be removed. It is expressly
forbidden to drill or othemise alter any pasageways, add
any material, install a spacer block betweencarburetorand
manifold, eniarge the carburetor base opening, add
velocity stacks or to make any other alterations which
change the intrinsic design of the standard carburetor.
On engines with displacement between 1M)O ce and 19W
CC, it is permitted to Useany carburetor with thesamenumber of venturis as the original, and any intake manifold.
Othenvise, carburetor may be modified as for engines
~
-
-
42
~
larger than 20W cc.
- On engines with a displacement larger than 1900 cc and
less than 2000 cc it is permined to use either the standard
Carburetor, modified and fined according to theruleforengines larger than 1900 cc; or It Is p n n l t t e d to me e Holley
Model 23W List No. R.4412 500 CFM-ntedcarbuntorand
any manifold.
This alternative is also permitled for modeisdelivered with
fuel injection as standard equipment.
On engines of less than t6M) cc displacement, i t is permined to use any carburetors, intake manifoldandvelocity
stacks.
On rotary engines. emission control devices and choke
mechanism may be removed. Thefioat bowls may be vented to the exterior of the carburetor; however, no other
modification may be made to the standard carburetor.
If an air filter is used on any of the above engines, it must
b e o f a conventional typeusingastandardeiamentthrough
which all air to the Carburetor must pass.
On fuel-injected engines, thestandard componentsmay be
adjusted but not modified in any manner nor replaced with
Other IYDBS.
7 E x n a ~System
~t
#sfree Outlels mdst be located aft of the
moo-potnt of the wheelbase No bodywork modltlcatlon 1s
permitted.
Exhaust megaphones are not permined. The exhaust pipe
cutlet mu* be the same size as the exhaust pipe.
Rotary engine cars may use an IMSA approved muffler.
8. Oil Sump and ail pickup may be modified to increase oil
capacity and to prevent surge, but no dry sump system may
be used. Standard oil pump must be retained. "Accurump"
may be fitted.
9. Vents. breathersandoil filters mav beaddedorsubstituted.
A s ngie o cooler on the englne is perm tted, provlaed it o
r
mo~nted
wltnlntheeng necompartmenl (tnatts, betweenthe
Inner fenders, flrews, an0 gra 0 and 11 s no1 vosoble from the
exterior of the car.
10. Any radiator which will fit the standard location and does
not alter the c a h appearance may beinstalled and shrouded.
Fan blades may be removed.
11. Fuel pumps are free in type, sireand number, but may not
be located in the driver compartment.
12. Any ring and pinion ratio may be used provided the differential housing lorthemodelis retainedandnotmodified.Differentials may be modified to produce a limited-slip or locked action.
-
-
.-
Ditferential oil cooler may be installed provided it is mounted
within the confines of the bodywork but outside the
driverlpassenger compartment.
13. Heater may be removed.
14. Clutch may be replaced with one of the same type, size.
number of discs, weight and manner of attachment but of
different manufacture.
Flywheels are free.
15. Cars delivered with Standard displacement less than 1400
cc are permitted to bore andlor stroke up to 1400ccand are
permitted 5 speed gearbox, if available to customers from
manufacturer's catalog.
E. Non-Standard Components:
The following components may be added or replaced with
others of any origin:
- Nuts. bolts, screws, washenandothersuch fastenen, induding safety wiring
Any bearings of standard dimensions and type
- Bushings
Electrical wiring
Pulleys
- Gaskets and seais
Drive belts
Fuel and brake lines
-
-
1981 RS SEDAN ELIGIBILITY LIST AND SPECIFICATIONS
om",024
omni
Aelrmt
Coil
Colt
ill@
2200
1191
1BB)
lBMIIm
,897
mi
3681
I 2 1 S V " COUP.
,>a SIXmCouOs
I28 Span COUPS
(28 Sedan
84.0 18.2 2 bbl
2zm
lbil 68.0
840
mo
fmnl Wh-l
Mi*"", 2"
Drim
77.0 8 5 0 MI*"", I"
BC1 I M B HOIIV 1Y
-hR
ten,
4
1-
I
11.24
,660
lam
,m
,em
ISULU
MII b
o
y
SOHC
(
umr
F1
2300
FLO
Barn FI
2
m
a!
7
7-
4.8.24
I=
RX1
ex.
m
11
z,w
LilC
m
.-~
YE-
1830
eo-,
m
so-t
2,-
LI
a
m
( O l d ,112
2474
XUS
I
I
87M
ne
9
S Ml
2W
tsa
W
,897
,897
03.0 11.8
,897
1 . 0 W.8
N
lam
wo
n
-1
2Y
s o soa
MJ
NOTES
?mo
,m
m. mo
1dd7
m4 1w.6 WIW
1M)
me -.o
2m)
U.0 m.0 UllUd 2"
9*i
llld
lW.7
w.0 n.2 1sa
07.6 77.0
,716
1241
-71
l4D
161
2471
2&S
at
2.7,
m
1.0
I D m.9 N
107.11 7 1 2 n
10<.11 16.2 2MI
I D 16.2 2 M
1
oss 1.4 n
iot.6 76.z n
mP m.0 2"
(v
I Same ,nduetlon rLles as lsOO cc to 2000 cc cars
2 AMCmode r per A n 10 5 3- It is prmlnedtointerchangssnglnes.
engine pans tranam $$Ion pans and transmass on3 among all
three models.
3. Cars equipped with carburetor may reduce weight to 2100 lbs.
4. Free carburetion is permitted.
5. May use AMC
service X8127382, Production X3228973 or
AMC X8129173.
6. Five speed transmission is permitted.
7. Front and rear disc brakes are permitted.
8. Competition cylinder head but not cross flow is permined.
9. For all 1600. 2WO. 23Wand 2800cccars. thechassisand runnina
gear laclory pans are lnlerehangeable All models may use the
2800 cc w th assoc~ated2800 cc weights
10 Four speed transmoss on 0% permolted
1
/
/
1
/
1
;
I t . For AMC Pacer. Hornet. Gremlin, Concord and Spirit, it is permitted to substitute axle housing Part U4486539 Or #4489003 and
associated parts i n order t o avoid axle breakage problem
experienced with standard equipment.
12. Datsun 6210, 610, 710, 200SX. Ref. Art. 11.5 5D1. The Datsun
differential part U9996K4050 may be used.
13. Competition cylinder head is permitted.
14. LUCaS metering unit #54073048and related injectors may besubstituted for the Bendix electronic fuel injection unit.
15. Datsun 2OOSX and 510 ('78) models. Optional transmission
part lt32010N 3220 may be fitted.
16. Same induction and carburetion as 1600 to t 9 W cc cars.
17. GMC cars equippsd with the 231CiD V-6 engine are restricted
to the Rochester 2GE 1-2BBL Carburetor. barrel size 1.437.
These engines must also use a 1.25 in. restrictor plate for both
barrels. The restrictor r late is to be made of ,040 to .OW metal
and installed next to carburetor using standard thickness gasket.
NO spacen.
18. May backdate and use '78 Mustang I1 4-speed transmission
and differential.
19. May use Cspeed BMW (GETRAG) transmission part U23-00-1208-475.
20. Maida RXZ and RX3: m e carburetor vsnturis are restricted in
size to 20mm for the primary and 25mm for thesecondary. mesa
vsnturis must be the same shape and design as the original
venturio.
21. The induction system may not be changed in any manner from
the Production model, other than the alteration of the float and
jet sizes.
22. All cars using the232cu. in. enginewill usetheCarterYF-1VlBBL
carburetor.
23. Volvo 142 model may use Voivo piston kit U552450 to increase
displacement to 2 1 5 0 mamaximum.
~
24. Models produced with a standard displacement less than 14W cc
may be enlarged to 1400 cc by boring or stroking, and may be
equipped with a -peed gearbox if available to customer and
described in catalog from parent manufacturer.
~
~~
~~~
11.6 IMSA "AMERICAN CHAUENGE" Category
11.6.1. Purpose
This category is designed to promote interest in race competition
for American-built, volume-produced sedans marketed to the
public thrOUghoUt the U S .
IMSA wiii recognize driver and manufacturer champions in an
annual Series of races for these cars.
1 . 6 . Eliplblllty
IMS.4 will recognizerpecilic makesand modelseligibletocompete
and wJUap~rov~thespecificalionsforeach.Toquality,amakeand
model must be:
manufactured by a U.S. company and marketed as a 1975 or
later model:
- equipped with a standard engine smaller than 6000 cc (366 cu.
in.) displacement:
- a standard P d w r o r 4 d w r &an designed toseatat least four
adults.
11.6.3. Configuranon
Official MVMA Specifications Formsfor1975and later models will
be used as reference for technical data.
EXCBD~
.
modificationsor
- - substi.
. where these rules allow soecific
IJI on$, a I components m a t be oaenlcal to tnosa delovered by a
manufacturer to its L S c.aomerr. Standard appearance murl be
maintained strictly.
1 6 . 4 OUklal Weight
IMSA will specity foreach makeand modelenofficial weightwhich
must be met or exceeded as the car is raced, with all safety equipmen?in place and with a full fuel tank, but without driver. Any ballastcarried must besecureiyboltedtothsfloorin thespaeefarmeriy occupied by the right hand front passenger seat.
1 1 . 5 Required ModBkatlons
A. Doors must be securelv bolted or Dinned closed to orovide
Structural integrity and to preventtheir opening in theeventofa
crash. Standard
hinoer
remain and
. - a~
- - must
- -~
- - be
-~ ooerative
- - ~
~ ~ . ~
B rloods an0 aeCI lhds m ~ sbe
t secured woth plnsor Plraps hooa
and t r d h as m.sl oe aD e l o oe openea from oulsnde the car
Latches may be removed. Standard hingesandspringsmustre
main and operate as originally intended. Hatch-back must be
securely wnneu c orea
C Maxlmum lue cspac ly 32 gal onn far 8 cyl models and 22
ga ons for 6 cyl models I t s recommendea tnat the luc llller
be installed on vertlcai surface of the rear quarter panel away
from traffic, and further that it be mounted so that it may be
changed from one side to the other to accommodate ditferent
tracks. Fuel cell must be installed i n the standard location as
cioseiy as possible. A steel bulkhead with minimum thickness
of 22 gauge (032 .035 in.) must be installed tosealcompietely
49
-
~
~~
~~~
~
~
~
-
~
~~
~
~~~
!
i
1
the fuei compartment trom the driver compartment, Bottom of
the fuei cell may not be located more than 2" below the lowest
pan Ot the rear body panel. A hole may becui in thetrunk floor
to install the fuel cell.
D. Fire extinguishing spstern of the Freon type with a capacity of
at least 10 lb. and able to extinguish a tire in thedriver'sengine
and fuel compartments must be installed.
11.6.6 Other Modllications
A. B o d w o r k
Except as authorized in these rules, all elements of the body must
remain and function as produced by the manufacturer.
1 . ACCe~~ories.lights, gauges and switches may be added
or removed. The arlglnal instrument panel must be used
or a replacement Panel o f the same configuration. The
instrument cluster may be modified to accept new gauges.
Other interior modifications may be made for the convenience and comfort of the driver provided there is no effect on
the Car's mechanical performance or appearance. Driver's
seat may be replaced. Headliner may be removed.
2. Cables and lines may be replaced. re-routed and protected.
3. Undercoating may be removed.
4. Bumpers must be installed in standard locations, but brackets are free.
5. Glass - Original windshield must be retained. Front door
glass and regulators may be removed. All other glared
Surfaces may be replaced with lexan.
6. Fenders may be flared if necessary to cover the wheels and
tires for their full width by stretching the original material or
by adding a brow of any material. Original wheel arch shape
and dimensions must be maintained. No slots, ventsorother
modificationswhich anerorconfusetheoriginalappearance
are permitted. Inner trant fender panels may bemodified but
must enclose the engine comDartrnent comoietelv without
~-~
gaps or void s p a c e s ~ lbodyand
l
trim rnouidings installed
on the vehicle as it is sold to the public must be retained.
7. Aerodvnamic devices are limited as follows:
-~
- Front: Approved spoiler as delivered on the model to the
public, or a flat. venical front spoiler made of sheet metal
may be installed below the loweredgeof th$ front bumper.
Front spoiler may be only as wide as the canterline of the
front wheel track, and must provide tor a 4w ground
Clearance as raced. Spoiler may be vented for brake
COOilng ducts.
.
~~
~~
~
~
~
- Rear: Approved spoiler as delivered on the model to the
public, or a flat. vertical, rear spoiler made of sheet metal
and measuring no more t h a n 4 in height may beattached
50
to the rearmost surface of the trunk ild. Rear spoiler may
be only as wide as the trunk lid 01"s or minus 2".
8. A screen may be installed behind the grille to keep foreign
objects trom damaging the radiator. Minimum sire ot screen
mesh: 118".
9 Thestandardsheelmetal panel between thegrtlleand radlato1 may be modltled to accommodate larger ,adlator, all
Cooler and other ducting.
B. Chassis Tires Brakes
1. SUSpenSion springs are free, provided they are of the same
type a8 originally fittedand are installed inthestandard position. Rear spring shackles arefree.Shimsmay beusedtoadjust height 01 front and rear coil springs. Weight jack bolts
may be installed, provided thestandard outside appearance
Of the frame areas is retained. Only the screw itself may be
visible. The only frame modification permitted is reinforce.
ment of the spring seat trom underneath tosupponthe jack
nut. No coil-over shocks will be permitted. Chrysler models
equipped with transverse torsion bar suspension may be
converted to longitudinal torsion bar suspension of the type
titled in previous Chwsler models.
2. Shock absorbers and their mountings are tree provided
they do not pass through the floor of the drivers cornpanment.
3. Standard A-arms. radius rods and basic suspension m m POnentS must be retained but may bestrengthened. Suspension pick-up points may be reinforced and relocated. Bushing material is free.
4. Anti-sway bars, torque rods and similar axie-locating
devices extra to the basicsuspension may beadded or s u b
Stituted, and new or reinforced brackets for them may be
installed.
Axle locatlng dew ces may not pass through body panels
5 Rtd8 nelghl taken r l t h tne car race-ready, must be m a w
tamed eqbal y on rlght and len sides, and must be at feast 6 '
as measured at any point along the underside of the rocker
panel.The rear riding height may not bemorethan 1"higher
than the front riding height.
6. Heavy duty steel spindlesand hubs, and any wheel beatings
may be substituted tor the originals.
7. Wheels Ail four road wheels must be identical. Steel wheels
must be used on all 8-cylinder models. Cast, one-piece
alloy wheels may be used on 6-cylinder models.
Maximum dimensions of rims: 15 in. diameter, 10 in. width.
Track tolerance is permitted to provide tor tire clearance:
3 in, front. 5 in. rear.
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51
8 IMSA-approved rac ng tares u l t h max mLm section wldlh of
13 3411 fore-cyl nder modelsand11 in for6-cylinder models
must b e used. Measurement will be taken of new tire
mounted on standard rim, off the car, at 30 lb. pressure.
Recapped tires may be used only if approved by IMSA.
9. Any standard or readiiy-available brakes may be fitted front
and rear.
10. Dual master cyliners are required.
C. Electrical Svstem.
1 Batten/ may be replaced wlth another of votage, sue and
welgnt slmllar to tne arlglnal. and lnslelled n tne stanoard
localoon or in the 1,-nk
2. Any makeof lgnitioncoil,condenser,sparkplugs,fuses,wiring, relays, and regulators of orbinal type may be used.
3. Any distributor or electronic ignition system may be used.
4. Alternator must function as originally intended, but may be
replaced with another of different manufacture.
5. The Standard wiring harness may be modified or replaced.
D. Engine and Drive Train
IMSA controls engine eligibility tor each approved make and
model. All engines and engine components must derive from
those produced in volume and readily available through the
normal retail sales outlets of the parent manufacturer of the
model, and such components must bear the manufacturer's
part number.
1. Original and approved optional components of the engine
and drive train may be machined, but n o material or
mechanical extension may be added.
2. Crankshaft, pistons, rings, wrist pins and connecting rods
are free.
3. Camshans, cam followers, pushrods, rocker arms, valves,
valve springs, keepers and retainers are free. It is permitted
to use threaded or pinned rocker studs, rocker stud girdles,
and to O-ring the block for sealing the head gasket.
4. Induction systems for various makes and models will be
regulated by IMSA.
82yl. models shall "seastandard Holley 2 bbl. carburetor
model 2300. list 4412. 500 cfm ratino. No modifications
are permottea to tne denturns. oares, ooosterr or ounerf l ~ eAlterations
~
are perm tted in let slzos, I "rages. f oats
and float mechanisms Emlsslon controls and enoke
mechanisms may be modified or removed. A spacer not to
exceed one inch i n thickness may be used to adapt
carburetor to manifold.
6 cyl. models Carburetor(s) and manifold is free, except
that no ram-type air intakes may be used and no modifi-
-
-
-
52
cation of the coachwork tor induction of carburetor air
IS permottea No +>ellnlectlon system may be ~ E e d
For 8-cylinder models IMSA-approve0 intake manllola m ~ ~
be f ned Generally. IMSA w 1appro.esny proouctloninlake
manifold which is commercially available to any Competitor
and listed in its manufacturer's catalog. No box-typeor tunnel-ram manifolds will be approved.
6. Fore-cylinder models a round air cleaner with a diameterof
at least 12" and no more than 16'W must be fitted directly
on the approved carburetor. A standard paper-type airfilter
element with a minimum thickness of 1" and a minimum
he gnt of 2 mLsl De used A1 alr to the carburetor must De
f ltered througn this e ement TOPof the a r c eaner mLst oe
solid. and no heat shield or ducts are permitted.
Exhaust System is free. Exhaust pipe must extend rearward
beyond driverand totheouteredgeof car. Emissiondevices
may be removed and any resulting holes plugged. IMSAmay
regulate exhaust systems.
. Oil sump and oil pi'ckup may be modified to increase oil
capacity and to prevent surge, and dry sump system may be
installed. Oil tanks may be mounted securely to the roll
cage in the rear of the passenger compartment.
Vents, breathers, oil filters and oil coolers for the engine.
transmission and differential may be added or substituted,
provided they are mounted within the confines of the body
but Outside the driver's compartment. Air may be fed to
these oil coolers through ducting which is not visibleexter"ally. Catch tanks are required to contain any fluids which
may leak out on to the race track.
10. A radiator of any sire which will fitthestandard location may
be installed and reshrouded if it does not alter the car's
appearance. Fan blades may be removed.
Fuel pumps are free in type, size and number. The use of a
fuel pressure regulator is permitted. Fuel pumps must be
located outside the driver compartment.
,L. Clutch is free.
13. Flywheel is free.
14. Any gearbox of up to4forwardspeedsandavailablethrough
the normal retail sales outlets of tho parent manufacturer
mav be used.
15 Dr ve matt and ~n versa1 loants are free
16 Rear axle is tree 021speclfteo track tolerance m.st oemalntained.
The following components may be added or replaced with
others of any origin:
Nuts, bolts, screws. washers and other such fasteners, ineluding safety wiring
-
53
- e l e c t r i ~wiring
~l
- gaskets and seals
- bearings and bushings
- drive belts
- pulleys
E. Identification
1. Every car must c a w standard identification plates, medallions and other ornaments.
2. Every car must carry on both right and left rear quarter
Panels the makeand model in leners of at least4" high, legible and in contrastina" colors.
3. Drivers name may be leftend above or beiow drivers window. Maximum height: 3".
4. Car numbers shall becarried on thedoors in black numbers
81 least 1 6 high and on the hood. Numbers'should conrrast
with body color. and be of legible proportions. No metallic,
mirror-finish or "engine turned numbers will be allowed.
5. All manufacturers decals, emblems, etc.. must be affixed to
the sides of the front fenders and not on the doors or rear
quarter panels. Advenising on can is subject to I M S m
approval.
11.6.7
Approved Makes and Models
(2-door. 4door and hatchbacks. unless otherwise noted)
MAKE
AMC
Hornet
AMX up 10 7 8
Concord
Matador Coupe
AMC Spirit
AMX 7 9
BUlCK
Skylark
Regal Coupe
Century Coupe
Skyhawk
CHEVROLET
Nova
Chevelle Coupe
Camaro '76t
Citation
Malibu '78t
Manza
Monte Carlo 7%+
APPROVED ENGINES
232.
232.
232.
232,
232.
232.
258. 304. 360
304
231.
231.
231.
231,
231 Turbo', 260, 267, 301, 350
231 Turbo'. 260. 267. 301. 350
231 Turbo', 260. 267. 301. 350
260. 267. 305
258.
258.
258,
256.
304. 360
304. 360
304, 360
304
229, 231. 260. 267. 305.
229. 231. 260. 267. 305.
229. 231. 260. 267. 305
2.8 V-6
229. 231. 260. 267. 205.
229, 231. 260. 267, 305
229. 231. 260. 267. 305.
54
350
350
350
DODGE
Aspn
Demon Duster
Mimda
225. 318, 340. 355 (340 with optional crank)
225, 318, 340. 355
225, 318. 340. 355
FORD
Granada
Fairmont
Maverick
Mustang 79+
171.
171,
171.
200,
250.
250.
250.
255.
255.
255.
255.
302.
LINCOLN MERCURY
Monarch
Zephyr
Comet
Capri
-1.
171.
171.
200,
250.
250.
250,
255.
302. 351. 351 Cleveland
302. 351. 351 Cleveland
302. 351. 351 Cleveland
302.
OLDSMOBILE
Omega
CUII~SS
coupe
Startire
PLYMOUTH
Volare
302, 351. 351 Cleveland
302. 351. 351 Cleveland
302. 351. 351 Cleveland
351. 351 Cleveland
225. 318. 340. 355
(340 M t h optional crank)
PONTIAC
Ventura
Phoenix
Grand Am 78+
Grand Prix '78r
Le Mans '78+
Sunbird
Firebird '76+
Rated as 350 cu. in. Limited to standard production induction
System and manifold.
It is Permined to utilize approved alternate heavy-duly cylinder
heads of standard design offered by the engine manufacturer
through his normal sales outlets and bearing the manufacturer's
part number. By standard design is meant the same number and
location of valves, ports and spark plugs as the original.
Optional cylinder head for the Oidsmobile 350 cu. in. engine.
part no. 22501232, is approved for use.
OfflClal welpm
10 IbS. per cubic inch with a minimum of 2500 lbs.
350
Engine displacement must be lettered on hood and cars must weigh
accordingly.
55
12. STANDING SUPPLEMENTARY REGULATIONS
IMSA hasestablirhed these uniform Standing Supplementary Ranlllations under which events in its various series are held and its
champions are determined.
IMSA is the sole authority for the awarding of all IMSA series,
pionship points, the naming of IMSA series driver and manufa
champions and the distribution of any IMSA series point funds in the
manner set forth in these Standing Supplementary Regulations.
Notwithstanding that a particular IMSA series competition may be
listed on the FIA calendar or be part of an event counting towards an
FIA championship, IMSA reserves a l e authority to settle finally any
dispute which might arise during an IMSA series competition.
insofar as the dispute would awed any of the above-mentioneddeterminations, by naming a final court of appeal in accordance with Article
10 of the IMSA CODE.
121 Camel GT Series
The Camel GT Series i s an annual calendar of races which
determines driver and manufacturer champions. the distribution of
point funds and other awards.
12.1.1 Duratlm
Camel GT Series races will have a minimum scheduled duration of
75 miles. Races may be divided into heats.
12.1.2 Car Ellglbllily
IMSA GT Category caroas defined in Article1 1.4of thelMSACODE
and amendments thereto.
12.1.3 Drlver Champlons
Driver champions will be recognized in the combined GTXIAAGTI
GTP division, the GT division over 2.5 liters andtheGTdivision under
2.5 liters in the Camel GT Series. These championships wiil be
determined by the relative paint standings of drivem a t the closeofthe
season. counllng all races rLn
Champ onshop polnts wl beawaroeo in each Camel GT Serles race
10 the too ten flnlshers in eaCn 0 ria on on a 20-15-12-1086-4-3-2-1
basis. A driver may earn points only in theonedivision inwhich hiscar
i 6 ComDetina.
.
In aoont on, one champlonlhlp po nt will oe awarded to tnefaslest
q ~ a l o l ~in
e reacn dl*lsvan ineacnSerlesrace Tnefnstertq~allf
sr osdk
fined as the driver of (he car recording the fastest lap time during an
official qualifying session. Performances in heat races wiil have noelfeet an the awarding of these points.
Adriver may drive only one car duringarace.unlessSupplementary
Reg~lationsspecify otherwise. Driverlcar assignments must be
declared prior to the actual start of the race.
The Supplementary Regulations may also provide for full or partial
-
point awards in heat r a m .
In order for a driver to be eligible for points, h
the following requirements:
I. RACES OVER 225 MILES
As specified in the SR, or:
A. His car murt complete at leasl70n of the distance Completed
by the winning car in his division.
8. He murt drive at least one-third of the distance or time of the
race.
Ii. ALL OTHER RACES
AS Specified in the SR. o r
A. His car must complete at least 90% of the distancecompleted
by the winning ear in his division.
0. He must drive at least one-half of the distance or time of the
race. Should two drivers each complete exactly one-half the
number of laps of the race, only the starting driver will be
swarded points.
Distance is normally measured in lapswithcreditforthe lapgoing to
thedriver who crosses the scoring lineinthecar: however, in racesofa
set time, IMSA may determine distance by length of time in the car
during the race.
IMSA's decision concerning any question or dispute about point
awards will be final.
In case of a tie in the final point standings, the tie shall be resolved
according to the record of first place finishes: then, if necessary, the
number of second place finishes, and so on down to tenth place
finishes. If a tie still remains, the tie shall stand and awards will be
shared equally.
12.1.4 Manufacturer Champlons
IMSA wiil recognize Camel GT manufacturer champions in each of
three divisions:
GT Under 2.5 Liters
GT Over 2.5 Liters
Combined Experimental GT (GTX). All-American GTQ (AAGT),
and GT Prototype (GTP)
Manufacturer points will be awarded on a 20-15-12-10-864-3-2-1
basis in each division. A given make will receive points for its highest
finishing position only in each Series race. In case of a tie in the final
point standings, it will be resolved i? the manner outlined in Article
12.13 above.
12.1.5 Camel GT Polnl Fund
A point fund of $125,OW has been posted by the R. J. Reynolds
Tobacco Company and will be paid out to the top ten drivers in each
division at the completion of the 1983 Camel GTschedule, asfollows:
-
GT Division Combined GTX, GTP, AAGT
-
$75,000:
4. $5.WO;
5. $4,500:
1. $25,000;
2. $15,000;
3. S10.OW:
9.$2,500;
10.$2.250
7.$3.500;
8.S3.250;
6.34.000;
GTO and GTU Divisions - 8 2 5 . m each:
2. $5,000:
3. S2.5W:
4. $1.875;
5. $1,250;
I.SlO.Oo0:
10. $ 625
8. $ 675:
9. $ 750;
6. $ 1.125:
7. $I.OW:
12.
.1.8 Aduertlslna
To be elngoole lor polnl awards. competitors are reqL re0 lo orsplay
the off cra CAMEL GT Serles decal Lnaltereo n a slandara ocat on
on each s de of lhelr cars and me ofllclal CAMEL GT Serler pdtcn an
the breast area of their driving uniforms. A clear space measuring 20
inches by 24 inches must be reserved forthe official Camel GTSeries
decal, the IMSA GTdecal andthecarnumber, asshown inthediagram
on page63,Thisrpaceshould beonthedoorsunlasstheconfiguration
of the car is such that the number and decals will be more legible in
another Dlace.
All advertls ng fs s.bect to IMSA approval Advcrtosing of any
tobacco prod-ct otner tnan Came s sna I not erceea 32square Inches
per side of the vehicle.
Drivers are also required to sign the standard release on theirentry
farms permitting the Series sponsor to use their names and pictures
and phetos of their racing cars for Series advertising and promotion
purposes.
-
12.2 CHAMPION SPARK PLUG CHALLENGE SERIES
TneChamp anspark Plug ChallengeSerles sacalendarof racesfor
cars using IMSA approved radial street tires.
This series determines a Driver Champion, a Manufacturer Champion, and the distribution of the Series Point Fund.
12.2.1 Duntlon
Champion S p a h Plug Challenge Series races will vary in duration.
Races may be rcheduled in heats.
1222 Car Eltglbtllly
Per paragraph 11.5 of the iMSA Code and amendments thereto.
12.2.3 Ddnr Champlon
IMSA Will recognizeadriver champion intheSeries.Thischampianlhip will be based on the relative pointstandingsotcompetitorsatthe
;lose of the Series.
Championship points will be awarded in eachseries racetothetop
len finishers on a 20-15-12-10-8-6-43-2-1 basis.
In addition, one championship point will be awarded tothe fasten
qualifier in each Series race. The fastest qualifier is defined as the
driver of the car recording the fastest lap time during an official
qualitying session. Performances in heat races will have no effect on
the awardino of these oaints.
Aorlrer may dr ve only onecar dur~ngaraea.uniersS~pplementary
Regulat~onsspeclly olherw~se Drnver/car sssognments mast oe
declared prior to the actual start of the race.
The Supplementaty Regulations may also provide for full or partial
point awards in heat race
In order for a driver to I
for points, he must meet the following requirements:
I. RACES OVER 225 M
As Specified in the SI
A. His CBT must complete at lea:st 70% 01 the distance completed
by the winning car.
0. He must drive r 11least o n e t tiird of the distance or timeof the
race.
II. ALL OTHER RACES
AS specified in the SR, or:
A. His car must complete at least 90% of the distancecompleted
by the winning car.
0. He must drive at least one-half of the distance or time of the
race. Should two drivers each complete exactly onehall the
number of laps of the race, only the starting driver will be
awarded points.
Distance is normally measured i n l a w with creditforthe lapgoing to
the driverwho crossesthe scoring lineinthecar; however, in racesofa
set time, IMSA may determine distance by length of time in the car
during the race.
1MSA.s decision concerning any question or dispute about point
awards will be final.
In case of atie in the final Point standings, the tie ahall be resolved
according to the record of lim place finishes: then, If necessary, the
number of second place finishes, and so on down to tenth place
linishes. If a tie still remains, the tie shall stand and awards will be
shared equally.
.-
12.24 Manutadurer Charnplon
IMSA will recognize a manufacturer champion in the Series. This
championship will be based on the reiativepointstandingsofmakesat
the close of the Seriee~
-~ - . ~
Championship points will be awarded ona20-15-12-10-8643-2-1
basis in each race. A given make will receive points for its highest
finishing position only in each Series race.
In Caseofatie in thsflnal pointstandings,thetieshatlbennolvedas
Outlined in Paragraph 12.2.3.
~
~
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~
12.25 Polnt Fund
The Champion Spark Plug Challenge Series driver point fund of
S40.W will be distributed atthecloseoftheseason bythechampion
Spark Plug Co. to thetopfineendrivers inthefinal paintstandings, as
foliows:
-
I $lO,OW 6 - $2,000
2
6.0W 7 - 1.800
3
4,OW 8 1.7W
4 - 3.000 9 - 1,600
5 - 2.400 t 0 - 1.500
-
-
11 $1.400
12 1.300
13 1,200
1 4 - 1,100
1 5 - 1.000
12.2.6 Advertising
TO be eligible for prize money and point awards, competitors are
required to display official Champion Spark Plug Challenge Series
decals on their car doors in prescribed locations, official Series
windshield tint on thewindshield, and official Series patch on thechest
of their driver unlformr. No other advertising may be carried on the
doors.
If an official tire should be prescribed for the Series. theofficial tire
decal shall be canied in a standard location above the rear wheel
openings and on the front bumper or spoiler.
All advertising issubjectto iMSA approval. Advertising of any brand
of spark plug other than Champion shall not exceed 32 square inches
per side of the vehicle.
Drivers are also required to sign the usual releaseon their entry form
permitting IMSA and event or Series sponsors to usetheir namesand
pictures and photos of their racing cars for advertising and promotion
purposes.
12.3 Kelly A m n i u n Challenge S r l n
The Kelly American Challenge Series is a calendar of races for
volume-produced American sedans recognized and prepared
according to Article 11.6. The Series determines a championship tor
driven and manufacturers and other awards, and recognizes the top
women drivers in the Series.
12.3.1 Duntlon
Kelly American Challenge Series races may vary in duration. Races
may be scheduled in heats.
12.32 Car Eliplblllly
Per Article 11.6 of the IMSA CODE and amendments thereto.
12.3.3 D r t n r Champion
IMSA will recognize a driver champion and the highert-placed
woman driver in the Series, based on the relative point standings of
competitors after the final Series race annually.
Championship points will be awarded ineachseries racetothetop
ten finishers on a 20-15-12-1044-44-2-1 basis. in addition, one
championship point will be awarded to the driver of thecar recording
the fastest lap time during an official qualifying session.
A driver may drive only one car during a Series race unless the
Supplementary Regulations provide otherwise. Driverlcar assignM)
ments must be declared prior to the actual start. The Supplementary
Regulations may also provide for full or partial point awards in heat
races.
TO be eligible for points, these requirements must be met:
1) Races 225 miles or longer:
As specified in the Supplementary Regdations. or:
a) Driver must complete at least 70% of the distance (in whole
laps) covered Iby the winnet', and
b) Driver must d rive
~ at least one-third the di! nance or time of the
race.
2) Races less than 225 miles:
As specifid in thr ~upp~~rssur~nary
n.rurrrn#ons, or:
a) Driver must complete at least% of the distancecovered by
the
winner and
~.
b) Driver must drive st least onbhalf the distance or time of the
race. In case both drivers complete exactly one-half the
number of laps, only the starting driverwill be awarded points
in this case.
IMSA reserves final authority to senleany question or dispute about
point awards.
In care of a tie in the final Series point standings, the tie shall be
resolved according l o the relative numberoffirstplaiefinishes:then, if
necessary. the number of second place finishes, ete.. down to tenth
place finishes. If a tie still remains, it shall stand and awards wiil be
shared equally.
--A-
12.3.4 Manufacturer Champion
IMSA wiil recognizes manufacturerchampion intheKelly American
ChallengeSsries, based on the relativepaintstandingsof makesatthe
close ofihe Sene*. Points will beawarded ana20-15112-10-8-M-3-21 basisineach race.Agivenmakewil1 receivepointsonly foritshighest
finishing position in each race. Ties will be resolved per Art. 12.33,
12.3.5 Paint Fund
The Kelly American Challenge Series Point Fund of $60,000 will be
distributed at the close of thesearon by theseriessponror as follows:
Cnampion S12,OW
6
$3.OW
I1
$1.400
28.5W
7
2,5W
12
1,200
1,tW
3
5.500
8
2,OW
13
-
-
-
-
B o n u m for Women D r h s n $10.000
Champion $5,OW
2
3,000
3
2,OW
-
~ ~ ~ . .
TO be eligible for prize money and point awards, competitors are
required to display official Kelly American Challenge Series decals
On their car doors in prescribed locations, official Series windshield
tint on the windshield and official Series patch on the chest oftheir
driver uniforms. No other advertising may be carried on the doors.
All advertising is subject to IMSA approval.
Drivers are also required to sign the usual release on entry farms
permitting IMSA and sponsorsof events and series10 use their names
and photos for advertising and promotion purposes.
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~
~
~~~
KELLY AMERICAN CHALLENGE
CUAMPION SPARK PLUG CHILLENCE
13. APPENDIX
EOUIVUENCE FORYUIAS
1 inch = 2.54 cm. = 25.4 mm.
1 cubic inch = 16.387 cubic cm.
1 millimeter = ,03937 inch
1 meter = 1.0836 yards
1 kilomeler = l W O melem = ,82137 mile = 1083.6 yards
1 mile = 1.760 yards = 1.60834 kilometem
Miles per hour = kilomemm-per-hour times ,82137
Kilometem per hour = miles per hour tinma 1.608M
Icubic centimeter = ,061 CUMCinch
1 liter = 61.03 cubic inches = 1WO oubc oentimeten (00.)
1 kilogram = 2.21 pounds
1 pound = 453.6 grams
1 hundred-weight (cwt.) = 112 pounds (British). 1M) Ibs. (
Note: I f a British car is said to weigh 25 M..ils weight*
times 112 or 28M) Ibs.
1 U.S. gallon = 231.18 cu. in. = 3.785 liten
6 U.S. gallons = 5 imperial (British) gallons
1 mile per hour = 1.467 feet per m o n d
Cylinder volume (displacement) = 3.1416 x bore x barex
4
Engine displacement = Cylinder volume times number of
Weight of gasoline = 6.2 lbs./galion