IRS vs. live axle weight diff.

Discussion in 'SVT Tech Forum' started by EXTRPR50, Sep 10, 2006.


  1. Uncle Meat

    Uncle Meat Banned

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    In that specific picture you are absolutely correct. :nice: However this is the only photo I have that shows the two setups side-by-side so someone can really get a feel for all the parts that make up a complete IRS. Please feel free to rip the IRS out of your '01 and then get a similarly equipped 8.8 and set them side by side for a better set of comparison pics. :D

    U.M.
  2. bditty50

    bditty50 New Member

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  3. Uncle Meat

    Uncle Meat Banned

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    I still think the IRS in the 03/04 Terminators weighs more than the IRS versions in previous years. The torque brace and half shafts were beefed up for the Terminators so I'm sure the weight difference is a little greater than what many think.

    U.M.
  4. Dan_Soprano

    Dan_Soprano Mustang Master

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    yes, the 03/04 IRS assembly is considerably heavier do to the reason you listed. not actually sure on how much though.....
  5. 01BLKSNK

    01BLKSNK New Member

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    According to 5.0 mustang & superfords the live axle is 66 lbs lighter.
  6. 98 Saleen Cobra

    98 Saleen Cobra New Member

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    Ok, well after reading all of this, now i'm curious about the terminators capabilities on a roadcourse with IRS.. If you get the whole MM setup, the ultimate grip in a box package, will it out perform a terminator with 8.8 and all MM stuff on it?? I'm just curious because I haven't seen or heard of a 04 cobra on a roadcourse with IRS that is all done up.. I know that you are a drag racer but, U.M any info that you may have would be greatly appreicated on this question..
  7. Uncle Meat

    Uncle Meat Banned

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    Well a properly modified IRS with all the aftermarket goodies compared to a properly modified 8.8 with all of the handling related upgrades is still going to weigh more. Plus there is driveline loss. Takes more power to turn the wheels on an IRS setup than on a straight axle. I would surmise that all other things being equal the straight axle would still have the edge. Keep in mind that the IRS is made up of more components and parts so there's a higher chance of failure compared to the straight axle. There's a reason why you don't see professional road racing Mustangs using the IRS for competition.

    U.M.
  8. 98 Saleen Cobra

    98 Saleen Cobra New Member

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    Well that definatly makes sense. Thank you for your knowledge on this. I really appriecate it.
  9. tomustang

    tomustang Psychotic Member Founding Member

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    From what I have archived, was in a mustang mag is:

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