That's a good idea. the more restriction between the pump and measuring cylinder the lower the flow that it could measure accurately. restricting orifice would not have to be bigger than the sum of the main carb. jets, would it. high level detector would be redundant, with the timer, but would accomodate different pumps, but so would adjustable timing.
probably better to dial in the restriction as close as possible to get same accuracy with a smaller volume, because the smaller the measuring volume the closer to instant MPG.
i kept thinking i needed to limit the pump to single strokes, with an adjustable delay then count number of strokes to make a gallon. would almost be real time flow. maybe if i power it thur a signal light flasher it will single stroke.
on the recirculating ball flow meter (rbfm)
, the ball doesn't go around very fast, maybe 1 Hz.