I've had a request for a fuel economy estimate on the datalogger that I wrote

anyone else done this kind of calc and have some advice?

am I foolish in my assumption that inj. pw multiplied with a constant representing fuel sprayed per pulse would be the best baseline? (I think that's how EE vettes did it)

obviously should reference map so I can scale for fuel pressure variation too (vac reference regulator and all)

or should I be thinking more along the lines of maf afgs @ 14.7:1 and say ???? when it's not in CL