The things I learn

[Deleted User]
edited November -1 in HUDSON
While waiting to rebuild my manual fuel pump I decided to hook up the electric with the bypass so I can keep driving the Hash. In the process I mounted the pump to the frame with the provided bracket and discovered that the unibody transmits a heck of a lot of noise to the interior of the car, that electric pump just keeps a pounding with the bypass letting fuel circulate. I think I will have to come up with a rubber mount of some kind to isolate the pump from the frame. Of course it is a motivation to finish the manual pump, just so I can shut off the electric. To dump the excess fuel in the tank I pulled the filler neck and drilled and tapped it for 1/8th inch pipe then after putting the neck back in the car put in a hose barb. With the .030 restriction there can't be more than drops going back to the tank anyway.



Harry

Comments

  • Hi Harry,

    One way I have found that works well to dampen the noise from an electric fuel pump is to use some extra center drive shaft cushions from a stepdown as isolators between the mounting bracket, and frame.

    The best suggestion I can offer is to switch to a Carter Rotary Vain electric fuel pump.

    These aren't inexpensive, but when running, they make very little noise as they don't have that darned solenoid in there banging away. These units will outlast any soleniod pump on the market as well. These pumps are made to use as a primary pump, and not as a booster, so you will need to get a blockoff plate eliminate the mechanical pump (and a big source of vapor lock problems). Be sure to mount the unit as close to the fuel tank as possible, and try to keep it as far from the exhaust as you can. I used one of these for over 15,000 miles on the 46 Hudson truck I had, and currently we are running one on 53Jetman's Super Jet. They work fantastic! I'll never use one of the old style soleniod electric pumps again. Here are a couple links: http://www.federal-mogul.com/en/AftermarketSolutions/NorthAmerica/EngineSolutions/Products/CarterFuelDelivery/CarterElectricFuelPumps/RotaryVane/



    http://store.summitracing.com/partdetail.asp?autofilter=1&part=CRT%2DP4259&N=700+4294839053+400415+4294836965+4294891680+115&autoview=sku



    Just included the Summit Racing link, as I knew they have stocked these in 6 Volt in the past. Am sure that any parts store that handles Carter/Federal Mogul brands can get them as well.

    Hope this is a help to you.



    Essexly,

    Dave
  • Dave, I have one of those pumps but I'm not sure if it pumps, I guess I'll find out. Mine is probably as old as my Hudson but if they are still making them they probably have the gaskets in case mine leaks. I know this knocking pump I have now is driving me crazy. I never heard it when it was in the engine compartment but on the frame it is just pounding away.



    Thanks for the suggestion,

    Harry
  • Park_W
    Park_W Senior Contributor
    Harry, before you power up that old Carter pump, open it up and be sure the rotor turns freely. After my Hornet had been off the road for three years, I switched on the pump and it promptly burned out the motor. Fuel gum had totally frozen the rotor, and the unit couldn't stand a stalled-out motor.
  • Thanks Park, I will do that. About 8 years or so ago I put this pump on my 29 DB pickup but it put out too much pressure for the updraft carb so I took it off and fixed the vacuum tank. I home today getting over a virus one of my customers decided to share with me. Walked right up and coughed in my face,never even tried to cover his mouth or apologize, then got offended when I called him a rude knucklehead. At least I can work on fuel pumps today.



    Harry
  • I decided to hang the electric pump from a heavy rubber strap and that silenced it greatly. I think I can do more to keep the noise out of the cabin with a little more hard point isolation. Thanks for all the suggestions. I decided to not use the vane type pump as I was told if it is off fuel won't pass through it and that defeats the purpose of using the electric as just a back up to the manual pump.



    Harry
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