Thanks again everyone,the replys have been very helpful. One more question while on this subject if you will please.
Is there a certain cranking pressure that you guys try to stay close to? Say 190 psi or lower? And what would be to high of cranking pressure using race gas of 112 or so octane,240 psi or higher? I know some race engine builders seem to pay more attention to cranking pressure than a calculated dynamic compression ratio,but with a naturally aspirated engine on race fuel what would be considered safe cranking pressure?