type II coils primary inductance measures 3.1MH with a Q of 9.5------type I measures 3.8MH with a Q of 7.86
certainly with all factors being equal (again not likely) the coil with the lowest inductance should be able to work at higher speeds----------as far as issues dealing with coil saturation a realistic judgement cannot be made as to the real effect unless a hysteresis curve of the core is known-----and considering that these coils have many sources and countries of origin it is not likely that they are at all similar-------the bulk of current limiting in the module appears to be a single resistor that is in series with the ground connection common for all three coils-------in my measurement the scope was floating so the voltage reading was correct across the coils and actual location of the drop was not relevant -------i am not convinced that the coils cannot be driven harder but i am going to set up a variable voltage constant current driver to determine this-----my guess is that the limiting is to protect the module as much as the coil?? -------as far as higher voltages allowing for faster charge times that is obviously true since RC and RL time constants are independant of voltage-------i never took the time to analyze this critter before but its certainly a different animal--------current paths are certainly not anything like the kettering or CD systems that are so common
