Got the 181 pulley kit on this morning. Pretty easy install. Got a problem, the car is not pulling past 5200 rpm. It acts like the supercharger is disengaging at about 5200rpm. It will climb higher but slowly. It acts similar to when high IAT's cut the supercharger off. My IAT were fine (90 degrees) and I have a new pump. The car performs fine up until this rpm point. Pulls strong down low and I saw the boost peak much higher even with the 5k cutoff. Before pulley had saw only 14 psi, saw 18 psi on the way home even with it shutting off. What is going on? I will have the Jerrytune next week. I haven't read any post with this type of problem. Long term fuel trims are showing negative 3.5's. I might pull the battery cable off. Any suggestions?