Thread: Scangauge
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Old 01-30-2019, 12:31 PM   #3 (permalink)
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ScanGauge allows you to adjust the speed (and thus distance) and gallons used. Both can be set to a pretty wide range, but real speed and real gallons is what should be used, if you want realistic fill up and distance to empty data.

That said, the way the ScanGauge, and other devices, calculate fuel flow is strange. It uses the airflow data and multiplies that by the nominal stoichiometric ratio to get fuel flow. Why it doesn't use the fuel flow data right from the car is beyond me. It doesn't even use the open loop data that's there to adjust it for when you aren't running closed loop.

Big thing NOT to do is to try to adjust it every fill up. Track a few fill ups and tweak it as you like.
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