I don't have a number, but the "Ignitor" has LOTS of dwell, I'm gonna speculate MORE than a properly set breaker points. Outside of a VERY short period of time when the spark is occuring the electronic switch is "closed", and the coil is heating.
That's why when you leave the ignition switch "ON" with a Pertronix Ignitor, it is VERY likely it will be in "ON" mode, trying to overheat itself and the coil, and killing the battery. The only way it shuts down is if the engine has stopped EXACTLY at a firing point of one of the cylinders.
On the other hand, the Pertronix II and III units (not available for all applications) control dwell to lessen coil heating during operation and allow the use of lower impedance ("hotter") coils, and shut off coil current if the engine is not rotating. You can read about the dwell control features of the II and III on Pertronix's website.
Gator, what I would suggest is to install a low value ballast resistor and see if coil heating is less, yet spark is still "hot" enough for the engine to run properly.
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