ive gone 110 on the PA turnpike in central PA where there are not many cops but they use aircraft to catch speeders so i tried to keep my self controlled after that.

how fast will our comp let us go? 139?

i think 126ish with the stock PCM for a GTP.

and its like 108 for a GT

Bass140 your not serious?
70 you gotta be kidding

He isnt serious, no way he could never do 71 lmao

Well dude I have a friend and I sware to god he doesnt do one miles faster than the speed limit lol

When I drive with him its so funny.
We were at BK at like 11:50 am noones there and he puts hes blinker on to park. We just cracked up. He was like WHAT?

I only have an SE IDK if i could get to 100 haha
Top speed-90

yeah whats the top speed of those beastly 3.1's lol palsut ?? idk lol jkim just messen with everyone... lol

145 but backed off when I saw tailights up ahead, haven't tried that since. I believe she had room enough to keep climbing.

144, but here is video of 140:
http://www.grandprix.net/ubb/ultimatebb.php?ubb=get_topic;f=1;t=010796#000000

At 147 you may have been hitting the limits of the tires, but you also may have been hitting the limits of the car's stock design from a standpoint of aerodynamics. Though we have a air spoiler on the front and a spoiler on the back they seem to be more for show than for function.....ours were designed to top out at 125.......Not quite like an Audi or BMW which has a air dam that serves thus purpose on the engine guard underneath the car along with functional spoilers and was designed for 150mph + on the autobahn.

I believe aero top end is closer to 160 on the GP.

And what happens at that point?

The HP required to overcome the drag increases dramatically so much so that you need an exotic set up like twin turbo etc.

So, it's not like the car falls apart, it's just that you can't accelerate anymore?

exactly. The aero drag increases to a point that the power required to accellerate/maintain escelates at a much higher rate the the drag increase does.

Example (not real numbers just for ease of use and clarity)at say 150 mph on the GP the drag is say 3.0 and requires 300hp to maintain 150. Now increase the speed to 155 and the drag goes to 3.2 but the power required will climb from 300 to 350. The faster the GP gets the higher the drag and the rediculously more hp it takes to get there.

I remember an article MT did back in the early to mid 90s with 140mph club. The Mustang couldn't make the grade because aerodynamically it couldn't get there. It only made 140mph when the test crew removed the wipers and duct taped all the hood/fender seams and covered some holes. Only then would it break through the 140 without engine mods.