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Old 02-04-2009, 10:04 PM
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chevy 350 mechanical fuel pump question

my mech. fuel pump has 1 inlet and 2 outlet ports...im assuming that the one thats plugged (not my doing) is the return to the fuel tank. my question is can i use either one to route fuel to the reg then to the carb or is it specific? they look to be the same size port (3/8" npt)

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Old 02-04-2009, 11:01 PM
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nobody? somebody? anybody?
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Old 02-05-2009, 02:52 AM
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First of all... relax. You posted those two an hour apart. Be patient

Secondly, no. You must use the feed line. The return line is not sufficient flow or pressure.

Thirdly, get a proper pump. Never just cap off the return line for two reasons: 1- you are preventing the excess pressure from returning to the tank, therefore giving the carb too much pressure, and 2- it WILL fail and when it does it will randomly spray raw gasoline everywhere.

The correct pump is $20. Try looking for an SBC application without A/C. They usually don't have the return port.
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