Having just installed a Ford EDIS wasted spark system on my nashcan six, it occurred to me how incredibly easy it would be to fab up an extreme performance breaker points based ignition.
Picture three flat disc cams, a cam bump (increased radius) for about 90 degrees. Stack them up, spread the cams out 120 degrees. Mount this stack to the crank pulley.
Line up three breaker points up side by side, so each is bumped by one of the cam discs.
Add a spring and flyweight system to rotate the disc stack relative to the crank for mechanical advance. Slide the contact points with a vacuum diaphragm for vacc advance if needed.
Wire the three points to an EDIS coil pack. There's nothing high-tech about them, just transformers. Each coil drives cylinder pairs that are physically in the same position but two Otto cycles away (eg. compression + exhaust).
Now for a six banger you have three *simple* ignitions, each running at 1/3rd crank speed. Plus, you have up to 120 degrees of dwell to charge the coil. FAT HOT CHEAP SPARK.
Done and done.
*** Why wasn't this done in 1950? 1960?
