Testing the HiRev 7500

They are not anymore for very good reasons!
It is the heat in the spark that ignites the mixture, & the heat comes from the current in the spark.
Newbomb Turk claimed in a post a few weeks ago that a 3 amp magneto gave a hotter spark than HEI. Absolute nonsense! After 4 requests of proof of this claim, he provided a video that gave the magneto specs.
Spark current was 58 mA. About 1/3rd that of a Blaster 2 coil [ 140mA ] & about a 1/4 of tthe HEI coil [ 200 mA ].