Fuel Pump Selection

[bill_powell]

Hello Again All:

Went out to warm up the Midget yesterday (27 degrees...brrr), and she shut down after running only a minute or so.

No time to analyze until this morning. Spark plugs, perfect. Spark, perfect. Presence of fuel in filter, okay. Pull fuel line, zero pressure, no click from the electric fuel pump. A-Ha.

Looks like I'm needing a fuel pump. I found that the PO had installed a Mitzubishi pump of some sort. Interesting.

I would like recommendations for an off-the-shelf replacement from you all. Daily Driver, running a 1275 with a single HIF6, so I imagine 2 1/2 to 3 lbs pressure? Something from NAPA perhaps?

Your thoughts, as always, are appreciated...

Bill

 

[ChrisS]

For a quick and dirty replacement the Facet / Purolator cube pumps work. The low pressure version are FEP-42SV or newer version FEP-04SV

 

[GeeBee1]

If you go the facet route, put a rubber buffer between the mounts and the body.

Pat

 

[theleisure]

I like my Carter p4070 and I got it at NAPA. I'm running a Weber carb so wait for others to chime in on whether you can use that model too...

 

[HAN8L1965]

Napa's private label pump is a square Facet pump ask for the low pressure, works positive or negative ground.

Mark

 

[Glen_B]

I've got that very pump on three LBC drivers, soon to be four. No failures, good performance, good price.

Glen

 

[jlaird]

I have one as well on Miss Agatha.

 

[bill_powell]

Back in from the freezing garage.

Okay, the Purolator/Facet seems to be the ticket, and install it with rubber buffering.

However. Upon investigation, I realized I had blown a fuse. I know, I know, I should have looked there first. It's cold out, and I was cutting corners...

It is possible that a wiring fault blew the Mitzu pump (and the fuse), so I'll have to eliminate that as a cause first.

Is the Facet a single-wire install, or does it need power and ground leads run to it?

 

[Pythias]

One hot wire, run the other lead to ground. I've installed a Holley fuel regulator (with gauge) so that I can run ANY FACET pump, just in case they're out of the low pressure ones when and if mine fails.

 

[bill_powell]

Well, I definitely have a shorted-wire problem, which I will have to track down. Start on that tomorrow.

Meanwhile, I have been offered a Holley Blue elec fuel pump by a buddy; Worth a try? Have to pick up a fuel pressure regulator, as Pythias mentioned, I assume...

 

[Pythias]

Be sure to get a good one. The little circular kind sold by Mo#$ has been reported to be next to worthless. Holley has a 1# to 4# model (1135) and a 4# to 9#. That's too much.

 

[bill_powell]

Will do; I appreciate the input.

Think I'll go with a regulator in any event; seems like good insurance.

 

[texas_bugeye]

Be sure to get a good one. The little circular kind sold by Mo#$ has been reported to be next to worthless. Holley has a 1# to 4# model (1135) and a 4# to 9#. That's too much.

No they are completley worthless Spend a little money upfront and get a good one and a good gauge. Or save a boat load of cash and just get a facet pump.

 

[bill_powell]

No they are completley worthless Spend a little money upfront and get a good one and a good gauge. Or save a boat load of cash and just get a facet pump.

I will be following that advice; I must track down that rarest of the rare issue first...a small electrical gremlin...

 

[JamesWilson]

The Facet pump is good... gremlins aren't. I chase mine away, but they come back, particularly when it's dark and cold....

 

[Westfield_XI]

I don't understand why you would want to buy a pump that makes too much pressure and then put a restrictor/regulator into the circuit to get the correct pressure? Why not just get a Carter 4070 that makes the correct pressure in the first place? A quiet reliable high flow vane type pump suited for these cars.

 

[jvandyke]

I was thinking the same about the regulator, if you don't need it you don't want it. I had one go funny this season and cause fuel supply problems. If the pump is near the correct pressure I'd run without a regulator. Having said that, I replaced mine since I didn't know what the pump was supposed to put out and I had another regulator sitting there. Of course I figured out it was the regulator AFTER I moved the pump back by the tank, swapped in another one, went through all the filters, trying to figure out why fuel supply was so piddly. Too much pressure is bad, too little won't matter if the volume is still sufficient, right? 23gph at 2psi will feed the carbs fine as 12gph at 4psi. 1gph at 20psi would blow past the float needle. Not sure how volume and pressure relate to each other on fuel pumping.

 

[Pythias]

Agreed that using a regulator is not necessary IF you use the correct pressure pump.

BUT if/when you're a couple of hundred miles from home when your fuel pump fails, you can use ANY pump pressure that's on the shelf of ANY local NAPA store and be back on the road again. They don't ALWAYS have EVERY pump in stock. ..

Don't ask me how I know.

 

[bill_powell]

Quick question: the specs on the Carter P4070 show 4-6 PSI, internally regulated. Is that adjustable? I understood that my SU should run at 2 1/2 to 3 PSI?

 

[jlaird]

Yes 2 to 3 lbs pressure. ORiley has em.