LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Top Speed?

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Old Aug 12, 2008 | 11:41 AM
  #1  
lilchrisgangsta's Avatar
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From: Detroit, Michigan
Top Speed?

I have a 93' pretty much stock, with 2.73 gears. It has the A4 trans.
The other night I went to top out my car, and it did about 115 and then hit that cutoff.
My Speedo only goes to 115.
I've heard of these things going upwards of 150+ mph.
Just curious as to how I could make mine do that.
I think I saw somewhere about programming it.
Idk any help would be appreciated.
Old Aug 12, 2008 | 11:58 AM
  #2  
wrd1972's Avatar
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Custom tune to remove the speed limiter.
Old Aug 12, 2008 | 12:05 PM
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+1. Although I don't recommend it if you don't have tires to back it up...

Better yet just don't do it I've gotten way to many tickets for stupid ****...
Old Aug 12, 2008 | 12:08 PM
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lilchrisgangsta's Avatar
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i just got some brand new zr tires.
that shouldnt be a problem.
and you said something about a "custom tune"
Where could I go to do this?
Old Aug 12, 2008 | 12:18 PM
  #5  
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Unless you want to do it yourself you can get a mail order tune.

Fyi doing it yourself takes a lot of pc know how and understanding ecm/pcm's.

Mine was done at pcmforless.com but I have alot of the know how for tuning so I'm buying my setup next month to do my own work.
Old Aug 12, 2008 | 12:28 PM
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94 Camaro Z28's Avatar
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Your car probably didnt come with Z rated tires factory, so your car was limited to 110-115 for safety reasons.
Old Aug 12, 2008 | 12:33 PM
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lilchrisgangsta's Avatar
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oh yea i know!
they came factory with t rated tires
255/55
Old Aug 12, 2008 | 05:22 PM
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No 4th Gen left the factory with 255/55-16's. I think you'll find it had 235/55-16's.

Since you have a 93, your "tuning" options are limited. You have to have a new chip burned.
Old Aug 12, 2008 | 08:57 PM
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150mph - CAREFUL
Old Aug 12, 2008 | 11:37 PM
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When my VSS was disconnected I made 130. My friend was pasting me his Maxima. He could not keep up the pace so that's where I've been. That's with the Formula wearing GS-C's on all four corners. Man..those were some good tires.

Last edited by 1FstFormulaV8; Aug 12, 2008 at 11:40 PM.
Old Aug 13, 2008 | 02:45 AM
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red1984's Avatar
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Doing 150 mph on the streets is stupid. They make tracks for a reason. Too many people have been killed because of people try to see how fast their cars are. i wouldn't do it.
Old Aug 13, 2008 | 01:38 PM
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unless you have a lot of work done just pick up a used hypertech. sometimes they go for around $20 on ebay.
Old Aug 13, 2008 | 05:49 PM
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Originally Posted by BigBadBlack93Z
unless you have a lot of work done just pick up a used hypertech. sometimes they go for around $20 on ebay.
Hypertech does not make a hand-held for the 93, because the 93 ECM can not be flash programmed. It has a removable chip.
Old Aug 14, 2008 | 01:08 AM
  #14  
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Originally Posted by Injuneer
Hypertech does not make a hand-held for the 93, because the 93 ECM can not be flash programmed. It has a removable chip.
yep, i had a hypertech stage 2(make sure its the one that requires the thermostat upgrade because the base one didn't pull the limiter off) chip in my 93. it pulled the top speed limiter and thats about the only gain i noticed
Old Aug 14, 2008 | 03:36 PM
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I had a 1996 z28 6spd nothing but exhaust on it. speedo went to 150 and i pegged it, was side by side w/ a mustang who said he pegged his at 160. I was young and dumb that was a few years ago. it shut down at 135 in 6th gear but 5th gear didnt red line till 160ish marker :P



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