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| Re: Equally Sized Valves |
Subject: Re: Equally Sized Valves
by D on 2013/6/16 14:41:01
There is no gain to have an exhaust 1mm smaller if thats what you mean?
The exhaust has 4 times more pressure behind it than the inlet charge
so best use a ratio of inlet vs exhaust valve size around 100/80.
eg.
40mm inlet x 0.8 = 32mm exhaust
40mm inlet / 32mm exhaust
Still a stock H89 head has perfect valves and ports from stock for turbo
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