I know this has been done to death. But I don’t understand why Flamethrower coil fails. Their tech support say DO NOT USE EXTERNAL resistor.
I have a 57 Tbird 312 running all stock. I do run an alternator. Output is about 14.28 volts. Holley 4160 4 barrel carb. I have pertronix ignitor 1 Module. The car runs well.
A few years I installed a Flamethrower coil without external ballast as per instructions and tech support. The Flamethrower has an internal resistor. The engine performance was much better. Better throttle response from a stop, hardly any exhaust fumes and clean plugs indicating a much better burn. The problem is the coil without the resistor gets very hot and fails. If I run it with ballast resistor it will last but defeats the purpose. Is there a voltage loss to the plugs when using a ballast resistor? If so how much.
I am currently using a MSD 45,000 V Blaster II with external resistor - again runs good but would probably get better performance without resistor.

The Brillman Company makes a coil EB30SS with 55,000 V that must be used with an external resistor maybe this is an option
Any suggestions or help appreciated.