I'm in the process of building a 427 BBC for my 69 Camaro. currently I'm stuck in machine shop jail, but soon here i will be needing pistons.
basic engine build:
512 block
l88 crank
7/16 rods
roller cam swap
Brodix rate rite heads
now originally i planned to use a piston that would put me at 11.4:1 compression with the open chamber head- the Icon 998 However the machine shop says my engine is currently 60 over, and will need to go to 70 over. I'm not concerned with the 70 over, im running one now without issue, however the piston i wanted is not available in 70 over, I actually called icon and they said there is "run" scheduled however that does not seem to be happening.
the next piston dome size would drop me down to 10.8:1, so technically a .6 drop. is that going to significantly effect anything? i did some searching and it seems like the "rule" is 7% drop for each point, so my math says if had a 500 hp big block, im talking 20 hp or less variance? is that correct?
basic engine build:
512 block
l88 crank
7/16 rods
roller cam swap
Brodix rate rite heads
now originally i planned to use a piston that would put me at 11.4:1 compression with the open chamber head- the Icon 998 However the machine shop says my engine is currently 60 over, and will need to go to 70 over. I'm not concerned with the 70 over, im running one now without issue, however the piston i wanted is not available in 70 over, I actually called icon and they said there is "run" scheduled however that does not seem to be happening.
the next piston dome size would drop me down to 10.8:1, so technically a .6 drop. is that going to significantly effect anything? i did some searching and it seems like the "rule" is 7% drop for each point, so my math says if had a 500 hp big block, im talking 20 hp or less variance? is that correct?
