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Reciprocating internal combustion engine
Nissan FJ engine
FJ20ET engine in the Nissan Engine Museum
Overview
Manufacturer
Nissan Machinery
Layout
Configuration
Straight-4
Displacement
2.0–2.3 L (1,990–2,340 cc)
Cylinder bore
89 mm (3.5 in) 92 mm (3.62 in)
Piston stroke
80 mm (3.15 in) 88 mm (3.46 in)
Cylinder block material
Cast Iron
Cylinder head material
Aluminium
Valvetrain
DOHC 4 valves x cyl.
Valvetrain drive system
Timing Chain
Compression ratio
8.0:1-11.0:1
Combustion
Turbocharger
On some versions
Fuel system
Carburetor Electronic fuel injection
Fuel type
Gasoline
Oil system
Wet sump
Cooling system
Water-cooled
Output
Power output
150–275 PS (110–202 kW; 148–271 hp)
Torque output
18.5–25 kg⋅m (181–245 N⋅m; 134–181 lb⋅ft)
Dimensions
Dry weight
167 kg (368 lb)
The FJ engine was a series of straight-4 four-valve DOHC 2.0- or 2.4–litre internal combustion engines produced by Nissan in the 1980s. They were one of the first mass-produced Japanese engines with more than two valves per cylinder, as well as having electronic fuel injection.
The FJ series came in 2.4 L guise as a rally motor for the 240RS and 2.0 L for general production models. A 1.5 L variant was designed and a prototype was built, however it never went into production.[citation needed]
The FJ series has an aluminium head, chain driven cams, and an iron block. It featured large ports, dual valve-springs and a wide angle bucket on shim valve-train design similar to other (later) Nissan twin-cams such as the VG, CA, RB, and KA series DOHC motors as well as the previous S20 straight-6 DOHC motor from the early 1970s GT-R. The FJ20 weighs 166 kg (366 lb) while the FJ24 weighs 167 kg (368 lb). Turbo motors were only available in Japan and New Zealand while the non-turbo variants were available in Japan, Hong-Kong, Australia and Europe. It was discontinued in the mid-1980s due to its prohibitive cost (mainly due to its cast-iron block).[citation needed]
It is acclaimed by some as the forefather of the CA engine.[citation needed] Although the DOHC CA head is similar, this is unlikely, as the SOHC CA head was devised as a lightweight replacement for the L/Z series motors when the FJ first entered production, and the DOHC CA head appeared later when the RB series was released around the same time as the DOHC CA engines. Datsun enthusiasts like to swap FJ engines into L or Z series-powered vehicles. The FJ has similar mounting points to L/Z/KA blocks.
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