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Old 01-06-2009, 01:30 PM   #8 (permalink)
winkosmosis
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I was thinking about this, but a much easier and more accurate- Use GPS. Any handheld reciever that can export a tracklog should work. Each point in time (usually 1 per second) in the log would have a timestamp and speed.

You could also hook up an OBDII reader to a computer and log the speedometer reading.

Apparently that's how coast down testing works
Measure the drag coefficient of your car
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