At 10:28 AM 8/7/2000, you wrote:
Chapion, and NGK make them. If any other option, I'd use it, they are generally a pain in the a$$. Can work fine one minute, and turn to dodo the next. NASCAR briefly experiments with them from time to time, but no one says with them cause they are such a PITA. They seem just fine on rotaries, but that's all in my experience. Played alot with them in a SB Mopar years ago, and gave up. Ignition system has alot to do with them to, they are very sensitive to voltage / current.
I'm being sent some funky plugs to play with in my 5.0L Explorer... BRISK is the brand... Made in Czech republic. they are weird and here's the best definition of the gaps etc without a picture... Center electrode is normal, but has a metal ring molded into the ceramic just under the tip... At the lower edge of this "ring" are 3 ground electrodes equi-spaced from the shell... Basically you get 2 sparks per firing... one from the tip to the ring, and the second from the ring to one of the ground electrodes... Supposedly "self cleaning" and improves idle etc due to the pseudo surface-gap that exposes the whole electrode/spark to the mixture. Their free, so I'm not out anything if they don't work any better than stock plugs!
Had a set of another style they had in a dodge neon... Actually worked... these had 2 rings on the center insulator and the final gap was from the 2nd ring to the shell... Smoother idle, better starting, and seemed to have a bit more pull top end (butt-o-meter and on a timer... knocked .3 seconds off the 0-60 over new stock plugs)
=========================================================== David Cooley N5XMT Internet: N5XMT@triad.rr.com Packet: N5XMT@KQ4LO.#INT.NC.USA.NA T.A.P.R. Member #7068 I am Pentium of Borg... Division is Futile! =========================================================== ---------------------------------------------------------------------------- To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes) in the body of a message (not the subject) to majordomo@lists.diy-efi.org