I recently bough a y8 vtec head and i want to swap it onto my y7 block but i was told that compression was going to be bump up to around 9.9:1...what do i have to do to keep the same compression ratio of a regular d16y8(ex) of9.6:1... and i wanna boost so i dunno what compression pistons to get? thanks

 

use a thicker hg if you want to lwer comp. i boosted the **** out of my old y7/y8 combo with headstuds. 15 psi on a t25. sold it, then dude ran a 75 shot on it and then he sold it and its getting turboed again

 

Dam...did u ever take it to the track...ive been wanting to know some track times on a similar set up...so thats it...just thicker head gasket...bottom end of the y7 block is the same of the y8 just the vtec head and thicker HG...