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electric fuel pump installation

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Old Jul 26, 2006 | 12:27 PM
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Default electric fuel pump installation

Due to an engine swap, I'm unable to use a mechanical fuel pump and have to go with an electric one. According to holley, the pump should be located close to the tank and the regulator close to the carb. My question is, does it really have to be this way? I have no idea how to cut the fuel line from the tank with a tank full of gas without endangering myself. Can I just install the pump and regulator somewhere in the engine bay where the existing lines and hoses exist that go to the carb?
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Old Jul 26, 2006 | 12:38 PM
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Loosen your gas cap and from the front lightly blow fuel back into the tank-that should clear lines-and yes do it Holleys way and use a relay and oil pressure switch so it will be safe----that would be a no to putting it up front
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Old Jul 26, 2006 | 12:40 PM
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Thank you!!! So, it's not dangerous to cut the lines back there to rpoportionate the pump?
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Old Jul 26, 2006 | 12:59 PM
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Electric fuel pumps are excellent at pushing fuel, but they are very poor at drawing a vacuum necessary to pull the fuel from the rear of the car. It would be best to mount the pump somewhere in the rear of the car, as close to the tank as feasible.

There is a length of rubber hose that goes from the tank to the steel line (that runs to the front of the car) on the aft right frame rail. If you have a rubber plug or even a piece of blocked off fuel line, it will only take a second to remove the hose from the tank and install the plug. You're then ready to plumb the fuel pump.

I found a spot on the inside of the frame rail, between the rear cross member (above the differential) and the fiberglass body. There is more than enough room to attach it there and it provides a measure of security for the pump. I wanted to keep it away from the very rear of the car in the event the car is rear ended. However some mount it directly to the rearmost cross member of the frame. In any event, it's easiest if you remove the spare tire carrier to mount it. You can return the spare tire carrier when done, there's plenty of clearance.

I ran the hose from the tank to the inlet of the pump and from the outlet of the pump to the metal line that goes to the front. It adds about 12 inches more of hose than originally, but I didn't have to cut any of my new SS fuel lines. Don't forget to wire in an oil pressure switch that cuts power to the fuel pump when oil pressure is lost.

Good luck... GUSTO
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Old Jul 26, 2006 | 01:00 PM
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No its not dangerous unless you use a torch. Like DW says blow the fuel in the line back into the tank, then cur the line in the back and mount the pump back there. Then run juice to it thru a relay and oil pressure switch so it shuts off if the engine dies. The regulator should be op front preferably right on the carb fuel inlet. Be sure and turn the fuel pressure down to what the carb or fuel system your useing requires.
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Old Jul 26, 2006 | 01:18 PM
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Thank you very much for all your input. All that took a load of hesitation to do this without fear of exploding or something......... .
to all.
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Old Jul 26, 2006 | 02:23 PM
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Help again, please. I followed the fuel line to the tank and it's all copper plumbing. How and where is the best place to cut this to connect to the pump?
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Old Jul 26, 2006 | 02:58 PM
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Originally Posted by 81cali
Help again, please. I followed the fuel line to the tank and it's all copper plumbing. How and where is the best place to cut this to connect to the pump?
Steel not copper -right? OK--remove gas cap and gas lid from body-you should see the short rubber lines going to the steel ones-the line closest to back of car and on your right is the one for your input to the pump(the other is the return line)run a rubber hose down to where you mount your pump-thats your tank to pump line-then cut the steel line going to the engine put in a short piece of hose and that parts done-please dont forget the relay and oil pressure safety switch-and use only a flashlight while working around gasoline if fuel hits an incandesant it will break it and BOOM.
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Old Jul 26, 2006 | 04:23 PM
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Thank you. I guess since I've been looking at houses lately and their copper plumbing, everything that comes out of my mouth is copper when it comes to lines.........lol . Anyway, thank you for the input. We did take the spare down and couldn't locate the line (rubber). What you just said is what we'll do. Another question, does the fuel pump need to be upright? (I mean not sideways or any other way)
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Old Jul 26, 2006 | 05:15 PM
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All the Holleys I have known have to be upright-If they make some of those little electronic ones that might be differant-the instructions should help you there
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Old Jul 26, 2006 | 05:49 PM
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thanks again, will keep you posted and post pics for others too.
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Old Jul 26, 2006 | 06:53 PM
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Here is where I posted some pictures of my electric fuel pump installation.
Post showing my fuel pump installation

Hope this helps,
Craig
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Old Jul 26, 2006 | 09:15 PM
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Thanks for the pics. Your setup is .
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