Ok can someone give me a yea or no on running 12:1 on pump gas Without bad **** happening lol thanks

 

you will be fine on pumpgas 93 all day but if your spraying then thats a NO

 

Depending on your cam you could actually run that on mid grade. You need to focus on the dynamic compression ratio not the static. You only use static as a step to decide what cam to pick or vise versa.

 

a almost 100% on cc503 wit stock heads and flat top pistons Havent done any math might change pistons to achive 12:1 trying to keep pretty streetable

 

Is this pertaining to your magical 500whp project?

You need a much more solid understanding of compression ratio, both dynamic and static, what affects both, and overall how an engine makes its power. Your combo still won't meet your goals.