i have one on also, i love the charger. spools very close to a 35 and 40, and once it hits you better keep your eyes on the road. even keeps my egts 1280 max. i have the surge but it is very easy to drive through or around. if you want to make a run, build boost slowly until 15 is reached, then begin to roll into the throttle and then floor it and the boost goes up so fast it pushes right through the rpm and psi that the surge occurs at, or you can just hit the od button twice and there isnt even an issue. it does seem that with the cooler air on the cooler nights here in md that the durge is very hard to make happen, must have something to do with the warmer less dense charge air, heavier air causing a tiny bit of lag on the charger keeping the surge away.