500hp 650tq Grand Prix GTP Videos

[deanh8]

On the dyno:
www.digitalhorsepowerinc.com/DynoVid_2ndGear_Kph.mpg

Highway Run less then 1/4 Throttle:

www.digitalhorsepowerinc.com/80to100QuarterThrottle.MPG



Mods :
- Cartuning Turbo kit ( w/ upgraded turbo, intercooler) @ 15PSI
- MOdified downpipe w/ electric cutout
- LT1 MAF
- 65 lb/hour injectors (42.5's won't fit as they hit fuel rail...)

Thats it.. Nothing Else..
- Stock Rockers
- Stock Exhaust Manifolds
- Stock Heads
- Stock Cam
- Stock Fuel Pump
- Stock Pistons, blah blah blah blah blah

[deanh8]

The car had more power in it but we chose safety over pushing the limits due to the fact I had to drive the car ~600 miles to make it back home. Because of this once we hit the goal of over 400WHP, we called it a day. When I get back local, we will dyno again and maybe go for broke. Without ANY internal work, we estimate ~490 WHP. This obviously would not be something you would try to attain on a daily basis but since you get a boost controller with the kit, it gives you the option of tuning it up for the street and strip.

As far as the power goes, it makes great power and is very stock appearing. You will hardly know the difference until you are spooling and your supercharger whine is now more of a whoooosh. Power response it very good. As far as daily driving goes, the car behaves nicely. THe 300 mile drive from toronto to detroit was no different than driving with a stock gtp the same difference.

As far as "daily driver" car has over 1200 miles in the last 4 days and average 20.8 MPG at an "average" speed of 75 mph on the highway on the way home. I made 3 stops for gas / snacks and was in a blizzard for about 35 miles. I had quite a few 100 MPH romps and a lot of 85 - 90 mph driving. With 3.29's I don't think thats half bad.

The car could use more tuning to trim it out, but like I said we hit over our goal and that was the # we wanted so we said forget it. I had to drive 4 hours and a snow storm was coming so I high tailed it out of there. If we had time and I had some more guts we could have made some more power without a sweat.

[pontiacgrl]

omg that needle on the dyno just went

[Your Admin]

thats freakin Tight reminds me of my nitrous Days

[pontiacgrl]

yea only thing that would make that memory complete is a big BOOM!!!

[Your Admin]

PontiacGrl said:

yea only thing that would make that memory complete is a big BOOM!!!

[deanh8]

PontiacGrl said:

yea only thing that would make that memory complete is a big BOOM!!!