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  • Speedometer Recalibratin

    So my next S14 is gonna be a Canyon Carver/Touge Runner and I'm gonna be using a 4.364 FD so I know the Speedometer is gonna be off.
    Which of these two wires would I splice (28 or 35) to calibrate the Speedometer. I'll be using the Dakota Digital SGI-5. Also will this affect ABS operation?

    Diagram:

  • #2
    WAT.

    Pull the speedo out of the cluster. Find the set of solder jumpers on the back. Jumper #6, which is a 6.3% change. 4.363 is a 6.8% change, which is close enough. If 6 is already jumpered, open it and jumper #7. I did this in my S14 and it's dead nuts on with a 4.363. Was speeding doing 64 on the speedo. Cop says, "this is a ticket for 64mph". Proven! haha

    Here's some pretty pics:
    http://forums2.freshalloy.com/showthread.php?t=124389
    She's built like a Steakhouse, but she handles like a Bistro.

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    • #3
      Crap totally forgot about that, thought that only applied to the JDM Clusters. So in addition to the 6.5% from the FD I'm going to be using 235/40/18 Tires which are 2% taller then the stock size. to I would need to add a total oh 4.5% correct?

      I feel special for forgetting about that lol

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      • #4
        Verification?

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        • #5
          sounds about right to me.

          Do you have a GPS, or can borrow one?
          fix it at 4.5% and then take the GPS for a drive on some straight highway where you can set the cruise. I doubt there's much of that in Hawaii, but I'm sure you can figure something out.

          check the speedo vs the gps's reading and adjust from there.
          Originally posted by SoSideways
          I don't care what color they are as long as they are LONG AND HARD.
          '04 G35 Sedan 6MT- The DD
          '96 240SX- The Track Toy

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          • #6
            I would just buy a GPS and not care about the stock speedo anymore...
            Cory B.

            "Driving a race car as fast as possible is all about maintaining the highest possible acceleration level in the appropriate direction."
            http://www.youtube.com/user/nissanfanatic240

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            • #7
              Originally posted by Cory View Post
              I would just buy a GPS and not care about the stock speedo anymore...
              X2

              I use a GPS in my S13 because my HUD stopped working...
              GPS is accurate and digital!

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              • #8
                Originally posted by KA240SX808 View Post
                Crap totally forgot about that, thought that only applied to the JDM Clusters. So in addition to the 6.5% from the FD I'm going to be using 235/40/18 Tires which are 2% taller then the stock size. to I would need to add a total oh 4.5% correct?

                I feel special for forgetting about that lol
                This is correct. Just add up the jumpers on the back of your speedo as per the link, then add 4.5% more to it.
                She's built like a Steakhouse, but she handles like a Bistro.

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                • #9
                  Originally posted by Cory View Post
                  I would just buy a GPS and not care about the stock speedo anymore...
                  I never thought of that but great idea. I'll use a friends GPS to set my speedometer correctly after installing my Dakota unit.
                  Jim Schumacher
                  My 240

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                  • #10
                    I wired my dakota digital unit directly into the back of the cluster. Mine is probably a bit different than what you guys are doing since I'm using a much different signal from the t56 in my car.



                    The wires in the pic above are:
                    red wire is 12v to power the unit
                    black is ground
                    green is speed signal coming from ls1 vss
                    yellow/red stripe is output going to the cluster.

                    Its mounted under the passengers side air bag cover. Its real easy to calibrate, just push the "up" or "dn" button.

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