I just installed a CDI system on the leading coil in my RX-7, testing it out before possibly putting it in the airplane.

 

I don't have an issue with carbon plug fouling, only the dreaded lead. Is the lead fouling an insulation effect (a lead compound) on the electrode? If so, then I could see where a CDI system would help punch through. However, if the plugs are fouling because the lead puts a conductive film on the ceramic insulator, causing the electrode to be shorted to ground, then maybe a CDI system can't help with that?

 

Interesting stat:  I have never ever in hundreds of hours flooded the rotary engine on my Long-EZ. It always starts on the first crank.