Quote Originally Posted by speedminded
Then use a b16/b18c5 head slightly milled or a thinner head gasket or a taller piston and have way more than 10.6:1...the GS-R head sucks, sure it's a higher compression but its smaller valves and does not breath as well.

But doesnt the p72 head have the flat edges on on the combustion chamber which reduced risk of detonation?