98 camaro speed limiter???

[98 z-two-8]

I recently bought a 98 z28 with the 6 speed. It seems that the car doesn't want to go any faster than 115 on the dot. In 4th gear its running at about 5700 rpm and it feels like im hitting a rev limiter I shift into 5th and 6th and run into the same thing. I havent read anywhere about a speed limiter but i dont think that there is anything wrong with the car???? Help please I have been greatly disappointed that i an only go 115.

[Injuneer]

What tires are on your car? If you don't have "Z-rated" tires, you have a speed limiter, with the limit defined by the limit of your tires.

[98 z-two-8]

Computer issue??

Is this a computer issue or and how can it be resolved?

[Mr Nice Guy]

Well.....

I have the same problem. It's a built in speed limiter. It can be fixed with a reprogram though. HPP, LS1 Edit, etc...

[z06transam]

the rev limiter on the f body is at 6300 rpm i had my 99 T / A going 130 easily i dont know what would be wrong w/ yours but they do well over that

[hotwhip9]

I have a 98 Z with an auto and i got mine up to 146 and ran outta road, atleast thats what the speedometer said. So i am assuming it must have been modified before i bought it and if so, how could i find out what was done before i bought it?

[legaleye]

Z top speed

I had a 2000 Z with a 6 speed and just checked the dealer brochure.... standard tires are not Z rated and there is a comment in the fine print under the tire specs that say top speed may be limited due to tire limitations, see dealer for details. I have never seen a Z delivered with other than the Z rated tires, but since they were an option (base tired I think are H rated), its quite possible the car you acquired originally had the base tire combo, so it has a speed limiter in the computer. Computer change or reprogramming should fix that.

Anecdotally, since I wasnt there, it is reported that a few Camaros delivered to a state police had the "wrong" tires and thus a 108 MPH speed limiter a few years back. They were returned to GM to get the right parts on them. Also, the Michigan State Police runs a testthan the Z rated tires, but since they were an option (base tired I think are H rated), its quite possible the car you acquired originally had the base tire combo, so it has a speed limiter in the computer. Computer change or reprogramming should fix that.

Anecdotally, since I wasnt there, it is reported that a few Camaros delivered to a state police had the "wrong" tires and thus a 108 MPH speed limiter a few years back. They were returned to GM to get the right parts on them. Also, the Michigan State Police runs a test of police package cars each year and the LS-1 camaros they tested generally topped out at 159 (1999 model) and 160 (2000 model). The police camaro is a Z in RS trim.

Howard

[98 z-two-8]

thanks

thats exactly what i needed to know thanks for the help

[00 Ragtop Z]

I also have a 2000 Z-28 that was delivered with other than Z-rated tires. When I talked to the local tire dealer about a flat I had, he was shocked that it didn't come with z-rated tires. Gonna be upgrading soon to 17" wheels and 245/50/17 tires so will solve the problem then. May need to do something about the rev limiter on mine though too