 |
| 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.