Nissan RB engine
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The RB engine is a 2.0 L to 3.0 L straight-6 piston engine from Nissan.
It has an aluminum head with both SOHC/DOHC versions, with the SOHC versions having 2 valves per cylinder and the DOHC versions having 4 valves per cylinder, all cam lobes move only one valve. All have a hemispherical head and All RB engines have belt driven cams and a cast iron block. All turbo models have an intercooled turbo (With the exception of the RB30ET fitted to the Holden Commodore VL), and most have a recirculating factory blow off valve (The exception when fitted in Nissan Laurels and Cefiros) to reduce boost surge when the throttle is closed. All single cam versions are missing the designated "d" from the model number.
From August 1993 RB engines produced also featured variable cam timing (VCT) for the intake cam.
From 1998 the RB25DE/T series was released with a "NEO" head. This enabled the engine to be classed as a LEV (low emission vehicle) engine. With the NEO head, torque and power were further improved although the RB26DETT produced still only 280 PS (206 kW) on paper, according to Nissan factory specs. In reality it produces more than this, but it is underestimated because all main Japanese car manufacturers have a gentlemen's agreement not to produce cars with engines exceeding 206 kW. The "RB" name is misconstrued and thought to represent "rhythm & balance", or "race bred". This is not the case, it simply is a "series designator".
The Nissan CA engine is a 4 cylinder version on the RB engine.
R31 RB20E engine in an R31 Nissan SkylineThere were three 2.0 L RB20 engines produced:
RB20E - single-cam (130 hp)
RB20DE - twin-cam (155 hp)
RB20DET - twin-cam turbo (215 hp)
The first series RB20E/DE/DET engine was fitted to the R31 Skyline and is generally referred to as a "red top" RB engine as it has red cam covers, it used the "NICS" (nissan induction control system) injection system. The non-turbo models were also fitted to various Holdens sold in New Zealand (RB20E). The Z31 200ZR was fitted with an intercooled red top RB20DET.
Laurels, R32 Skyline and Cefiros used the second (1988-1993) series RB20E/DE/DET .This series RB engine has an improved head design over the previous version and used the new "ECCS" (electronically concerntrated control system) injection system. These later motors are known as 'Silver Top' engines.
R34 Skylines and Nissan Stageas used the RB20DE and RB20e (Stagea only) engine with a NEO head. The Neo Rb20de is the most economical Rb engine so far produced, it is classed as LEV (low emission vehicle) engine.
There was only one version of the RB24 engine produced:
RB24s - single-cam
This is a relatively unknown 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 it is made from an RB30e head, RB25de/det block and RB20de/det crank with 34 mm heigh pistons. This engine used carberators instead of the Nissan ECCS fuel injection system. This has the outcome of it being 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 displacment as the RB25de/det. A common modification is to fit a twin cam head from other RB series motors while retaining the carberated set-up. In standard single cam form it produced 141 PS @ 5000 rpm and 20.1 kgfÂ·m of torque @ 4,400 rpm.
1993 RB25DET with VCTThe 2.5 L RB25 engine was produced in three forms:
RB25DE - twin-cam (190 to 200 hp)
RB25DET - twin-cam turbo (245 to 250 hp)
NEO RB25DET - twin-cam turbo (280 hp)
RB25DE and DET engines produced from August 1993 also featured variable cam timing (VCT) for the intake cam. This gave the new RB25DE more power and torque at lower rpm than the previous model.
In May 1998 a NEO head was fitted. This was also a low emission vehicle engine (LEV). The non-VCT and non-turbo was fitted to the R32 Skyline, the VCT turbo and non-turbo was fitted to R33 Skylines and Stageas. R34 Skylines also use these engines, but they are fitted with a NEO head.
The first 2.6 L RB26DETT featured twin turbochargers and produced 280 PS (206 kW) @ 6800 rpm and 260 ftÂ·lbf (353 NÂ·m) @ 4400 rpm. The last series of the RB26DETT produced 280 PS (206 kW) @ 6800 rpm and 289 ftÂ·lbf (392 NÂ·m) @ 4400 rpm. But at "test stand runs" the engine obtain 320 hp and more! It is renowned for its strength and through extensive modification, some examples have been known to produce over 1000 hp (735 kW) and with regular maintenance, many of these engines have been driven way past the 100,000 mile mark with a few heading toward 200,000 miles. 600 hp without internal change in the engine possible. The engine block is strong to 1360 hp (1000 kw)
It was used in the following cars:
Nissan Skyline GT-R R32
Nissan Skyline GT-R R33
Nissan Skyline GT-R R34
Nissan Stagea 260RS
Tommy Kaira ZZII
The motor used in the Nissan Skyline Z-Tune is a 2.8 L. Although the 26 stands for 2.6 L, there was never a Nissan engine called The RB28. It is basically the RB26 motor, modified with Nismo parts, and stroked to 2.8 L. The end result was the RB26 Z2, which puts out 507 hp and 550 NÂ·m of torque. They wanted to do 630 hp, but there was a problem with the emissions values.
The motor is a cast iron block with an alloy head, and a SOHC at 86x86. Three models of 3.0 L RB30 were produced, the carburetted RB30S, the non-turbo RB30E and the turbo RB30ET. This motor was produced because the Holden 202 (3.3l) powering the Holden Commodore could no longer satisfied emissions requirements, and with all new cars required to run on unleaded petrol by 1986, a quick replacement was needed. Nissan Motor co. teamed up with GM to build their biggest displacement RB, the 3-litre RB30.
These rare engines were used in the Tommy Kaira M30 based on the R31 Skyline GTS-R. It delivered 177 kw @ 7000rpm and 294 Nm @ 4800rpm. Apparently the engine was made up of a RB30 bottom end mated to a modified RB20DE head. These engines also exists as a hybrid conversion using a RB30 bottom end and a RB25DE head.
No official version exists but it is referred to by tuners as the engine can be bored to 3 liters. Also refers to a turbocharged engine featuring an RB30E block with a twin-cam head conversion. Common hybrid in Australia using a RB30E bottom end mated to a RB25DE cylinder head and turbo. The RB25DE cylinder head from the R32 Skyline, A31 Cefiro or C33 Laurel can be used. 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 on the RB25DET which further compicates things. As it has a heavier block (relative to the RB26DETT), horsepower has been brought up to 1600HP (compared to 1400HP) at limits of block. There is also an "RB30DETT" kit manufactured by OS Giken of Japan, which simply replaces the stock engine block with a pre-fabricated one, measuring 86mm bore x 86mm stroke and featuring reinforced internals.
The RB-X GT2 (also called REINIK) is an engine specially made for the Nismo 400R. The difference between this engine and a RB26 DETT is the engine is bored to 2771 cmÂ³ which gives out 450 PS (331 kW) at 6,800 rpm and 47.8 kgfÂ·m (469 NÂ·m or 347 lbfÂ·ft) at 4,400 rpm. This engine comes with a reinforced cylinder block, cylinder head, 87 metal head gasket t=1.2, piston with cooling channel, forged crank shaft, forged connecting rods, N1 turbine with reinforcement actuator, high flow air cleaner, stainless down pipe amd low air resistance sport catalizer, most of which is not offered on the RB26DETT.
This is a 2.8L diesel engine that is fitted to some Nissan Laurels. The Nissan RD engine series is practically the same as the RB series but runs on diesel. It is a single over head cam engine with electronic fuel injection. These engines are usually found on the Nissan Laurel and has a 2.8L capacity. RD engine owners have been known to replace the engine head with a higher quality custom head to convert the engine to petrol, thus creating a 2.8L petrol engine..