AFR 225's on 383
 

i have the chance to buy some used AFR 225's that have been milled to 59cc.
I have not bought my forged rotating assembly yet for the 383 but i was going to go with a -2cc piston. will my compression be to high? I have some guys saying it will be fine on pump gas and others that are saying race fuel only. I know my options are either a thicker head gasket or maybe -4cc pistons. What do you all think? Im going to run a custom grind cam so i dont know what size yet till i have everything bought. I just hope the best cam spec will be one that sounds like its sick and dieing with a cough. :) Also might see some N2o in the future.

I don't know what your compression height is but at 1.120 your CR with -2cc pistons would be around 12.2:1 and with -4cc'ers it would be 11.9:1 or so. I'd go with the -4 pistons, it gives you a little more safety margin. I fact, I'd go even less than that, but that's just me.

anyone else know a bit about this?

I have the 59 cc PRC heads, and on my build, after getting advice from TSP, I went with an -8cc wiseco piston set to keep compression safe for pump gas.

can you PM me your cam specs? any your track times of you have any!! :)