How do the valves operate in racing engines

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Offline syhprum

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How do the valves operate in racing engines
« on: 18/04/2010 13:38:56 »
During my lifetime the maximum revs on racing engines have gone up from 6000 rpm to at least 20000 rpm how is it managed ?
Daimler Benz experimented with Desdromonic operation in the fifties but this proved to be a dead end.
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Offline LeeE

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How do the valves operate in racing engines
« Reply #1 on: 18/04/2010 14:02:49 »
It has mostly achieved by lightening the parts and making them to very high tolerances so that the moving parts can be balanced to a very high degree.  The Honda 5 cylinder 125 cc racing motorcycles of the early/mid 1960s used to rev to 22000 rpm.
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