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Posting-Version: version B 2.10.2 9/18/84; site watdcsu.UUCP
Path: utzoo!watmath!watnot!watdcsu!haapanen
From: haapanen@watdcsu.UUCP (Tom Haapanen [DCS])
Newsgroups: net.auto.tech
Subject: Spark plug technology
Message-ID: <1856@watdcsu.UUCP>
Date: Sat, 9-Nov-85 09:33:04 EST
Article-I.D.: watdcsu.1856
Posted: Sat Nov  9 09:33:04 1985
Date-Received: Sun, 10-Nov-85 09:44:30 EST
Reply-To: haapanen@watdcsu.UUCP (Tom Haapanen [DCS])
Organization: U of Waterloo, Ontario
Lines: 40


As well all know (since we read net.auto.tech, right?), a spark plug
has an end shaped something like the diagram below:


                     |---------------\
                     |-------------\  \
           gap -->    _____         \  \
                     |     |         \  \
                     |     |          |  |
                     |     |          |  |

Well, how about this design?  I found one of these just last night.
Anybody seen it before?

			     gap
			      |
			      |
			      v

                       |----|  |---------------\
                       |    |  |-------------\  \
                       |    |                 \  \
                       |    |                  \  \
                       |    |                   |  |
                       |    |                   |  |

Where I found this was on my new (!) 1956 Porsche 356A 1600 engine.  I
was disassembling it, and pulled the spark plugs to examine them.  I
took me about three looks before I actually figured out why the plugs
didn't look right.  Is this what all plugs used to look like 30 years
ago or is this specifically a Porsche plug (they're made by Bosch).


				   \tom haapanen
				   watmath!watdcsu!haapanen
Im all lost in the Supermarket
I can no longer shop happily
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