Quote:
Originally Posted by Chris Uratchko
Exhaust valve size is critical in n/a engine as well. Pumping losses and camshaft compromise shows up fast in n/a engine ... can't mask it. Exhaust is equally important as intake in n/a.
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Chris,
Is it the throat diameter and what ratio do you like to see (int/exh) for a 9,000 to 10,000 rpm 500+ cube engine? I know this may be something you don't want to disclose, but need to ask. I'm wanting to know for my heads.