but other have different opinion about the resistor.
No, I think we are in agreement about the resistor. The Bosch coil MUST have it's resistor in place otherwise it will have 12V on its primary winding and eventually burn out. I also said further up in this thread that these electronic units work best with their OE coils but presumably a 'standard' coil will work reasonably well too although will only provide the sort of spark one would get from a 'standard' points system. The main difference in the coils between standard and electronic is in the primary windings incidentally. There's a limit to the amount of current that a set of points can 'sink' without burning out. Coils intended for electronic ignition units have lower impedance primary windings and will therefore require much higher current which is not a problem for the switching transistor in the electronic control modules.
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