BALLAST RESISTOR........WHAT GIVES?

HEI. There is one on here that insists on arguing. The HEI modules are capable of sort of "regulating" current on their own. "As an experiment" I ran my HEI conversion with NO heat sink other than being mounted to a flat area of the firewall up near the wiper motor. There "just happened" to be a screw hole right there where somone had anchored something, so I only had to make one more.

I ALSO experimentally used the FACTORY STOCK Mopar coil and it worked just fine. You get FAR better spark out of that combo than a stock Mopar box. I'm SURE that you would get even more with a proper "E" core coil

The ballast: So far as I know ALL US cars of the era used a ballast, and some of the foreign ones. IT JUST MIGHT BE that a big part of the reason was, that by using a resistor (supplying 11-12V when running with the system at 14V) Then they could get a nice hot start with the bypass during start---STILL supplying at least 10.5--11V or more

In the case of Mopars this is NOT just a resistor--it is a BALLAST which means that it attempts--thermally -- to increase current at low voltage and attempts to decrease current with higher voltage. AND the ballast action attempts to sort of stabilize the current over RPM range