how fast can a grand prix gt go without the speed limiter (top speed)

**Zainoman** · 01-30-2008

anyone know? im curious to see if ive hit it.....

**02BlueGT** · 01-30-2008

my guess would be in the 135-145 range, but only a guess

**scoobyydooooooo** · 01-30-2008

Had mine up to the max at 120,, but still went a tad faster

**SDGrandPrixGT23** · 01-30-2008

I was goin 125 at one point on Interstate 5, on a recent trip back from LA I was goin over 145 through Camp Pendleton....depends how your car is set up.

**UR LOSN** · 01-30-2008

in the GTP I was going 152...but it would still go mph...every mile or two....not much more after that when it was mainly stock.

I have had my GT up to 119.....doesnt really have much more

**gp2000gt** · 01-30-2008

144mph confirmed at the top of third for me... if the rev limiter was higher, it would've been higher, but I didn't want to shift into OD while going that fast. Only did it once though, as I really don't need to be hitting a tree, or much worse, another innocent driver.

**ryangtp89** · 01-30-2008

iev only hit 130 in my gtp soo far with my new pcm in it.

**SyntheticShield** · 01-30-2008

I hit 134mph chasing down a WS6 Firebird (I caught that sucker too and nearly got around him but we came up on traffic). I dont know if it would have went faster or not, it was within a month of me getting the GTP and before I had started modding.

**2Fast4U** · 01-30-2008

A friend of ours has had his Grand Prix up to 155. We had our old Grand Prix up to 134, and my 442 I had her up to 130. The Cutlass has been up to 143 with a different motor in it.

**SyntheticShield** · 01-30-2008

Originally Posted by 2Fast4U

A friend of ours has had his Grand Prix up to 155. We had our old Grand Prix up to 134, and my 442 I had her up to 130. The Cutlass has been up to 143 with a different motor in it.

Talk about a woman that moves fast, WOW!!!

**2Fast4U** · 01-30-2008

Originally Posted by SyntheticShield

Talk about a woman that moves fast, WOW!!!

That's right!!!!

I love driving fast my nickname in High School was Speedy cuz I drove fast

**GTP SE** · 01-30-2008

I was under the impression that the cars were gear limited to about 153ish.

**Trannyman95** · 01-30-2008

How do you figure that? What if your shift points are 6700? What about 4th gear? I have heard of guys going well over 165 though it takes a LONG stretch to get to! Our old 95/L67 car would shift into 4th at around 5500 rpm and that was in the 135ish range.

**Reidonly** · 01-30-2008

Highest I got mine up to was about 145mph I think. Stock 2.93's & 6300rpm shifts.

**archemedes** · 01-31-2008

just remember that if someone says they went 200mph in their gp they are lying, the vette had enough power, but not the aerodynamics to do it until recently

**FoSHO99** · 01-31-2008

I've never topped out my prix, to me it never seemed like that kind of car. My sho on the other hand made power up top and with the open intake and the secondaries opening up at 3400 rpm's it made it real fun. I think if I raced both of them together from 80mph+ the sho would win, but those kind of races get people killed and I'm not a fan.

**GTPluv** · 01-31-2008

My son asked how fast our GP would go one day. I slowed down at 120. Can't drive like that with the kids in the car! Unless we're runnin from the cops

**gonneville** · 02-01-2008

Originally Posted by FoSHO99

I've never topped out my prix, to me it never seemed like that kind of car. My sho on the other hand made power up top and with the open intake and the secondaries opening up at 3400 rpm's it made it real fun. I think if I raced both of them together from 80mph+ the sho would win, but those kind of races get people killed and I'm not a fan.

The SHO probably would win on absolute top speed, I had my 90 base model up to 127 once, confirmed by a buddy in his M3.
BTW, someone on BC did the math once, and I believe redline in OD would hit around 170 for 2.93s. Theoretically. Obviously drag would kill it long before then for a stocker...