Quote:
Interesting solution. So if I drive 50 based on my phone GPS, and my truck speedo says 60 . . . Then I should multiply 60 X 2 and would get 120? Or should I multiply the error of 10mph X 2? That seems more logical since 10 X 2 = 20 and the MPH is 20% off. Then I’d need to order a speedo reduction adapter for 20%.[/quote]
Yes, need to slow down the cable rotation by 20%. If you think in terms of 100 MPH being 120 MPH indicated it make it simpler for the math but harder to get away with the road test!
Ratio adapter needs to be 1: 0.80
Last edited by BC59; 06/12/2021 10:05 PM. Reason: Can't type
