The F20DET engine was basically a detuned race engine, a bit heavy but possibly Nissan's strongest ever engine. The stock engine can take massive boost and survive, while turning out incredible horsepower. Originally designed as the FJ24 for use in 240RS racing cars, it was in mass production as the FJ20 engine fitted to the DR30 Nissan Skyline. The FJ engine is very heavy at 366 lbs, heavier than the 318 lb Buick V8 3.5 liter engine. The FJ engine was produced in three variations: 1) FJ24E 2) FJ20E 3) FJ20ET.
Also see: http://FJ20.com
The mighty FJ20E makes 148 HP from 2-liters, and with a turbo the FJ20ET makes up to 203 HP in stock form.
FJ Engine Source:
- 1982-1983 Nissan Silvia BS110 '240RS' 240 HP, Works 275 HP
- 1983-1988 Nissan Silvia S12 'FJ20E 150 PS, FJ20ET 190 PS, FJ20ET inter-cooled 205 PS
- 1982-1985 Nissan Skyline DR30 '2000RS' FJ20E 110kw
- 1983-1984 Nissan Skyline DR30 '2000RS Turbo' or 'RS-X Turbo' FJ20ET 140kw
- 1984-1985 Nissan Skyline DR30 'RS-X Turbo C' FJ20E 151 kw
Which is better? FJ20 or SR20?
- make about the same HP in stock form (SR20DE 140-169HP, F20E 150 HP)
- In turbo versions, both are too large for as 1200 (too large for normal engineering process) in most Australian states. In these States, the CA18DET is better than SR20DET or FJ20ET for street cars.
- In stock condition, can take more boost than SR20DET, thus more HP without opening the engine up
- Much lighter, so won't be as detrimental to handling
- More were produced, so prices are lower
- FJ20 has all the usual build-up parts, same as SR20. However as less FJs were produced, so too the market for FJ parts is more expensive than SR parts.
If converting to carbureted, use a standard distributor. The distributor from a Datsun A12 engine fits into the FJ20 engine block, but you need to change drive gear from A12 to FJ20 drive gear.
If the distributor is missing, use an A12 Datsun or Austin mini distributor. An A12 electronic ignition distributor is preferred so you can use the output to an aftermarket ECU.
22100 DISTRIBUTOR ASSY R30 (8108-9003) FJ20E & FJ20T 22100-R2000 8110-8206 ハーネス L=410 MM [FJ20E only] 22100-R2007 8206-8308 ハーネス L=580 MM マイナー マ デ 22100-R2001 8308-8601 Hitachi マイナ ゴ センヨウ 22100-R2002 8601-8612 Hitachi 22100-R2003 8612-9003 Hitachi
FJ20 timing plate