How much hp gain with +1mm valves?
01-12-2010, 11:45 AM
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FWIW according to Rebello +1 on the intakes takes a lot of extra porting work to make em flow. +1 on the exhaust OTOH requires little extra work.
They claim something like +5% flow over stock size valves if the latter is ported. Porting by itself gains more.
They claim something like +5% flow over stock size valves if the latter is ported. Porting by itself gains more.
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