electric fuel pump

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Apr 9, 2005 | 09:56 AM

#16

53wa2fl

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From: Floriduh

Even with as high flow mechanical pump, it will STILL blow out the diaphram. The mechanical pump is only designed to deliver about 7 PSI max if it is unregulated. Even if the mechanical pump needs a regulator, it still is only set to deliver up to around 14 psi max. That is a far cry from the 40 PSI required on an intank fuel injection fuel pump.

Apr 9, 2005 | 03:44 PM

#17

six7seta

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so if i got a regulator, i could use the electric pump right? i mostly just want to use it because it will act like a kill switch to help prevent my truck from getting stolen

Apr 9, 2005 | 09:41 PM

#18

53wa2fl

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Joined: Sep 2004

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From: Floriduh

There is no way to safely run an electric fuel pump in line with a mechanical pump. None. If you want an electric pump on the car to put onto a toggle switch to act as a kill switch, then you will have to run JUST an electric fuel pump.

There are two basic types of fuel pumps:
1)high pressure Any pump generating in excess of 20 PSI. for fuel injection
2)low pressure Any pump generating lower than 20 PSI. fro carburated applications

The components from one can not cross over to the other. I.e. Taking a high pressure pump and putting on a low pressure pump regulator. This will result in either blowing out the regulator diaphram or burning up the high pressure pump. In either case, it's not good.

So you see, there is no way to run a high pressure pump on your set up unless you convert over to fuel injection. If you do that though, you can not run the mechanical pump.

Sorry to be such a killjoy.

Also, if you run an electric (low pressure pump) in line with a mechanical (again low pressure) pump, even with a kill switch, the mechanical pump will simply pump the fuel and the kill switch is useless.

Last edited by 53wa2fl; Apr 9, 2005 at 09:43 PM. Reason: forgot to add some stuff.

Apr 10, 2005 | 12:56 AM

#19

six7seta

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thanks alot for all the info you gave me.... i know you save me alot of time from learing that first hand... and some money!

Apr 10, 2005 | 07:54 AM

#20

Walston

Cargo Master

Joined: Aug 2004

Posts: 2,575

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From: Greenville, SC

I would like to install and electric fuel pump with a carb set up also. How noisy are the low pressure pumps? Where can I buy one and where can I buy a regulator? My carb is a 4 bbl Carter.

Thanks

Apr 10, 2005 | 11:31 AM

#21

Madathlon

Posting Guru

Joined: Dec 2004

Posts: 1,474

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From: Shasta Lake, Ca.

Watson.. Im Running a profuel pump in my truck from Kargen.. Its mounted under the hood and I cant hear it when I turn the key on..

It works great. I removed my mech pump and blocked off the opening.. The ele pump help with quiker starts and helps advoid Vaporlock.. Make shor you run a good filter before the pump..

Apr 10, 2005 | 11:58 AM

#22

53wa2fl

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From: Floriduh

Walston,
You can buy an electric fuel pump (low pressure or otherwise) from Jegs http://www.jegs.com or Summit http://www.summitracing.com The Holley Blue pumps are fairly loud in my opinion. I dont have any experience with any of the others so I couldnt tell you how loud they are. The drone of the engine usually drowns out the noise of the pump though.

Apr 10, 2005 | 12:01 PM

#23

Randy Jack

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Joined: Jun 2004

Posts: 4,190

Likes: 2

From: Riverside, So Cal

Walston -

I run a Carter electric pump (p/n CRT-P4070) 5-7 psi that draws 4.5 amps in lieu of the mechanical pump. It feeds an Edelbrock 600 cfm 4V carb. No problems. Very reliable. Plenty of volume at high rpms. Won't overpower the carb resevoir needle valves and is within the Edelbrock recommended psi rating and delivery volume.

I mounted mine on the frame rail under the cab below the driver's seat. You can hear it with the ignition on and engine off, but it's not very loud. Fire up the engine and it can't be heard at all. The pump comes with its own bracket and rubber isolators to quiet it even more. (I didn't use the isolators).

I also rerouted the fuel line so that it crosses over to the tranny tunnel, then up to the firewall where it transitions to a rubber line that exits immediately behind and to the right side of the carb. Used an Edelbrock "banjo" fitting at the carb inlet. Very clean install.

I bought it out of the Summit Racing catalog for $59.95.