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Electric Fuel Pump woes.......

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Old 09-15-2017, 07:36 PM
  #11
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Originally Posted by kip4234 View Post
That is my question also I was always told to put like 100 micron pre pump and the big type spin on after the pump ???
He has a carb set up

for MPI if it has the boost fuel pump 100 mc filter before that and 10 thru 25 mc filter after the boost pump for the high pressure fuel pump.

VST fuel system is different yet. The main filter is in the VST tank
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Old 09-16-2017, 12:08 AM
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I was always told or read that you needed to run a filter before a elec fuel pump so to kill two birds so to speak I make sure to keep it close to the pump so it would act as a kind of tiny reserve tank for the pump. Solved the issue a few years back for me and I have been doing it that way ever since. With the elec's I can leave them sit winterized all winter and not have an issue. The one mechanical I have.....I make sure I have 2 strong batteries before going to the ramp after it sat a while.
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Old 09-16-2017, 05:05 AM
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Originally Posted by dereknkathy View Post
Do you put a seperator both sides of the pump?
yes just like Merc did from factory on the mpi, imo can't be too clean.
Not worried about restriction, - 8 fuel lines from tank to regulator, 15 psi out of pump regulated to 6.5 at carb inlet. Tested free flow, fuel comes out like a fire hose just before regulator.
Have O2 sensors so I know there is no issue with fuel system at my power level.
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Old 09-20-2017, 08:10 AM
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I used a Fuel Labs fuel filter after the pump with a build in check valve, bought from Jegs. No issues.
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Old 09-27-2017, 12:55 PM
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The holly pumps should have a built in fine mesh brass screen - in the pump suction side . Can be field serviced with a 3/8 socket and a can of carb spray. Gets hot in these parts , so I usually just run a merc (delco) f/I filter between that and the fuel finicky holley carb and all is good. Make sure the pump is always getting a good 12.5v or more esp. When cranking for best results
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