[Diy_efi] Spark Plug readings

[Bruce]

In a nutshell, glazing for a spark plug is,
Too much heat for too long.
Most often the color is a shade of yellow, but with the tune far enough off,
you can get it in brown, gray, and bone white.
Some brands of gas happen to be more prone to it then others.   Shell loves
to turn plugs pink, and or glaze them.   For them it might have to do with
the additive package they use.
Bruce



----- Original Message -----
From: "Bob Wooten" <r71chevy at earthlink.net>
To: <diy_efi at diy-efi.org>
Sent: Monday, July 29, 2002 8:12 PM
Subject: RE: [Diy_efi] Spark Plug readings


> what is high speed glazing?  does that mean that it "glazed" quickly or
that
> running the engine @ a high rpm caused "glazing"?
>
> What is glazing?  are you talking about the very shiny chocolate sauce on
> the one plug?
>
> BW
>
> -----Original Message-----
> From: diy_efi-admin at diy-efi.org [mailto:diy_efi-admin at diy-efi.org]On
> Behalf Of Bruce
> Sent: Saturday, July 29, 1995 4:51 PM
> To: diy_efi at diy-efi.org
> Subject: Re: [Diy_efi] Spark Plug readings
>
>
>
> Worst case of high speed glazing I seen in years.
> Variety of problems to generate these.
> Too hot of plug too much timing, and/or poor distribution.
> 2nd plug has seen some serious detonation.
> Bruce
>
> ----- Original Message -----
> From: "Brian Renegar" <thomas.renegar at nist.gov>
> To: <diy_efi at diy-efi.org>
> Sent: Monday, July 29, 2002 1:37 PM
> Subject: [Diy_efi] Spark Plug readings
>
>
> > What can you guys tell me about these spark plugs:
> >
> > http://www.twinturbostang.com/tech/sparkplugs/sparkplug1.jpg
> > http://www.twinturbostang.com/tech/sparkplugs/sparkplug5.jpg
> > http://www.twinturbostang.com/tech/sparkplugs/sparkplug8.jpg
> >
> > These came out of a freshly re-built motor.  200 miles on it so far.  It
> > had been pulling real strong.  But the last time I did a WOT blast it
was
> > cutting out REAL bad, and was also popping in the exhaust.  I won't say
> > anything about the tune or my opinion of the plugs, to get your unbiased
> > opinion.  :-)
> >
> > Thanks,
> > Brian
> >
> >
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> >
>
>
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