Quick question.

Assuming the following:

(92-96)
JDM H22A's CR is 10.6:1
USDM H22A* CR is 10:1

Am I correct so far ?

If so, I would think the only thing bumping the compression slightly on the JDM motor are slightly higher compression pistons? Or is there <U>anything</U> else? (Cam profiles maybe?)

Thanks!

Si


(To cut to the chase, I want to know if putting USDM pistons/rings in my H22A will bring compression back to 10:1)

 

anyone?

 

From what I have heard, you are correct. I believe that's how my H22 is setup (JDM H22 with USDM pistons so I'm at 10:1).