Here are some basic specs for those looking to know the differences on the Nissan SR20DET Engines. There have been basically 3 generations of the SR20DET. Which one is better, it doesn't really matter, especially since there are very few engines out there that will be left stock for very long. Most customers will install them as stock as possible, but will soon upgrade fuel, turbo, intake, and intercooler, if they have not done so already when they order a conversion package.
Specifications for RED Top SR20DET
180SX 91-93 and Silvia 91-93
Displacement: 1998cc (2.0 liter)
Cam type: DOHC 16 valve, chain driven cam sprockets
Bore and stroke: 86mm x 86mm
Compression: 8.5 : 1
Horsepower: 205ps at 6000rpm
Torque: 203 ft/lbs at 4000rpm
Stock boost: 7 psi
Throttle body bore: 60mm
Injector size: 370cc/min
Turbo specs:
Compressor: T-25, 60 trim 56mm BCI-1 compressor.
Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.
Center Section: Journal bearings
Performance:
The stock turbo will be safe to 13-15 psi. After that, the turbo is past its efficiency range, and power increases will fall off and are not worth the risk of turbo damage. The engine should produce 230-250 RWHP at safe boost.
Specifications for Black Top SR20DET
180SX 94-98
Displacement: 1998cc (2.0 liter)
Cam type: DOHC 16 valve, chain driven cam sprockets
Bore and stroke: 86mm x 86mm
Compression: 8.5 : 1
Horsepower: 205hp at 6000rpm
Torque: 203 ft/lbs at 4000rpm
Stock boost: 7 psi
Throttle body bore: 60mm
Injector size: 370cc/min
Turbo specs:
Compressor: T-25, 60 trim 56mm BCI-1 compressor.
Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.
Center Section: Journal bearings
Performance:
The stock turbo will be safe to 13-15 psi. After that, the turbo is past its efficiency range, and power increases will fall off and are not worth the risk of turbo damage. The engine should produce 230-250 RWHP at safe boost.
Specifications for Black Top S14 T28 VTC
Silvia 95-98
Horsepower: 220hp at 6000rpm
Torque: 203 ft/lbs at 4800rpm
Turbo specs:
Compressor: T-28, 60 trim 60 mm BCI-1 compressor in T-04B housing
Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.
Center Section: Ball Bearing
S14 SR20DET's use a different ECU and harness, these are extremely expensive and hard to find.
Variable valve timing system and a different turbo are the significant changes from the S13 SR20DET engines.
S13 uses 'low port' intake design vs. S14 'high port' design.
Performance:
The stock turbo will be safe to 13-15 psi. After that, the turbo is past its efficiency range, and power increases will fall off and are not worth the risk of turbo damage. The stock engine should produce 250-260 RWHP at safe boost using stock turbo. Upgrading turbo, fuel and rest of need parts will yield 300-375.
Specifications S15 Black Top SR20DET
S15 Silvia 99-
Horsepower: 250ps at 6000rpm
Transmission: 6 Speed, Close Ratio
Injector size: 480cc/min
Turbo specs:
Compressor: T-28, 60 trim 60 mm BCI-1 compressor in T-04B housing
Turbine: Inconel turbine wheel. Cast divider wall between turbine discharge and wastegate.
Center Section: Ball Bearing
This engine is expensive and hard to get. If you are on a tight budget, please consider other options as the money you save from buying this engine can be better used to build up a really nice Red Top.
Additions: 6 speed manual transmission. The 6 speed cannot be used on the S13 and S14 motors, and uses a different driveshaft. Speed sensor is located in the differential. The 6 speed is cool, but is not as strong as the 5 speed from the older cars. There is basically 6 gears inside the same housing that was designed to hold 5 gears. This makes the gears smaller and weaker, therby breaking more often.
