I bought some ngk sparkplug at schucks for about $2.

Some NGK's I had were about 4.5k ohms and one champion one I bought had about 25k ohms. So anyway, just ask for one WITHOUT a resistor. Seems to be used for lower voltage systems like motorcycles. So easy to find.

Krupa's spark plug has no resistor. Anyway, I think that sparkplug has no hope of becoming commercialized with this breakthrough because I think it may make it obsolete.

ROSCO, you're the plug expert, can you verify these results under compression? I did use the resistorless NGK motorcycle plug and sprayed water and it does explode water mist like in Gotoluc's vid. Would be interesting to see this circuit sparking your Firestorm duplication!

Guy at store said if it didn't have an R in the part number then it didn't have a resistor. He almost wanted to prove it to me with the tech books. lol - if it is that simple, then ask for a plug without an R in the number. If that is true, then simple to get a plug without resistor.

Also, as a thought, I wonder if Robert Krupa had his ignition system setup like this to make the firestorms do what they do???

Anyway, much easier probably to just buy one without a resistor.

I actually measured 1 ohm. Not much so that is good. However, my nails had less resistance 0 ohms! lol

HV rod in Gray Tube has no resistance.