Top Speed for '04 GTO - Pontiac GTO Forum
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post #1 of 37 (permalink) Old 01-01-2005, 11:14 AM Thread Starter
 
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Top Speed for '04 GTO

Just wanted to clear up something that is the topic of a lot of posts... The top speed on the '04 GTO is 160mph. Last night the speed limiter was kicking in at exactly 160mph, it felt like I had just hit a ton of bricks when it kicked in, and it doesn't take long to bounce right back to 160!

Now, just need to find a way to take off the limiter and find the true potential!
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post #2 of 37 (permalink) Old 01-01-2005, 11:29 AM
 
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Man thats fast! I wonder how fast it would do after the limiter is gone?
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post #3 of 37 (permalink) Old 01-01-2005, 02:59 PM
 
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Are you sure it is a speed limiter? People used to think that the Z28s had a limiter but it was only the cars that were not delivered with Z-rated tires from the factory (115 mph). It turned out that the "limiter" was the electronic ignition turning off because the engine had reached red-line in 5th gear (172 mph). The Z28 would not pull 6th gear at that speed. A couple of military guys stationed in Germany figured this out on the Autobahn. The GTO is geared a bit lower than the Camaros LS1s so this may be what is happening in your case.

I wouldn't encourage anyone to test this out on the GTO. Beware, at 120+ it takes forever to stop and the '04 GTO's brakes aren't its strongest suit.

Last edited by Xman; 01-01-2005 at 03:02 PM.
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post #4 of 37 (permalink) Old 01-01-2005, 04:08 PM
 
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How many R's were you turning?
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post #5 of 37 (permalink) Old 01-01-2005, 04:37 PM
 
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ohhh top speed run
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post #6 of 37 (permalink) Old 01-02-2005, 03:11 AM
 
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what happens if...

if a cop catches you going 160mph will he likely put you in jail and take your car away? maybe even charge you with some kind of felony?

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post #7 of 37 (permalink) Old 01-02-2005, 03:48 AM
 
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I thought there was a 160 governor on our cars. The guy that got rid of my skip shift said he would raise it to 255 when I bring the car in for tuning.
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post #8 of 37 (permalink) Old 01-02-2005, 05:21 PM
 
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Quote:
Originally Posted by Whiteshadow
Just wanted to clear up something that is the topic of a lot of posts... The top speed on the '04 GTO is 160mph. Last night the speed limiter was kicking in at exactly 160mph, it felt like I had just hit a ton of bricks when it kicked in, and it doesn't take long to bounce right back to 160!

Now, just need to find a way to take off the limiter and find the true potential!
how meny R's were u turnin at 160?

Last edited by carguy; 01-02-2005 at 05:23 PM.
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post #9 of 37 (permalink) Old 01-02-2005, 10:47 PM
 
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I checked it coming home today. 160 is redline in 5th. No I did not go that fast but 2,000 rpm is 53, 4,000 is 106, thus 6,000 is 160. I haven't read anywhere or in any report that the GTO has a speed limiter. I think this most likely is the electronic ignition turning off at redline.
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post #10 of 37 (permalink) Old 01-03-2005, 12:04 AM
 
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You be a crazy man! What if a tire blew or a deer ran out? I've been up to 132 in my vette and I saw God.
You be a crazy man-don't do that again!
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