Here is a link to the pistons I am using. Part #142068. Why does it say 9.8 compression with 65cc head ( mine are 63cc ) and I am calculating 11.54:1 at .004 deck height? Am I doing something wrong?
Uncut 63cc ebrock's measure pretty consistantly at 64cc. I measured mine at that.
I hope everyone quoting their compression ratios have actually meaured their heads.
The cam is a big factor on compression tolarance. So when quoting compression and pump gas (w/octane #) you really need to know the cam you are running.