Standard YB Valve Sizes?? And 500+???
08-04-2007, 11:01 AM
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Standard YB Valve Sizes?? And 500+???
Just a quicky, as above what are standard YB intake and exhaust valve sizes and what do they go up to for 500+bhp heads?
I think I remember 36.5mm inlet and 32mm exhaust on a 500 engine at some point??
08-04-2007, 01:48 PM
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No one know?????
08-04-2007, 04:06 PM
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No sure but my exhaust valves are 34.14
08-04-2007, 10:07 PM
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i have standard valves on my CNC head.
08-04-2007, 10:12 PM
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What's CNC head? And what are your standard valve size then???
08-04-2007, 10:15 PM
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35mm inlet, 31mm exhaust i believe...
it will defo need headwork to do over 500bhp, but the valves are fine
08-04-2007, 10:16 PM
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CNC are the company that flowed and ported my head.
08-04-2007, 10:18 PM
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Thanks guys, helped me out a bit then!!!
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08-04-2007, 11:01 AM
Standard YB Valve Sizes?? And 500+???
