I posted on the Duramaxforum but i know knowledge here is more up my alley in this subject matter..Any of you guys running larger chargers experiencing any of this? If i do a WOT pass in my truck once it either locks the converter or shift i get this "Pfft" from under the hood/ not quite a chirping sound. Im trying to convince myself its a small burst of turbo surge with the stg2r 68mm but im not seeing any more boost with this charger then i did with the 3794, granted i have 100 over injectors now. 3794 never did this that i recall. Boost pressure is 35-40psi at the Y bridge when this occurs. It sucks trying to diagnose these things because WOT issues arent something you can pop the hood and have a buddy listen for!