Plug cuts

[Bob Wooten]

That's kinda what I figured, it is hard enough to see in a plug let alone be
able to take a picture of one.

Ohio is a long way from San Diego, maybe w/enough heads up I can schedule a
business trip around the next one in the spring (or whenever you have it).

BW

-----Original Message-----
From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
Behalf Of Bruce
Sent: Friday, September 08, 2000 8:41 PM
To: diy_efi at diy-efi.org
Subject: Re: Plug cuts



The best series of plug photos were in a series of articles in Circle Track
and Racing Technology about 5 years ago.
It's extremely hard to get enough magnification, and still have something
clear enough to print.
Kinda makes gettin to the EFI POWWOW worth it just for understanding what
your seeing when you look atta plug.
Bruce


From: "Bob Wooten" <r71chevy at earthlink.net>
Subject: RE: Plug cuts
> Thanks for all the help guys.  if anyone runs into a Web site or some
> pictures that show all these different things (good bad or indifferent) I
> would appreciate it.
> BW

> From: owner-diy_efi at diy-efi.org [mailto:owner-diy_efi at diy-efi.org]On
> Behalf Of Bruce
> Subject: Re: Plug cuts
> From: "Bob Wooten" <r71chevy at earthlink.net>
> Subject: Plug cuts
> > I know that we have been down this road before, but I have a few more
> > specific questions.  I went back to the NGK web site today
> > (http://www.ngksparkplugs.com/techinfo/spark_plugs/faq/faqread2.asp) to
> take
> > a look @ some of the pictures that they have there to see if I could see
> > Bruce's "fly turds" (I think that was the term that he/you used), in
> regards
> > to what the plug looked like for detonation.  about the closest that
they
> > had was what they called "overheating".  Is this similar to what I would
> > expect to see when I see detonation happening?
>
> In the caption they're looking at the glossiness as an indication of the
> overheating, well, since the plug is running WAY TOO hot one might expect
to
> see traces of detonation, and yes those specks are serious enough to
> indication that it was in fact detonationg, in a serious manner.  Less
> severe case will have smaller and fewer of the specks.  With a 3x or more
> power magnifier they get real easy to see, and they are generally little
> spheres of material.
>
> > does anyone have a picture of the "fire ring", & a description of where
it
> > is (high or low) & which is an indication of what?
>
> The Ring or band is an indication of timing.
> Too advanced of timing, and the flame is over before leaving any residue
on
> the porclean.  Too retarded and the band is way up inside, and where the
> porclean meets the housing.   Too hot of plug, and it runs too hot for
much
> of an ash deposit to form.
>
> Band reading is for real hotrods then stockers.   The oems are so
concerned
> with 100K ish tune up intervals, they are hard to read (the bands).
> Also, some brews of gas now are very clean burning.
> Some of the racing fuel suppliers are mentioning specifically now that
they
> add additives, and what to look for.
>
> If your plugs are showing any pink hue to them my advise is to change
brands
> of fuel, or change plugs real often.
> Bruce
>
> >
> > thanks mucho
> >
> > Bob Wooten
> > r71chevy at earthlink.net
> > www.r71camaro.homestead.com
> >


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