2004 Grand Prix GTP CompG does 366 WHP!

This vehicle is a 2004 Grand Prix GTP CompG equipped with INTENSE? Stage 3 CNC heads, INTENSE? Stage 3 Blower Cam, INTENSE L32 Intercooler Kit, INTENSE? Stage 3 PCM, and other supportive modifications. The blower was a stock fifth generation M90 with 2.60" supercharger pulley. The INTENSE? Stage 3 PCM was dialed in for 60 pound fuel injectors and an 85 mm. SLP LS1 MAF sensor.

The 348.0 WHP was done with a 3.00" supercharger pulley. We changed to a 2.80" for 358.9 WHP, and 2.60" for 366.3 WHP. The torque drop in the last run wasn't as it appeared. For that run, we asked the dyno operator to not mash the gas pedal quite so hard. This helped reduce the initial wheel spin, but dropped the reported torque number slightly.

These are STD corrected numbers.

Congratulations to Robert Silva from Illinois!

2004 Grand Prix GTP CompG does 322 WHP on pump gas with no intercooler!

This vehicle is a 2004 Grand Prix GTP CompG equipped with INTENSE? Stage 3 CNC heads, INTENSE? Stage 3 Blower Cam, INTENSE? Stage 3 PCM, and other supportive modifications. The blower was a stock fifth generation M90 with 3.00" supercharger pulley. The INTENSE? Stage 3 PCM was dialed in for 60 pound fuel injectors and an 85 mm. SLP LS1 MAF sensor.

The best pull was 322 WHP on pump gas, through the full exhaust, with 93 octane Shell gasoline in the tank! We 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 horsepower was 333 WHP!

Congratulations to John Kuehner from Texas!






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