In the current F1 engines the CR is in the order of about 13, limited mainly for geometrical reasons.
ib141 wrote:Odin did you mean HP=torque*RPM/63000 or HP=(torque*RPM)/63000?
bcsolutions wrote:I stand corrected!! Thanks reca.
No, the old “for a given displacement short stroke means less leverage hence less torque” is a false myth, for a given displacement the amount of peak torque is pretty much independent by the bore/stroke ratio.
Guest wrote:Since the distance from the centerline of the crankshaft to rod journal centerline decreases with reduced stroke, it's just simple, basic leverage rules that apply. The piston is pushing down at a certain force, and decreasing the lever arm will lead to reduced torque at the crankshaft.
Power = torque * rotational speed
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