electric fuel pump questions

[Mikeswagon]

wondered if we can fix some updated knowledge about electric fuel pumps in one thread, i found it quite hard to search on this. While rebuilding my fuel tank assembly some questions occured to me:

what fuel pressure is suitable for a carburator?

is there an intank fuel pump conversion that fits right in?

Does it make sense to think on at all?

Thanks Michael

[3rdelement]

edelbrock 1406 likes 5 psi

i went with an external unit, just incase it dies on the road, i can easily replace it.

[710 Burner]

4-7psi is typical of carbureted applications.
I do not personally like my fuel pump in the tank because it has an electric motor attached to it, and electrical things eventually fail. Proper placement near the tank is all that is needed. But if you are set on that course, look at Summit Racing.

[kill-billy]

good thread topic.

if i may ad a question to the conversation,

should a regulator be installed when using an electric fuel pump?

the one im running says 4-7 psi or something like that and was wondering if it should be set specifically to 4 or 5psi.

[Kenall]

i run carter 6 pounders.

[jeepfan93]

The parts store MR. Gasket electric pumps won't go over 7PSI. No need for any regulator. If you go with a better unit, Facet or Holley then yes you must run a regulator. Most carbs want between 4-7PSI. I prefer the external pumps myself, even though getting the sending unit out is relatively easy, it just makes more sense

[Heavy_Metal_Thunder_81]

Holley Red Top. Made specifically for carbs, no regulator needed. Great pumps and rebuildable when they eventually wear out.

[rreed]

My truck had a Holley 2V on it w/ its current no-name, generic electric pump on the frame rail (where you want it so you when it goes south you don't have to drop the tank) when I got it and was running it w/ no regulator and no return line. Just electric pump straight into the carb w/ no issues.

I swapped the bad motor (unrelated to this topic) for another w/ a 4V intake and swapped on an Edelbarf 1405 I had laying on a shelf. While at it I installed a stock fuel filter and used the return line (no reason, just did) and it's been fine. I picked up a spare 4-7 psi generic off the peg board at Autozone to keep on board just in case this whatever is in it craps out.

So anyways, if your pump is 4-7 psi you should be fine.

[Rich88]

I installed one of these on the cross member above the axle. No regulator needed. Works fine. Don't forget to add a clear in-line filter between the tank and the pump.

http://www.jegs.com/i/Carter/180/P45...oductId=748050

Do not get the solenoid type unless you enjoy an annoying ticking or rapping sound. This type only "whirs".

[asphaltrockdweller]

Originally Posted by jeepfan93

The parts store MR. Gasket electric pumps won't go over 7PSI. No need for any regulator. If you go with a better unit, Facet or Holley then yes you must run a regulator. Most carbs want between 4-7PSI. I prefer the external pumps myself, even though getting the sending unit out is relatively easy, it just makes more sense

Actually the Purolator-Facet pumps come in a wide variety of different PSI's

You DO NOT need a regulator with the "cube" pumps.

I know, I have them on both of my 76 waggy's.
Don't waste your money on the MR Gasket brand you see at vatozone, and all the other big parts houses.

NAPA, and Auto Quest sell the Facet pumps.
Auto Quest parts houses run specials on them all the time, as they are VERY popular with the farming crowd.
OH!
Lots of Porsche people run them on dual Webber set ups as well, (I do!)
But with Webber's we do need to run regulators(different beast).
Not to mention their pumps are still made in the good Ol' USA

[Tinkerjeep]

Originally Posted by asphaltrockdweller

Don't waste your money on the MR Gasket brand you see at vatozone, and all the other big parts houses.

So what's wrong with the Mr. Gasket pumps?

[jeepfan93]

Even though they say 4-7 PSI, I bought one, and only got just under 4 PSI according to my gauge. Returned it for another one and just over 4 returned it and guess what, just over 4. Truck seems to be ok, but feels like more could be had. But it is much quieter. I only went that route because the Facet is loud and "clicky". I'm liking that Carter though, may order on up.

[710 Burner]

What are you measuring your pressure with?

[rreed]

Mine has the "cube" pump on it, looks like a small electrical transformer w/ barb fittings on each end. I don't know anything about it other than that. When the truck's been sitting a while and I turn the key to let it prime up a bit, it does give a loud "B-D-D-D-D-D-D-D-D-D!!!!" until it gets fuel back up to the carb then settles down into a low murmor "mmmmm..." Stop laughing.

Yep, I picked up the Mr. Gasket off the peg board as my on-board spare. I haven't tested it yet but have had it in the tool box for 3-4 months now so may be hard to take it back. I looked into the Holley pumps and I know everyone says they're great but I laughed heartily at the price tag.

I will also say I've only once just briefly gotten my 360 w/ Edelbarf 1405 up to about 4K RPMs just once, other than that it rarely sees 3K RPMs.

[jeepfan93]

Fuel pressure gauge/ vacuum gauge

[710 Burner]

Where did you attach it?

[Rich88]

Originally Posted by rreed

it does give a loud "B-D-D-D-D-D-D-D-D-D!!!!" until it gets fuel back up to the carb then settles down into a low murmor "mmmmm..." Stop laughing.

That's why a rotary vane type is recommended. It only hums or whirs. The noise you're hearing is a solenoid banging away as it moves a diaphgram.

[asphaltrockdweller]

I actually like the load bbdddddddd noise.

It tells me when I am running out of gas!

On why not the MR Gaskey pump?

I was at an O Really's a while back, and asked if they had the Facet pumps there?
The computer desk kinda guy said no, but said they had that MR Gaskey pump.

I said no thanks they are made in china, and don't last very long.

He said yeah they get defective ones back all of the time?

[jeepfan93]

Originally Posted by 710 Burner

Where did you attach it?

On the fuel line Actually after the filter where the fuel line attaches to the carb.

[Tinkerjeep]

Reason I ask about the MR. Gasket pump is I bought two. One is a "42s" model, the other a "12s" model. one claims 4-7 psi, the other 2-3(ish) psi. I didn't notice the difference on the packages (bought them months apart at OReilly's from same shelf and they cost exactly the same) until later, after I had installed each on one of my Jeeps. The higher pressure one is on the green J2010, the lower pressure one is on my 81 Cherokee. The Cherokee didn't seem to have the umph it used to have with the old, worn-out mechanical pump though. Maybe not enough fuel volume?

The green truck seemed to run fine, though the tranny was on its last legs so its hard to tell exactly.

Both Mr. Gasket pumps cost about $50. Both of them hum, no "B-D-D-D-D-D..."

My J4X has an old electric "clacky" type of solenoid pump, I pulled it off a parts Wag years ago, its always worked, though I'm wondering for how much longer. I love the electric fuel pump function, because it eliminates the need to crank a cold engine over w/ a mechanical pump just to get fuel from the tank to the carb when its below freezing -that wears the battery down alot...the electric pump, not so much. So I won't go back to mechanical fuel pump again...esp when the last Carter pump squeaked, was loose out of the box and it wouldn't fit right under the Power Steering Bracket.

So -Big QUESTION: Is there another electric, inline, external pump that is in the $50 to $70 price range that is rated for 5.5psi and isn't Chi-crap?