Yamaha OX77 engine

The Yamaha OX77 is a naturally aspirated gasoline-powered 3.0 L (180 cu in) V8 racing engine, developed and built by Yamaha for Formula 3000, specifically the Japanese Formula 3000 Championship, between 1987 and 1988. It is derived from the Cosworth DFV engine,^[2] but uses 5 valves per cylinder instead of the DFV's 4.^[3]

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)
Cylinder block material	Aluminum alloy
Cylinder head material	Aluminum alloy
Valvetrain	5-valve 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)
Chronology
Predecessor	Yamaha OX66
Successor	Yamaha OX88

This engine notably won the 1988 Japanese Formula 3000 Championship, being driven by Aguri Suzuki.^[2][4][5][6]