Originally Posted by
jorgan
Thanks, I got the RCexl unit, well is in the post. So yes an audible or led indication is always the best way. Is there a way to test the CDI units, to see what their dwell characteristics are? I suppose all motors have there own characteristics too? I bet these question have all been asked and answered.
Yes... A strobe light and an accurate Tach go a long way
But there are no "characteristics" as such... There is a digital processor inside, and the advance/retardation is strictly linear over 20 degrees from 1000 to 4000 RPM.
Digital processor is programmed such that it measures RPM, and calculates necessary delay. Above 4K it fires without delay upon triggering, at 1000 RPM it delays the trigger corresponding to 20 degrees.