ET limit on IRS suspension

Discussion in 'SVT Forum' started by 54life, Feb 11, 2004.

  1. 54life New Member

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    does anyone know how fast i can run on my IRS suspension before I have to do a solid axle swap? I should be breaking high 12's here soon once i swap my gears out.....I am putting on a procharger d1sc in about 6 months which should put me at low 11's or even high 10's with drag radials. When should i expect my halfshafts to say goodbye? Thanks
    54life, Feb 11, 2004
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  2. xenon New Member

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    xenon, Feb 11, 2004
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  3. Uncle Meat Banned

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    There are a few guys running low 10's with the 6-speed and the IRS. May need to upgrade the half shafts and the T-56 input shaft if you want to run those numbers all the time though....
    Uncle Meat, Feb 11, 2004
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  4. 54life New Member

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    t56 input shaft??? On a t45???? Thanks for the website and the info. I plan on staying in the 10's and keeping my IRS (I personally love it)
    54life, Feb 11, 2004
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  5. djtech Founding Member

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    Walsh Motorsports has a White 99 Cobra coupe with a stock IRS running in the 9's

    :nice:
    djtech, Feb 11, 2004
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  6. Predator03 New Member

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    Selling 03 Cobra IRS cheap

    IRS has 3k miles with everything except brakes.
    03 Cobra
    I want 1200.00, maybe 1000.00.
    If interested call my cell at 956-342-2900
    Or email me at jmjett01@yahoo.com

    Leave a message at anytime. :nice:
    Predator03, Feb 11, 2004
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  7. Uncle Meat Banned

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    Sorry 54life! I was thinking you had an '03!

    Well you do have basically the same rear end though. The '03 did come with beefier GKN halfshafts and a thicker IRS brace compared to the pervious year. I would assume you need the same upgrades as we do. Halfshafts and some sort of better rear end girdle. I'll tell you a little secret... MJChip from Zone-5 Performance Products is almost ready to release a much needed differential cover girdle for the Cobra IRS. It's being tested by a half-dozen hard core guys right now. If you want to learn more you can read about it here: http://www.modularfords.com/forums/showthread.php?t=8298

    Get you one of those and a set of after market Half shafts and you'll be damn near bulletproof. (Just have to worry about the stub shafts after that!)

    U.M.
    Uncle Meat, Feb 11, 2004
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  8. 99CobraJMS Founding Member

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    I will be doing a solid axle swap in the next few months, I will sell you my GKN Stage IIIs from my current 99 setup. So when you break those stockers give me a PM. I also got two stock 1/2 shafts for my 99 that I plan to sell with the IRS setup on ebay. I feel the GKNs are worth a premium so I will sell them alone.

    John
    99CobraJMS, Feb 11, 2004
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  9. 54life New Member

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    thanks unclemeat...man you know everything...I appreciate all your help man
    54life, Feb 12, 2004
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