Hot coil

[35 rancho]

Been driving around town at a normal speed and notice the coil is very hot to the touch?? The truck has a 12 volt system, new set of points, the coil is mounted to front head bolt. Got the drake conversion for tube coil on the helmet distributor. It's a 40 block with 100 amp alternator. I tried the coil with resistor inside and tried a coil with external resistor, same results. Thanks for any help!!

 

[BUBBAS IGNITION]

You need to measure the actual resistance of the coil ( and ballast resistor if used).
I have found that some of the 3-4 ohms internal coils do run a little hot.
A 1.5 coil would work fine with a external resistor of 1.5 etc as well.....

 

[Bruce Compton Canada]

I just went through the same problem and ended up making a new coil mount that bolted to the intake. The head mount transferred way too much heat, especially after the engine was shut down. Bruce

 

[G.M.]

Why don't you have an original coil for your distributor rebuilt by Skip and converted to 12 volt NEG ground. You will need a late 50, early 60s Ford resistor. G.M.