Blaker_2010

Is a tune the only way I can get around this, or is there a cheaper way?

Car bucks at 118ish...

Any help would be much appreciated

LS-ONE_DAY

No properly running V8 (LT or LS) should be bucking at 118mph. Do you have a V6? If you have a V8 something is probably broken or needs replaced. Mine doesn't buck, it get a little floaty around 135mph, but it would smoothly reach 155.

Blaker_2010

Uh oh.....
No, it's a 99 z28 Ls1 (bone stock)

Paul Bell

iTrader: (9)

What speedometer does it have?

Blaker_2010

Its the original one, did they have different ones for 99?
If you can tell me what to look for I can run and look at it

Blaker_2010

This really has me kinda worried now, I hope it's something that won't be too hard to pin point

Arctic2002ss

Why do people have to answer when they don't know the answer???

If the car came with non Z rated tires, the speed limiter is indeed set at 118mph. It has to be tuned to change it. I think a handheld tuner can change it but I'm not sure. A person/shop with tuning software can change it for you. With Z rated tires, the speed limiter is set at 162mph.

dodson55

iTrader: (18)

if its a 6 speed unhook the speedo and no more limiter if you wanting to do it cheap lol if its a auto no choice but to tune it to get rid of it

LS-ONE_DAY

Pardon me, from now on the whole board will wait for you to revel us in all your knowledge

Seriously though, I was unaware that Z28's came with 235's as the basic option until I found a post that broke it down.
So while you are probably correct in this case, no need to be a dick about it

LS-ONE_DAY

For further reading on your issue OP, a similar thread was started a month ago I just found

https://ls1tech.com/forums/pontiac-f...d-limiter.html

Paul Bell

iTrader: (9)

Blaker, you need to tell us the max speed on your speedo. 150 or 120 MPH.

Blaker_2010

It is 150 and yes it came with 235/55 16's

jimmyblue

iTrader: (11)

It's a trivial change for somebody with the tools, and you
could probably make a better deal than a full tune if that
is all you want. Not that it's all you -should- want.

Blaker_2010

Ok, kinda lost me there jimmy blue