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The Nissan "RB Series" In-line 6 Cylinder Engines - Designed and Built For Performance!

Contributed By: Steve Chong, IZCC#2434, Tom Ukai, IZCC #1334, Brian Dooley IZCC#693, Carl Beck, IZCC #260 & David Smith, IZCC #????

Engine Designation:
RB = Race Build (my guess;-)
x0 = 2 Liter, 2.5 Liter, 2.6 Liter or 3.0 Liter engine
 D = Duel Overhead Cam
 E = ECCS (Electronic Concentrated Control System *1)
 T = Turbo
TT = Twin Turbo

Note *1: This is Nissan's electronic fuel injection system, which
consists of the main computer (the Electronic Control Unit or ECU), and 
all sensors and actuators connected to the ECU. This includes items such 
as injectors, airflow meter, temperature sensors, etc.

Engine Spec.'s

        Eng./Size: 1988cc    
             Head: Alum., Crossflow, ?valve, Single Cam        
         Ignition: Transistor/Electronic   
 Induction System: EFI     
      Compression: ??
    Bore & Stroke: ??
            Block: Cast Iron, deep skirt design
            Turbo: N/A
               HP: ??
          Redline: ??

Engine Spec.'s

        Eng./Size: 1988cc    
             Head: Alum., Crossflow, 4valve, Duel Cam        
         Ignition: Transistor/Electronic   
 Induction System: EFI     
      Compression: ??
    Bore & Stroke: ??
            Block: Cast Iron, deep skirt design
            Turbo: N/A
               HP: 180 HP @ 6400RPM
           Torque: 135 ft. lb.@5200RPM
          Redline: 7000 RPM

Engine Spec.'s
RB20DET:

        Eng./Size: 1998cc    
             Head: Alum., Crossflow, 4valve, Duel Cam        
         Ignition: Transistor/Electronic   
 Induction System: EFI     
      Compression: 8.8:1
    Bore & Stroke:
            Block: Cast Iron, deep skirt design
            Turbo: Ceramic Coated
               HP:
          Redline:
Note 1: - In Japan:optiona l engine in the Cefiro from 1988, Standard engine
in the R32 Skyline GTS-t 1989-1992)

Note 2: - RB20DET from the R31 Skyline has 190 hp, redline  @7000 rpm
and can be identifed by a) Red colored cam cover, which is ribbed, and b) the
inlet manifold pipes for cylinders 3 & 4 which are not siamesed.

        Eng./Size: 2498cc   
             Head: Alum., Crossflow, 4valve, Duel Cam        
         Ignition: Transistor/Electronic    
 Induction System: EFI     
      Compression: 8.8:1
    Bore & Stroke:
            Block: Cast Iron, deep skirt design
               HP: 180HP @6000RPM
           Torque: 166 ft. lbs.@5200RPM
          Redline:            

RB 25DET
Production Started: 19??...
Standard engine in 1993 on Skyline GTS-25t in Japan
Engine Spec.'s:

        Eng./Size: 2498cc   
                Head: Alum., Crossflow, 4valve, Duel Cam        
         Ignition: Transistor/Electronic    
 Induction System: EFI     
      Compression: 8.8:1
    Bore & Stroke:
            Block: Cast Iron, deep skirt design
            Turbo: ??? T3??
               HP: 250HP @6000RPM
           Torque: 217 ft. lbs. @4800RPM
          Redline:

        Eng./Size: 2568cc   
             Head: Alum., Crossflow, 4valve, Duel Cam        
         Ignition: ECCS (Single Coil/Cylinder)    
 Induction System: EFI     
      Compression: 8.5:1
    Bore & Stroke: 86mm X 73.7mm
            Block: Cast Iron, deep skirt design
            Turbo: Twin Turbo's
               HP:
          Redline:

RB 30DET
Production Started: 19??...
Standard engine in the 1985 Fairlady 300ZR....????
Engine Spec.'s:

        Eng./Size: 2988cc   
             Head: Alum., Crossflow, 4valve, Duel Cam        
         Ignition: Transistor/Electronic    
 Induction System: EFI     
      Compression: 8.8:1
    Bore & Stroke:
            Block: Cast Iron, deep skirt design
            Turbo: Twin Turbo's
               HP:
          Redline:

Origins Of The RB Engines

The first production engine, based on the Racing engine was the Nissan S20 engine it was used in the 1969 Fairlady Z 432 & Skyline GT-R. It sported a duel overhead cam, alum. cross flow head with hemispherical combustion chambers and 4 valves per cylinder.

So it would seem that the Racing Engine of 1965/66, lead to the Production engine (S20), which in turn lead to the RB Series of Performance/Production Engines.

Pictured Below is the1969 S20 Installed in the Fairlady Z 432

This S20 engine was also used in the Skyline GT-R according to Brian Long.
Read More About The Fairlady Z 432

1984 The First RB Series Engine, the RB20DET - makes its debut in the R31 Skyline.