| Re: [GMCnet] New spark plugs on the horizon [message #123086] |
Sun, 24 April 2011 22:11  |
Gary Casey
Messages: 448
Registered: September 2009
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Senior Member |
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One thing to note is that any of the "multiple gap" plugs only fire on one of
the gaps at a time. Once the arc forms across one of the gaps the voltage drops
and it becomes impossible to arc across any of the others. The plugs can last
longer, but only if electrode erosion is the cause of the "wear-out". As
one electrode erodes to a larger gap, another will become the favored electrode
and this distributes the erosion over all the gaps. So, in summary, no, I
wouldn't expect the effective timing to change at all.
Gary Casey
Neat idea. I wonder if these would change our timing any?? Since they
have 3 different places where they ignite the mixture in the cylinder,
there wouldn't be just one flame front, but three so the mixture would
burn quicker. Just wondering. Anyway, I'm done thinking about it.
--
Gary and Diana Berry
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| Re: [GMCnet] New spark plugs on the horizon [message #123161 is a reply to message #123086] |
Mon, 25 April 2011 19:56  |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
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Senior Member |
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| Gary Casey wrote on Sun, 24 April 2011 20:11 |
One thing to note is that any of the "multiple gap" plugs only fire on one of
the gaps at a time. Once the arc forms across one of the gaps the voltage drops
and it becomes impossible to arc across any of the others. ...
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While I agree with you about "multiple gap" plugs, did you read the article?
It was about firing LASERS into the chamber focused on three different places in the chamber. NO SPARK, NO GAP. It is a new type of laser (capable of standing up to the temperatures and pressure of the chamber) fed by other lasers through fiber optics. High tech stuff.
I would expect that it would change the flame front of the fuel/air mixture and would change the "optimum" timing. Not that I think we have to worry about it very soon.
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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