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Old 11-06-2013, 11:20 AM
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electric fuel pump selection

I have a 1940 Ford with a stock small block Chevy. My second electric fuel pump has failed. It is a carter CRT-P4070 electric rotary vane. My first electric fuel pump was a bellows pump that failed due to alcohol in the fuel dissolving the bellows. I have not removed the Carter pump so I don't know why it failed. I need some recommended electric fuel pumps that hot rodders have found to be reliable. Thank you. tmmcnay@hotmail.com

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Old 11-06-2013, 11:24 AM
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If you're dead-heading the system with no return line, there is no pump on the planet that will hold up.
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Old 11-06-2013, 08:26 PM
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Quote:
Originally Posted by techinspector1 View Post
If you're dead-heading the system with no return line, there is no pump on the planet that will hold up.
Ditto this. Except I went through more than two pumps. Thank goodness for step-brothers who can just look at some mechanical problem, tell what's wrong, and tell how too fix it.
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Old 11-06-2013, 08:34 PM
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I just got a Mallory gere rotor pump. It a 4110 roughly the same as the Holley Blue. They have 2 smaller ones if you don't need the volumn.

Several of my cruize buddies use these and have no problems with them. It's probably best to use a return but Mallory said it was not necessary with this pump as long as I use a regulator. The pump is pre set to 7 psi

These pumps are dead quiet if you soft mount them and even hard mounted there is just a faint whisper of noise.

I should have my install done Sat.
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Old 11-07-2013, 03:31 AM
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It is very unusual of these Carter P4070 and P4694 electric pumps to fail. Remove it and see if it swallowed a bit of dirt.
If it did it is not that hard to clear it. (run it backwards). If this gets you going again clean out the entire fuel system including the gas tank. Install a good in line paper element fuel filter between the tank and the fuel pump.
Dirt is about the only thing that will stop these pumps. And dirt will stop any fuel pump.

These carter pumps run just fine in a dead head configuration.
Alcohol blended fuels 10% to 15% does not kill these pumps. But dirt will jam it up.
Alcohol blended fuels can tend to loosen up dirt and fuel deposits in the gas tank,
then this junk jams the pump. (ANY PUMP) Clean out the tank, use a good OEM style paper element fuel filter before the pump.
I bet you can un-jam that pump. I have done it before.
When you reinstall it be sure the pump is correctly grounded. The ground point will need periodic servicing like any ground point does.
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Old 11-07-2013, 08:30 AM
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I have a Carter lift pump on my Dodge diesel and it now has well over 200k on it. It probably is one of the early "campain" pumps that Carter relesed after the rash of early lift pump failures with the brown truck and Fed ex trucks who all used the same Cummins 24 valve diesel.

These are exactly the same as the hotrod pumps although the diesel guys hate them. Diesel fuel is not the cleanest fuel out there and typically there is only sock in the tank for a prefilter so dirt and moisture is probably the real problem.

I took my original pump apart after it failed and found that the relief valve had totally hammered the seat down to nothing and has simply come apart. Otheres have found that the motor coupling which is plastic had come apart.

These don't make much noise as mounted on the diesel block but I don't think a couple pound fuel pump is going to make a thousand pound chunk of cast iron move very much or very fast. haha
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Old 11-07-2013, 09:43 AM
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Make sure you have at least a 10 micron filter ahead of your electric pump! Without a filter the contaminants in gas, or your tank will damage the electric pump. I have no return line or bypass on either of mine, and they haven't failed me, but I do have a good filter ahead of them to protect them.
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