Is there anything I should be aware of hooking up 12v to start up my 41 with the current points? Any change in gap or any other changes needed? I'm using a 12v coil with a ballast resistor - maybe, I say that because I know at least on my 55 when starting it byp***es the resistor when cranking using the r terminal instead of the s on the solenoid. But on my 41 it doesn't use a electrical solenoid, it's mechanical. The ignition is turned on than a foot feed arm to the starter engages the starter. So do I need to have the ballast always used than since I can't byp*** it unless I would put in another switch? I guess the car starts on 6v anyway just wondering what to do here.
Your 6V points should be OK. 6v wiring and switches are actually more heavy duty than 12V as they are designed to handle higher current. 12V systems only draw half the current. ( Ohm's Law)
Points don't know or have voltage ratings. They will be fine. No change to gap or anything either. You are also right on your coil and ballast resistor.
On my `55 Ford tractor I used a relay. Get the current from the lug on the starter. The relay closes, byp***es the resistor, and gives 12 volts to the points. When the starter drops out the relay opens up and your back to the resistor. I have to start this tractor in the winter time that’s why I wanted the hotter spark. If your just using this in the summer only I'm sure you could get away with out it. The diode as mentioned in post #4 should work also.
The Jalopy Journal
