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Top Speed

This is a discussion on Top Speed within the LT1 forums, part of the Vehicle Specific category; I know a stock LS1 can top out at 163 in the M6. Curious what can the LT1 top out ...

  1. #1
    Rice Killa JwMonE99's Avatar
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    Black With T-Tops
    96 Z28 M6

    Top Speed

    I know a stock LS1 can top out at 163 in the M6.
    Curious what can the LT1 top out at in an M6?

  2. #2
    LTX N20LT4's Avatar
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    The fastest "legit" time i've ever came across was a top speed of 157-mph in an 1996 Z28 M6, tested by M/T.

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    Rice Killa JwMonE99's Avatar
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    Black With T-Tops
    96 Z28 M6

    What do you mean by legit?

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    LTX N20LT4's Avatar
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    Quote Originally Posted by JwMonE99 View Post
    What do you mean by legit?
    Information from a legitimate source.

  5. #5
    Pathelogical Liar BlackLT1Z28's Avatar
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    94 Camaro Z28

    That sounds about right. I think the estimated top-speed from a source I cannot remember put it at 159mph.

  6. #6
    what about top speed for an a4?

  7. #7
    http://www.f-body.org/gears/

    honestly it comes down to tire pressure, weight, windows up, altitude and wind direction/speed when you start talking triple digit plus.

  8. #8
    M6 King Hot Black Trans-Am's Avatar
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    2001 Trans-Am 13 F-XT

    As fast as it can go, but try it down hill with a tail wind for best results.

  9. #9
    LTX N20LT4's Avatar
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    Quote Originally Posted by ichliebecamaro View Post
    what about top speed for an a4?
    Motor Trend, 152mph in an LT1 Z28.

  10. #10
    you should be able to hit 155 in 5th in an lt1... 167 i thinkis the fastest ive seen on a stocker in 6th, just not enough room anywhere to let the horsies push faster... but techincally i think 6th at stock redline is like 216mph or something rediculous lol

  11. #11
    Formula Driver! 96Firebirdformula's Avatar
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    Batman Black
    1996 Formula

    What is governor set at for ZR rated tires 155-160mph? mine came 245/50/ZR16's factory option

    standard equipment is 235/55/R16 and governors set low

  12. #12
    Member jasonisdn's Avatar
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    i pegged it. on the interstate with 5 guys in it, yes 1 little guy was setting on the hump. coming back from a titty bar, at 3am. so give or take how much the factory speed-o is off and how far the peg is below 150.

  13. #13
    Moderator Firebirdjones's Avatar
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    I was riding with a buddy a few years ago in his 96 Z28 convertable with an automatic trans. It's a bone stocker with stock tune, speed limiter and all,,,,and when he hit 155 mph it started cutting out. Which I believe is typical with the speed limiter.

    I checked the speed limiter on my 02 SS camaro convertable that is also an automatic and it was also set at 155 mph in the stock tune. My 6 speed LT1 also has a factory speed limiter setting of 155 mph. Guess they are all capable whether auto or manual. But I have no desire to try.

  14. #14
    That guy thearborbarber's Avatar
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    158 mph by GPS with a 1994 Z-28 A4 with 3.42 rear end. I was limited by drag.

  15. #15
    Supercharged Raptor285's Avatar
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    These are all about right, I've heard of bolt-on ones doing 160+, they just take a bit longer to get there than the LS1's

    A friend of mine had his (later my) auto Z28 reading over 140 on the speedo and still pulling, it had 3.73's and was not corrected though, so I would guess 130ish...

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