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[Datsun 1200 encyclopedia]

FJ engine swap

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Categories: Engine Modifications | Engine Swaps | Nissan Engines

The Nissan FJ 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 with the turbo version at 366 lbs, heavier than the 318 lb Rover V8 Engine/Buick V8 3.5 liter engine and 36 pounds heavier than the SR20 turbo. The FJ engine was produced in three variations: 1) FJ24E 2) FJ20E 3) FJ20ET.



Aside from the very strong block which can survive massive power, the reason the FJ was so powerful was the 4-valve-per-cylinder head. It was Nissan's first mass produced 16-valve four-cylinder engine, a spiritual successor to the 1969 Skyline GT-R S20 4-valve six-cylinder. In 1985 the CA18DE would replace the FJ, being Far, far lighter and more suitable for a range of roadgoing car, and yet with a block still capable of surviving 400hp. In turn, a larger displacement engine, the SR20, replaced the CA18DE.

For general information, see:

PRO12T and FJ20ET Turbo
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The mighty FJ20E makes 148 HP from 2-liters, and with a turbo the FJ20ET makes up to 203 HP in stock form.

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The only FJ 1200 in Japan
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Although it is heavier than a GM 3800 V6, the FJ fits somewhat better into a 1200's engine bay. It looks most excellent, doesn't it?
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FJ Engine Source:

  • 1982-1983 Nissan Silvia BS110 '240RS' 240 HP, Works 275 HP
    400px-Nissan_Silvia_S110.jpgWIKI click for photo 4117.jpgAlbum 4117
  • 1983-1988 Nissan Silvia S12 FJ20E 150 PS, FJ20ET 190 PS, FJ20ET inter-cooled 205 PS
    400px-Nissan_200sx_SE.jpgWIKI click for photo
  • 1982-1985 Nissan Skyline DR30 '2000RS' FJ20E 110kw
    3322.jpgAlbum 3322 4678.jpgAlbum 4678
  • 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
    400px-LD4C4288.jpgWIKI click for photo 400px-LD4C4250.jpgWIKI click for photo

Which is better? FJ20 or SR20?


  • make about the same HP in stock form (SR20DE 140-169HP, F20E 148 HP)
  • In turbo versions, both are too large for as 1200 (too large for normal engineering process) in Australian. In this country, 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


  • 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.

FJ-powered 1200s

34 PSI

Pooley's POST 34 PSI
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Blake's Coupe

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Collingrove Coupe

Collingrove hill climb
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POST And my story begins
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Santo Di Pietro's ute out of New South Wales with FJ power.

Fast Fours November 2014
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Hot4s 257
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Sandy's fj1200
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POST Joshh's FJ20et 1200 ute FJ2020

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FJ2020 on Simmons FR
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FJ2020 on Convo rims
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Montery Park Coupe



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Pink Ute

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Racingfuji's Coupe

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White FJ20 1200 Ute at 2011 DATNATS
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SLUG at 2010 Powercruise 23
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orange OFJ020
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Paul Stanek's IPC Turbo Charging B110 Coupe
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POST SuPeR's ute
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Main: TIG20T


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FJ-powered wagon 'YFJ20T'
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FJ-powered B210

George Fury 120Y

Jamie Drummond-built Datsun 120Y "Grunt20Y" that was driven by George Fury during the 1980s.

POST George Fury 120 Y /FJ24
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 V I D E O  George Fury Datsun 120Y Rally (click to view)
 V I D E O  George Fury Datsun 120Y @ WRC Coff Harbour (click to view)

Graeme Adair

FJ20 twin carbed 120Y coupe race car
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Sleeper 120Y Sedan

Sleeper 120Y 'YAF49U' spotted at 2005 South Coast Nationals
Sleeper.jpgPost click for topic Sleeper1.jpgPost click for topic SleeperDatto.jpgPost click for topic

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Y Be Normal Coupe

Y4's FJ-powered B210 'QLS216' NSW: Y Be Normal! -Datsun 120y (As Featured in Hot 4's No.27)

120Ys were a bit of a lemon, but the only lemon thing about this one is the paint

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  • EXTERIOR: Lemon yellow tinter paintwork, 15x8" Dragway Carma wheels and 205/50 tyres
  • INTERIOR: Maxrob steering wheel, Razo pedals and autometer gauges, 3 tone retrimmed velour interior
  • ENGINE: FJ20ET turbo

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FJ-powered B310

datman55's FJ20T in Datsun B310

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183hp at the rear wheels with 850lb of torque, at 6,000rpm with a 36mm restrictor and 15 psi boost
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more photos

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Dry sump FJ
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Fire Rings
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510 Swaps

Datsun 510 Bluebird

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PRO 510 in Australia
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810 Swaps

Datsun 810 Bluebird

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Swap Notes


The FJ distributor uses Nissan Optical CAS for EFI computer signaling. See FJ CAS.

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.

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

22100-R2007 DR7 type

FJ20 timing plate

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