Hi again,

I wrote Linear and Coilcraft, and they suggested me to use the new Linear Technology LT3751 with a CoilCraft GA-3460-BL. This will charge a 200µF capacitor to 500V in 200ms with an input voltage of 12V. So I guess it could charge the 470nF in about 0.5ms with the input voltage at 12V. The voltage range goes all the way down to 4.75V so it will also run on 6V, but the charge time will increase, but I guess it will still be below 2ms.

My goal is a charge time around 2ms so I can use the CDI on a tuned Zenoah G260RC (on FG RC cars) - these can run above 20.000rpm so if the CDI can handle 30.000rpm (2ms), it will be fine.

Also, I think I will add a separate battery for the CDI, I don't think it will be a good idea to use the receiver battery because of the power consumption and electric noise.
I have another project going on, which will require 3 or 4 cells LiPo to be mounted on the FG car, so I will have 11.1-14.8V available for the CDI also.