Spark plugs

[Bruce]

Less filling, more taste?.

Or are you asking about why the cooler plug?.

If the later:
The center electrode can hold just enough heat that in some transistional
stuff (tip-in detonation / ping), and some conditions of WOT trigger a
slight amount of detonation.   Lots of reasons, but usually from running too
small of injector, and running out of AE.  Often folks just look at injector
sizing as a function of BSFC, and totally miss the AE stuff.  Or get cought
up in the lean as possible mode, and then any variance in fuel fubar's
things.
Bruce




From: "Axel Rietschin" <axel_rietschin at compuserve.com>
Subject: Re: Spark plugs
> From: "Bruce" nacelp at bright.net
> Subject: Re: Spark plugs
> [...]
> >    If your absolutely sure of your AFR, and running conservative timing,
> and your still seeing detonation sights on the plug, you might want to try
a
> > colder plug.
> More porclean, less volume, higher CR, more knock? :-)
> --Axel

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