speed limiter?
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Launching!
Joined: Jun 2006
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speed limiter? i did a search but didn't find the info i am looking for. what is the speed limiter set at on a 1999 Z28 M6? i heard 160 but i want to be sure and i don't have a place to test it out right now. thank you.
12 Second Club
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From: Chitown-Jax NC-Jax FL-Honolulu-OKC, OK-NOW New Orleans Area
our cars are not speed limited but rev limited from what I have read. I did 172 on mine till it was winding out in 6th. food for thought
LS1 F-bodies have a rev limiter set to 6100 rpms, but that is seperate from the speed limter based on the rating ot the tires. Z-rated is limited in the ECM at 160 MPH, which is the highest MPH allowed with factory programming. I have changed these setting on my vehicles with HPTuners. 
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From: College Station/La Porte, TX
How do you know if your car came from the factory with z-rated tires? Is there a code on the door sticker? And if it didnt then what would the speed limiter be?
I know because my window sticker says it, I am the original owner of my car. If you are not, then you should be able to verify it on the door sticker (not sure though). If the vehicle does not have Z-Rated tires, it will have a 115-120 limiter. I have yet to see a non-Z-Rated car yet in my tuning ventures. I do know that trucks are limited to 98 MPH.
I think most of them are governed to 158. Thats about where my buddies Z tapped out at. I don't know what mine was, I had it programmed out before I ever broke 150.
And my truck stops at 100, so did my 2000 Z71 I had before. Stock GTP was 126
, till I replaced the PCM 
.
And my truck stops at 100, so did my 2000 Z71 I had before. Stock GTP was 126
, till I replaced the PCM . Trending Topics
Originally Posted by 12secSS
LS1 F-bodies have a rev limiter set to 6100 rpms, but that is seperate from the speed limter based on the rating ot the tires. Z-rated is limited in the ECM at 160 MPH, which is the highest MPH allowed with factory programming. I have changed these setting on my vehicles with HPTuners.
You guys should come to germany. Its nothing to see mercedes, audi, and bmw doing 250 kilometers on the autobahn. By the way thats right around 150mph. I know I do it all the time in rental cars.
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