Coils duty cycle

hello guys,

can someone give us a brief explaination about the coils duty cycle and by monitering it how can we improve our coil system or how can i know when my coils are giving enough power for the required car application or not

http://www.dtec.net.au/Ignition%20Coil%20Dwell%20Calibration.htm

has some good information. on coils and how to test/calibrate them.

i've got a setup on the bench for test like this, to wary the voltage and dwell. basicly i'm tricking a ecu into thinking it's running an engine and using a potmeter to change the dwell on the diffrente voltages. the coil usualy demand a good power supply and i use capacitors in addition. (the car battery wil handle the amp draw but not all bench top power supplies are fast enough)