ok, this is a b16a motor with a fully built bottom end with je pistons. it pushes 155psi in all cylinders and has 2-3% leakdown in all cylinders. so this is a good running motor. my question is, what compression ratio do you think this is around? the pistons came from je and the box said they were for a GSR, i think it said something like 8.5-1 or so on the box (8-something, not sure). any opinions on this?

 

195psi is about 9.4 conp, so 155 is about 8

 

Poop.... I have 10.6:1 and run 180 in 3 cyl. and 140 in the no. 3 cyl