What the Heck for HP & 1/4 mile Time.

[95GTS]

For starters you need to get rid of the 160* thermostat and at least run a 180*. With it that cold the car will never warm up and the computer will keep it in "open loop" which it'll run rich all the time which will reduce performance. Second if it's got a 2000 motor in it then the stock hp is 260 at the flywheel. Using roughly a 15% drivetrain loss with the 5speed that's 221 hp at the wheels. So if it's dyno-ing at 245 at the wheels then the fwhp is about 289 hp. That's just about right for pullies and exhaust add ons (+29 hp). And you say you've got 3.73s. It could be a number of things why your car is a bit slower. What's your elevation at the track? That plays a big difference. As well as weather, traction, and especially driver. Driver is a huge factor.