Originally Posted by
Oranoco
I believe you can fit harder valve seats but 95 isn't as knock resistant so why would you sped out to go slower?
not sure what sped out is, on an old cvh at 7 psi boost i doubt you would notice the difference between parafin or 105 octane. But when its tuned a bit and making 20 psi of boost, of course you will need super unleaded