billydomain

I bought a 2001 Camaro Z28 3 months ago and I would like to
bypass the governer. If any one has done this before, could you tell me how to do this?

Dimoncutr

It's a speedlimter, pick up a Hypertech for your year . They cost about 350 new or get one on ebay for about 180. It can do wonders for your car if you use it right.

35thanniv.SS

You dont need to change that unless you are planning on going over 140

O1Z

You also need to get some Z rated tires. Only cars without Z rated tires from the factory have the speedlimiter so you don't kill yourself when your tires explode from going to fast.

Bart

chevy qc

140? that's not the two choices for limiters.

stik6shift98

cars equipped with....

zrated tires have a limiter of 155 mph
and cars without have a limiter at 118 mph

6spdpewterZ

Be REALLY REALLY carelull, do not unplug the cable, I messed up my friend's hypertech.

stik6shift98

oh ya never unplug it just superglue th econnection...jk lol

what he means is dont unplug it in the middle of something thinking that it will just stop progress....it can and will mess up the car and the programmer......BE CAREFUL

cdmelcher

The way I heard it was if any Z28/SS '98-'02 had Z rated tires there is NO rev limiter or governer AT ALL. If this is true seems to me there would be some "stamp" or VIN code to prove this. What if you bought the car used and the tires were replaced. In my case I bought mine with 36,000 miles and the Goodyear RSA "Z" rated tires were all but worn out, SO I figured that was my case. HOWEVER, a firend of mine insists I have a REV limiter cause it is an A4, regardless of Z rated tires. Considering I'm a ***** in that I have hit 115-120 and backed off from there I can't seem to muster the ***** to go faster then that on even open back roads.

JimMueller

Upgrade your tires to Z, W, or Y-rated. After that you have a few options:

1) If just on a dyno, disconnect the vehicle speed sensor from the tranny.
2) Use a tool like a HPP3 or Predator to change the value in your PCM.
3) Buy LS1-Edit ($550). You'll ned a laptop to run the software.
4) Buy another PCM pre-loaded with the code for a similiarly configured car which came with Z-rated tires
5) Coerce a GM tech to re-flash your current PCM
6) Buy mail-order tuning from a tuning vendor. You can get minor things like this changed for $75 with their tuner version of LS1-Edit.

I believe stik6shift98 is correct with regard to native speed limiters. However, all cars have a rev limiter. The size of the OEM tires might be on the driveside door panel. My OEM's were 235/55/16 non Z-rated. I'm not sure if there are any non-Z-rated tires wider than 235.

You don't have a speed limiter directly due to your transmission choice.

rotwiler

I took my 02 Z28 with the optional GCS tires in to dyno it and they had it up to 144 before they let off the gas. Guy said it reached maximum h.p, so was no need to take it beyond that.

z top

hey am i right in saying that all convertables and 6 cylinders were governed at 118, not that this has to much to do with this discussion but i thought i read this somewhere.

mbrownin

ALL LS-1's come with a speed limiter. Which transmission you have doesn't matter. If car came from factory with Z-rated tires, it is set at somewhere in the vicinity of 160-162. If no Z-rated tires, then it is 118.