> I found a reference to the 3923's on a BMW tech page. They cross to a
> Champion RC9YC which I'm sure I plenty of in the great spark plug crate on
> the garage shelves.
>
> Now here is what I can't understand....
>
> Everybody says Copper only NOT Double Platinum.
>
> Okay here IS the rule of thump as I know it:
>
> Double Platinum is better than copper for conductivity in low powered
> ignition systems. Platinum is NOT RECOMMENDED for HIPO multi spark and CD
> ignition systems. The Platinum can flake off and pit in these hi powered
> systems.
>
> So I can understand why all you 3.9, 5.2, 5.9 owners scream no platinum.
> Many of you have MSD systems and others or take your rec's from people who
> do.
>
> Unfortunately, us 4.7 owners are stuck with the low output stock system.
> Forget the coil over plug design being hipo...It could be, but on our
> trucks it means they can lower the voltage even more. So we need all the
> help we can get. If Double Platinums conduct better why not use them in a
> stock ignition 4.7L???
>
> I'm confused. Can somebody give an answer other than DON'T USE
PLATINUM!!!
> At least say why?
Plain and simple, MSD says not to use Platinum plugs with their ignition
systems. They must know something, atleast more than I do if they say dont.
Kyle
93 Dakota 4x4 V6
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