electronic ignition

I can remember the day back in 1992 during one of my first few primary training lessons when my Lynn, my CFI popped open the left side cowling of one of the two 1978 Piper Tomahawks in order to introduce me to the systems that make the thing go. I paid attention as much as any 14 year old would...

Hi All, I have an electroair electronic ignition setup paired with a mag on a my Comanche 250 (converted to fuel injection). The system works well below 80% power but at WOT/takeoff/manifold pressure at or greater than 25 inches, the engine stutters and makes a scratching noise. You can feel...