That's actually the speed the limiter kicks in at for the SS/WS6.
I remember car and driver testing the convertible models and the SS pulled to 160, but the WS6 pulled right to the limiter (so the top speed was most likely higher).

I could see the GTO being 170. The lower gearing would actually help the engine pull a little harder and closer to redline (the f-bodies could not pull to redline in 6th gear stock). Plus it doesn't have any tack on scoops to slow it down.

Chris

 

Gto can go 176.....
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If you drop it off a cliff. =) but seriously, who drives that fast anyway

 

Exceptional point.

After seeing what it actually takes to bury the speedometer on a public highway, I'd say noone!

It takes a couple of miles of clear, straight, smooth road. At that speed, a radar detector is completly useless (at 160 mph you are going a quarter mile every 5.5 seconds!), and having any cars on the road when you do this is completely assinine (some drivers can't pay attention to you passing at 50 mph, let alone 150+ mph)!!

I've only had my 97 Z over 140 twice since I've owned it, and both was done on a desserted Arizona interstate in broad daylight. I simply can't see trying anything like this on any public road under any other conditions.

 

I was in my friends 2000 WS6 and we hit the speed limiter...I think that his HyperTech said 166 was the limiter, but it could have been 163.

 

Honestly, who cares what the car's speed limit is, I said dropping ot off a cliff in a joke, guinm put it into perspective, I bet most people here would crap their pants at those speeds, at a track, sure, but where are you going to SAFELY take the car up to upwards of 150mph?!?!?!?!?! at night it is out of question, and better hope there is no one else on the road,

 

where do you take a car to go that fast? Why the salt flats!!

Wow, I didnt know the cD on the GTO? Wow, thats low. With scoops, its .4! (just guessing) but it will have ram air so that will add like 60-90hp......

I have seen many an fbody video, and I have seen many cars reach that speed on roads. And did anyone see that busa that hit over 220mph? He was pulling a wheelie till about 160... I would figure with ***** that big, it would be hard to ride a bike?

 

that haybussa had messed up gears.

hell, then if we go by speedo, my speedo says that everyone on nj turnpike drives 100.

3.73 gears without recalibration box on 3.23 =)

 

I believe that top speed in F-bodies can only be achieved in 5th gear. When you upshift into 6th from redline at 5th, the car actually slows down.

 

Now, isn't rolling resistance affected by the weight? The greater the pressure exerted by the wheels, the greater the rolling resistance?

 

Yes, you're right. But same idea that the engine can't pull 6th gear enough b/c it's so low .

Chris

 

isn't top speed for 04 gto unmodified 155mph.

 

i didnt know you posted on here too al.

 

Thats one variable acting on another.

Keeping all else constant, weight doesnt factor in the equation.

Top speed is simply a cancellation of forces. Aerodynamic drag vs torque at the wheels. When they match, acceleration reaches zero. Same theory as terminal velocity, only gravitational force is the accelerating force.

 

signed up for this board. I heard this is the most active 5th gen site anywhere outside of GMI and C&G. And everyone here (for the most part) is fbody minded. Its a different perspective then LS2's comments.

 

different........uh yea i guess.