Spark plug technology

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2 total messages Started by Tom Haapanen [DCS] Sat, 09 Nov 1985 14:33

#456

Author: Tom Haapanen [DCS]
Date: Sat, 09 Nov 1985 14:33

40 lines
1958 bytes

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
I came in here for that special offer
Guaranteed personality				 (c) The Clash, 1979

Re: Spark plug technology

#481

Author: bl
Date: Tue, 12 Nov 1985 21:27

35 lines
1884 bytes

> 
> 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).

Plugs like these have been used in nearly every piston powered airplane
ever built.

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