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Correct tacho for R3

Home Forums TR3OC Members Forum Correct tacho for R3

This topic contains 2 replies, has 2 voices, and was last updated by  David McLean 3 weeks, 6 days ago.

  • Author
    Posts
  • #8820

    David McLean
    Participant

    What is the correct ratio tacho to be fitted to a 1971 A75? The tacho fitted to my machine is a Smiths black faced one (RSM-3003/14A) but the ratio is 3:1 on the face dial and as far as I can see from the bit of info that is around the ratio should be 4:1. I think the counter is reading under as a result.

  • #8824
    Stephen Lee
    Stephen Lee
    Participant

    David

    My 1971 A75 has a 4:1 ratio (RSM-3003/13A)

     

    Steve

    • #8825

      David McLean
      Participant

      Steve,

      Thanks for the info. Looks like I will have to get a 4:1 tach.

      Dave

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