Quote:
Originally Posted by Aveomiler
Wow. This is very interesting. I've been wondering myself about the reliability of my testing. Does anyone know of the reliability of this compared to measuring fuel economy while holding speed to test improvements? I suspect coast down testing would be a little more reliable, but as many of us know, even the tiniest variations in a driving commute can contribute significant variations in fuel economy. Ideally, it would be nice to average 39 runs in A-B-A style for testing, but that is very time (and gas) consuming.
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Hi Aveo,
As for the reliability of straight-line A-B-A testing, I would rely on that type of testing more than coast down testing until I can develop some type of automated setup that takes the VSS speedometer readings from the Insight and logs it onto an SD card for later retrieval.
MetroMPG and others have seemed to provide reliable data by this method.
Jim.