When I got this car somone had put an electric fuel pump on it. I changed it back to the vacum and plumed it to the intake, I gat this idea from another web site and an old picture of the car that shows it that way. I tryed puming it to the oil pump and it ran out of gas and I lost my prime on the oil pump. So I went back the way I had it. My concern is long hill climes. I have driven the car about 200 miels this way but it's just been around local. I want to have a constant vacum sorse.
Some American Motors vehicles in the 'sixties with vacuum wipers had a vacuum accumulator - essentially a sealed tank with inlet and outlet valves that was plumbed into the intake manifold, and the wipers were plumbed into it. Thus, when the engine vacuum dropped, the residual low pressure in the tank was sufficient to keep the wipers operating until engine vacuum picked up again. This worked well for relatively short periods of time. It might work for you if you are not planning on climbing mountain passes. Obviously, the bigger the tank the longer you can run with low engine vacuum.
Thanks, Good idea. One thing I didn't explan, This is an early 30u, But it has a pb block in it. It's still thremo cooled and has vacume fuel pump. I was talking about this on another site, and they found that intresting. What i am getting at would that be causing the probem with the oil pump. The car runs great like it is. I am just trying to make it more original.
Doug, you can hide a vacuum accumulator tank anywhere there is room, and I don't see why it won't work with fuel supply vacuum tank. I like to keep a vehicle original too, but I'm not above hiding, and using, a more modern item that will improve reliability and/or safety. In terms of the vacuum fuel pump, I plan on using a completely unserviceable one, gutting it, and running a fuel line straight through it to the carb. Fuel pumping will be by way of an old Autopulse 6V electric pump mounted right next to the fuel tank. Of course, I don't intend to enter any competitions where total originality is a criterion.
I havea Carter 6v vain pump under the body, I can prime my vacume pump with or with just moving the fuel line go straght to the carb. I don't have a problem with the accumalator. I'm just trying to figuar out this oil pump.
I have been running electric fuel pumps for over fifty years as a backup for the mechanical pump to aid in starting and/or eliminating vapor locks. In the last few years I have seen a very high failure rate on all of the electric pumps I have, Autopulse, etc., as a result of the new formula's/compounds used in gasoline. I have also seen a lot of failures in the mechanical pumps.
If you are going to use an electric fuel pump make sure it is compatable with the new unleaded fuels. I have found that the rotory pumps work best....Bill