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Hello everyone, just completed a rebuild of the original 460 in a 1977 Ford F250 Ranger Extended Cab Camper Special. The mechanical fuel pump doesn't seem to deliver enough fuel to the new carb, so we installed an electronic external fuel pump (Summit G3136-1) and it does what its suppose to and the engine runs great. But I am disappointed in how extremely loud this pump is. Disapointed because it distracts from the new magna flow exhaust we installed.
Does anyone have any advice, or can recommend the quietest external fuel pump. Mounting within the tank not feasible and there are two tanks, 1 main in the rear and one aux side mounted tank, so the pump unit is mounted on the frame forward of the switch valve about midway under the truck.
I tried that same Summit pump, and a Holley pump. Both were annoyingly loud. The Holley failed, and that's when I figured out that my tank wasn't venting, which is what made me think the mechanical pump wasn't working. Once I got the tank vent squared away, I've been on a stock mechanical pump since. I don't know of any external electric pump that isn't loud.
I put one of the Holley mini pumps in one truck and it isn't terrible once it is fully primed. I'm wondering if you have yours a little too far away from the tank.
If I was you the first thing I'd do is check all up and down the fuel line for a possible pinhole leak that is sucking in air. Really the mechanical pump is all you should need.
That pump will probably fail because of where you have it mounted. The pump manufacturers want the pumps mounted below the fuel pickup in the tank. They are not good at lifting fuel and work better when fed. They're pusher pumps. They can cavitate and run hot from a lack of cooling. Ask me how I know. The old fashion rotary vane pumps seem to hold up better. The gerotor pumps seem to be more sensitive to ware from fuel starvation. The older Ford V8s suffered from vapor lock, and the best fix is install that pump in the tank with a return line. I didn't say easiest. I'm wanting to install an electric pump on my Bronco and put it in the tank. Maybe you install the setup from a later model fuel injected truck. They had duel tanks with in tank pumps. Just offering thoughts. That's a very nice truck.
Nice looking truck for sure. Unless you have a 460 that is bored out to a 572 and you are running duel Holley double pumpers the mech pump should be fine. I also agree that as long as the fuel tank/vent and valve system is all correct the stock mechanical fuel pump should be enough. Ck thinks like the rear sending unit (metal part at the sending unit mount plate) hose size and what size in line fuel filters you are running. Also depends on how you mount it the elce pump.
"How can I make my electric fuel pump quieter? There is still lots of noise. If you build a bracket and bolt on 2 strips of corded rubber ( i. e.) fuel line,cut tire sidewall. Suspend the pump in air with the rubber and use rubber fuel lines on the pump at least 12" long. Most of the noise will be gone."
But if you just have to run one check out a Walbro pump. I have read a lot that says they are the quietest pump on the market. https://walbrofuelpumps.com/
Or check out a Facet/Purolator pumps from Napa. They are quiet, and work well.Also check out this elec pump wiring up advice. Electric Fuel Pump: How to Do It Right
So while I was thinking about your problem, I figured out a fix for mine. I talked to Bronco Graveyard, and it looks I'll be able use a later year tank fitted with an in tank pump. It'll all bolt right in. All I have to do is wire it up run a return fuel line with a regulator. Not the cheapest way out, but a sure fix. I'll have plenty of fuel for later mods, and fix that pesky vapor lock problem.
Carter P4600. Pulls just fine out of the top of the tank and has 4.5 stars for 70 reviews on Summit. Thread below is from earlier today. It has rubber isolators and is as quiet as any electric fuel pump I have had.
Ditto on the Carter, have two installed in parallel. If one fails I can simply flip a switch. Forget the Walbro, they are what I call grunt pumps aren't capable of high flow and they can get hot causing vapor lock. It's almost impossible to safely mount a fuel pump lower than the bottom of the tank ( I have the 36 gallon model) but as low and as close to it as possible is good.
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