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Help choosing electric fuel pump
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   Forward Look NON-Technical Discussions -> 1955-1961 Forward Look MoPar General DiscussionMessage format
 
gandalfgreyhame
Posted 2019-12-01 9:03 AM (#590964)
Subject: Help choosing electric fuel pump


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Posts: 3

Hi guys. I have a 1955 dodge royal I'm redoing. It isn't stock. It has
A 318 with mild cam, 4 bbl, dual exhaust. Problem I'm having I cannot
Figure out a good electric fuel pump best for this 318 with an edelbrock
1406 carb. Purchased a precision pump, but doesnt seem to supply enough
Any thoughts?
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Old Ray
Posted 2019-12-01 10:16 AM (#590968 - in reply to #590964)
Subject: RE: Help choosing electric fuel pump



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So, a dark sider huh, my kind of guy, but not always loved around here.

Are you using the electric pump as the main and only pump or as a auxiliary one to supplement the mechanical one?

I think the best for a stand alone use is the "carter style" rotary vane type (maybe P4070 from a old and weak memory), that style is made by many manufactures including Holley and the super exoitic guys. As a boost auxiliary pump, the rotary vane is not good, the vanes can stop in a position to block the fuel flow when shut off, the "thumper" solenoid diaphragm type is best for this use.

There is a guy (Dave) that drag races his, he will come along soon.

Electric pumps pump much better then they suck, the pump should be mounted at the tank.

Are you sure that it is the pump not supplying enough fuel, anyway to measure the flow?

Just a side note from experience, the pump should have a electric shut off switch if the pump is wired direct to the ignition, in case of a backfire the pump will keep pumping fuel until you can shut off the ignition.
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Phil_the_frenchie
Posted 2019-12-01 1:13 PM (#590972 - in reply to #590964)
Subject: Re: Help choosing electric fuel pump



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I have a Facet Purolator pump since more than 10 years (model 87sv ?) on the Imperial. Work well
On '55 Dodge you're still in 6V or you switch to 12V ?

Edited by Phil_the_frenchie 2019-12-01 1:14 PM
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57chizler
Posted 2019-12-01 3:58 PM (#590980 - in reply to #590964)
Subject: RE: Help choosing electric fuel pump



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gandalfgreyhame - 2019-12-01 6:03 AM
Purchased a precision pump, but doesnt seem to supply enough
Any thoughts?


I'm thinking just about any pump should supply a 318 unless you're turning it 12,000 rpm.

What are the symptoms that make you think the fuel supply is insufficient?
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1960fury
Posted 2019-12-01 4:08 PM (#590981 - in reply to #590964)
Subject: Re: Help choosing electric fuel pump



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Location: northern germany
Any mechanical pump will be good enough. Never understood the need to change to electric.
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57plymouth
Posted 2019-12-01 5:24 PM (#590986 - in reply to #590964)
Subject: Re: Help choosing electric fuel pump



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My car is extremely hard to start. I've though about adding an electric pump to prime the carb. Has anyone tried this? I was thinking about adding it in line at the tank powered through a relay and a momentary switch. Just to push gas into the carb and let the mechanical pump run it once it fires. It usually takes 3 or 4 minutes of cranking to prime the carb after it sits for a while.
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57plymouth
Posted 2019-12-01 5:34 PM (#590987 - in reply to #590964)
Subject: RE: Help choosing electric fuel pump



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gandalfgreyhame - 2019-12-01 9:03 AM

Hi guys. I have a 1955 dodge royal I'm redoing. It isn't stock. It has
A 318 with mild cam, 4 bbl, dual exhaust. Problem I'm having I cannot
Figure out a good electric fuel pump best for this 318 with an edelbrock
1406 carb. Purchased a precision pump, but doesnt seem to supply enough
Any thoughts?


I think b the basic Holley electric pump is the black one. What you will want is a preset pump that is set to 7 psi. Holley is the standard for what most guys use around me. If you get one set more than 7 psi you will need a regulator, which is more hassle. Give Summit Racing a call. Their tech line is top notch. They will put you on the right pump for your application.
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KcImperial
Posted 2019-12-02 12:03 AM (#590993 - in reply to #590972)
Subject: Re: Help choosing electric fuel pump



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Phil_the_frenchie - 2019-12-01 12:13 PM
On '55 Dodge you're still in 6V or you switch to 12V ?

Agree with Phil, are you running the elec pump at 6V?

I've been using a E8012S pump for years on several of my old cars (392-440cu and up to 700cfm) mounted externally near the fuel tank
They're loud enough to hear but work great otherwise. They are inexpensive and best of all, they withstand the lousy ethanol fuel in my area
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Old Ray
Posted 2019-12-02 9:53 AM (#591004 - in reply to #590986)
Subject: Re: Help choosing electric fuel pump



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57plymouth - 2019-12-01 3:24 PM I've thought about adding an electric pump to prime the carb. Has anyone tried this?


Yes. My last three projects are at best weekend drivers and sit a lot, ... all have a electric priming (and emergency run) pump. Work great.




(f1 electric fuel pump 4 (845 x 634).jpg)



Attachments
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Attachments f1 electric fuel pump 4 (845 x 634).jpg (136KB - 4 downloads)
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57chizler
Posted 2019-12-02 12:51 PM (#591013 - in reply to #590986)
Subject: Re: Help choosing electric fuel pump



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57plymouth - 2019-12-01 2:24 PM

My car is extremely hard to start. I've though about adding an electric pump to prime the carb. Has anyone tried this? I was thinking about adding it in line at the tank powered through a relay and a momentary switch. Just to push gas into the carb and let the mechanical pump run it once it fires.


You gotta be careful when choosing an electric pump for this purpose, some electric pumps aren't "pull through". IOW, they won't allow the mechanical pump to pull fuel through when the electric is shut off.

The E8012S pump mentioned above allows pull-through.

Edited by 57chizler 2019-12-02 12:57 PM
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Powerflite
Posted 2019-12-02 10:12 PM (#591031 - in reply to #590964)
Subject: Re: Help choosing electric fuel pump



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An electric pump would be nice just to drain the tank during the winter months or when you don't plan to drive it for quite a while so the gas doesn't sit in the tank and cause it to gum up.
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Old Ray
Posted 2019-12-03 9:34 AM (#591038 - in reply to #591031)
Subject: Re: Help choosing electric fuel pump



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Powerflite - 2019-12-02 8:12 PM An electric pump would be nice just to drain the tank during the winter months or when you don't plan to drive it for quite a while so the gas doesn't sit in the tank and cause it to gum up.


Fuel stabilizer ?
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westaus29
Posted 2019-12-04 12:59 AM (#591056 - in reply to #590986)
Subject: Re: Help choosing electric fuel pump


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After installing a new carby and new mechanical fuel pump on my 55 Plymouth Suburban 259 v8 and still having priming problems (30 sec cranking before it would start) I added a facet electric fuel pump in series close to the tank, mounted on the chassis under the left rear door. Model FAC40106 4-6 psi 34 gal/hour. Activated by push button on dash and only used to prime before starting. Works great. Cost peanuts.

Edited by westaus29 2019-12-04 1:00 AM
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Old Ray
Posted 2019-12-04 9:58 AM (#591067 - in reply to #591056)
Subject: Re: Help choosing electric fuel pump



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westaus29 - 2019-12-03 10:59 PM Activated by push button on dash and only used to prime before starting.

Perfect !

As a redundancy, in case of mechanical pump failure (it happens), I use a off and on switch.

OR: On my next projects I am going to move "bigly" outside of my comfort circle into fuel injection that comes with a electric fuel pump. 

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1960fury
Posted 2019-12-04 2:53 PM (#591075 - in reply to #591067)
Subject: Re: Help choosing electric fuel pump



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Old Ray - 2019-12-04 9:58 AM

westaus29 - 2019-12-03 10:59 PM Activated by push button on dash and only used to prime before starting.

Perfect !

As a redundancy, in case of mechanical pump failure (it happens),


Absolutely everything can break down. Install a good mechanical fuel pump and forget about it. I replaced my stock pump with a new Carter high performance pump, just in case. Until now the "new" one still works like new. That replacement took place around 1991.
I carry a spare, same brand/model, in the trunk for several years now and if the old one fails it is replaced in 20 minutes, or less.
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Phil_the_frenchie
Posted 2019-12-04 3:13 PM (#591076 - in reply to #591075)
Subject: Re: Help choosing electric fuel pump



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Old Ray - 2019-12-04 9:58 AM


I carry a spare, same brand/model, in the trunk for several years now and if the old one fails it is replaced in 20 minutes, or less.

Same thing for me except it's a spare electric pump !

Edited by Phil_the_frenchie 2019-12-04 3:15 PM
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51coronet
Posted 2019-12-04 5:55 PM (#591083 - in reply to #590964)
Subject: Re: Help choosing electric fuel pump


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carter rotary vein pump. They are super simple and work. You can even open them up and possibly repair or replace some parts. The motor is fuel cooled and the pump is lubricated by the fuel. Its a super simple design that works. I like them simply because they are simple and serviceable. On a new install mine seized on day 2 and blew the fuse (10amp) I installed. I opened up the pump and was able to clear the veins to work again. Fuel filter is a must but sometimes small debris during install can get by and cause a vein to get stuck. Its super simple to fix.

Edited by 51coronet 2019-12-04 5:57 PM
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sermey
Posted 2019-12-05 4:43 AM (#591103 - in reply to #590964)
Subject: RE: Help choosing electric fuel pump


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This may give you some additional ideas:

http://www.forwardlook.net/forums/forums/thread-view.asp?tid=23691&start=56

A separate ON/OFF switch is mounted under the dashboard for "only mechanical fuel pump" operation.  - SERGE -

 

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