hello, i have afr cylinder heads with 54cc chambers and i recently bought a ati procharger.i plan to run between 5-12 lbs of non intercooled boost.i found a set of blower pistons that are 8.88 to 1 with 58cc heads.what would this make my compression?i have a 355 complete forged bottom end.Will a blower work with such a small chamber?

 

54 would put those pistons at 9.2-1, with no other changes. That is fine for a blower.
You could also do what I did and do a little chamber work to unshroud the valves and polish the chambers, which will also increase the size by 1 or 2 cc's.
If the pistons are down the bore some, that will also lower your compression.

Mine worked out to be right at 9-1, I am currently running at 16.5 psi on 93 octane thru a pair of small intercoolers; IAT's are 150 deg. at the end of the run.

You should be fine, with the proper fuel and timing.

 

thanks for the reply anyone have any other suggestions or imput?

 

My heads are 52cc, no defects noted.
Only means you need a big dish in the pistons to get the CR you need.

im running 9.1:1...makin awsome power

 

I have afr 190 heads with 54cc chambers. I ran up to 9 psi with a 2 core on 350ci. It ran fine. Now I went to 28cc JE piston in a 383ci. Running 12 psi on 9.5_1 compression with a D1. Deck is @ 0.010". I will probably go to 64cc heads for 15psi.

 

Here is an example of CR.

http://web.camaross.com/forums/showt...0&page=1&pp=15