69 Speedo Calibration - NCRS Discussion Boards

69 Speedo Calibration

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  • George D.
    Very Frequent User
    • August 31, 2000
    • 225

    69 Speedo Calibration

    I had to replace the odometer gears and the magnetic speedo coupling. I have been advised to have the speedo calibrated. Is this really necessary and if so, who does this type of work?

    Thanks,
  • Chuck G.
    Extremely Frequent Poster
    • May 31, 1982
    • 2029

    #2
    Re: 69 Speedo Calibration

    Yes, you should have it calibrated. The amount of magnetism on the spinning discs effects your speedo reading. Any speedo shop should be able to do it. They turn the speedo at a known cable speed, which translates into a known MPH reading. They then "gauss/degauss" the spinning magnetic disks to achieve the correct reading. Been there, done that. Took mine to Corvette Specialties of Maryland. Chuck
    1963 Corvette Conv. 327/360 NCRS Top Flight
    2006 Corvette Conv. Velocity Yellow NCRS Top Flight
    1956 Chevy Sedan. 350/4 Speed Hot Rod

    Comment

    • Chuck G.
      Extremely Frequent Poster
      • May 31, 1982
      • 2029

      #3
      Re: 69 Speedo Calibration

      Yes, you should have it calibrated. The amount of magnetism on the spinning discs effects your speedo reading. Any speedo shop should be able to do it. They turn the speedo at a known cable speed, which translates into a known MPH reading. They then "gauss/degauss" the spinning magnetic disks to achieve the correct reading. Been there, done that. Took mine to Corvette Specialties of Maryland. Chuck
      1963 Corvette Conv. 327/360 NCRS Top Flight
      2006 Corvette Conv. Velocity Yellow NCRS Top Flight
      1956 Chevy Sedan. 350/4 Speed Hot Rod

      Comment

      • Jack H.
        Extremely Frequent Poster
        • April 1, 1990
        • 9906

        #4
        Re: 69 Speedo Calibration

        Most major metro areas have independent United Delco dealers and many are equipped with speedo service. Try your Yellow Pages.

        Comment

        • Jack H.
          Extremely Frequent Poster
          • April 1, 1990
          • 9906

          #5
          Re: 69 Speedo Calibration

          Most major metro areas have independent United Delco dealers and many are equipped with speedo service. Try your Yellow Pages.

          Comment

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