I just picked up a Rajay turbo for my current build and need some advise on a "J" model head...
My motor as it sits now is a 1075 n/a with nice 10.25:1 (ish) pistons and a stock kz head.
For the turbo I would like to drop the compression some and have been looking at pistons, then I read that a J head would drop the compression a couple points if installed with regular kz pistons...
My thought is that with a J head I would not only drop compression, but also gain some flow...with proper APE conversion of course...
Problem is that I am not sure about the compression drop and if the J head would be to much for a street 1075 turbo...Also, I have read but am not sure that some of the J model heads drop compression (like the GPZ1100)...do they all have larger combustion chambers than an early kz head?
