i just finished boosting my ls. i still have stock injectors. if i dont floor the car at about a little less than half throttle it hits boost fine and revs up to 7 perfect. if i give it full throttle it goes into boost and at 5500 it starts to studder. i just let off cause i dont want to blow the engine. could it be that im leaning out???

 

sounds like it, have you gotten it tune yet?

what kind of turbo, psi? stock injectors doesn't provide enough fuel for boost.