Reply To: Fusion Oil

[KeithPickering]

Lerner wrote: We use automotive spark plugs as the trigger electrode in our spark-gap switches. We are making progress in getting the switches to all fire together, but we are beating up on our spark plugs a lot. The ends of the electrode seems to be melting. What we needs is a spark plug with a somewhat thicker electrode to spread out the current–something like 1/8″ in diameter rather than the 1/12″ we have. Or we could maybe use the iridium types, but we have only found those with very small electrode tips, which will make the problem worse. Anyone out there know a lot about spark plugs?

Further update: NGK’s racing catalog is here:
http://www.ngksparkplugs.com/docs/racing_catalog.pdf

Not many 12-range plugs available, but most are available in range 11, including platinum and iridium electrodes. For comparison, my car would use an NGK plug with heat range 6, which is 5 ranges hotter.