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Old 06-15-2016, 01:06 PM
lippy lippy is offline
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Cobra Make, Engine: ERA 427, 427/487 side-oiler
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My thinking is that a mechanical pump's pressure and flow are lower at low RPM and higher at high RPM. It naturally delivers less when the engine needs less. An electric pump puts out max pressure and flow even at idle, so the excess fuel the engine doesn't need at part load is recirculated back to the tank. Not sure why you would do that with a mechanical pump.
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