Bore to Stroke Ratio
- Thread starter Dan the man
- Start date
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OldmanRick
Well-Known Member
From a online article years back.....
"Formula 1 engines have an extremely short stroke, only 1.566 inches. The bore size is limited to a maximum of 3.858 inches. This is a very oversquare design, but one that allows these engines to rev to an incredible 20,000 RPM and squeeze 800 horsepower out of 2.4 liters of displacement! One of the reasons they are able to rev so high is the extremely short stroke. The pistons are not moving up and down very far in their bores. The stroke/bore ratio is only 0.4, which is less than half that of a typical passenger car engine. At 20,000 RPM, the relative piston speed in a Formula 1 engine is 5,248 feet per minute. Formula 1 engines also use a pneumatic valve system that is far faster than any mechanical valvetrain."
Anybody up for a 318 with a 1.5" crank.....
"Formula 1 engines have an extremely short stroke, only 1.566 inches. The bore size is limited to a maximum of 3.858 inches. This is a very oversquare design, but one that allows these engines to rev to an incredible 20,000 RPM and squeeze 800 horsepower out of 2.4 liters of displacement! One of the reasons they are able to rev so high is the extremely short stroke. The pistons are not moving up and down very far in their bores. The stroke/bore ratio is only 0.4, which is less than half that of a typical passenger car engine. At 20,000 RPM, the relative piston speed in a Formula 1 engine is 5,248 feet per minute. Formula 1 engines also use a pneumatic valve system that is far faster than any mechanical valvetrain."
Anybody up for a 318 with a 1.5" crank.....
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