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Big valve head

Discussion in '8-valve' started by JamesB, Jul 4, 2005.

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JAMESB

JamesB Forum Member

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Cambridge

Golf GTI Performance Manual by Tim Styles said:

Any larger than 40.5mm inlet valves (42mm is the largest available) will not flow as much air because of the shrouding effect of the sides of the combustion chamber. As the valve opens the air gets trapped against the edge of this chamber, whereas with a slightly smaller valve it has room to escape
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JamesB, Jul 7, 2005

#41

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