Nissan FJ engine
Motor vehicle engine / From Wikipedia, the free encyclopedia
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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.
| 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) |
| Block material | Cast Iron |
| Head material | Aluminium |
| Valvetrain | DOHC 4 valves x cyl. |
| Timing 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 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]. It 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 valvetrain design similar to other (later) Nissan twincams like the VG, CA, RB, and KA, series DOHC motors and the previous S20 6 cyl 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. 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.