COP Ignition Development

The weather turned nice to do some needed tree work. I put the ignition testing on hold to cut down some problem trees at my place, for what seemed like weeks. I do not burn wood, so I took it to a neighbor. I am muscle sore, and ready to get back to electronics work.
View attachment 20160323_132218.jpg

Yesterday was the first day to do some testing. I verified the plug firing order is correct at coils using a timing light. I put 8 marks at the base of distributor, and used a timing light on each plug. I also made a crude timing tape that shows timing in 10 crank degrees per increment. A small pop rivet pushed into the roll pin serves as a pointer. It is simple, use drill to spin shaft, timing light to view timing, RPM is read via user interface.
View attachment 20160324_163934.jpg

I also set up an external single current shunt using a 0.1 Ohm resistor, to monitor all coil currents with scope. The purpose is to determine dwell time is sufficient, to reach desired peak current under various operating conditions.