Subaru EJ engine
The Subaru EJ engine is a series of four-stroke automotive engines manufactured by Subaru. They were introduced in 1989, intended to succeed the previous Subaru EA engine. The EJ series was the mainstay of Subaru's engine line, with all engines of this series being 16-valve horizontal flat-fours, with configurations available for single, or double-overhead camshaft arrangements (SOHC or DOHC). Naturally aspirated and turbocharged versions are available, ranging from 96 to 310 hp (72 to 231 kW; 97 to 314 PS). These engines are commonly used in light aircraft, kit cars and engine swaps into air-cooled Volkswagens, and are also popular as a swap into copy wasserboxer engined Volkswagen T3/Vanagon. Primary engineering on the EJ series was done by Masayuki Kodama, Takemasa Yamada and Shuji Sawafuji of Fuji Heavy Industries, Subaru's parent company.
| Subaru EJ engine | |
|---|---|
| Overview | |
| Manufacturer | Subaru |
| Production | 1988–2021 (EJ20) |
| Layout | |
| Configuration | Flat-four |
| Displacement | 1.5 L; 91.1 cu in (1,493 cc) 1.6 L; 97.5 cu in (1,597 cc) 1.8 L; 111.1 cu in (1,820 cc) 2.0 L; 121.7 cu in (1,994 cc) 2.2 L; 135.0 cu in (2,212 cc) 2.5 L; 149.9 cu in (2,457 cc) |
| Cylinder bore | 85 mm (3.35 in) 87.9 mm (3.46 in) 92 mm (3.62 in) 96.9 mm (3.81 in) 99.5 mm (3.92 in) |
| Piston stroke | 65.8 mm (2.59 in) 75 mm (2.95 in) 79 mm (3.11 in) |
| Valvetrain | DOHC/SOHC 4 valves x cyl. with AVCS or AVLS (some versions) |
| Compression ratio | 8.0:1, 8.5:1, 9.0:1, 9.4:1, 9.5:1, 9.7:1, 10.0:1 |
| Combustion | |
| Turbocharger | Optional |
| Fuel system | Carburetor, Fuel injection |
| Fuel type | Gasoline |
| Cooling system | Water cooled |
| Output | |
| Power output | 96 to 310 hp (72 to 231 kW; 97 to 314 PS) |
| Torque output | 129 to 407 N⋅m (95 to 300 lb⋅ft) |
| Chronology | |
| Predecessor | Subaru EA engine |
| Successor | Subaru FB engine |