[charlie66]

Wow i forgot you have that 4.5 stroke .. So you're 505 at 8.92 to 1 .

I run 9 to 1 with a 3.75 stroke. Before that it was 10.2 to 1 .It worked ok at 20 psi or lower with out tuning issues . My cranking pressure was 190 psi. Now its 170 psi . But when i went above 20 especially over 28 psi i had gasket issues with the 10.2 to 1 . Later i did find out that the ethanol was only at 60% (e85 fuel) so that probably had alot to do with it but either way you look at it your tuning window gets much smaller when the base ratio is higher. The up side of it is you make more power per pound of boost. If you're not planing on going over 15psi i think it would work 9.2 to 1 with a .041 crush .

I thought you said you were using a .041 crush. Id use the .041 even though the ratio would be 9.2 to 1. Because the quench will still be in the so called safe zone. With a .060 you will be out of it being you;re .020 under deck .

I hope you dont mind me giving my opinion being you didnt ask me. I just wanted to share my personal experience with you ..