The original unit, the Ignitor, is basically a replacement for points, NOT a high energy ignition. They are NOT recommended by the manufacturer for driving low impedence, high-output coils. They provide a level of spark much like the points they replace, but never "wear", "burn", or need adjusting to keep performance at a peak level.
HOWEVER, if the engine stalls at a point where the module is "triggered" (much like points being closed), the modules are too dumb to shut off, and will sit there and get hotter and hotter (along with the coil), 'til the battery is dead.
Sometimes, when this happens, the $moke gets let out of the module and/or the coil.
Pertronix has come out with the Ignitor II module for POPULAR applications. That unit will drive a HIGH output coil, and is SMART, shutting off coil current when the engine is not running/ turning over. The module controls dwell, based on engine speed.
An advantage EITHER unit has over points is that the Ignitors are less affected by distributor bushing/shaft wear/cam wobble than breaker points.
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Today's Featured Article - Chores - by Frank Young. The ceaseless passing of time! It is at once our friend and our enemy. It measures our progress and it makes us old. Like most features of our life, few things are all good or all bad, and most such judgments depend on our own perspective or viewpoint. In our particular hobby, we enjoy the nostalgic return to the days of our youth as we recreate many of the scenes that took place on the family farm that served as the stage for the first few acts of the play that is our live
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