A need for speed?
Posted:
Thu Nov 05, 2009 6:27 amby paulrhein
I have notice that my speedometer is off about 10%. When my speedo reads 55mph; I am actually doing 50mph or less. Is there any way to calibrate the speedo so it and the OBC read the same? BTW my OBC seems to display the correct mph.
Re: A need for speed?
Posted:
Fri Nov 06, 2009 1:46 amby pritch21
the analog speedos in the majority of cars go out of calibration over time, if it was me i wouldnt be bothered, unles it was massivlly out
Re: A need for speed?
Posted:
Thu Nov 26, 2009 7:07 pmby 96_323
Changing alloys can contribute to false speed readings on the speedo.
Heres a handy little chart
http://www.miata.net/garage/tirecalc.htmlenter original tyre size and then new tyre size and will give you the percentage it will be out and will give you an example of speeds.