The
RB engine is a 2.0–3.0 L
straight-6The straight-six engine or inline-six engine is a six-cylinder internal combustion engine with all six cylinders mounted in a straight line along the crankcase...
four-strokeA four-stroke engine, also known as four-cycle, is an internal combustion engine in which the piston completes four separate strokes—intake, compression, power, and exhaust—during two separate revolutions of the engine's crankshaft, and one single thermodynamic cycle.There are two...
petrol/
gasolineGasoline , or petrol , is a toxic, translucent, petroleum-derived liquid that is primarily used as a fuel in internal combustion engines. It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives. Some gasolines also contain...
engineAn engine or motor is a machine designed to convert energy into useful mechanical motion. Heat engines, including internal combustion engines and external combustion engines burn a fuel to create heat which is then used to create motion...
from Nissan produced from 1980-2004. A special limited edition the LMRB26 was also built during this time by
General MotorsGeneral Motors Company , commonly known as GM, formerly incorporated as General Motors Corporation, is an American multinational automotive corporation headquartered in Detroit, Michigan and the world's second-largest automaker in 2010...
in
AustraliaAustralia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...
.
Both SOHC and DOHC versions have an aluminium head. The SOHC versions have 2 valves per cylinder and the DOHC versions have 4 valves per cylinder; all cam lobes move only one valve. All RB engines have belt-driven cams and a cast iron block. Most turbo models have an intercooled turbo (the exceptions being the single cam RB20ET & RB30ET engines), and most have a recirculating factory blow off valve (the exceptions being when fitted to
LaurelsIn April 1968 Nissan presented its new Laurel in four-door deLuxe and Super deLuxe versions, both equipped with a 1.8 L inline-four cylinder engine and independent rear suspension. In summer 1970 a hardtop coupé joined the line-up, one year later a 2000 cc engine became available...
and
CefirosThe Nissan Cefiro is a intermediate-size automobile range sold in Japan and other countries. The 1989 model was introduced initially as a 4-door sedan, however a wagon was later produced. A large proportion were equipped with automatic transmissions....
) to reduce boost surge when the throttle is closed.
The Nissan RB Engine is derived from the six cylinder Nissan
L20AThe Nissan L series of automobile engines ranged from 1.3 L to 2.8 L in both straight-4 and straight-6 configurations and were produced from 1967 through 1986. This was the engine of the Datsun 240Z sports car as well as the Datsun 510 and the first Nissan Maxima. These engines are known for their...
engine which has the same bore and stroke as the RB20.
Bore and stroke
All Nissan engines follow a naming convention, identifying the engine family (in this case,
RB), displacement, and features present- see the
list of Nissan engines for detail.
The stock dimensions for the RB engines;
- RB20 - 2.0 L (1998 cc, bore: 78.0 mm, stroke: 69.7 mm)
- RB24 - 2.4 L (2428 cc, bore: 86.0 mm, stroke: 69.7 mm)
- RB25 - 2.5 L (2498 cc, bore: 86.0 mm, stroke: 71.7 mm)
- RB26 - 2.6 L (2568 cc, bore: 86.0 mm, stroke: 73.7 mm)
- RB30 - 3.0 L (2962 cc, bore: 86.0 mm, stroke: 85.0 mm)
- "D" indicates a dual overhead cam as opposed to a single overhead cam
- "E" indicates the engine is electronically fuel-injected
Fuel injection is a system for admitting fuel into an internal combustion engine. It has become the primary fuel delivery system used in automotive petrol engines, having almost completely replaced carburetors in the late 1980s....
- "S" indicates the engine is carburetted
- "T" indicates the engine has a factory installed turbocharger
- "TT" indicates the engine has factory installed twin turbochargers
RB20
There were a variety of 2.0 L
RB20 engines produced:
- RB20E - single-cam (96 to 110 kW (130 to 145 ps) @ 5600 rpm, 167 to 181 N·m
A newton metre is a unit of torque in the SI system. The symbolic form is N m or N·m, and sometimes hyphenated newton-metre...
(17 to 18,5 kgf·m) @ 4400 rpm)
- RB20ET - single-cam turbocharged (125 kW (170 PS) @ 6000 rpm, 206 N·m (21.0 kgf·m) @ 3200 rpm)
- RB20DE - twin-cam (110 to 114 kW (150 to 155 PS) @ 6400 rpm, 181 to 186 N·m (18.5 to 19 kgf·m) @ 5600
- RB20DET - twin-cam turbocharged (158 kW (215 PS) @ 6400 264 N·m (27.0 kgf·m) @ 3200 rpm)
- RB20P - single-cam (94 PS @5600 rpm and 142 N·m @2400 rpm)
- RB20DET-R - twin-cam turbocharged (210 ps @6400 rpm and 245 N·m @4800 rpm
- NEO RB20DE - twin-cam 155 PS, improved low end torque, reduced fuel consumption and emissions.
The first
RB20E/ET/DE/DET engines were fitted to the
HR31 SkylineThe first Skyline was introduced in April 1957, by the Prince Motor Company, and was marketed as a luxury car. It featured a 1.5 L GA-30 engine producing 44 kW @ 4400 rpm. It used a de Dion tube rear suspension and was capable of 140 km/h . The car weighed around 1300 kg...
. The early twin cam engines are generally referred to as 'Red Top' engines because they have red cam covers. The early twin cam engines featured the
NICS (Nissan Induction Control System) injection system, while the later twin cam engines used
ECCS (Electronically Controlled Combustion System). Later versions which used
ECCS engine management, discarded the twelve tiny runners for six much larger ones (though they retained twelve ports on the head, so there was a splitter plate). The RB20E was also fitted to some
Holden CommodoreThe Holden Commodore is an automobile manufactured since 1978 by the Holden subsidiary of General Motors in Australia, and, formerly, in New Zealand. In the mid-1970s, Holden established proposals to replace the long-serving Kingswood nameplate with a smaller, Opel-based model...
s (the VL Commodore) sold in New Zealand, and also to the A31 Cefiro and C33 Laurel. The Z31 200ZR was fitted with an intercooled NICS type RB20DET.
RB20DET Red top Camshaft duration 248°in, 240°ex lift: 7.8mm in, 7.8mm ex
LaurelsIn April 1968 Nissan presented its new Laurel in four-door deLuxe and Super deLuxe versions, both equipped with a 1.8 L inline-four cylinder engine and independent rear suspension. In summer 1970 a hardtop coupé joined the line-up, one year later a 2000 cc engine became available...
,
R32 SkylineThe first Skyline was introduced in April 1957, by the Prince Motor Company, and was marketed as a luxury car. It featured a 1.5 L GA-30 engine producing 44 kW @ 4400 rpm. It used a de Dion tube rear suspension and was capable of 140 km/h . The car weighed around 1300 kg...
and
CefirosThe Nissan Cefiro is a intermediate-size automobile range sold in Japan and other countries. The 1989 model was introduced initially as a 4-door sedan, however a wagon was later produced. A large proportion were equipped with automatic transmissions....
used the second (1989-1993) series RB20E/DE/DET. This had an improved head design, and used the
ECCS injection system. These later motors are known as 'Silver Top' engines.
RB20DE Camshaft duration 232° in, 240° ex lift: 7.3mm in, 7.8mm ex
RB20DET Camshaft duration 240°in, 240°ex lift: 7.3mm in, 7.8mm ex
The RB20DET-R was used in the
Nissan SkylineThe first Skyline was introduced in April 1957, by the Prince Motor Company, and was marketed as a luxury car. It featured a 1.5 L GA-30 engine producing 44 kW @ 4400 rpm. It used a de Dion tube rear suspension and was capable of 140 km/h . The car weighed around 1300 kg...
2000GTS-R (HR31). It is limited to 800 units.
The RB20P is the
autogasAutogas is the common name for liquefied petroleum gas when it is used as a fuel in internal combustion engines in vehicles as well as in stationary applications such as generators. It is a mixture of propane and butane....
LPG (Liquefied petroleum gas) version of the RB20, but with 12 valves (OHC).
RB24S
This is a very rare engine, as it was not produced for the Japanese domestic market. These were fitted to some left hand drive Nissan Cefiros exported from Japan new. Mechanically, the RB24S combines an
RB30E head,
RB25DE/DET block and
RB20DE/DET crank with 34 mm height pistons. The resulting 86.0 mm bore and 69.7 mm stroke combined to form a 2,428 cc inline-six engine.
This engine used carburettors instead of the Nissan ECCS fuel injection system. It is able to rev harder than the
RB25DE/DET (as it has the same stroke as the
RB20DE/DET) as well as being almost the same displacement as the
RB25DE/DET. A common modification is to fit a twin cam head from other RB series motors while retaining the carburettor set-up. The standard single cam form produced 141 PS at 5,000 rpm and 20.1 kgf·m (197 N·m) of
torqueTorque, moment or moment of force , is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist....
at 3,000 rpm.
RB25
The 2.5 L
RB25 engine was produced in four forms:
- RB25DE - NON-TURBO twin-cam 140 kW/190 PS (180 - 200hp ) @ 6000 rpm, 255 N·m (26.0 kgf·m) @ 4000 rpm)
- RB25DET - twin-cam TURBO (T3 Turbo) (245 to 250 hp and 319 N·m)
- NEO RB25DE- NON-TURBO twin-cam 147 kW/200 PS @ 6000 rpm, 255 N·m (26.0 kgf·m) @ 4000 rpm)
- NEO RB25DET - twin-cam TURBO (206 kW (280 PS) @ 6400 rpm, 362 N·m (37.0 kgf·m) @ 3200 rpm)
RB25DE and DET engines produced from August 1993 also featured
NVCSNissan Variable Cam Timing is an automobile variable valve timing technology developed by Nissan. N-VCT was first introduced in 1987 on the VG30DE and VG20DET engine. N-VCT varies the timing of the valves by rotating the cam shaft; valve lift and duration are NOT altered...
(Nissan Variable Cam System) for the intake cam. This gave the new RB25DE more power and torque at lower rpm than the previous model. From 1995, both the RB25DE and RB25DET had a revised electrical system and the turbo charger on the RB25DET had a plastic compressor wheel rather than aluminium. Generally these engines are referred to as Series 2 engines. The most obvious change to the system was the introduction of ignition coils with built in ignitors, therefore the coil ignitor that was on previous models was not used. Other changes were, different air flow meter, engine ecu, cam angle sensor and throttle position sensor. Mechanically series 1 and series 2 are exactly the same.
In May 1998 a NEO head was fitted, which enabled the engine to be classified as a low emission vehicle (
LEVA low-emission vehicle is a motor vehicle that emits relatively low levels of motor vehicle emissions. The term may be used in a general sense, but in some countries it is defined in air quality statues....
) engine due to their lower fuel consumption and emission output. The NEO head featured solid lifters rather than hydraulic, revised camshafts and a revised inlet manifold, in particular the RB25DE NEO which had 2 inlets going into the inlet manifold. The combustion chamber of the head is smaller, so GT-R spec connecting rods are used to compensate. The turbo received the larger OP6 turbine.
The non-VCT, non-turbo RB25DE was fitted to the R32 Skyline, the VCT turbo and non-turbo was fitted to R33 Skylines and the
WC34 StageaThe Nissan Stagea commonly referred to as the Skyline wagon when the 2.5 turbo is fitted, is a station wagon originally produced by Nissan in 1996 as direct competition for the Subaru Legacy Touring wagon in the Japanese Domestic Market.There are 3 different versions of the Stagea, WC34 Series 1 ,...
. Early R34 Skylines use the non NEO RB, later models use the NEO version.
R32 Skyline RB25DE Camshaft duration 240°in, 232°ex lift: 7.8mm in, 7.3mm ex
R33 Skyline RB25DE Camshaft duration 240°in, 240°ex lift: 7.8mm in, 7.8mm ex
RB25DET Camshaft duration 240°in, 240°ex lift: 7.8mm in, 7.8mm ex
RB25DE NEO Camshaft duration 236°in, 232°ex lift: 8.4mm in, 6.9mm ex
RB25DET NEO Camshaft duration 236°in, 232°ex lift: 8.4mm in, 8.7mm ex
RB26DETT
The RB26DETT engine is a 2.6L Inline-6 engine manufactured by Nissan, for use primarily in the 1989-2002 Nissan Skyline GT-R. The RB26DETT engine block is made from cast iron, and the cylinder head is made from aluminium. The cylinder head contains 24 valves (4 valves per cylinder), and uses a dual overhead camshaft setup. The intake of the RB26DETT varies from other RB-series motors in that it has six individual throttle bodies instead of a single throttle body. The engine also uses a parallel twin-turbo system. The turbo system is arranged so that the front turbo is powered by the front 3 cylinders, and the rear turbo is powered by the rear 3 cylinders. The RB26DETT uses a pair of T28-type ceramic turbochargers that are set by the wastegates to limit boost pressure to 10 psi, although the Skyline GT-R has a built in boost restrictor to keep boost under 14 psi.
The first 2.6 L RB26DETT featured twin-turbochargers and produced around 280 HP (206 kW) @ 6800 rpm and 260 ft•lb (353 N•m) @ 4400 rpm. The last series of the RB26DETT produced 280 PS (206 kW) @ 6800 rpm and 289 ft•lb (392 N•m) @ 4400 rpm. } The reason for this discrepancy is a gentlemen's agreement between Japanese automakers to limit the
advertised horsepower of any vehicle to 280 PS (276HP). It is widely known for its strength and extreme power potential. It is not uncommon for 600 hp to be achieved without modification of the engine internals. With regular maintenance, many of these engines have been driven well beyond the 100,000 mile mark with a few heading toward 200,000 miles. With extreme modification, the RB26 motor is capable of power in excess of 1 megawatt (or over 1,340 hp). (*Note: The KA24DE has been proven to make in excess of 1100whp with "extreme modification")
RB26DETT Camshaft duration 240°in, 236°ex lift: 8.58mm in, 8.28mm ex
RB26DETT N1 Camshaft duration 240°in, 236°ex lift: 8.58mm in, 8.28mm ex
There is a common oiling problem with the pre-1992 R32 RB26 motors, as the surface where the crankshaft meets the oil pump was machined too small, eventually leading to oil pump failure at high rpm. This issue was resolved in later versions of the RB26. Aftermarket performance parts makers also make oil pump extension drives to rectify this problem.
Originally the R32
GT-RThe Nissan Skyline GT-R is a Japanese sports car based on the Nissan Skyline range.The first GT-Rs were produced from 1969–1973. After a 16 year hiatus since the KPGC110 in 1972, the GT-R name was revived in 1989 with the Skyline R32. This car was nicknamed "Godzilla" by the Australian motoring...
was planned to have a 2.4L RB24DETT, and compete in the 4000 cc class (in
Group AIn relation to motorsport governed by the FIA, Group A referred to a set of regulations providing production-derived vehicles for outright competition. In contrast to the short-lived Group B and Group C, the Group A referred to production-derived vehicles limited in terms of power, weight, allowed...
rules, the displacement is multiplied by 1.7 if the engine is turbocharged). This was when
NismoNismo is the motorsports and performance division of Nissan Motor Company. Formed in 1984 as a result of a merger of two motorsport departments, Nismo cars have participated in JSPC, Formula Nippon, JTCC, 24 Hours of Le Mans and 24 Hours of Daytona...
was going through the process of designing the R32 GT-R to be a
Group AIn relation to motorsport governed by the FIA, Group A referred to a set of regulations providing production-derived vehicles for outright competition. In contrast to the short-lived Group B and Group C, the Group A referred to production-derived vehicles limited in terms of power, weight, allowed...
race car. But when the engineers added the AWD system, it would make the car heavy and less competitive.
NismoNismo is the motorsports and performance division of Nissan Motor Company. Formed in 1984 as a result of a merger of two motorsport departments, Nismo cars have participated in JSPC, Formula Nippon, JTCC, 24 Hours of Le Mans and 24 Hours of Daytona...
made the decision to make the engine a 2.6L twin turbo, and compete in the 4500 cc class, resulting in the RB26DETT known today.
The RB26DETT was used in the following cars:
- Nissan Skyline GT-R
The Nissan Skyline GT-R is a Japanese sports car based on the Nissan Skyline range.The first GT-Rs were produced from 1969–1973. After a 16 year hiatus since the KPGC110 in 1972, the GT-R name was revived in 1989 with the Skyline R32. This car was nicknamed "Godzilla" by the Australian motoring...
BNR32
- Nissan Skyline GT-R
The Nissan Skyline GT-R is a Japanese sports car based on the Nissan Skyline range.The first GT-Rs were produced from 1969–1973. After a 16 year hiatus since the KPGC110 in 1972, the GT-R name was revived in 1989 with the Skyline R32. This car was nicknamed "Godzilla" by the Australian motoring...
BCNR33
- Nissan Skyline GT-R
The Nissan Skyline GT-R is a Japanese sports car based on the Nissan Skyline range.The first GT-Rs were produced from 1969–1973. After a 16 year hiatus since the KPGC110 in 1972, the GT-R name was revived in 1989 with the Skyline R32. This car was nicknamed "Godzilla" by the Australian motoring...
BNR34
- Nissan Stagea
The Nissan Stagea commonly referred to as the Skyline wagon when the 2.5 turbo is fitted, is a station wagon originally produced by Nissan in 1996 as direct competition for the Subaru Legacy Touring wagon in the Japanese Domestic Market.There are 3 different versions of the Stagea, WC34 Series 1 ,...
260RS WGNC34改
- Nissan Skyline GT-R
The Nissan Skyline GT-R is a Japanese sports car based on the Nissan Skyline range.The first GT-Rs were produced from 1969–1973. After a 16 year hiatus since the KPGC110 in 1972, the GT-R name was revived in 1989 with the Skyline R32. This car was nicknamed "Godzilla" by the Australian motoring...
BCNR33 AUTECH Var.
RB26DETT N1
The RB26DETT N1 is a modified version of the RB26DETT engine, developed by Nismo (Nissan Motorsports) for Group A and Group N motorsport. Nismo found that the standard RB26DETT engine required too much maintenance for use in a Group-A or Group-N race car and consequently designed the N1 block. This was first used in Bathurst Australia. Nismo balanced the crankshaft to a higher specification than stock, as the RB26DETT engine experiences vibrations between 7000 and 8000 rpm. The engine also received improved water and oil channels within the engine block. The pistons and top piston rings were also upgraded to 1.2 mm. The N1 engine also has upgraded camshafts and upgraded turbochargers.
Although all versions of the RB26DETT N1 engine use
GarrettGarrett AiResearch was a manufacturer of turboprop engines and turbochargers, and a pioneer in numerous aerospace technologies. It was previously known as Aircraft Tool and Supply Company, Garrett Supply Company, AiResearch Manufacturing Company, or simply AiResearch...
T25 turbochargers, the specification of the turbochargers changed through the 3 generations of the RB26DETT N1 engine (R32, R33, and R34). The R32, and R33 versions used Journal Bearing T25 Turbochargers. The R34 RB26DETT N1 engine used Garrett GT25 turbo chargers (which use a Ball Bearing).
The biggest difference between the turbochargers used in the N1 engine, and the standard RB26DETT engine, is that the Turbine Wheels in the turbocharger are made from
SteelSteel is an alloy that consists mostly of iron and has a carbon content between 0.2% and 2.1% by weight, depending on the grade. Carbon is the most common alloying material for iron, but various other alloying elements are used, such as manganese, chromium, vanadium, and tungsten...
, rather than the
CeramicA ceramic is an inorganic, nonmetallic solid prepared by the action of heat and subsequent cooling. Ceramic materials may have a crystalline or partly crystalline structure, or may be amorphous...
used for the Standard RB26DETT turbochargers. The Ceramic turbine wheels are found to be very unreliable when used at high rotational speeds inducing higher centrifugal forces (such as when the turbochargers are used at a higher boost pressure than stock). With the advances in manufacturing technology such as sealing and material processes, the N1 engine is theoretically said to be able to produce in excess of 1900 bhp
The Nismo RB26DETT N1 Engine Block uses an 86 mm bore which can be bored up to either 87 mm or 88 mm. The N1 block is stamped with an identification mark of 24U, or 25U, whereas the standard RB26DETT block is marked with 05U. The RB26DETT N1 block is compatible with all GT-R engine bays.
Only two R32 GTR Bathurst cars were stripped after the competition. Parts were shipped back to Japan where it's believed some were sold to private parties in New Zealand and Australia.
RB26DETT Z2
This is the engine used in the Nissan Skyline GT-R Z-Tune. It uses the stronger RB26 N-1 block, modified with Nismo parts, bored and stroked to 2.8 L (87.0 x 77.7 mm). The end result was the RB28Z2, which produces 510 bhp (368 kW) and 540 N·m of torque.
RB30
Four models of 3.0 L
RB30 were produced from 1987 - 1991:
- RB30S - carburetted single-cam
- RB30E - fuel-injected single-cam (114 kW at 5,200 rpm, 247 N·m (25.2 kgf·m) at 3,600 rpm)
- RB30E R31 Skyline - fuel-injected single-cam (117 kW at 5,200 rpm, 252 N·m (25.2 kgf·m) at 3,600 rpm)
- RB30ET VL Commodore
The Holden VL Commodore and Calais were a range of mid-sized cars manufactured between 1986 and 1988 by the General Motors Australian arm, Holden...
- fuel-injected single-cam turbo (150 kW at 5,600 rpm, 296 N·m at 3,200 rpm)
This motor was produced for use in the
SkylineThe first Skyline was introduced in April 1957, by the Prince Motor Company, and was marketed as a luxury car. It featured a 1.5 L GA-30 engine producing 44 kW @ 4400 rpm. It used a de Dion tube rear suspension and was capable of 140 km/h . The car weighed around 1300 kg...
s,
PatrolThe Nissan Patrol is a four-wheel drive vehicle manufactured by Nissan in Japan since 1951. In Japan since 1980, it has been known as the Nissan Safari. The Patrol is available in Australasia, Central and South America, South Africa, parts of Southeast Asia and Western Europe as well as Iran and...
s and rights bought by
HoldenGM Holden Ltd is an automaker that operates in Australia, based in Port Melbourne, Victoria. The company was founded in 1856 as a saddlery manufacturer. In 1908 it moved into the automotive field, before becoming a subsidiary of the U.S.-based General Motors in 1931...
because the Holden 202 (3.3 L) powering the
Holden CommodoreThe Holden Commodore is an automobile manufactured since 1978 by the Holden subsidiary of General Motors in Australia, and, formerly, in New Zealand. In the mid-1970s, Holden established proposals to replace the long-serving Kingswood nameplate with a smaller, Opel-based model...
could no longer satisfy tightening emissions requirements, and with all new cars required to run on unleaded petrol by 1986 a quick replacement was needed. Nissan Motor Co. sold the RB30E to
HoldenGM Holden Ltd is an automaker that operates in Australia, based in Port Melbourne, Victoria. The company was founded in 1856 as a saddlery manufacturer. In 1908 it moved into the automotive field, before becoming a subsidiary of the U.S.-based General Motors in 1931...
for the
VL CommodoreThe Holden VL Commodore and Calais were a range of mid-sized cars manufactured between 1986 and 1988 by the General Motors Australian arm, Holden...
. Because the radiator is fitted lower in relation to the engine in the VL, there is an increased likelihood of air locks forming in the (alloy) cylinder head, causing this to overheat and warp. This was less likely in the R31 Skyline as the radiator is mounted higher. The engine proved to be very reliable apart from this issue. The RB30S was found in some Middle Eastern R31 Skylines and in some Nissan Patrols. The RB30E was found in R31 Skylines and VL Commodores in Australia as well as in South African R31 Skylines (with 126 kW at 5,000 rpm and 260 Nm at 3,500 rpm)
The turbocharged RB30ET (producing 150 kW) was found only in the
VL CommodoreThe Holden VL Commodore and Calais were a range of mid-sized cars manufactured between 1986 and 1988 by the General Motors Australian arm, Holden...
(available in all models) and consisted of a lower compression RB30E bottom end, more powerful oil pump, T3 Garrett turbocharger, 250 cc injectors and a different intake manifold. The motor itself is still popular today (albeit in highly modified form) on the Australian Drag Racing circuit.
Nissan Special Vehicles Division Australia produced two limited models of R31 Skylines, the GTS1 and GTS2. These contained slightly more powerful RB30E engines, containing longer opening duration cams and better flowing exhausts.
- GTS1 RB30E - injected single-cam (130 kW at 5,500 rpm, 255 Nm (26.0 kgf·m) at 3,500 rpm) - special cam profile, special exhaust
- GTS2 RB30E - injected single-cam (140 kW at 5,600 rpm, 270 N·m (27.5 kgf·m) at 4,400 rpm) - special cam profile, special exhaust, piggy back computer, valve porting
RB30DE
These rare engines were used in the
Tommy Kaira, formally , is a Japanese car tuning and manufacturing company founded on May 1, 2002 and headquartered in Minami-ku, Kyoto, Japan. The company was named after its two founders, Yoshikazu Tomita and Kikuo Kaira. Its parent company was originally founded in 1968 as...
M30 based on the R31 Skyline GTS-R. A modified RB20DE head was bolted on to the RB30E block. It delivered 177 kW (240 PS) @ 7000 rpm and 294 N·m (30.0 kgf·m) @ 4800 rpm.
RB30DET
Nissan did not produce this engine, but it refers to a turbocharged engine featuring an RB30E block with a twin-cam head conversion. Common hybrid in
AustralasiaAustralasia is a region of Oceania comprising Australia, New Zealand, the island of New Guinea, and neighbouring islands in the Pacific Ocean. The term was coined by Charles de Brosses in Histoire des navigations aux terres australes...
(referred to as the RB25/30 or RB26/30) using a RB30E bottom end mated to a RB25DE,RB25DET or RB26DETT cylinder head and turbo (RB20DE and DET heads are not used as the bores are different in size; RB30 86.0 mm RB20 78.0 mm but were originally modified and used on the Tommy Kaira RB30DE as the RB25 engine did not exist). The RB25DE cylinder head from the A31 Cefiro C33 Laurel or R32 skyline (aka: Non VCT) can be used, and fits perfectly on (although better valve springs are recommended, GT-R valve springs are a decent upgrade). The RB25DET (from the R33 Skyline or C34 Laurel or Stagea) head is also used, however an external oil feed must be fabricated for the variable cam timing (VCT) on the RB25DET, and the galleries at the front of the engine do not line up. The variable cam timing may be disconnected altogether.Also it is wise to change the oil restrictors in the block to 1.5mm and get a full face oil pump drive collar machined onto the crank(solves it shattering at high RPM) with the use of a twin cam oil pump.
The fitment of a twin cam head from any of these engines onto a standard compression RB30E bottom end gives an ideal compression ratio for a mild to moderately modified street turbo engine around 8.2:1, (but always check your compression when building this engine as it may vary), making the conversion popular amongst those who would otherwise convert their RB30E to a high compression RB30ET using original ET bolt on externals.
Although it has a larger displacement than the RB26DETT, maximum possible horsepower is less, as the RB30 block lacks the RB26 block's internal cast-in bracing, and consequently cannot rev as high due to harmonic issues at ~7500 rpm. To compensate, the RB30DET produces more torque at lower revs due to its longer stroke. However they have been known to reach engine speeds up to 11,000 rpm with a lot of balancing and the use of the RB26 head with solid lifters. Power of the RB30DET in this form can far exceed that of an RB26DETT, RB30DET's are usually only found in
RWDIn automotive design, an FR, or Front-engine, Rear-wheel drive layout is one where the engine is located at the front of the vehicle and driven wheels are located at the rear. This was the traditional automobile layout for most of the 20th century....
cars as it's a lot easier to install, with the 4wd setup in the GTR or GTS4 an adapter plate has to be made to fit the 4WD sump as its bolt pattern is different to the RB30, as there is a adapter plate between the sump it sits off on the gearbox bolt holes, they will have to be modified to fit.
There is also an 'RB30DETT' kit manufactured by OS Giken of Japan, which bolts an extension on top of the RB26 engine block, and fits liners, to give an 86 mm bore x 86 mm stroke. It is available as an assembled short block, containing billet chrome-molybdenum crank, billet chrome-molybdenum H-beam connecting rods, forged pistons, and costs ¥1,500,000.
RB-X GT2 & RB28DET
The
RB-X GT2 (designed and built by
REINIK) is an engine specially made for the
Nismo 400RThe Nissan Skyline GT-R is a Japanese sports car based on the Nissan Skyline range.The first GT-Rs were produced from 1969–1973. After a 16 year hiatus since the KPGC110 in 1972, the GT-R name was revived in 1989 with the Skyline R32. This car was nicknamed "Godzilla" by the Australian motoring...
. The difference between this engine and a RB26DETT is that the engine is bored and stroked (87.0 × 77.7 mm) which results in 2771 cc. Engine produces 450 PS (331 kW or 443 HP) at 6800 rpm and 47.8 kgf·m (469 N·m or 347 lbf·ft) at 4400 rpm.
This engine was manufactured with a reinforced cylinder block and cylinder head, metal head gasket, pistons with cooling channels, forged crank shaft, forged connecting rods, N1 turbine with reinforced actuator, high flow air cleaner, stainless down pipe, and low air resistance sport catalyzer, most of which were not offered for the RB26DETT. RB-X GT2 engines competed in LeMans 24hr race, Pikes Peak, and other forms of motorsports. GT500 and Z-tune engines are also based on REINIK's design although now built by NISMO's Omori Factory.
REINIK also made over 20
RB28DET based on the R33 RB25DET. These engines were ordered by Prince Nissan Dealership network for a special edition R33 GT25t called
280 Type-MR. The engine was build for high torque and limited to 300 PS.