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We just got off the dyno with a 2004 Grand Prix GTP CompG. Mods included INTENSE Stage 3 CNC heads and blower cam. Blower was a stock fifth gen M90 with 3.0" supercharger pulley. INTENSE Stage 3 PCM was dialed in with +3 degrees of timing, tuned for 60 pound fuel injectors and 85 mm. LS1 MAF sensor.
Best pull was 322 WHP through the full exhaust, with 93 octane Shell gasoline (with no additives) in the tank! I would estimate that a good intercooler would permit the 2.6" pulley to be run on pump gas and produce ~ 340 WHP. With race fuel and more timing, 350 WHP should be achievable through the full exhaust system.
These are STD corrected numbers (actual was 333 WHP I think).
Congratulations to John Kuehner from Texas!
Best pull was 322 WHP through the full exhaust, with 93 octane Shell gasoline (with no additives) in the tank! I would estimate that a good intercooler would permit the 2.6" pulley to be run on pump gas and produce ~ 340 WHP. With race fuel and more timing, 350 WHP should be achievable through the full exhaust system.
These are STD corrected numbers (actual was 333 WHP I think).
Congratulations to John Kuehner from Texas!