I dunno, say I'm 9 to 1 alum heads. 10 LBS? I know there are tons of variables, I'm just wondering what would be the limit of boost for something like I've got? Pump gas wise, For me that's 91 octaine. I'm kinda thinkin I only need 1 turbo, like 10 lbs. of boost?? I'm one lost mofo,.. seriously.