Pontiac GTO 2004-2006 The Modern Goat

Whats the real TOP speed???

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Old 05-06-2006, 05:31 PM
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Default Whats the real TOP speed???

I have seen plenty of videos of these cars hitting the 165 mph speed limiter but what is the actual top speed and what is the limiting factor? Gears, power, aerodynamics, drive shaft???

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Old 05-06-2006, 07:20 PM
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I would guess around 187 IMO.
Old 05-06-2006, 10:14 PM
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Burke's car has topped 200 with his STS turbocharged 455. That was when it smoked #7 piston due to blown head gasket.

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Old 05-06-2006, 11:06 PM
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HSV's with the LS2 run over 175 from the factory IIRC.

Top speed is all about bragging rights between guys, but in all honesty most people SHOULDNT take their car to that limit since things change drasticly as the car begins to drift at extreme speeds and the body tends to lift and you dont have control enough to even make a simple lane change without it being extremely unsafe. I tend to lay off the power around 145 to 150 at most. I know the car can continue to accelerate, but I have nothing to prove.
Old 05-06-2006, 11:29 PM
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not to mention the tire ratings, people tend to overlook these if they don't change tires for that reason, change their speed limit, and that can get very dangerous.
Old 05-07-2006, 12:35 AM
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Originally Posted by CrabhartLS1
not to mention the tire ratings, people tend to overlook these if they don't change tires for that reason, change their speed limit, and that can get very dangerous.
+1 I'd be afraid to go over 150 without seriously upgraded tires for just that reason.
Old 05-07-2006, 07:11 PM
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Originally Posted by CSiJason
HSV's with the LS2 run over 175 from the factory IIRC.

I tend to lay off the power around 145 to 150 at most.
150mph on a public road is nuts.
Old 05-08-2006, 09:25 PM
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ive gotten it upto 162 and the rubber piece that goes around our wind shiels lifted up and started slapping my roof and door glass < i took a shyt when that happend and cuised at 60 back home i felt like i was stopped going 60 lol yea i dont recamend going all that fast just to say i went 162 in my car and almost died lol
Old 05-08-2006, 10:18 PM
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Over here in Aus the Northern Territory doesn't have a speed limit in certain parts so what ever you feel is the go but just make sure your car is up to it ie tyres brakes etc etc coz a slip up at that speed means instant HISTORY, me well I have had mine up to 250+km/hr speedo stops at 250, 155mph so don't really know...
Old 05-09-2006, 07:19 AM
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Originally Posted by DrkPhx
150mph on a public road is nuts.
I do it all the time. Just need the right conditions.
Old 05-09-2006, 10:32 AM
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Originally Posted by CSiJason
HSV's with the LS2 run over 175 from the factory IIRC.

Top speed is all about bragging rights between guys, but in all honesty most people SHOULDNT take their car to that limit since things change drasticly as the car begins to drift at extreme speeds and the body tends to lift and you dont have control enough to even make a simple lane change without it being extremely unsafe. I tend to lay off the power around 145 to 150 at most. I know the car can continue to accelerate, but I have nothing to prove.

+1, wait till you have suspension upgrades, the stock suspension I would suspect is not safe at 160 mph plus.
Old 05-09-2006, 02:05 PM
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haha the ive had mine to 169, and frequently go 150, and its about as stable as my 68 camaro was at 140
Old 05-09-2006, 08:05 PM
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Topgear took a stock HSV GTO (Vauxhall VXR ? ) with the LS2 to 182mph.
Do a search for their online roadtests its in there somewhere.
Old 05-10-2006, 01:27 PM
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Originally Posted by Turbo04snake
+1, wait till you have suspension upgrades, the stock suspension I would suspect is not safe at 160 mph plus.
Only somewhat true. The car tends to lift at high speed, I feel it when I get to about 140. I'm sure it's safe to 160 but a good cross wind would easily toss you out of control at that speed.
Old 05-10-2006, 10:07 PM
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I wonder if the hoodscoops on the '05's make a difference, because my '04 doesn't feel like it's lifting at all at 150. It still feels solidly planted to the road.
Old 05-11-2006, 11:42 AM
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Originally Posted by gametech
I wonder if the hoodscoops on the '05's make a difference, because my '04 doesn't feel like it's lifting at all at 150. It still feels solidly planted to the road.
Old 05-11-2006, 11:48 AM
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163MPH here safely. Anything over 150 isnt worth it. Heck even 140 is plenty
Old 05-11-2006, 01:57 PM
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I am slow, only 140.



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