Engine cut-out at 120mph

**drock608** · 10-16-2005, 03:22 PM

so my car is being extremely weird...if i am accelerating at WOT and hit 120 all of a sudden it feels as though i hit a rev limiter (car is tacking 4000). If anyone has any info about this please get back to me...its really bothering me not being able to go faster than that.

**Zboner** · 10-16-2005, 05:18 PM

ls1?

**mcamp001** · 10-16-2005, 05:41 PM

give us more info, my guess is the speed limiter is set to this. If your car didn't come with Z rated tires, that's the problem. All Z rate tire cars were set to 162

**mcamp001** · 10-16-2005, 05:41 PM

give us more info, my guess is the speed limiter is set to this. If your car didn't come with Z rated tires, that's the problem. All Z rate tire cars were set to 162

**drock608** · 10-16-2005, 06:50 PM

its a 1998 z28

**Zboner** · 10-16-2005, 06:59 PM

hum? i had my 98 z up to 150.

**SeVeReDiStOrTiOn** · 10-16-2005, 09:43 PM

how do you know if the car came with factory z rated tires...is there a rpo code for it?

**drock608** · 10-17-2005, 04:32 AM

If there is a limiter then how would i go about taking it off?

**Zboner** · 10-17-2005, 04:37 AM

get it tuned out.

**drock608** · 10-17-2005, 05:15 AM

how much does that run and should i take it to gm or a mechanic?

**Zboner** · 10-17-2005, 05:30 AM

whatever they charge you take it to a LS1 shop if there is one around you, at mine i can get that done and tune everything i want for 300 bucks.

**bww3588** · 10-17-2005, 01:33 PM

check the sticker inside the drivers door. where the size is between the size and the pressure you will see a speed rating.

**2001NBMZ28** · 10-17-2005, 02:28 PM

Yep, my car came w/2.73's and GSC tires, has Z rating on the door. There's also RPO codes for the tire ratings.

**drock608** · 10-18-2005, 07:34 AM

alright, so i checked and it said that it had T rated tires originally. Thats not Z and im guessing thats why it does this...Now just one more question, can someone refer me to a good ls1 guy in the orlando/tampa area. (does it matter if i go to an ls1 guy or can i just go to a mechanic?)

**Frosty** · 10-19-2005, 08:11 PM

Why bother going through the trouble and $$ just to have the speed limiter disabled?

**SeVeReDiStOrTiOn** · 10-20-2005, 09:14 AM

a handheld programmer should be able to remove the speed limiter...so you can do it yourself. I could be wrong though but if any of the handhelds can do it the predator handheld can

**INFERNO** · 10-21-2005, 01:19 PM

I live in st. pete and there is a dyno tuner in tampa I will get more info and if all you want to do is remove the rev limeter a hand held will do it.

**Zboner** · 10-21-2005, 03:44 PM

Originally Posted by INFERNO

I live in st. pete and there is a dyno tuner in tampa I will get more info and if all you want to do is remove the rev limeter a hand held will do it.

\

hey i was just down there in St pete this summer nice place. buddy has a house down there.