Green5pt0

Im looking at Edelbrock Performer's with 1.90 intake and 1.60 exhaust with 58cc chambers. Im wondering what kind of a differance the 58cc's will make over the 60cc's. How much should that increase compression, and will I have any spark plug-to-piston clearance problems? Any input is greatly appreciated.

fats429

not with a stock cam , you will be fine . 1/2 point increase in compression . with stock pistons 9.5:1 with 58cc chambers thats means 89 octain depending on timming but 87 is out