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.

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.