Well I tried the Gator Back belts with my 3 inch pulley and got lots of belt slip at 4500 rpm and barely held 7-8 libs boost. I went back to the gates regular belt and now comfortably back at 12 lbs boost and of course my injectors are maxed. I guess the gator backs with less surface area results in less grip. Has any one encountered the same issue.

 

I have the exact opposite results with mine.....???

 

Yeah thats odd! I also went down one belt size by using a 72mm pulley as opposed to the 77mm. the tensioner is close to fully clocked. That might have made most of the difference.