LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Top speed of the LT1 f-bods?

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Old 02-17-2007 | 04:23 PM
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157, A4, 3.42s

And I'll never go that fast EVER again
Old 02-17-2007 | 09:10 PM
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Never went past 130-ish yet. I have 96 SS, t-tops, M6, stock gears (should be 3.42?) and stock steel DS. Windows and tops were fine but, the vibrations were scary. Not sure if it was a bad alignment, tires unbalanced, Drive shaft, U-joints or a little of everything. I was expecting to see a wheel shoot off the car or something. I will probably attempt a 100+ again sometime after I get new tires, Alum DS w/ new U-joints, and 3.73's.

Does everybodys' F-bodies get the psycho vibrations over 120? I mean, I've been in an SRT-10, and a GTO over a 100MPH and it was like riding on a cushon of air compared to mine.
Old 02-17-2007 | 10:41 PM
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if the car came with Z rated tires from the factory the computer is set to something like 190MPH, if it didnt have teh Z rated tires there limited to 115 MPH, nothing a chip cant take care of.
Old 02-17-2007 | 10:50 PM
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Don't know if the primary cause is the driveshaft, but I would think thats probably the main cause of the vibrations. I never really got over 115 before getting the aluminum DS.
Old 02-17-2007 | 11:07 PM
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Originally Posted by hyperzone
Does everybodys' F-bodies get the psycho vibrations over 120? I mean, I've been in an SRT-10, and a GTO over a 100MPH and it was like riding on a cushon of air compared to mine.
That's the Drive Shaft..get an Aluminum one, and you will see a world of difference. I mentioned it in one of my other posts..I also have a balanced Engine with my setup, and that thing will hit 130's/140's like it's nothing. Anyone have a problem with it not wanting to shift into 4th at some of them high speeds, mine used to do it, and we tuned it to shift itself at 118mph, and it stays in 4th.
I don't know how you T-Top guys would trust your cars at them speeds, it gets wierd with them at over 130MPH. My hardtop does the same thing with the Windows though, they start to suck out at about 140. I crack them bout a 1/4 inch, and they don't have a problem. I am a little lower also with a Spring Kit, so that helps nicely for top speed runs.
Old 02-18-2007 | 07:35 AM
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Originally Posted by the_merv
That's the Drive Shaft..get an Aluminum one, and you will see a world of difference. I mentioned it in one of my other posts..I also have a balanced Engine with my setup, and that thing will hit 130's/140's like it's nothing. Anyone have a problem with it not wanting to shift into 4th at some of them high speeds, mine used to do it, and we tuned it to shift itself at 118mph, and it stays in 4th.
I don't know how you T-Top guys would trust your cars at them speeds, it gets wierd with them at over 130MPH. My hardtop does the same thing with the Windows though, they start to suck out at about 140. I crack them bout a 1/4 inch, and they don't have a problem. I am a little lower also with a Spring Kit, so that helps nicely for top speed runs.
thats wierd ive never noticed any ttop problems. car was just as steady at 140, I only stoped at 145 cause I didnt like the amount of lift i was getting. Ive never had my windows suck out either, sounds kinda odd. but after 120ish if you have your windows open or T's off you def want to make sure your floor mats are secured
Old 02-18-2007 | 07:37 AM
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Originally Posted by z_speedfreak
but after 120ish if you have your windows open or T's off you def want to make sure your floor mats are secured
Old 02-18-2007 | 08:15 AM
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Drop the suspension, then it starts handling real good at high speeds.
Old 02-18-2007 | 09:34 AM
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150 t-tops off, was as scary as **** tho.
Old 02-18-2007 | 10:56 AM
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I have had mine up to 155 96 a4 , man I'll tell you at that speed I noticed that things come up on you QUICK scary
Old 02-18-2007 | 12:10 PM
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I went 150+ stock with 2.73 a4, and did the same with 3.73, speed-0 just pegged out.
Old 02-18-2007 | 01:42 PM
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I've been 155+ with the top down......lol
Old 02-18-2007 | 08:15 PM
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i got mine up to 155+ with stock gears (3.42s) in my 1LE 6 speed... it seemed like she had more left in her and with the speedo buried i would have needed a cop to tell me how fast i was actually going.....

fortunately there were none around. i think you could get a bone stock 6 speed 1LE car up to about 160 before it quits...
Old 02-18-2007 | 08:43 PM
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Thats my issue, I don't feel like doing RPM speed calculations, I'm just going to wait til I have a GPS in the car or something, til then when I hit 150mph I quit within a few seconds. I've decided I won't go faster til I can get the number......
Old 02-18-2007 | 09:54 PM
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156 on gps




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