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Thread: IRS initial alignment

  1. #1
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    IRS initial alignment

    Where can I find how to do the initial alignment on my IRS?

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    Senior Member AJT '33's Avatar
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    Quote Originally Posted by 60's Kid View Post
    Where can I find how to do the initial alignment on my IRS?
    If your talking about the pumpkin then there is nothing to do. Unlike all the other setups the IRS pumpkin is fixed so the alignment is only for the drive shaft to the transmission.

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    Quote Originally Posted by AJT '33 View Post
    If your talking about the pumpkin then there is nothing to do. Unlike all the other setups the IRS pumpkin is fixed so the alignment is only for the drive shaft to the transmission.
    No I was thinking about the control and adjustment arms.

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    Senior Member FF33rod's Avatar
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    Page 104 of the manual? at least that's the page it's on in my digital copy....

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    Senior Member AJT '33's Avatar
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    Quote Originally Posted by FF33rod View Post
    Page 104 of the manual? at least that's the page it's on in my digital copy....
    For the alignment specs, agreed, page 104. I have for my car version 2S of the manual.

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    Senior Member FF33rod's Avatar
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    Thought I'd bump this thread as I was just searching for this topic - initial alignment of the IRS.
    So as was pointed out, page 104 has the suggested alignment spec. That's great when you get to an alignment shop or attempt the full blown at home approach. However, what I thought I would see is some lengths measurements on the arms as a starter point. Essentially, the rear equivalent of what the manual gives for the front suspension on page 31. Has anyone seen something similar?
    Thanks, Steve

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    Senior Member Fixit's Avatar
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    I'm building a Roadster with the IRS, so I don't know if anything will translate, but I made a "SWAG" (Scientific Wild Azz Guess) and threaded the various couplers to the middle of the travel and finger tightened the locknuts.

    A few weekends ago #9365 became a roller, and sitting on the ground it's a little wonky, but not too bad. (Didn't take a pic from the back...)
    Roller02.png
    John D. - Minneapolis 'Burbs

    1965 El Camino - LT-1, 4L60e, 4wh discs, SC&C susp.
    2013 F-150 Platinum - Twin Turbo 3.5
    2018 Mk4 Roadster w/ Coyote - #9365 - Build Thread Delivery 7/3/18, 1st Start 1/4/19, 1st Road Mile 5/5/19, Legal 6/18/19, In Paint 2/25/21, Done (?) 4/2021

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    Use a level for up and down and string for the front and back. Works for a lot of people, close for some driving.

  10. #9
    Senior Member FF33rod's Avatar
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    Quote Originally Posted by 1932 View Post
    Use a level for up and down and string for the front and back. Works for a lot of people, close for some driving.
    I guess you mean on the face of the wheel/tire. Cool, makes sense, thanks....

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