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From: davidsen@steinmetz.UUCP (Davidsen)
Newsgroups: net.auto.tech
Subject: Re: Spark plug technology
Message-ID: <323@steinmetz.UUCP>
Date: Thu, 14-Nov-85 08:50:08 EST
Article-I.D.: steinmet.323
Posted: Thu Nov 14 08:50:08 1985
Date-Received: Mon, 18-Nov-85 07:11:12 EST
References: <1856@watdcsu.UUCP> <3163@hplabsb.UUCP>
Reply-To: davidsen@kbsvax.UUCP (Davidsen)
Organization: GE CRD, Schenectady, NY
Lines: 26
Keywords: sparkplug

In article <3163@hplabsb.UUCP> bl@hplabsb.UUCP writes:
> 
> As well all know (since we read net.auto.tech, right?), a spark plug
> has an end shaped something like the diagram below:
--- diagram deleted ---
> 
> Well, how about this design?  I found one of these just last night.
> Anybody seen it before?
> 
--- 'nother diagram deleted ---

We used to reshape conventional plugs to have that style gap in some of the
drag race cars I used to run... seems that the piston came up enough to close
the gap on the conventional design.

Someone used to make (may still) a plug with a center electrode and a ring
around it, which fires on the surface of the insulator. Perhaps someone in the
net can recall the maker(s?) and knows if they are still in business. I
confess that I never found any performance difference, except that I got rid
of my problem with misfire after high rpm (and I didn't have to regap the
plugs after every run).
-- 
	billD	(..seismo!rochester!steinmetz!crdos1!davidsen)
		(davidsen@GE-CRD.ARPA)

"It seemed like a good idea at the time..."