I made a few tests with ordinary spark plugs and capacitors. Here is a video:
YouTube - spark plug/capacitor test
First I show what the arc looks like in an ordinary spark plug at about 5kV AC at 50Hz. Then I just attach a capacitor parallel to the spark plug and you can see how much stronger the arc appears, its just like a primary Tesla coil circuit without the secondary winding. And at last I show how the arcs look like if I use a spark plug with cut away ground electrode. This looks like those firestorm spark plug arcs in that video demonstration Aaron posted. I want to try adding a capacitor in parallel the spark plug on my gas generator to see how the fuel economy changes. Because I heard from many sources that a more powerful spark makes a huge difference. Any comments before I test this? Can i fry the induction coil of my generator this way?
Thanks,
Jetijs.