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Why don't F1 engines use knife edge cranks? Several reasons. Their super short strokes (on the order of 1.6 inches) means the rotational inertia is near minimum, and their super efficient scavanging systems means not only is there not any oil in the crankcase to generate drag; there isn't even much air. The 2000 Ferrari V10 used a total of 11 scavanging pumps to insure the crankcase operated under a reasonable vacuum.
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91 164L
71 Mangusta
95 164Q
67 S1 E-type FHC
(a little lime on the side
with my pasta please)
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