Does anyone know what the compression on an 8.5/1 piston should approximitly be on each cylinder? Or what someones compression is on each cylinder on there set up? What does a leak down test consist of? Any help would be great. Thanks, Rich

 

Probably around 145-150 psi for 8.5:1

 

roughly 150psi with 8.5:1 with no more than 14psi variance between cylinders. On a fresh motor, that was properly assembled, the variance should be minimal.

 

Thanks you guys.