Quote:
Originally Posted by California98Civic
Thanks Ford Man, but the calculator is not quite precise enough, since inflation pressure can change the diameter a little and I run my tires pumped-up high. And anyway, the real question I am asking is about the disparity between the 8% or 9% speed increase and the 1.9% distance increase that my measurements so far suggest. Does the ECU is process data from the VSS in two different ways? Or does the VSS not supply the data for distance? I didn't find the answer in the service manual. Thanks in advance... james
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From cars I now own or that I've owned in the past it seems that maybe the manufacturer factors in a small buffer on the speedometer, maybe this is done intentionally to keep from being tied up in law suits because of speedometers that are reading too low, therefore causing people to get ticketed for speeding. As far as I know all modern cars speedometer/odometer's are calibrated through the VSS.