Yamaha OX77 engine
The Yamaha OX77 is a naturally-aspirated, gasoline-powered, 3.0 L (180 cu in), V8 racing engine, designed, developed, and built by Yamaha, for Formula 3000 racing categories, specifically the Japanese Formula 3000 Championship, between 1987 and 1988. It is a modified derivative and variant of the Ford-Cosworth DFV engine, but uses 5-valves per cylinder instead of four.[2] This engine notably won the 1988 Japanese Formula 3000 Championship, being driven by Aguri Suzuki.[3][4][5][6]
| Yamaha OX77[1] | |
|---|---|
 | |
| Overview | |
| Manufacturer | Yamaha |
| Production | 1987–1988 |
| Layout | |
| Configuration | 90° V8 |
| Displacement | 2,997 cc (3 L; 183 cu in) |
| Cylinder bore | 85.67 mm (3.37 in) |
| Piston stroke | 64.9 mm (2.56 in) |
| Block material | Aluminum alloy |
| Head material | Aluminum alloy |
| Valvetrain | 40-valve (five-valves per cylinder), DOHC |
| Combustion | |
| Fuel type | Gasoline |
| Oil system | Dry sump |
| Cooling system | Single water pump |
| Output | |
| Power output | ~ 450 hp (336 kW) |
| Torque output | ~ 260 lb⋅ft (353 N⋅m) |
References
- "Our Stories：24 Taking on Formula One—the Apex of Auto Racing - Yamaha Motor History". Yamaha Motor Co., Ltd.
- "Cosworth/Yamaha F3000 engine". Motor Sport Magazine.
- "Yamaha News Release - September 16, 1994" (PDF). Retrieved 2 October 2022.
- "Yamaha: Zakspeed Killer". March 15, 2016.
- "Cosworth Engines". www.italian.sakura.ne.jp.
- "Yamaha Motor". Retrieved 2 October 2022.
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