Untitled 2 - Greater East Imports

!
Nissan RB26DET Engine
!
What does it mean?
!
“RB” -denotes engine code.
“ D” -denotes a double overhead camshaft, as opposed to a single overhead
camshaft
“E”
-denotes electronic fuel-injection
“S”
-denotes the engine is fitted with carburettors
“T”
-denotes the engine is fitted with a turbocharger as standard
“TT” -denotes the engine is fitted with twin turbochargers as standard
!
!
Overview.
!
Primarily fitted to the Nissan Skyline GTR (R32-R34). In standard form, which is
indicated by the numbers 05U, this engine is virtually indestructible, and is a favourite
among street racers the world over because of its proven reliability. In standard form,
the RB26DET engine has achieved an iconic, if not legendary, status as being reliable
and very responsive due to its “under square” configuration. The relatively short stroke
not only makes it possible to maintain high rpm’s, it also makes it extraordinarily
responsive to throttle inputs.
!
However, while the basic design features of this engine allow for almost
unlimited tuning, a feature that makes it a highly sought after power plant for drifting
and track racing, this engine is subject to severe, and often fatal lubrication issues for
which there is no cheap remedy, and the required conversion to a dry-sump system can
run to several thousand dollars. In addition, the standard turbocharger has ceramic
turbines, which are known to fail even when moderate modifications that affect
temperature and RPM are made.
!
Due to the popularity of this engine for purposes of competition, they are
relatively rare, and difficult to find in standard, RB26DET form, since the conversion to
twin turbos is relatively easy; albeit expensive due to the required modifications to the
lubrication system, as well as the valve train, fuel delivery system, and other internals to
achieve its full potential as a competitive racing engine.
!
However, despite the potential lubrication issues, this engine has seen extensive
application in competition; and examples that produce 1400hp with standard internals
are common. However, despite its many sterling qualities, the high all-up weight of this
engine can severely influence vehicle dynamics and handling, although it has achieved
notable successes in the FIA Group A and Group N touring car championships.
!
Basic Engine Specs.
Engine Code: RB26DET
!
-
!
!
Six Cylinder Inline.
Cast iron block.
Aluminum cylinder head.
Double Overhead Camshafts.
Displacement/ Capacity: 2598 cc.
Bore: 86.0 mm
Stroke: 73.7
Compression ratio: 8.5 : 1
Compression pressure: 170psi@300rpm.
Weight: 600 pounds.
Horsepower: Max. Power (kW) 206 @6,800 rpm
Torque: Max. Torque (N-m) 392 @4,400
!
Toyota 2JZ Engine
!
Overview.
!
First introduced in 1991, and fitted to the Toyota Aristo, (some sources claim
however that it was first fitted to the Lexus SC 300 in some markets) the original 3.0 L
(2997 cc) 2JZ inline six-cylinder engine was “square” with equal bore and stroke of 86
mm. Variable valve timing, or VVT-i, was only introduced on this engine in 1997, for
release in 1998. Since then, the 2JZ engine has seen extensive modification and
development: so much so, in fact that the original 2JZ is hardly recognized today, and
has largely disappeared from the motoring world, and in particular the competitive,
racing world.
!
2JZ-GE.
!
The first derivative of the original 2JZ, this engine was developed in direct
response to the highly successful Nissan RB26DET. This engine employs Sequential
Electronic Fuel Injection and a Direct Ignition System, and is arguably the most popular
and widely used engine in all disciplines of modern motor sport, as well as a popular
choice in engine replacements and conversions on almost anything with wheels.
!
While there are no known reliability issues with this engine in standard form
provided it is serviced and maintained properly, the addition of turbochargers require
head gasket replacement, as well as the installation of oil squirters to assist with
cooling of the pistons. DIY turbo installation on this engine is not recommended due to
the large number of variables involved, such as current mileage, specifics of the various
turbo kits available, and the skill of the installer/performance shop.
!
However, with the installation of suitable internals, the 2JZ-GE engine is capable
of developing in excess of 1000 hp, albeit at the expense of reliability.
!
Basic Engine Specs:
!
- Six Cylinder Inline
- Cast iron block.
-
!
Aluminum cylinder head.
Belt-driven DOHC with WT-i
Displacement: 2,997cc.
Bore: 86.0 mm.
Stroke: 86.0 mm.
Compression ratio: 10.5:1.
Fuel system: SFI (Sequential Fuel Injection.)
Horsepower: 215 to 230 hp (158 -169 kW) @ 5800rpm – 6000rpm
Torque: 209 to 220 ft lbs of torque (283 to 298 Nm) @3800rpm - 4800 rpm.
!
2JZ-GTE.
This further development of the original 2JZ engine is the perfect combination
of power and reliability. Produced from 1994-1998, the 2JZ-GTE was used in the Supra
Mk IV chassis, and is even today the engine of choice for street racing, drifting, and
most other motor sport disciplines due to its well deserved reputation for reliability
under extreme racing conditions.
!
Employing two turbos in conjunction with a Direct Ignition System, the 2JZ-GTE
engine is one of the most powerful and responsive engines in the 3 litre class, even
outperforming some newer, and more expensive engines available in Italian and
German supercars, with the added advantage that there are no known reliability issues.
!
For the export model exported to America, Toyota upgraded the engine with
smaller, steel- wheeled turbochargers, higher capacity fuel injectors, etc, to increase
the power output to 320 hp (239 kW) @ 5600 rpm. Because of the sequential
arrangement of the turbos, this engine develops as much as 300 lb/ft (410 N/m) of
torque from as low as 1800 rpm, which makes it ultra-responsive at higher rpm’s, since
turbo lag is largely eliminated at rpm’s above 2000.
!
Basic Engine Specs:
- Type: Inline six cylinders.
- Aluminum cylinder head.
- 24 valves, belt driven DOHC
- Twin, sequential turbos
- Compression ratio: 8.5 :1
-
!
Bore: 86.0 mm
Stroke: 86.0 mm
Displacement: 2999 cc.
Injectors: (Standard) 440cc /pm
Weight: 600 pounds.
Speed cutout: 180km/h in Japan, but 250km/h for other markets.
RPM limited to 7200.
Horse power: 209 KW(280 hp)@ 5600 rpm
Torque: 460 Nm (338ft/lb) @ 3600 rpm
!
Conclusion
In standard form, for street use, or even casual street racing, there is very little
that makes either of these engines “better” that the other. Both engines have no any
known reliability issues; and the power output of even the legendary 2JZ-GTE Toyota
engine is easily matched, and even surpassed by relatively minor modifications to the
engine and fuel management systems of the RB26DET Nissan engine- without
substituting any internals.
!
However, in competition form, the RB26DET Nissan engine is at a distinct
disadvantage because of the high cost of conversion to correct, or resolve known
lubrication issues. On the other hand, the 2JZ-GTE Toyota developed this engine with
competition in mind, and it therefore requires no extensive modifications, or
rebuilding. Moreover, the availability of most of its maximum torque at below 2000
RPM makes it extremely responsive, since turbo lag is virtually eliminated at RPM’s
above 2000 due to the sequential arrangement of its turbos; which is a design feature
that has only recently been introduced by Porsche engine designers.
!
If competition were the only criterion used in comparing these two engines, the 2JZGTE Toyota-built engine is by far the better choice.
!