Depending on the vehicle, it can be done in software. I changed my tire size with a tuner. I know in a lot of cases a dealer can do it for you. It's a fairly common thing to do with pickups, as there are folks out there who put on huge tires and still want a reasonably accurate speedometer.
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Diesel Dave
My version of energy storage is called "momentum".
My version of regenerative braking is called "bump starting".
1 Year Avg (Every Mile Traveled) = 47.8 mpg
BEST TANK: 2,009.6 mi on 35 gal (57.42 mpg): http://ecomodder.com/forum/showthrea...5-a-26259.html
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