The problem with this method (BG below) is it totally ignores the weight of the vehicle. Here's a test I plan to preform someday soon: Take fuel bowls off carb and put them in cans and turn on the fuel pump and see just how much the pressure drops at maximum float drop.
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...barygrant...has got a ton of good info on this topic. Basically, their "fuel Can Test" pretty much makes the line size / pump size topic a moot point. It's based on how many seconds it takes to fill a 1 gallon gas can.
