Electric fuel pump mounting

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Electric fuel pump mounting

Post by WyldeBill66 on Sun Jun 08, 2014 3:02 am

I am going to be mounting a new Holley electric fuel pump on my 75 Chevelle. On there right now is an Autozone small one that I suspect has been the root of all my troubles. My question is, any of you who mounted a pump like this, where did you mount it? The old pump was mounted above the rear end in front of the fuel tank. Everything I've read said it should be below the level of the fuel tank, not above it. I'd appreciate any tips or better yet, pictures.

Thank you all in advance.

Bill

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Re: Electric fuel pump mounting

Post by pila on Sun Jun 08, 2014 11:40 am

I've run a few electric pumps, but always an inline type, along with the engine driven pump. My current El Camino project has the pump under the cover in the front of the bed. If you are using just the electric pump, having it below the fuel level may be important, to keep it primed.

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Re: Electric fuel pump mounting

Post by bracketchev1221 on Mon Jun 09, 2014 2:57 pm

Standard vane type electric pumps are not good at creating a suction so they sometimes can starve due to the siphon effect being enough. Gerotor type fuel pumps are much better at pulling and maintaining a vacuum for the pump. Though they do generally cost more money.
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Re: Electric fuel pump mounting

Post by thatfnthing on Mon Jun 09, 2014 3:21 pm

Best location is in the tank. No worries about lack of fuel, and it runs cooler and quieter. The downsides are that it's more work to install/replace, in-tank units can be more expensive, and you may have to modify the trunk floor depending on the unit.
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Re: Electric fuel pump mounting

Post by dynchel on Mon Jun 09, 2014 5:45 pm

You could always run a caprice tank with a replacement (in tank) pump.
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Re: Electric fuel pump mounting

Post by WyldeBill66 on Tue Jul 29, 2014 12:52 am

I already have the pump, so I just want to know if anyone has mounted one and where they did. I want to quit fighting with the fuel issue. I don't think on the frame would be a good place, as if I throw something up with the back tire, it would be in harms way. Any ideas out there?

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Re: Electric fuel pump mounting

Post by brownbomber77 on Thu Jul 31, 2014 10:08 pm

I mounted mine on the back side of the upper control arm mounts on the frame. It's a pretty natural route for the fuel line.

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Re: Electric fuel pump mounting

Post by WyldeBill66 on Thu Jul 31, 2014 10:10 pm

Someone suggested that. I'll have to jack up the car and take a look under there and see how it looks. Thank you.

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Re: Electric fuel pump mounting

Post by dynchel on Thu Jul 31, 2014 10:13 pm


Here is a picture of the general area, there would be plenty of room w/o the global west support bars.
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Re: Electric fuel pump mounting

Post by pila on Thu Jul 31, 2014 11:04 pm

Good pic of the Global frame braces too ! Very Happy  That's one of my next jobs, bolting those in my Elco...

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Re: Electric fuel pump mounting

Post by WyldeBill66 on Fri Aug 01, 2014 12:50 am

I tried to look up in there the other day, but I need to jack up the back of the car to see it really good. Car too low to slide under there well enough until I do. I will check it out this weekend and see what it looks like. Thanks for the tips everyone. I'll let you know how it goes.

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