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

Top Speed Limiter

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Old 01-11-2003, 11:52 AM
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Top Speed Limiter

Whats the top speed limiter on a 97Z Automatic
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Old 01-11-2003, 12:08 PM
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I always thought the Z wasnt electronically limmited so its gear limited (from what i have seen) to around 155 mph.
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Old 01-11-2003, 12:14 PM
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Fuel is cut off at 108[some say 115]mph...
[not sure what he means in above post?]
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Old 01-11-2003, 12:18 PM
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i really dont think the fuel is cut off at 108, my 94 has seen speeds of 150
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Old 01-11-2003, 12:20 PM
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It depends on the car. If you have a 150mph speedometer, the car is not electronically limited. If you have a 110mph speedometer, it is limited to ~110 mph.
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Old 01-11-2003, 12:26 PM
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I've gone to about 125...
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Old 01-11-2003, 01:12 PM
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If the car came with Z rated [for speed] tires there is no 'speed limiter' at 108...
If it didn't the fuel is cut off at about that speed[ can be 'programmed out']
Gears really have nothing to do with top speed... [ it's all about HP...]
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Old 01-11-2003, 01:16 PM
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the fastest ive touched was about 145 more like 142 but still, plenty fast! What gears would I have if im at 2k at 60mph
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Old 01-11-2003, 01:31 PM
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If your car is like my 97 Z, it might have 273's.I was told if you have 2 D OD on the shifter section you have 273's. If you have 1 2 D OD you have 323's. I know when I changed my gears it had 273's in it. hope this helps.
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Old 01-11-2003, 01:44 PM
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If the car came with Z rated [for speed] tires there is no 'speed limiter' at 108...

Exactly. Most will make it to 160ish before they just don't have enough oomph to go any higher in stock form.
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Old 01-11-2003, 06:09 PM
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Where can I order more oomph? I thought I was gonna need heads, cam, blower, nitrous, etc.

Oh, yeah, that is OOMPH!

My 94Z had a 106-108mph limiter but the Hypertech power programmer III took care of that though I think the PC based tuning software is a better value.
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Old 01-21-2003, 07:53 PM
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My automatic shift go's 1 2 d OD N R and when im at 60 im at 2k so i have 3.23?
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Old 01-21-2003, 08:38 PM
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Yes, you're car should have come from the factory with 3.23 gears. You can't rely on your tachometer for accuracy, most stock tach's read a couple hundred RPM high.
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Old 01-22-2003, 07:37 AM
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Arrow

Go to this web site to find about your 4th generation.
http://www.tcnet.net/~dstorer/jf/
just click on your year.
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Old 01-22-2003, 07:58 AM
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speed limit

i would liketo know how to get mine where it doesnt shut down at 110 becuse i hate these little rice burners passing me after i shut down how can i get rid of that the cheapest way i want it gone so bad
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