boost and compression question

[mustangrfast88]

ok i been thinking about putting a supercharger on my car with this new motor and i am looking at a 11.5 to 1 or 12.0 to 1 compression ratio and dont know if i can put a charger on it or what i should do for a power adder thanks any questions ask

[zmcnutt]

glad you asked this question im somehwat in the same predicament

[ibstrokin]

Ideally you will want around 9:1, if you want to run pump gas. You can buy heads with larger combustion chambers, take your heads to a machine shop and have the combustion chamber opened up, run thicker head gaskets, put in different pistons, etc to achieve a lower comp ratio. You could also run e85. As always there are a lot of variables, how much boost, what's the intent of the car etc.

[Rich]

I agree with Brian, with aluminum heads generally anything under 10 to 1, with moderate boost is safe.

I'll be around 10.8 to 1 with 8 to 10 lbs someday!

[mustangrfast88]

street strip car and was only looking at 9 pounds of boost

[Jeff88coupe]

I'd try to get the compression down to at least 10.5:1 if you want to run 9psi....definatly if you want to run it on 93 pump gas. I'd really look at running E85.