Anyone with an h22 boosted? working on my selection of pistons. I want 10-1 but they are custom with that compression to handle boost. My question is with a drop of 1 point of compression (10-1 TO 9-1) would I get driveablity problems with the stock ecu? I have to smog every year so under the table is cost prohibitive. Plus, it just requires the intake and ecu to be changed. I'm concerned the check engine light would come on.

 

it will run fine on 9:1 compression, given that you put everything else back to stock