Plugs 101...after school

[fahrvegnugen at cox.net (David Utley)]

> 
> From: "Larry Fry" <rocco16@sbcglobal.net>
> Date: 2004/06/18 Fri PM 08:25:19 EDT

>  A platinum plug's platinum electrode will last longer than the nickel
> center electrode on a non-platinum plug (thus longer plug life).  The reason
> that platinum is not generally used on the ground electrode is that the
> center electrode errodes at a far greater rate than the ground electrode so
> its not needed.

To add to this, with any spark, there is some sacrifice of the material from where the spark originated.  This is the reason points were such a pain in the ass, as they eventually errode such that all the material eventually ends up on the exiting point.  The same is true for plugs.  Platinum happens to hold up better than most at sacrificing material the least...

David

Cheers,
  David Utley

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