Has anyone used an inductive pickup from the ignition system on a WW Corvair to drive the rpm function on an MGL engine monitor? Or other rpm pickups that work the MGL products? I am aware of the past problems with MGL and Corvairs, but assuming that is using a hard wire attachment.

I came across this 2008 Kitplanes article by Rick Lindstrom, https://www.kitplanes.com/mgl-avionics-stratomaster-maxi-single-e1/, where he indicates he made such a pickup in an older MGL EMS.

…So I ended up making an inductive pick-up out of a coil of safety wire that wrapped around the ignition coils primary lead and produced a nice 5-volt pulse with each spark. This drove the tach input on the E1 nicely.

I would like to have an EMS in my Zenith 750 but don’t want to redo the panel. The current MGL Vega EMS-1 will fit in a 2 ¼” hole, so no surgery is needed. MGL has a LOG-1 instrument that can record the data. I currently have the ring gear tooth counter which works fine, but isn’t compatible with the EMS-1. An inductive pickup would seem to do the job.

https://www.parts4aircraft.com/mgl-avionics-vega-ems-1-engine-monitor

https://www.parts4aircraft.com/mgl-avionics-log-1-data-logger-for-b...

I eventually want to redo the panel, but for now I think this system will do what I want without spending $3-5,000 and redoing the panel to contain a larger display. I now just have round gauges, and the CHT and EGT, especially, aren’t very easy to read.

Thanks for any guidance!

Bruce