I did 30% over injectors in mine a couple months ago. I have no tuning, and it will smoke a little right off the bottom before the turbo spools. I couldnt tell you if it will hurt anything because I dont really know. but mines seems to be running pretty good still! i have an intake and a boost valve as well. And with 33x13.5s mine will walk on my dads stock lb7 with stock tires.
2002 GMC LB7 Duramax
ARP head studs
Suncoast tranny rebuild kit with suncoast triple disk
Last edited by Crapmonstank; 12-03-2012 at 03:52 PM.