What compression ratio with pump gas?
What's the highest compression ratio you can run on pump gas (i.e. 93 octane)? With the pistons I have on my 347 I can get 10.9:1 with a 58cc combustion chamber, 10:3:1 with 61cc and 9.9:1 with 66cc.
I was going to go with an AFR 185 61cc head but can I go with the 58cc head and still run pump gas?
1966 Mustang GT Coupe Restomod
2002 Acura RSX Type-S (STOCK)