I have a 98 m6 z28. I raced a buddy the other night goin down a hill. Im not sure how fast i was goin, prob 155+. Im just watchin the road at this point, all of a sudden she starts jumpin like shes bouncin off rev-limiter. WTF!!! Is there a speed limiter on my year of something??

 

Anybody????

 

Yes there is a Speed Governor on all of our cars. The limit was dependand on what tires the car came with from the factory. I can't remember the details but I think it was if you had Z rated tires from the factory the governor was set to 165mph and if the car came with I hink it was H rated tires the governor was set to 135mph or so.

 

I changed mine a while back and I think it was set at 155 from the factory.

 

i the car and driver issue where they test the 98 Z28 with an M6, and the top speed on that one was 159 i belive. so i'm guessing the limiter was set at 160

 

take off the governers chip and you should get anohter 15mph or so

 

My stock file had a limiter at 160.

 

Mine is 115

 

What do you guys think the tops speed of a stock ls1 is without the speed limiter, and what about with a cutout and lid?

 

It is actually 162 on the Z rated cars.

 

159-163 on cars with the good tires (Z rated).

These F cars will do around 175 with factory gearing and the limiter disabled.

They aren't the most aerodynamic cars, and with factory suspension, it's pretty sketchy.

The factory struts are junk, and at those speeds it feels like you're floating.

 

117mph w/ 235/55-16, 162mph w/245/50-16 tires.

 

The sticker in the door of my 01 Z shows it came with T rated tires from the factory which means that it'll only go about 116-118....I think as far as the sticker in the door jamb for the LS1 cars it'll either be T or Z rating.

 

I don't know where some of you guys are getting those speeds, Every f-car I've owned ran out of steam at @154-157 stock.

Is your car a 6-speed? I think its more likely that while you were watching the road, you actually did hit the rev-limiter in 5th.

 

162 and they will run every bit of it. Independant testing in Austrailia showed with a stock car and the governer removed a top speed of 173mph.

 

i do belive its 167mph. did it come with z rated tires from the factory?

 

The limiter will kick in @ 159-163 MPH. I've had mine at the limiter, and back up to or three times consecutively.

And NO not the rev limiter. If you are hitting the rev limiter in 5th gear, you have gears. Because it can't be done on a bone stock factory car.

I'm well above of the 155MPH mark on the cluster, and the limiter is still in place at the moment.

 

Man, I am so confused. I know my car didn't have z rated tires, but it will still pull up over 150. I haven't had it above 155, but according to what is being said here, I shouldn't be able to do that. Again, I'm confused.

 

it'll be printed on the sticker on the driver's side door. if it doesn't say Z in the recommended tire size then it shouldn't go to 150. if it does, then someone has probably tuned the computer, or atleast had the speed limiter done away with.