383 s/c compression questions. - Third Generation F-Body Message Boards

kowboy59 · 02-23-2008, 01:32 AM

Okay I got a 350 block that im going to fully rebuild and do the works to it lower end wise. Itll be a 383 hsr. That is pretty much all i got going right now. When the motor gets completed, ill be running it like that until i can save up for a s/c What I want to know is what should a ideal compression ratio is for a 383? I want it to be as high as possible for the fact i aint going to be running boost on it as soon as it is done.

Gunner823 · 02-26-2008, 11:07 AM

All depends on how fast you want it to be when you boost it.
Make sure you have a good quench, that will help keep detonation down when you boost. Beyond that, I'd stay somewhere in the 8.5-9 range, with a 383 you'll get plenty of torque even with that compression, and it should be safe to run 6-8 psi when you're ready.

kowboy59 · 02-26-2008, 02:08 PM

Okay I was thinking of maybe staying with the 350 just rebuildin it to a 355 and blowing the piss out of it., Can you tell me if i run bigger injectors than what i need, is that bad? I have a megasquirt so it would control how much fuel.