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Thread: Pin Drive knock off wheels?

  1. #1
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    Pin Drive knock off wheels?

    Looking to go pin drive for my wheels. Rumor has it that some states are outlawing the pin drive/knock off design. I'm in Mass. and was wondering if anyone out there knows anything about this.
    Thanks,
    RC

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    edwardb's Avatar
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    Can't help you with the legal side. But just in case you don't know, choosing to go pin drive affects more than just the wheels themselves. Because of the required adapters, the suspension width is different. For the front, requires pin drive specific suspension parts and assembly. For the rear, if you're looking at the newer style IRS, it's not even an option. Factory Five doesn't offer the current IRS in a pin drive width. Solid axle is still an option.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014.
    Build 2: Mk4 Roadster #7750. Sold 04/10/2017. #7750 Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. 03 of 20. 2015 crate Coyote, 2015 IRS. Legal 04/18/2017. #8674 Build Thread
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    Administrator David Hodgkins's Avatar
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    Quote Originally Posted by edwardb View Post
    Can't help you with the legal side. But just in case you don't know, choosing to go pin drive affects more than just the wheels themselves. Because of the required adapters, the suspension width is different. For the front, requires pin drive specific suspension parts and assembly. For the rear, if you're looking at the newer style IRS, it's not even an option. Factory Five doesn't offer the current IRS in a pin drive width. Solid axle is still an option.
    Just to add to Paul's statement, you CAN order a MKIV with the older style IRS.


    FFR 5369 Pin Drive, IRS, Trigos, Torsen, Wilwoods, FMS BOSS 302 "B" cam , Mass-flo. CA SB100 (SPCN) Registered
    Delivered 4/23/06. "Finished" 4/2012 (still not done!)


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    I will be using a shortened solid axle rear end.

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    David,

    If you were going to order a new car (not to be raced-street cruising only), would you get a solid axle, or the older style IRS? Any opinions on how hard it would be to source a old Tbird diff, etc?

    Ken

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    edwardb's Avatar
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    Quote Originally Posted by David Hodgkins View Post
    Just to add to Paul's statement, you CAN order a MKIV with the older style IRS.

    Did not know that! Given the improvements provided by the newer IRS, plus the parts availability, not sure there's a good reason to though. Unless you're dead set on pin drive.
    Build 1: Mk3 Roadster #5125. Sold 11/08/2014.
    Build 2: Mk4 Roadster #7750. Sold 04/10/2017. #7750 Build Thread
    Build 3: Mk4 Roadster 20th Anniversary #8674. 03 of 20. 2015 crate Coyote, 2015 IRS. Legal 04/18/2017. #8674 Build Thread
    Build 4: Gen 3 Type 65 Coupe #59. Gen 3 crate Coyote. Delivered 12/2/2017. #59 Coupe Build Thread

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    Administrator David Hodgkins's Avatar
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    Quote Originally Posted by edwardb View Post
    Did not know that! Given the improvements provided by the newer IRS, plus the parts availability, not sure there's a good reason to though. Unless you're dead set on pin drive.
    I talked to "my guy" at FFR and I'm told it's a special order item, but doable.

    Quote Originally Posted by Kennyr View Post
    David,

    If you were going to order a new car (not to be raced-street cruising only), would you get a solid axle, or the older style IRS? Any opinions on how hard it would be to source a old Tbird diff, etc?

    Ken
    Hi Ken,

    PERSONALLY, I'd go with the older style T-Bird diff all day long if my goal is pin-drive width and 15" rims. I run that on my MKIII with absolutely no regrets.

    I looked on ebay and it seems they are getting harder to source, but you only need one and I'd have it built with new gears and a Torsen LS anyway.


    FFR 5369 Pin Drive, IRS, Trigos, Torsen, Wilwoods, FMS BOSS 302 "B" cam , Mass-flo. CA SB100 (SPCN) Registered
    Delivered 4/23/06. "Finished" 4/2012 (still not done!)


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    "Any opinions on how hard it would be to source a old Tbird diff, etc?"

    In addition to David's comments, you should be able to find one with enough calls to a junkyard. Just be careful as some of the Thunderbirds came with a smaller (7.5"?) differential. And for what it's worth, I recently saw an aluminum-case differential of the right type for sale in the "For Sale - Parts" section for a very reasonable price, with a rebuilt factory limited slip. I also have an iron case unit for sale there, for not much more than my parts costs, rebuilt with a new Detroit true-trak limited slip, and there are two "open" aluminum units in my shop that I could also live without. Good luck!

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    Thanks for your response David. Since 15"s and pin drive wheels are about the only thing that I have decided on, I guess I have some thinking to do. I'm going to stop by the Factory 5 booth at Barrett Jackson tomorrow & talk to the guys....

  12. #10
    Administrator David Hodgkins's Avatar
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    Quote Originally Posted by Kennyr View Post
    Thanks for your response David. Since 15"s and pin drive wheels are about the only thing that I have decided on, I guess I have some thinking to do. I'm going to stop by the Factory 5 booth at Barrett Jackson tomorrow & talk to the guys....
    Tell my son Grant I said hello!

    FFR 5369 Pin Drive, IRS, Trigos, Torsen, Wilwoods, FMS BOSS 302 "B" cam , Mass-flo. CA SB100 (SPCN) Registered
    Delivered 4/23/06. "Finished" 4/2012 (still not done!)


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  14. #11
    Administrator David Hodgkins's Avatar
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    oh, and yes, I DO love that pin drive 15" look!:









    Last edited by David Hodgkins; 06-22-2018 at 05:41 PM.

    FFR 5369 Pin Drive, IRS, Trigos, Torsen, Wilwoods, FMS BOSS 302 "B" cam , Mass-flo. CA SB100 (SPCN) Registered
    Delivered 4/23/06. "Finished" 4/2012 (still not done!)


  15. #12
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    And a black plate too-very cool...

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