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Power Strokes
94-97 Aftermarket
Obs 38 gallon rear tank.
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[QUOTE="old man dave, post: 958168, member: 1009"] The water flow charts assume a source that can supply water without dropping pressure or volume, like a big pressurized water tank. So the water flow results reflect pipe size changes only and pump efficiency is not involved. Fuel pump efficiency drops off at higher pressures so fuel flow is not linear with pressure. Different pumps will pump different amounts of fuel at a given pressure and pipe size. You have to look at the flow/pressure charts for a given pump to determine which pump actually pumps the most and that they are testing using the same method. Some of the fuel pump flow charts are a little slippery, you have to read the fine print. Some pumps will have a good freeflow rate but at higher pressures, they fall on their butts. For a fuel system, you have to check flow at the pressure you want, not freeflow volume. [/QUOTE]
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Power Strokes
94-97 Aftermarket
Obs 38 gallon rear tank.
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