Champion RN12YC have always worked well for me (I drive hard). The "original"
plug was N12Y or YC (the C is for copper); the extra resistance doesn't hurt (at
least with solid wire secondaries).
Others prefer the NGK equivalent.
bs
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Bob Spidell San Jose, CA bspidell@comcast.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
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-------------- Original message ----------------------
From: John Miller <healeys@n4vu.com>
> Edward Kiessling wrote:
>
> > Tune-up bj8 3000 which is the best spark plug to use.
> >
> >
> While I don't remember the plug numbers, you'll want to keep in mind
> that the BJ8 can be a little sensitive to heat range, and stock plugs
> will load up if you drive too sedately. If that's you, go with one
> grade hotter than stock, but if you drive more vigorously, the stock
> plug will do fine.
>
> First symptom of a plug loading up is stumbling while accelerating.
>
> --
> John Miller
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