dart6
Well-Known Member
I've got one as well as a holley. Both noisy as
Electric fuel pump failure. Recommendation?
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Dan64
Member
Wiring is not my strong suit but 14 gauge wire most likely isn't what you want to use. I used a relay and 10 gauge. Take a quick measurement for the distance from the relay to the pump and determine what gauge wire you should be running. Mine is a Carter pump in a short bed truck.
I agree 100% that's the best place for it, but millions of vahicles came with frame rail mounted pumps and worked fine. The key is finding the right pump and giving it good mounting location that's gravity fed from the tank. But I know you know all that.
jimjimjimmy
lobsterman
The Walbro pumps can be mounted up to 3 feet above the tank not that one would do that but the Walbro pumps do suck .
tjpatte
Well-Known Member
My Walbro will pull fuel without being primed and’s been working for 8 years (not daily driver).
Can’t really complain about it, may one day get a new tank with in tank pump for the Gucci AN fittings
Can’t really complain about it, may one day get a new tank with in tank pump for the Gucci AN fittings
Sounds like I will have to look into the Walbro pump some more. These are all really good suggestions. 10 guage wire feels like it would be overkill for a tiny fuel pump, however I suppose over the distance from the front to the back of the car would create some resistance in the wire. So now I'm looking at a 10 guage wire and a walbro pump. This is all really good information y'all.
jimjimjimmy
lobsterman
make sure you also wire an inertia switch .
Don’t waste your money on a Holley. They make a ton of noise and they have issues.
Find a good used Mallory 140 and be done with it.
I think you can still buy them new if you don’t want a used pump.
The Mallory won’t leave you stranded.
You also need to run the pump from a relay.
As RRR said, the pump needs to be mounted in the rear as close to the tank as possible.
Use a relay to run the pump. It’s so important I said it twice.
jbc426
Well-Known Member
Are you powering it through a relay that's triggered by switched 12V? If not, that could be contributing to the problem.
It's relatively easy to install the pump inside the fuel tank, but you will also need a bypass regulator with a return line to the tank. Being submerged in the fuel helps keep pumps cooler. I used this method along with a surge tank on my '68 Barracuda convertible.
On my '70 'Cuda, I mounted the pump is mounted externally to the tank, but it was designed to be mounted either in or out. It was not cheap, but it is one of the few pumps rated to be able to lift fuel rather than having to be mounted below the tank.
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[1] I know more than one person that got stranded with a Mallory 140.
[2] I know of a person who replaced the Carter elec pump on his daily driver after 19 yrs. Not because it failed, but because the owner thought it had earned it's 'retirement'.
The Carter elec pump is the only one that I know of that has the fuel circulate through the elec motor section. This cools the motor & lubes the brgs. Unlike other brands, there is no seal [ which can & does fail ] between the motor & pump section.
[2] I know of a person who replaced the Carter elec pump on his daily driver after 19 yrs. Not because it failed, but because the owner thought it had earned it's 'retirement'.
The Carter elec pump is the only one that I know of that has the fuel circulate through the elec motor section. This cools the motor & lubes the brgs. Unlike other brands, there is no seal [ which can & does fail ] between the motor & pump section.
Must be a down under thing. I’ve been using them and their regulators since they came out.
I’ve never seen one fail.
famous bob
mopar misfit
on another note I`ve never had a Holley fail , still got an old used one that still works , on the bench ...
They got better. There are still annoying loud.
I had a Holley red fail, switched back to Carter. I should have stuck with Carter all along.
How long ago was that. The garbage of the mid 80’s until the late 1990’s was straight junk.
Mallory put a severe dent in the fuel pump market because they made **** and when the power levels started to climb the Holley pump started to show its weaknesses ao you had to run two of them.
It was a **** show because Holley was diametrically opposed to using a return line. With the he,p of two friends I started using a return line in 1984.
I blocked off the bypass in the pump, and ran a Hilborn -8 check valve set at 6 psi. It worked but its flaw was when I started making close to 600 hp the check valve couldn’t keep up. So I switched to mechanical fuel injection which was one of the dumbest mistakes of my life.
The 90's, before that I ran the DC recommended mechanical and electric.
90's
Yup. That was in the era of bad pumps.
I know one issue was the brushes were too hard for the commutator or the other way around.
I had a local place repair new pumps to correct that and something else that I forgot what it was.
Then they were reliable.
When the Mallory stuff came out it made all that cockarocka obsolete.
I didn't know Mallory made pumps until you mentioned it awhile back.
The next time I'm in need I'll take a look at the Mallory.
I know. You know all the failures of Holley carbs and Mallory fuel pumps.
We all know that Carter is the best and never had a failure.
Got it. Move on.
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