there were a few progressions in fuel control, here's the main 3, I don't know who did what when.
Electronic Fuel Injection Mass Flow vs. Speed Density- Car Craft Magazine
But even mass airflow can be improved upon. But if your car doesn't use mass, then your reverse engineering of map vs mpg may be 1-1.
Quote:
Originally Posted by sword_guy8
The calculation uses BPW, which is the length of time the fuel injector is actually open. Knowing the flow rate of the injector, I don't think you can actually get more accurate.
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Couple ways
increase polling rate OR monitor injector/vss events at very small time resolution.
factor in rpm (injector pulse frequency specifically) to sort-of account for the difference in injector opening time vs closing time. (done on every pulse in the event model)
consider if your fuel regulator is referenced to ambient or manifold pressure.