[Healeys] Computing speeds

[Editorgary at aol.com]

In a message dated 7/11/07 3:46:58 PM, healeys-request at autox.team.net writes:


> ...this one.  Providing the diameter of the tire for the
> computation is just so the program can determine the circumference.  The
> circumference, or distance around the tire will remain constant...
>
Or you could just stick your Garmin Nuvi nave system to the windshield and
watch the exact mpg based upon the rate of change in your map coordinates.
Monday coming home from getting a Pertronix and tune-up, the car was doing a
measured 75 mph, while the speedometer read 82 mph, with the tach showing 2800
rpm.
Very, very nice.

Cheers
Gary





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