Electric Fuel Pump location

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Electric Fuel Pump location

Postby Wfolland on Mon Jul 09, 2012 5:27 am

Can anyone direct me as to where the electric fuel pump should be located on my 1979 Spider?. Currently mine is located under the hood just prior to going into mechanical fuel pump. Have been told the electric pump should be located further back and closer to the fuel tank. My engine is mostly stock except for a Weber 32/36 and single plane manifold upgrade. Any suggestions on electric fuel pump manufacturer?
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Re: Electric Fuel Pump location

Postby Daniel on Mon Jul 09, 2012 6:28 am

I've installed many electric fuel pumps in the trunk, the one thing i can tell u is if its a noisy pump your
going to hear it. The last pump i installed was a Mallory it wasn't the cheapest but smooth very little noise
couldn't be heard in the car.
Last edited by Daniel on Mon Jul 09, 2012 8:15 am, edited 1 time in total.
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Re: Electric Fuel Pump location

Postby lanciahf on Mon Jul 09, 2012 7:04 am

79 Spiders came stock from the factory with a mechanical pump. The mechanical pump is located under the intake manifold. You should see if its still there???

On my 79 I removed the fuel pump lobe from the aux shaft and fitted an electric pump under the car , right below the rear seat on the drivers side. Right by the metal fuel lines poking out by the rocker panel and trailing arms.
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Re: Electric Fuel Pump location

Postby So Cal Mark on Mon Jul 09, 2012 9:09 am

an electric pump should be as close to the tank as possible and mounted with rubber insulating blocks
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Re: Electric Fuel Pump location

Postby Wfolland on Mon Jul 09, 2012 9:34 am

THANKS EVERYONE FOR THE INFO, ALL WERE VALUABLE. OTHER THAT THE MALLORY PUMP ANY OTHER SUGGESTIONS?
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Re: Electric Fuel Pump location

Postby djchan on Mon Jul 09, 2012 3:13 pm

Don't buy any "square" electric pump, the clicking noise will drive you crazy! I put in an old used low pressure Carter in mine.
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Re: Electric Fuel Pump location

Postby So Cal Mark on Mon Jul 09, 2012 4:38 pm

if the pump has an adequate fuel supply and rubber mounts it will be quiet. Pumps are noisy when they are starved for fuel
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allisonsautomotive.com gear reduction starters for the 124, 131, X1/9, 850 Distributorless ignitions for 124, 131, X 1/9, Monza wheels
X1/9, 131, 124 Spider exhaust system, http://www.fiat500speed.com
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Re: Electric Fuel Pump location

Postby Schnauzer on Mon Jul 09, 2012 4:44 pm

I just replaced the pump in my 76. Mine was the rotary type and very noisey. I asked Mark at Allison for his recommendation. Mark sent me a Facet electronic pump. I mounted it right next to the fuel tank. It is dead quiet and works great!

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Re: Electric Fuel Pump location

Postby Daniel on Mon Jul 09, 2012 11:51 pm

Don't buy any "square" electric pump, the clicking noise will drive you crazy! I put in an old used low pressure Carter in mine.

Yes these are very noisy low dollar pumps i haven't seen any like this around for at least a decade i'd be surprised if they are still being manufactured.
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Re: Electric Fuel Pump location

Postby lanciahf on Tue Jul 10, 2012 6:54 am

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Re: Electric Fuel Pump location

Postby So Cal Mark on Tue Jul 10, 2012 9:22 am

the Facet pumps are still being built and they are not a "low cost" poor quality pump. There are several knock offs on the market though
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allisonsautomotive.com gear reduction starters for the 124, 131, X1/9, 850 Distributorless ignitions for 124, 131, X 1/9, Monza wheels
X1/9, 131, 124 Spider exhaust system, http://www.fiat500speed.com
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Re: Electric Fuel Pump location

Postby Wfolland on Wed Jul 11, 2012 10:28 am

thanks much to Mark,djchan,Schnauzer,Daniel & Lanciar for updates on pump.

Here is my situation, the pump installed under the hood is a Facet, what puzzles me is that a previous owner has installed a toggle switch in the cockpit to turn pump on and off. spider seems to run fine without the pump on. if I didn't mention it before the pump is located in the fuel line prior to block mounted mechanical fuel pump. why this configuration?, anyone got any idea why ?,
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Re: Electric Fuel Pump location

Postby Schnauzer on Wed Jul 11, 2012 12:42 pm

It is possible that after sitting fuel drained back to the tank. The mechanical pump on the engine takes a long time to pump all the way from the tank. P/O probably activated his electric pump for a short time prior to starting cold then shut it off when the mechanical pump on the block was primed. Hence the switch.
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Re: Electric Fuel Pump location

Postby leftfield6 on Wed Jul 11, 2012 4:46 pm

Sounds like a belt and suspenders approach to me. Back when I had my 79 Spider, I eliminated the mechanical fuel pump, and mounted an electric back in the trunk. I found some rubber insulating blocks to mount it on, as others have recommended.

So, here was my order of fuel flow:

Gas tank ---> inline fuel filter --->electric pump---> factory metal lines to engine bay--->another inline fuel filter---" carb fuel intake.

Back in the day, Bayless made a really sweet block off plate to use when you remove the mechanical fuel pump.
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Re: Electric Fuel Pump location

Postby Wfolland on Thu Jul 12, 2012 11:12 am

Thanks again ,to all whom have posted, for your valued input. Hope is that at sometime in the future I will have valued input such as you folks have freely shared.
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