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  • SBC V-8 swap question

    I am having trouble with a SBC V-8 and a 5 speed Getrag. The throw on the throwout bearing is just over a 1/2" more than what a stock throw is using a V-8 Archie and a Centerforce Clutch. I called V-8 Archie today and he thinks its due to me using an aftermarket throwout bearing, to replace it with a GM Delco bearing?
    I am in Lowell, Indiana<br />Building an 88 Fiero GT with a 93 STS Northstar and 5 speed Getrag. <br />Custom Mr. Mikes interior, Norms fiberglass nose and custom paint.

  • #2
    Re: SBC V-8 swap question

    I'm having the same problem

    Comment


    • #3
      Re: SBC V-8 swap question

      We need to help each other here, its driving me nuts, I am going to have time early next week to play with this some more I will let you know what I find out.
      I am in Lowell, Indiana<br />Building an 88 Fiero GT with a 93 STS Northstar and 5 speed Getrag. <br />Custom Mr. Mikes interior, Norms fiberglass nose and custom paint.

      Comment


      • #4
        Re: SBC V-8 swap question

        When you say is has a 1/2" more throw that tells me there is no way the Fiero slave will travel far enough to disengage the pressure place. Make sure of a few things first.
        Put a line on the master pushrod (under the dash) and measure the travel from top to bottom. Do not measure the free movement at the top.
        Do the same thing at the slave. They should be equal.
        If it is not, it is most likely air in the system or a bent pedal.
        If it is and all you need is that extra 1/2" travel to make it work you could try some custom work.
        On my car I moved the slave cylinder lower and redesigned the release bearing lever so the slave push rod contacts it about 3/4" lower, closer to the pivot point. This changes the leverage (not a problem, just harder to push slightly) and increases the throw on the lever.
        Let me know

        Jim
        http://jimdinner.wordpress.com/

        Comment


        • #5
          Re: SBC V-8 swap question

          After putting a heaver clutch in one of my cars, my old Aluminum peddle twisted and I had to replace it with a steel one. After that it worked fine. There was a recall done on the Aluminum
          Clutch peddles..... Maybe this will help.

          Comment


          • #6
            Re: SBC V-8 swap question

            Originally posted by KitCarGuy
            After putting a heaver clutch in one of my cars, my old Aluminum peddle twisted and I had to replace it with a steel one.† After that it worked fine.† There was a recall done on the Aluminum
            Clutch peddles..... Maybe this will help.
            I have already bought the new steel peddle from the Fiero store it is not the peddle new slave cylinder and rod I'm thinking of making a longer one to see if it will work. ??? ???

            Comment


            • #7
              Re: SBC V-8 swap question

              Making a longer slave pushrod will do nothing unless you make it so long that the clutch is partly disengaged.
              Do you have freeplay at the pedal? Pull up on it too.
              If make a longer master pushrod, this will make a bit of a difference. If you bend your pedal or change the pushrod location on your pedal this will make a big difference too.
              http://jimdinner.wordpress.com/

              Comment


              • #8
                Re: SBC V-8 swap question

                Its not even in the car, I marked the throw on the housing betfore it was pulled apart. The problem is tat the throw out bearing goes to far down its shaft and it just about falls off it before it would be engaging.
                I am in Lowell, Indiana<br />Building an 88 Fiero GT with a 93 STS Northstar and 5 speed Getrag. <br />Custom Mr. Mikes interior, Norms fiberglass nose and custom paint.

                Comment


                • #9
                  Re: SBC V-8 swap question

                  Sounds to me your engine spacer is too thick. The release bearing and transmission are too far away from the flywheel.
                  Is this a possibility?
                  Perhaps you should space your flywheel closer to the transmission.
                  This is going to take some detailed measuring to find this problem.
                  http://jimdinner.wordpress.com/

                  Comment


                  • #10
                    Re: SBC V-8 swap question

                    Originally posted by jdinner
                    Sounds to me your engine spacer is too thick. The release bearing and transmission are too far away from the flywheel.
                    Is this a possibility?
                    Perhaps you should space your flywheel closer to the transmission.
                    This is going to take some detailed measuring to find this problem.
                    If he is as I the adapter came from V8 Archie and is the same thickness as all the others out there working.

                    Comment


                    • #11
                      Re: SBC V-8 swap question

                      I am just guessing without knowing all the facts. A flywheel has to be certain depth into the bell housing in order for it to work. By using an adapter plate you have changed that depth by whatever the adapter plate thickness is. Does an Archie kit space the flywheel out at all?
                      http://jimdinner.wordpress.com/

                      Comment


                      • #12
                        Re: SBC V-8 swap question

                        Originally posted by jdinner
                        I am just guessing without knowing all the facts. A flywheel has to be certain depth into the bell housing in order for it to work. By using an adapter plate you have changed that depth by whatever the adapter plate thickness is. Does an Archie kit space the flywheel out at all?†
                        I donít know it comes with a flywheel made for the kit maybe it is thicker ??? That part of mine worked fine my problem is the arm is not moving far enough to engage the clutch it stops and there is more room for the pedal to move once you touch the pedal it starts moving there is no play then it moves about an inch and stops ???

                        Comment


                        • #13
                          Re: SBC V-8 swap question

                          I am not following your description. Does the pedal not move freely through the entire stroke? Is the release bearing binding up?
                          Some people say 'to engage the clutch' means you are pushing the pedal down, other say engaging the clutch means you are raising the pedal. Lets call it pedal UP and pedal DOWN.
                          From your description is sounds like the release bearing is binding on the collar, perhaps your pedal is going down too far. Try a block under it to test it. ???
                          http://jimdinner.wordpress.com/

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                          • #14
                            Re: SBC V-8 swap question

                            The motor and the trans is not in the car, I have the stock location marked on the out case where the it started from to where it was fully engaged. Now its moving an additional 1/2" more and the bearing is about to far off the shaft when its engaging the clutch. There is no pedal.
                            I am in Lowell, Indiana<br />Building an 88 Fiero GT with a 93 STS Northstar and 5 speed Getrag. <br />Custom Mr. Mikes interior, Norms fiberglass nose and custom paint.

                            Comment


                            • #15
                              Re: SBC V-8 swap question

                              When you push the peddle down the arm going in the tranny starts to move no play after the arm going to the tranny moves about one inch it stops and the peddle will continue to go to the floor a couple of more inches; hope that helps.

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