looking for 8.5:1 compression with a 81.5mm bore for a b18c1. tried cp and arias already cant find them there. any suggestions?

 

hmm.?? u know i am not sure if they do make that low of a ratio..but i do know this. u can get 81.5 9:1 and then get the 5 layer cometic head gasket. that will really drop your ratio to 8:5. i have 84mm 9:1 je piston and with that gasket im at 8:5.

 

Yeah, you can also deshroud your valves to increase head cc which will lower CR a bit also.

 

JE will make those, im pretty sure my friend is that compression