I talked to Klaus and he told me he uses these tiny
   magnets pressed into a aluminum 6061 T6 disk.

   The hall effect sensors are tiny as well so that gives more
   mounting options.

   After he presses them in he uses a rivet squeezer to lock
   in the magnet. It will take a bit of trial and error to get
   exactly the right size drill.

   He has probably sold over a 100 CD ignitions for aircraft
   engines in experimental's.

   Paul Lamar

Paul,
I mentioned this before but it bears repeating. Kawasaki went to a Hall effect trigger to allow a non-mechanical advance mechanism. They used a thryristor (I believe) with a trigger voltage lower than peak. The increasing amplitude of the sign wave caused the trigger event earlier as RPM increased. A neat and very reliable way to get spark advance.

Bill Jepson

We don't need no stinking advance. :-)
For a turbo you might want to retard at high intake temperatures.

Paul Lamar

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