150 top speed? - Pontiac GTO Forum
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post #1 of 15 (permalink) Old 09-25-2005, 09:15 PM Thread Starter
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150 top speed?

i think not! i had a fellow goater riding shot gun with a video camara. i said i will take him to 140 so he can see how it feels. well my right foot magical turn to lead and it went past 145, 150, 155, 161 and i had to let go i did not look down at the DIC but he got it on video and i was there and i saw the tack and it was only at 5500 rpm and it still had more to give. man what a machine. 2005gtols2 will put it on the fourm soon. who said it top out at 150 please. i also had a 04 mustang gt try to get some but was wasted and pulled over at the gas station and he ask me what you got in that thing

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post #2 of 15 (permalink) Old 09-25-2005, 09:41 PM
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Thanks for the info. When I recently did 155 my goal was to see if there really was a limiter at 156, 158 or whatever it's supposed to be. But unfortunately I had to slow down because I was coming up on traffic. Some say there is a limiter and some say there isn't. Like you, I guess I'm gonna have to find out on my own. If I hit 165 I guess the limiter myth will be killed. At least on my car it will.

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post #3 of 15 (permalink) Old 09-25-2005, 10:01 PM
 
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EEZ GOAT where in alabama do you live? I am in Millbrook
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post #4 of 15 (permalink) Old 09-25-2005, 10:01 PM
 
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i have an 05 A4,,,my limiter is at 159 (had digital speedo on) still had pull left...i believe i was in the range of 5000 rpm's
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post #5 of 15 (permalink) Old 09-25-2005, 10:04 PM
 
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The factory speed limiter is set to 155 MPH on a 2004 6-speed, or at least it was on mine.

Keep in mind that the "true" speed of the car is somewhat lower than the "speedo" speed, at least comparing my SLP-programmed Predator diagnostic data with the speedo reading it is.

Since I have nowhere safe on a highway to do 155 to test my speed limiter, and I wanted to see what it felt like when it would kick-in, I reprogrammed it to kick-in at 80 MPH. (SLP's Predator lets you drop it really low or set it up as high as 170, but there is no "OFF" setting [grumble] and I was afraid to try "0").

Instead of the car feeling like it just "runs out of power" or has a "restrictor plate" installed, it instead bucks VIOLENTLY when bouncing off the speed limiter. (I reset it back to stock after this).

So I think if you did hit the limiter, you'd feel it. Not a feeling I'd like at that speed.
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post #6 of 15 (permalink) Old 09-26-2005, 01:41 AM
 
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Quote:
Originally Posted by BigNick
The factory speed limiter is set to 155 MPH on a 2004 6-speed, or at least it was on mine.

Keep in mind that the "true" speed of the car is somewhat lower than the "speedo" speed, at least comparing my SLP-programmed Predator diagnostic data with the speedo reading it is.

Since I have nowhere safe on a highway to do 155 to test my speed limiter, and I wanted to see what it felt like when it would kick-in, I reprogrammed it to kick-in at 80 MPH. (SLP's Predator lets you drop it really low or set it up as high as 170, but there is no "OFF" setting [grumble] and I was afraid to try "0").

Instead of the car feeling like it just "runs out of power" or has a "restrictor plate" installed, it instead bucks VIOLENTLY when bouncing off the speed limiter. (I reset it back to stock after this).

So I think if you did hit the limiter, you'd feel it. Not a feeling I'd like at that speed.
The factory speed limiter is 162 MPH according to all the magizines I have read and my own to eyes . Hold it down and when you hit 162 it will shut down.And you'll feel it.
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post #7 of 15 (permalink) Old 09-26-2005, 01:47 AM
 
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Any idea what the top speed is (without governor) on an 2005 with a six speed?
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post #8 of 15 (permalink) Old 09-26-2005, 02:12 AM
 
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Quote:
Originally Posted by rippinbyu
Any idea what the top speed is (without governor) on an 2005 with a six speed?
W/O a governor you could go until you blow the motor but if I had to guess, they say the corvette goes over 177 MPH but if you ran that to the absolute max it would be 220 so I going to say 220+/- if you run it to the max and are on a somewhat flat surface.

Last edited by smkdu; 09-26-2005 at 02:16 AM.
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post #9 of 15 (permalink) Old 09-26-2005, 02:33 AM
 
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Quote:
Originally Posted by smkdu
W/O a governor you could go until you blow the motor but if I had to guess, they say the corvette goes over 177 MPH but if you ran that to the absolute max it would be 220 so I going to say 220+/- if you run it to the max and are on a somewhat flat surface.
Well that is theoretical... so if you were in a vacuum with a constant supply of air to the engine you could hit 220ish. But in reality, I can't imagine getting over 170 in a GTO... and with the shape of the GTO, I'll bet there is alot of lift up there. But from what I hear it is alot better than F-bodies. F-bodies have windows flexing out at over 150 I've heard. Aerodynamics are crazy.
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post #10 of 15 (permalink) Old 09-26-2005, 07:54 AM
 
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220mph with what gearing?
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