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302GT
Larry Shimp

(169 posts)

Registered:
11/17/2007 01:13PM

Main British Car:
1968 MGB GT Ford 302 crate engine

Parallel Fuel Pumps
Posted by: 302GT
Date: June 21, 2017 04:16PM

I have found a solution, l think, to (low pressure) fuel pump failures. I put two Facet cylinder style pumps in parallel. These are incredibly reliable, and one pump is enough for about 200 to 250 HP continuous. Two in parallel are needed for higher sustained power, but one is plenty for any type of highway driving. The odds of both failing are too low to worry about. In addition, the pumps are rather quiet, and have a low current draw; two may draw less current than a single rotary pump.



Edited 1 time(s). Last edit at 06/22/2017 12:27PM by MGBV8.


MGBV8
Carl Floyd
Kingsport, TN
(3143 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Parallel Fuel Pumps
Posted by: MGBV8
Date: June 22, 2017 12:31PM

Graham Creswick asks:
Quote:
Facet makes several different style fuel pumps - do you have a specific Facet part # or model ID no., Larry?



MGBV8
Carl Floyd
Kingsport, TN
(3143 posts)

Registered:
10/23/2007 11:32PM

Main British Car:
79 MGB, Buick 215

authors avatar
Re: Parallel Fuel Pumps
Posted by: MGBV8
Date: June 22, 2017 12:32PM

Larry Shimp's answer:
Quote:
The red top pump; FAC-480532 is what I am using. Rated at up to 45 gph; 6 to 8 psi. Only draws about 1 amp. Also contains an internal filter.

One source is pegasusautoracing.com.



Moderator
Curtis Jacobson
Portland Oregon
(4298 posts)

Registered:
10/12/2007 02:16AM

Main British Car:
71 MGBGT, Buick 215

authors avatar
Re: Parallel Fuel Pumps
Posted by: Moderator
Date: June 22, 2017 02:16PM

I'm skeptical of all the low-pressure aftermarket fuel pumps.

I used one of those Facet ("Bendix style") pumps for awhile, but it died prematurely. To the company's credit, they replaced it for free. But I had already purchased and installed a Mallory pump. The Mallory pump also died young, while at the BritishV8 2009 meet (in Durham NC), so I switched to an inexpensive generic pump that Mike Maloney was carrying as a spare.

Carrying spare parts everywhere I go isn't acceptable to me. I simply refuse. If you start thinking that way, where do you stop? Installing two similar parts in series or in parallel because one can't be trusted seems an even worse idea.

What we need are parts we can believe in... Would anyone accept these failure rates on a brand new car? Of course not! For best results, I recommend upgrading to EFI so you can leverage modern OEM-quality parts.


88v8
Ivor Duarte
Gloucestershire UK
(472 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
TR6 74 2.5 injection six

Re: Parallel Fuel Pumps
Posted by: 88v8
Date: June 23, 2017 04:35AM

One can get unlucky. Or not.
I have a Facet on my Land Rover V8. Never died yet. Nor the Facet on my previous V8, so that covers 18 years.
On my Rolls there was some horrible little aftermarket rotary, orrible but worked OK.
On the Rambler I now have an Airtex rotary to replace the dead mechanical original, we'll see how that holds up.

In contrast, the original (dead) SU pump on the Rolls was two in parallel, and when I had an original SU on my Lanchester that was so unreliable I used to carry a spare and the tools to fit it.

Only problem with two in parallel, is how you know when the first one has failed :)

Ivor


302GT
Larry Shimp

(169 posts)

Registered:
11/17/2007 01:13PM

Main British Car:
1968 MGB GT Ford 302 crate engine

Re: Parallel Fuel Pumps
Posted by: 302GT
Date: June 23, 2017 08:29AM

I have had Facet pumps in my two Alfa Romeos for 24 and 26 years, with no problems. Mileage is not as high as on the MG, but sitting with alcohol containing gas is not the most favorable condition. Facet pumps were original equipment on Alfa, Ferrari, Maserati and other expensive European cars. They were designed to OEM standards and are not just aftermarket parts.


BlownMGB-V8
Jim Blackwood
9406 Gunpowder Rd., Florence, KY 41042
(5240 posts)

Registered:
10/23/2007 12:59PM

Main British Car:
1971 MGB Blown,Injected,Intercooled Buick 340/AA80E/JagIRS

authors avatar
Re: Parallel Fuel Pumps
Posted by: BlownMGB-V8
Date: June 23, 2017 10:25AM

I use the Bosch 044 clone pump these days. Probably the single most common fuel pump used in all forms of racing today from what I hear, it's rated at 300L/hr. Now that's massive overkill for most applications but for a reliable pump that will never fail to deliver enough fuel and is quiet in operation yet only costs about $50, well so far so good. It does require a bypass regulator and the return line should be as large as the supply line in carbed applications to get proper pressure regulation.

It's an external pump and should have a large supply line. I use AN-8 for that.

Jim



JWD
Jim Durham
Gig Harbor, Wa.
(98 posts)

Registered:
01/22/2013 11:43AM

Main British Car:
1980 MGB Ford 302 (398.9 HP, 383.2 TQ)

Re: Parallel Fuel Pumps
Posted by: JWD
Date: June 23, 2017 06:48PM

What a timely topic. My Facet pump (FEP87SV) failed in less than 100 miles. I replaced it with an Airtex rotary style pump (E84070). It's much quieter and has a twice the capacity, 72 GPH vs. 36 GPH. So far, so good.



Edited 1 time(s). Last edit at 06/23/2017 07:09PM by JWD.


danmas
Dan Masters
Alcoa, Tennessee
(558 posts)

Registered:
10/28/2007 12:11AM

Main British Car:
1974 MGBGT Ford 302

authors avatar
Re: Parallel Fuel Pumps
Posted by: danmas
Date: June 23, 2017 07:58PM

Quote:
...so I switched to an inexpensive generic pump that Mike Maloney was carrying as a spare.

Carrying spare parts everywhere I go isn't acceptable to me. I simply refuse.

But aren't you glad Mike carries spares?


JWD
Jim Durham
Gig Harbor, Wa.
(98 posts)

Registered:
01/22/2013 11:43AM

Main British Car:
1980 MGB Ford 302 (398.9 HP, 383.2 TQ)

Re: Parallel Fuel Pumps
Posted by: JWD
Date: June 23, 2017 08:21PM

I carry no spare parts because the last thing I want to do is work on a car on the side of the road. My insurance will pay to have any car I own flat-bed trucked to my shop where I can put it on my lift and work on it at my leisure.


88v8
Ivor Duarte
Gloucestershire UK
(472 posts)

Registered:
02/11/2010 04:29AM

Main British Car:
TR6 74 2.5 injection six

Re: Parallel Fuel Pumps
Posted by: 88v8
Date: June 24, 2017 07:07AM

Ahhh, spares.
For years I carried spares in the TR6. Hoses, plugs, fan belt, injectors, points, leads, bulbs of course, rad cap, distributor cap, rotor arm, I forget what else.
And the tools to fit them.

The only part I ever used was the fan belt.

But when you're miles from home in a 40 year old car, it feels good to have some parts with you. Flatbed is OK, had that free ride a couple of times in 48 years, but I'd hate to have an outing spoiled for some fault I could have fixed with the basic parts.

Plus of course the tools to fit them. Did I mention tools? Dunnarf feel a fool when one has the parts but not the tools.

Ivor


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