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Lizard-Racing
18th March 2003, 05:05
The time has come to build my engine, but I am not 100% sure about the compression ratio!



If I fit low compression (-1mm) forged pistons and use a 2mm headgasket I will only have reduced the CR to a fraction over 9:1! Is this too high? Will I be limited with boost pressure?





Simo if you are using two 2mm headgaskets your CR is just under 8.1:1, is this what you calculated?

Have I miss calculted?



P.S. I am presuming the standard head gasket thickness is 1.5mm.

trickyd
18th March 2003, 06:16
I think -1mm pistons and 2mm MLS Hgasket is what GMC reccomend