need help with 51 pontiac chieftain

buddy of mine found a barn find, a 1951 pontiac chieftain deluxe (not sure what trim, but loaded out!!!). the gas tank was out and the fuel pump was said to have quit working. he reinstalled the tank, and hooked a electronic pump up to it and it runs....he did new cap, rotor, wires and plugs.....sooooooo now my mother in law bought it.....over the weekend we rebuilt the carb and still having small issue.

1951 pontiac chieftain, straight 8, 2 barrel carter, 6 volt system, all original!!!!!

first start of the day, kick choke on, turn key and push button, fires up like brand new car!!! drives wonderful....temp comes up nice, but of course, sitting at idle no or barely charge due to generator. so take off down the road and it barely shows charging....even at 50 mph...its just barely showing charge. get to point b and kill it, wont restart, turns over really really slow...turns over though, but wont start until cools off????? theres my issue...

my first thoughts..elec. fuel pump is sucking to much power (its wired in by battery and coil, i hate that). not enough juice to start? not enough fire to start with it being hooked to coil? carb still messed up?

any and all opinions on things to check will be greatly appreciated please!!!!

thanks in advance

 

still doing some research....looks like others have wired in a 12v pump on a 6v system no problem...maybe need to change the way its hooked up? but either way, do i need a regulator on this thing, maybe im just pumping way to much gas and drowning it out!!!!

 

entirely dependent on what your fuel pump is putting out. why don't you just rebuild the mechanical pump?

 

looking into that as well....as soon as i find a kit....

 

To me it sounds like you have a handful of issues. First and foremost is your generator is not putting enough out to keep the battery fully charged. After you drive the vehicle and the starter motor gets hot, you have whats called "heat soak" and the starter will take considerably more power to get it to spin fast enough to start the engine. Rebuild the generator, replace those ancient crusty battery cables with the heaviest wire you can find, make sure the battery is in top condition and see if that doesnt make a difference. It doesnt really sound like your fuel pumpbis at fault here, as the amount of power it draws is quite small compared to what your starter will need. Get the charging/starting system working as it is designed to and then start chasing down any other demons.

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