RE: New CDI - opensource project JMJ and Bigboat
It depent of the rpm the engine can make.
For 15,000 rpm you need >250 Hz the load the C (15,000 / 60 = 250)
To secure the C is realy loaded, I think you need 500Hz.
Normal DC/DC powersuppley use 400kHz, to get enough current.
I think the middle between 500 and 400,000 Hz will do the job.