Ive got 3j shafts with quiafe atb, running around 330hp about same torque. When i built it i read that turbo applications are less aggressive on initial start of movement as they sort of start to rotate then come in when boost builds, whereas na is boot full dump clutch? But to me thats driving style? But anyway, i do launch it, not always, sometimes and ive no problem, have 195 tyres