F1R?

I have a small blk chev 421 AFR 227 heads with 9:1 comp single plane intake with turbo 400 and 373 gears. what do u guys think for a procharger? Its just a weeked cruser. I am thinking about 15 pounds of boost with intercooler and 91 gas is the best we have around here.

We recommend all pump gas applications to be between 8-8.5:1 compression. Now there are plenty of guys out there doing it with a little more compression. We just wouldn't recommend it. Usually we would like to see an air to water cooler or air to air with meth injection on something like that. HTH
Kim
SMRE