id like to get my motor build on its way and the pistons are the only thing holding me up before going to lht to sleeve the block , i just like to know how i can tell what the compression of the pistons that i have are ? i know sounds crazy but i was under the impression they were higher then what they really are in other words i was lied to from the person i bought them from .

thanks in advance

justin

 

Most low compression pistons will be either a flat top or they will have a slight dish to them. If you post a picture of them I will be able to give you an idea.

 

 

They look like Wiseco pistons, With that done in 81mm I would say the compression will be around 10 to 1. 84mm they will be 11 to 1 +.
This is just a guess, either way I wouldn't re-use those rings and locks.

 

there stamped je 85mm underneth....

 

It's hard to tell, with them being 85mm I would say there close to 11 to 1 comp.

 

hmm.. so how do i tell exactly i would like to use them with the jrsc ?

 

I would contact JE and see if they can give you some exact specs on them. We only use CP Pistons so I can't get you any numbers on those.

 

oh ok ill get with je and find out .. were you driven down 49th st today in a red s2000 ?

 

ok i just called je directly and they confirmed its 11-1 so now the question is can i use these with the jrsc or is it to high ?