Ok, help me out here. I have the GM stage 2 and would like to know the smallest pulley size that I can run with the kit injectors and gm tune. Just looking to keep the warrenty and not get to radical. So if any of you have done this kind of mod let me know what size you have gone to and how your performance was affected. Thanks.

 

From what I've heard 2.8 is the smallest you want to go before maxing the injectors (i've read a lot of arguments over this so I'm not claiming anything, but a lot of people claim it depends on where you live i.e. sea level etc.), and 2.9 is (of course) the safer way out. I have a 2.8 on the way so I'll see how mine turns out. If it blows up just swap the stage 2 pulley on and then send it in

 

2.8 is the smallest I have seen run on a S2, but it would still make me nervous because I haven't seen what the duty cycle is like with that size..