Bob, almost anything which provides 35 teeth and a skipped tooth space will work. The Lycoming flywheel has 12 AN4-sized mount points, so for a first pass, I drew this, and Kirk (that's Kirk Harrel, the Mustang II owner) turned it out on his mill. It's a steel plate, 3/16" thick IIRC, cut on a rotary table. It would be real easy to do on a waterjet; hand the operator a .dwg file and a few bucks. Flywheel = gray, trigger wheel = white. A standard Ford pickup points forward (at the sides of the teeth), much like the mount you've seen for hall effect triggers. Note small alternator pulley.
BTW, a little design tweaking would save weight, but for those who have rear CG concerns, well....
I really like the position sensors shown in this picture , They look a bit more robust than the ones I have been able to locate does anyone have a source or part number for these?
On Kirk's Mustang II:
Make the tooth width the same as the width of the tip of the pickup; that nets a clean sine wave signal for the EDIS module. See the blip on the right? That's the passage of the skipped tooth.
[/QUOTE
]I really like the position sensors shown in this picture , They look a bit more robust than the ones I have been able to locate does anyone have a source or part number for these?