OK, this thread got posted over in Clubgp.com's forums and I felt I needed to come over here and call bullshit on that GP owner. I'm not going to claim I know everything or some shit. But what he said is a bunch of crap. 92 Grand Prix SE? That car came with a 3.1L or a 3.4 engine. NATURALLY ASPIRATED. Stock that car ran 17-18 seconds in the 1/4 mile? Over at ClubGP there are roughly 5 cars that are running under 12 seconds in the 1/4 mile. All are pushing more than 425hp out of their engines that DID come stock with a supercharger. One has switched from S/C to a Turbo setup and is running 10.9s in the 1/4, others have modified their M90s, while others have even switched to larger Mp112 blowers. And most all of them have lightened their cars.
So yeah...
Ok, I'll post up my specs on my car.
1999 Grand Prix GT, naturally Aspirated.
3.8L V-6
Race weight of 3650
Mods during last track time was Open Cone Intake, 3" downpipe, 3" high flow cat, 2.5" to factory Y pipe. On 17" Enkeis and Race Gas.
Best run was 15.098 @91.18 MPH. Cut a 2.15 60 foot time.
Added mods to date, 1.85/1.80 rockers, PnP'd Throttle body, Thrasher CAI, U/D WaterPump Pulley, O/D Alt pulley. And a DHP PCM. My best guess for 1/4 times now is 14.6 on a good day.
came stock with 200hp and 200ft/lbs of torque. Figure i am at about 220-240 hp right now. No idea. Never Dynoed.
Take It For What It's Worth