I am having the same problem... my tuner said it has something to do with the blade not closing all the way. are you getting an enigine code? I am getting TPS voltage low
2004 GT
Vortech V2SQ 3.33 pulley
42lb injectors,focus fuel pump,90MM MAF
BBK 75MM TB and PLENUM
SCT tuned by Ed Clark 360HP/360TQ
no boost pipe yet.... :nonono:
ok guys if you are getting a centri supercharger gears are a must!!!