Determining BSFC map from logged OBD2 data

[fumesucker]

I had planned on collecting data on aero drag and rolling resistance through some coast down runs and then incorporating that data in the spreadsheet. Once you characterize the coast down you can then add that to the acceleration data and largely compensate for drag and rolling resistance. My biggest problem is that I live in a relatively hilly area and finding a flat straight road that is free enough of traffic to do coast down tests is hard.

I wrote a performance calculator program in Visual Basic for electric powered model airplanes about a dozen years ago after collecting equations from about thirty years worth of old magazine articles among other sources.. By today's standards my program was pretty primitive but it gave surprisingly accurate results for things like climb rate, motor run time, stall speed and so forth.

I'd like to take the same kind of simulation techniques and apply them to helping people save energy in their driving.