Enough's enough with this crappy fuel we have today. I am not running my cars for one more season having to prime the carbs by hand anymore.
School me on electic pumps, I would like to install an electric fuel pump in both cars just to prime the darn carbs after sitting. I would just as soon keep the mechanical pumps for when the cars are actually running as I don't need the electric pump noise.
Will the electric pump push fuel through the mechanical pump when the engine is not running?
The way I see it I can mount the electric pump parrallel to the regular fuel line near the tank where it's supposed to be or in parrallel to the mechanical pump but that's not where an electric pump is supposed to be. I plan on going parralel either at the back or the front with a check valve in the other line to prevent it pumping backwards back to the tank.

Sheldon

hi
yes a elect pump wll push fuel through a mech pump .

i have had mine that way for years .

drain holley change jets hit switch ad refill carb before starting engine .

1 problem in hot weather mech pump will sometimes not pull enough fuel through elec pump for climing steep grades or w o t operation in which case i flip the on switch and prob solved .

Something is wrong if you're having to prime the carb everytime you start your car. The carb should have gas in the fuel bowl without needing the pump to fill it each time. I can let my car sit for a month or more, and it fires right up with no choke, my setup is just a Carter street pump feeding a Holley double pumper. The question you should be asking is why is my carburetor empty and where is the fuel thats supposed to be in it going?

My 2-cents says you've got other problems. I wouldn't be suprised if you're dealing with a flooding issue, not lack of fuel (??).

I've run the holley red as a push thu to a carter mechanical pump for years.

Depending on you quality of fuel you will have evaporation problems. Ethanol is mandatory around here - Everyone told me it was my carb - I switched over to pure gas - ( Stromberg carb so it isn't something easy to just jet up) and all the problems went away.

I have used one of those cheap square Facet pumps just to prime or to help prevent vapor lock on very hot days and it worked fine.

Edelbrock has there own version. I was going to try one of those in the future.

I've had this problem with my Roadrunner when it had a 383 and now with a hemi. I would have to crank the engine for a very long time before it would start. I put a small electric fuel pump next to the tank and use it only to prime the carbs. It works like a charm. I then outsmarted myself, I added a vapor separator and 1/4" return line to look like a hemi setup. The electric pump only had enough pressure to run the fuel back to the tank through the return line. Pinched off the return line and now it works fine again. Don't forget you need a low pressure electic pump or you will blow out the carb seals.

a nice Carter 4070 series pump would be the ticket for this. 6psi with plenty of flow. the down side is if there is an issue with the diaphragm in the mechanical pump you flood your oil with fuel without knowing it....

It will work fine but you do not have to run parallel lines. I have a Holley electric back by the tank and it pushes through the mechanical just fine. I have both a manual switch under the dash for priming and the like and a micro switch that is actuated by the secondaries on the carb.

That way, I don't have to listen to the electric pump all the time, but have the flow when I need it. This system has fed the Dominator on the street and track for years now.

I looked at doing this and using a 5 second relay: ignition on, 5 seconds of priming, pump off, start engine, ignition off, ignition on, 5 seconds of priming, pump off, start engine...but the relays are 40 dollars each. Tim

I have found using a stock enclosed air filter housing has slowed the evaporation of the fuel in my carb verses a open air, air filter.

I did this exact same thing a few years ago. At some point I even posted all the part numbers for all the fitting and check valve I used for a really compact arrangement. I have mine tucked up in the axle tunnel and it works great. Just switch on for 15-20 seconds and both carbs prime up. Pump gas pedal to set the choke and it fires right up.

Thanks for the help guys, there's absolutely nothing wrong with the car just the modern fuel. I have a new small 72GPH Carter but I may buy a 110GPH one instead, I don't want to starve the 528 at WOT. It has the Race Carter mechanical on there with a regulator.
My 472 has a stock Hemi Carter mechanical with of course no regulator. I can prime it without too much trouble through the stock vent tubes but the AVS's under the shaker on the 528 are not so easy and I'll rig it out first and see how happy I am with it.

Sheldon

Electric push through mechanical works for me ('47 Power Wagon). The stock fuel system was prone to vapor lock while running in hotter temps with today's fuel. Hot re-start not possible unless the fuel pump and nearby line was hosed down with cool water. Cold start after sitting required long crank times.

An auxiliary electric pump on a toggle switch mounted to the frame rail near the tank fixed all the above. It is a carb type electric pump set up with a bypass check valve so the engine mounted pump can draw fuel with electric pump off. The check valve is a 3/8" brass version from the hardware store. Other types are available.

Tests include 1) Run down the road in hot weather until she sputters and looses power. Turn electric pump on and smoothes right out 2) Hot re-start. Starts up quickly with electric pump on. Will not re-start with electric pump off. 3) start after sitting weeks or even months. Starts up promptly with electric pump on. Not so with pump off. Lots of cranking.

I kept the original fuel pump because it has integral filter, also since it is original style and because it is reliable in cooler weather.

Please let me know what you come up with. I have a similar setup, 528", dual quads, shaker, not easy to prime the carbs and want to do something with an electric pump.