Jean 58

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The Weslake 58, also known as the Weslake 3000, was a racing engine that was used in monopostos as well as in racing cars .

Technical specifications

The Weslake 58 was a 3-liter 12-cylinder - naturally aspirated engine , which in 1966 Weslake was developed. The engine had a four-valve cylinder head and a high compression of 12: 1. This engine was the first real four-valve engine in the new 3-liter formula of Formula 1 that came into force in 1966 . The high-revving racing engine had a high piston speed with a value of 21.1 m / s. Due to the small distance between the cylinders, the engine had a long stroke: with a bore of 72.8 mm and a stroke of 60.3 mm, the Weslake 58 was the racing engine with the smallest bore and the longest stroke of its time. In its original form, the engine developed 271 kW (364 hp), which could later be increased to up to 420 hp.

The engine was very light at 175 kg for a twelve-cylinder and with a length of 67.4 cm shorter than all other twelve-cylinder racing engines of the 1960s. The engine was 12.4 cm longer than the Cosworth V8 , but 20 cm narrower.

commitment

The engine was used in Formula 1 in the Eagle T1G , with which Dan Gurney won the Belgian Grand Prix in 1967 . It was not used in the Mirage M6 in 1973 due to technical problems.

literature

  • Gert Hack, Fritz Indra: Formula 1 engines. Achievement at Limit Motorbuch Verlag, Stuttgart 1997, ISBN 3-613-01803-9 , p. 184ff.