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Chris Brading

Speedo reading slow

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It's quite straight forward to work out but it does depend on your front tire choice. Number of rotations per miles X number of heads per rotation = pulses per mile. I think you need to get a doc of Westfield though to help with the IVA verification and I think this should have the value on it so that it can be matched to the speedo, without the doc you may well have problems with the IVA process. . 

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Thanks With your reply’s, that formulae is excellent. I hedged my bets today and also contacted WF, they told me to set it to 3600, it was on 6000! No wonder I never went above 45mph.

 I was surprised to discover the other information on the speedo, 0-60 time.

1/4 mile distance?

Top speed

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As Rhett has suggested, ask WF for a speedo calibration document. Assuming your speed sensor is on a front wheel, be aware not all test stations can check your speedo calibration with this arrangement. In such circumstances an official document from WF is a must I believe.

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Thanks for the advice here guys! I had exactly the same pre-Iva problem. I followed the advice here and my speedo was calibrated to 6000. Have now set to 3610 as per calibration letter from WF. 

 

Forum to the rescue again!!

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I used the measured mile method,  more accurate and so easy to do.

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On 04/12/2018 at 20:39, SpikeB said:

Thanks for the advice here guys! I had exactly the same pre-Iva problem. I followed the advice here and my speedo was calibrated to 6000. Have now set to 3610 as per calibration letter from WF. 

 

Forum to the rescue again!!

My daughter followed me to my pre IVA MOT and I said I was 'doing' 30 mph on the speedo, she said she was struggling to want to keep up , as she said I was doing over 50 mph in the 30 :d. I said I thought it seemed fast , but thought it always does in a Westie being low, but the wind whistling may have given me the speed knowledge and the way I rushed past things :rolleyes:

  • Haha 1

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