Preparing to rewire the 1940 Ford pickup I am building and noticed that the ignition resistor is missing on the breaker assembly board. (Two wires hanging.) I've read that the ballast resistor should be 1.5 ohms, but I see in the Macs catalog that their 32-48 ignition coil resistor is listed as 40 ohms. Any Barners know what the proper ohms should be? Thanks.
Ignition resistor
- Thread starter Kentf1003
- Start date
George/Maine
Well-known member
I see macs has that 40 ohms but think its wrong.
.4 would be more correct. Say 3 amps x.4=1.2 volts leaving 5.8 at coil +or-
Ford used a .5 ohm resister.
1.5 ohms more for 12 volts if you used that one your coil voltage would be to low.
.4 would be more correct. Say 3 amps x.4=1.2 volts leaving 5.8 at coil +or-
Ford used a .5 ohm resister.
1.5 ohms more for 12 volts if you used that one your coil voltage would be to low.
Kurt in NJ
Well-known member
Before you buy a reproduction ask if it is on a ceramic core like original ---or on a bamboo core ---I recently worked on a car ,the owner said it had a new resistor, ran for a few min, then it smelled like a 3rd world trash fire---the bamboo was burning, then the resistor went open