Can I hot shot a 6V Car with 12V if I use starter sparingly and have everything else off? It starts quickly.?

Question

Need to one-time start a 1950 Plymouth and don't want to buy a new 6V battery for this one occassion. I prime it with gas and it usually starts right away. Will make sure radio and lights are off. There is nothing else in the electrical system that worries me except the voltage regulator. Will I cook it?

Do I need to isolate the 12V battery in the other car by disconnecting cables for any reason?

If this won't work, is there any simple way to step down the voltage for a one-time deal?

Thanks!

Answer 1

Im not sure about your Plymoth we had a 49 chevy fleetline that we were swapping the engine and electronics over to 12v

A 12v battery in it allowed it to start however the voltage regulator clicked like mad.

I believe we started and drove this car about 30-40 times like that untill we dropped in the 350SB

Answer 2

No problem. A good safe idea would be to just set a 12 volt battery on the fender or where ever and connect it to the 6 volt one (neg. lead only) and have some one there to momentarily connect and then disconnect the 12 volt battery's positive lead from the 6 volt battery the instant the car starts.

Answer 3

Several years ago someone came up with the great idea of an eight volt battery. This is goning to be the best idea. You could mdke sure that the started is already ingaged when you introduce those 12 volts and get them gone as soon as the old girl fires off--voltage reg. is not on line during starting cycle.

Answer 4

If you have the old 6-volt battery try to have it charged at a shop or parts house first. IF your vehicle is a standard it should push start after you charge the old battery. If not able to do that then remove all fuses that are not needed for start up and then disconect the regulator. Hope this helps.

Answer 5

You can do it, just make sure all of the lights are off. The 12 volt battery can burn them out real quick.