Thursday, September 2, 2010

Good turbo compression numbers.

So I'm still planning on using Eagle 6.25 inch long, small journal Chevy rods part number CRS6250SLW, Pistons I was planning on using are Icon IC723 but after more research I found Icon IC731 which are for a 350 chevy with 6in rods.
I also tracked down the actual specs of a Fel-pro head gasket #1015-1.
It is .039 inch compressed and 4.100 inch bore. I found the specs on Jeg's website. So using the Engine Compression Calculator which takes into account the gasket thickness and bore........
 using the specs:   
bore 4.03
stroke 3.00
head gasket bore 4.10
head gasket thickness .039
combustion chamber 45.6
piston dome/dish cc -18.6
deck clearance 0.11
I got a compression ratio at approximately 7.55:1, and if I did any chamber work on the head that number will only go down. Of course I will have to cc the head and the block with pistons in it to be absolutely sure of my numbers.