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FS: Mark VIII IRS Sub-Frame Bushing Kits

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  • FS: Mark VIII IRS Sub-Frame Bushing Kits

    Ford has discontinued the stock bushings for the IRS Sub-Frame.

    Also, from a performance perspective, the stock bushings allow too much movement of the sub-frame, which can lead to wheel hop and/or poor 60' times in high powered cars.

    I am developing performance bushings made from UHMW with hardcoated aluminum spacers.

    I expect the full kit of 8 bushings and 4 spacers to sell for $400 shipped (lower 48) at this point.

    I plan to begin shipments of the completed kits by mid-April.

    However, I am offering a $50 discount to early adopters who prepay in full prior to April 1st.

    See THIS post on SCCoA for more info.

    Please PM me for payment details if you are interested.
    sigpic
    98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
    98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

  • #2
    LOL, you're killing me Doug...

    Where do I sign up?

    Check your PMs.
    JP

    Comment


    • #3
      Originally posted by driller View Post
      LOL, you're killing me Doug...

      Where do I sign up?

      Check your PMs.
      Just doing my part to make the axiom "How fast do you want go $$?" true.

      PM answered.
      sigpic
      98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
      98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

      Comment


      • #4
        Here are some renderings of the bushing designs.

        The first two pics are of the upper, the second two are of the lower.
        Attached Files
        sigpic
        98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
        98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

        Comment


        • #5
          Will the hardcoated aluminum sleeves pass through both?
          JP

          Comment


          • #6
            Originally posted by driller View Post
            Will the hardcoated aluminum sleeves pass through both?
            There will be a single 1.5" diameter x 3.15" long hardcoated aluminum sleeve that will go through both bushings at each position. This sleeve will accept the stock M12x1.75x129.5 bolt (which BTW, are still available form Ford for $14.33 ea. p/n N805747S100).

            I am also going to provide a 1 1/2" diameter .050" thick stainless steel washer, to go between the top of the sleeve and the frame to prevent the end of the aluminum sleeve from being damaged by the irregular holes in the frame.

            The stock metal brackets/plates will be reused on the bottom of the bushing/sleeve stack.

            The attached pictures show the bushings (upper - lower) as they will be oriented in the car.

            Trust me, J.P., I've thought this one out.
            Attached Files
            Last edited by DLF; 03-17-2010, 08:38 PM.
            sigpic
            98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
            98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

            Comment


            • #7
              Originally posted by DLF View Post
              Trust me, J.P., I've thought this one out.
              Oh I trust you, no doubt you have this thought through. I was just confused by your calling the aluminum piece a "spacer". In my mind that would be called a "sleeve".
              JP

              Comment


              • #8
                Originally posted by driller View Post
                Oh I trust you, no doubt you have this thought through. I was just confused by your calling the aluminum piece a "spacer". In my mind that would be called a "sleeve".
                You're right, my terminology is incorrect.
                sigpic
                98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
                98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

                Comment


                • #9
                  I received the aluminum bar stock for the spacers today, so the machining starts tomorrow.

                  Crap! Looks like I won't get the UHMW until the 25th.
                  Last edited by DLF; 03-18-2010, 08:20 PM.
                  sigpic
                  98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
                  98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

                  Comment


                  • #10
                    Revised Upper Bushing

                    Took some additional measurements today, and I won't need as severe a chamfer on the upper bushing as I originally thought.
                    Attached Files
                    Last edited by DLF; 03-18-2010, 08:28 PM.
                    sigpic
                    98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
                    98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

                    Comment


                    • #11
                      cool cool

                      Im watching this thread too. I wanted to do an upgrade when i put in new uppers and lowers in the front and new ones for the rear carrier pumkin ect, when i switch old rear end assembly over to the new car.
                      I have videos of the tires actualy moving forward with slicks on it even though the wheelhop never happened for me with all the other braces. Ive always thought there is alot to be gained to eliminate "twist up and flex" before the car launches with this project.
                      Jeff

                      Comment


                      • #12
                        Originally posted by Sierra3 View Post
                        Im watching this thread too. I wanted to do an upgrade when i put in new uppers and lowers in the front and new ones for the rear carrier pumkin ect, when i switch old rear end assembly over to the new car.
                        I have videos of the tires actualy moving forward with slicks on it even though the wheelhop never happened for me with all the other braces. Ive always thought there is alot to be gained to eliminate "twist up and flex" before the car launches with this project.
                        Delrin control arm bushings and these UHMW sub-frame bushings will make that all go away....
                        sigpic
                        98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
                        98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

                        Comment


                        • #13
                          Originally posted by Sierra3 View Post
                          Ive always thought there is alot to be gained to eliminate "twist up and flex" before the car launches with this project.
                          I have always thought the same.

                          Originally posted by DLF View Post
                          Delrin control arm bushings and these UHMW sub-frame bushings will make that all go away....
                          That's the plan!
                          JP

                          Comment


                          • #14
                            Machining the sleeves. Takes about 1/2 hour a piece to get them to this stage, and the diameters still need to be turned. Got another 8 to go in this batch, then they're off to be anodized.
                            Attached Files
                            sigpic
                            98 Toreador Red Mark VIII LSC - 13.217 @ 104.78
                            98 Laser Red/Black Cobra Coupe (T-56/IRS) - 12.483 @ 110.94

                            Comment


                            • #15
                              Looking good!
                              JP

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