electic pump

[bobsmanstuff]

On my 53 flathead if I run an electric fuel pump off a toggle switch just long enough to prime the carburator and shut it off, do I need a pressure gauge?
Thanks

[Lawson Cox]

No pressure gauge needed for your stated purpose.

[cadillac512]

No, as long as you just prime with it no problem even if the pressure is a bit higher than it should be.

[RKS.PA]

I have a similar setup on my '47. I can hear the pump sound change as it fills the carb. bowl. That's when I shut it off and hit the starter. Think the fuel pressure gauge would just be in the way, but depending on how you plumb it, it might function as a vapor lock warning???

[51504bat]

Run an electric with a toggle on the 8ba in my '39 p/u. No pressure gauge but I do run a pressure regulator. The set up works like a charm for the times the truck sits for more than a week. Hit the switch listen to the pump start to slow down and shut it off. Pull the choke, 2 pumps on the gas pedal, hit the key and instant start.

[bobsmanstuff]

Sponsored Links (Register now to hide all advertisements)

Do I run one wire to directly to the battery and one from the battery to the toggle switch?

[51504bat]

I used a fused power source that is only hot when the key is on. Connect that to one side of the toggle switch and the other lead goes to the pump.

[Lanny]

Originally Posted by bobsmanstuff

Do I run one wire to directly to the battery and one from the battery to the toggle switch?

I just was posting about a fuse, then I looked and seen it was just done.



.

[bobsmanstuff]

Thanks everyone.

[36coupe]

Maybe use a momentary switch that go to off when released. Like a starter button.

[Graeme / New Zealand]

Originally Posted by 36coupe

Maybe use a momentary switch that go to off when released. Like a starter button.

Yes that's what I have. It is fused and takes the hot point off the ingnition switch so only works when ignition is on. I found an existing hole on the drivers side in the bottom edge of the dash and placed it there ( spring back mini toggle). it cant be seen unless you stand on your head.

GB

[blucar]

C & G Early Ford Parts in Escondido, CA sells a very good 6v electric pump that has the correct pressure for a 6v system, mount the pump as close to the tank as possible, electric pumps push better than they pull.
An electric pump will push through a stock mechanical pump with no difficulty, great to break through a vapor lock or to aid in starting an engine that has been sitting for several weeks.
My '36 Ford has had an aux electric pump on it since 1952... A real live saver on many occasions.
DO NOT TRY TO GO CHEAP, HARVESTING AN ELECTRIC PUMP OF OF A FUEL INJECTED LATE MODEL VEHICLE, A SURE WAY TO BURN YOUR CAR UP. LATE MODEL PUMPS ARE DESIGNED TO RECIRCULATE THE FUEL BACK TO THE TANK.
I had my 39 conv in a shop to have some work done on it. I mentions to the mechanic that the electric pump that was put on the car did not work, it would run but did not pump any fuel to the car. While the car was on the hoist we looked at the pump, the idiot that had installed it had put a loop in the line that returned the fuel to the tank in lieu of to the carb.
Could be he did not know the engine had a carb in lieu of injection.

[Newc]

I just bought a '32 that was Overprimed and caught fire in the owners garage. Electric pump! Newc

[corvette8n]

Mines on a spring loaded toggle switch, I hold it on until the sound of the pump changes then I know the bowl is full. I mounted the switch in the bottom lip of the dash to the left of the column.

[Steve in Denver]

Great to have a momentary switch, but you will like having it on all the time on hot days when it tries to vapor lock. I run mine on an As Needed basis. I do have a regulator on it.

[flatford8]

I understand wanting to overcome vaporlock , pulling a hill on a hot day or caught in traffic. My area isn’t that hot so I haven’t had that issue. What I don’t understand is wanting the engine start instantly after it has been sitting. What’s wrong with it cranking a few seconds to start building oil pressure first?…….Mark

[blucar]

There is nothing wrong with letting an engine crank over for a minute or two, maybe in short intervals to get the oil moving, however a 6v system does not have much reserve power. therefore the cranking speed is slower the longer the engine is cranked over.
Like everything in life, one must use good common sense with everything they do.

[bobsmanstuff]

Thanks for all your help. It's appreciated.

[Anteek29]

Originally Posted by flatford8

I understand wanting to overcome vaporlock , pulling a hill on a hot day or caught in traffic. My area isn’t that hot so I haven’t had that issue. What I don’t understand is wanting the engine start instantly after it has been sitting. What’s wrong with it cranking a few seconds to start building oil pressure first?…….Mark

I tend to agree with cranking a few seconds. With an Optima battery you have LOTS of reserve.