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YB Valve sizes for 500 bhp plus

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Old 10-01-2010, 05:51 PM
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eazy_ways
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Default YB Valve sizes for 500 bhp plus
Hi, been looking at various data for yb tuning and have repeatably seen reference to port sizes for 500-600 bhp but no dimensions for the valves that go with this spec to remove the restriction associated with them?. Anybody know?, also what cam combination works well in the band and how much work is required to allow fitment of these cams (presuming that they are going to have significant lift).
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Old 10-01-2010, 07:50 PM
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Mark Shead
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Nothing wrong with stock valves.

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Old 10-01-2010, 08:26 PM
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Default when do they become a limiting factor?
at what point do they become a limiting factor?
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Old 10-01-2010, 08:30 PM
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Originally Posted by eazy_ways
at what point do they become a limiting factor?
800hp.

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Old 10-01-2010, 08:36 PM
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Thats nice to know, thanks a lot. What about suitable cams?
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Old 12-01-2010, 12:40 PM
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Originally Posted by eazy_ways
Thats nice to know, thanks a lot. What about suitable cams?

Come on John



Just buy my engine
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Old 12-01-2010, 06:46 PM
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Default Would luv to
Would luv too, but just got past christmas and booked a summer holiday. Bad timing.
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