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EFV-8 Club Forum / General Ford Discussion / Dual Carbs & vapor lock

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Discussion Topic: Dual Carbs & vapor lock -- page: 1 2

supereal

04-28-2013 @ 12:58 PM

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I don't know why they would call it a "filter", as it seems to be too small to be effective. When we bought our first one, I figured it was a filter of some kind, but upon checking further, it functions as a one way check valve. I assumed it was to make the pump more efficient. They are good pumps, anyway. If, in fact, such a "filter" is required, it begs the question "why not include it"? In the new C&G 57-72 catalog, it specifically shows it as "electric fuel pump replacement filter", but goes on to say it only fits the 12 volt pump.

This message was edited by supereal on 4-28-13 @ 1:04 PM

Old Henry

04-28-2013 @ 12:11 PM

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"That thing at the rear of the Airtex pump is a check valve."

Funny you should say that because that's exactly what I thought and said until someone told me different and I saw that device sold seperately as a filter. I think the instructions to the pump even say that the warranty is void if the filter is not used in front of the pump.

We lives and we learns.

Old Henry
(The older I get, the better old looks.)

This message was edited by Old Henry on 4-28-13 @ 12:13 PM

supereal

04-27-2013 @ 8:53 PM

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That thing at the rear of the Airtex pump is a check valve. It comes with the pumps we have bought from C&G. They may have changed the pumps since our last purchase, as they now offer a separate filter. It is always good practice to put an inline filter between the pump and the tank, in any case.

This message was edited by supereal on 4-28-13 @ 10:47 AM

joe b

04-27-2013 @ 6:24 AM

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Nelson I meant to get rid of the plastic lines. They are just asking for trouble.As an aside, back in the '60's,when we were all cruising we had some cops on motorcycles called "The Flying Squadron" who would pull us over on Saturday night and check the car. Two things they looked for in particular was proper bumper height and plastic fuel lines. Plastic lines got you towed to the impound lot.Under hood fires from these was quite common.

Old Henry

04-25-2013 @ 8:52 PM

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C&G sells the same Airtex pumps I was talking about but for $10.00 more for just the pump without the filter then you have to buy the filter seperate for another $10.00. So, $20.00 more than you can get them on ebay.

Old Henry
(The older I get, the better old looks.)

supereal

04-25-2013 @ 2:52 PM

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We use the inline electric pumps sold by C&G. They allow flow thru so the mechanical pump can be used without the booster. The proper fuel line is the copper coated line. C&G sells the complete line with fittings included. The original 1/4 inch line is just big enough, and any blockage mimics the fabled "vapor lock". The ethanol in today's gas both allows moisture to attack voids in the copper coated steel, and dissolves crud in the tank that blocks flow.

Old Henry

04-25-2013 @ 1:07 PM

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The problem with the Carter pump is that it does not allow flow through by the mechanical pump when the electric pump is not on. Most that need that feature use the Airtex. But, even the Airtex 2.5-4 psi pump exceeds the 3.5 psi limit of the carb float valve so I had to add a holly pressure regulator to keep from flooding the carburetor bowl.

If the electric pump is just used momentarily to prime the electric pump when it's vapor locked the pressure regulator probably would not be needed. But, any continuous use it would.

Airtex E8011 for 6 volt available here: http://www.ebay.com/itm/6-VOLT-FUEL-PUMP-LOW-PRESSURE-PRIMER-PUMP-OR-FUEL-PUMP-2-5psi-4psi-25gph-30gph-/310638236668?pt=Vintage_Car_Truck_Parts_Accessories&hash=item48537b53fc&vxp=mtr#ht_1131wt_919

Airtex E8016 for 12 volt here: http://www.ebay.com/itm/UNIVERSAL-ELECTRIC-FUEL-PUMP-2-5psi-4psi-INLINE-EXTERNAL-30gph-12v-AIRTEX-E8016s-/230958427823?pt=Motors_Car_Truck_Parts_Accessories&hash=item35c631eeaf&vxp=mtr#ht_446wt_986

Holley pressure regulator here: http://macsautoparts.com/early-v8-ford-mercury-fuel-pump-pressure-regulator-holley-1-4-psi-3-8quot-npt-ford-9500-reg/camid/F30/cp/JS0R3CHL1140518/

Photo of my pump installation attached.

Old Henry
(The older I get, the better old looks.)

nelsonford

04-25-2013 @ 11:18 AM

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OH
Thats not a bad idea adding an electric pump. What make did you buy...I understand you dont need a pressure gauge with Carter In-line pump 2-4 lbs?

nelsonford

04-25-2013 @ 11:01 AM

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Joe B
Did you mean change them keeping them plastic or to steel?

supereal

04-25-2013 @ 9:44 AM

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I went thru that whole thing OH. As the problem got progressively worse, I decided to check the only part of the fuel system that I hadn't tackled: the fuel line between the tank and the firewall. I found it to be almost completely blocked with dirt and rust. What fuel did get thru seemed adequate, but on a heavy pull, it wasn't. My electric pump would smooth out the bucking, etc, until there was no more room in the line. Twenty bucks for a new line finally fixed it.

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