Mega/Microsquirt and 60-2 flywheel - what value shunt resistor?
 

I'm using a Microsquirt v3 with a Porsche 993 VR crank pickup and my flywheel cut to 60-2.

I got a great start and picture perfect composite logs at low RPMs but ran into signal breakup and the "fake rev limiter" behavior at around 2,600 rpm.

I added a 10k ohm shunt across the pins in-harness for the crank pickup and that raised my "rev limit" to about 4,600 rpm, but its still there.

If you've gone down this patch, what value shunt resistor did you end up with to eliminate this problem?

Could the issue be the gap? I've read that it should be 1mm, but I'm not an expert.

20k

Gap is in spec. I'll try 20k.

Although going to a higher value doesn't fit the logic I was using. If the issue is as claimed, that the VR sensor is producing too much voltage at high RPMs, and the resistor across the pins allows some of that voltage to leak to ground, I would have expected a lower value resistor to be the solution.

Regardless, I'll try 20k