Well, they come from a different plug from the factory (Not sure oof the
difference, but it's a CHAMPION for God's sake! :)). Seriously though, the
replacement Autolite plug is a 5224, which is the projected tip. The 3923
is one heat range colder, and is the smaller tip.
Speaking of which, what differnece does the tip make on the spark plug?
It's only like a 1/16" difference, but what's the difference?
Thanks
William
On Sat, 12 May 2001, Jim Miller wrote:
> The 3923s are for the cast iron magnum engines. There is a different number
> plug for the 4.7s
>
> "William H. Hiatt III" wrote:
>
> > Ok, last time I'll aska question. I put some 3923's in today, gapped at
> > .040, and it doesn't rev nearly as quick as it did with the +4 4417's.
> > Maybe it's just me and I'm crazy, and it's in my head, but does that make
> > a difference? Thanks alot
> >
> > william
>
>
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