Cosworth DFV

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The DFV is an internal combustion engine that was originally produced by Cosworth for Formula One motor racing. Named Four Valve because of the four valves per cylinder, and Double as it was a V8 development of the earlier, four cylinder FVA (four valve type A engine), making it a Double Four Valve engine. Its development in 1967 for Colin Chapman's Team Lotus was sponsored by Ford. The engine was a 90 degree, (3.373 x 2.555 in) 2,992.98 cc V8, and produced over 400 bhp (408 bhp at 9,000 rpm, torque at 7,000 rpm was quoted) from the start, reaching over 500 bhp (510 bhp at 11,200 rpm was quoted) by the end of its remarkable Formula 1 career. The 1983 (3.543 x 2.316 in) 2,993.38 cc DFY variant gave 520-530 bhp at 11,000 rpm, torque at 8,500 rpm. For many years it was the dominant engine in Formula One, and it was also used in other categories, including CART, Formula 3000 and Sportscar racing.


In 1965, the Fédération Internationale de l'Automobile, that administered Formula One racing, agreed to raise the series' maximum engine capacity from to from 1966. Up until that point, Colin Chapman's successful Team Lotus cars had relied on power from fast revving Coventry Climax engines, but with the change in regulations Coventry Climax decided for business reasons not to develop a large...
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