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Old 02-09-2009, 09:40 PM   #1 (permalink)
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Compensating for tire size

I have slightly oversized tires on my car which throws off my speedometer. Until now it hasn't mattered but since I am installing the MPGuino it is an important factor. I have the circumference of the original tires and the current ones and I need to factor that into the MPGuino as well as keep it in mind when calibrating.

What would be the best place for me to factor this in... dialing in -or- hard coding it?

Than You.

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Old 02-09-2009, 09:52 PM   #2 (permalink)
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in the setup screen, adjust vssPulsesPerMile down by the percentage that your speedo is low. Compare the results with some hiway markers over many miles and fine tune.

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