On Thu, 15 Oct 1998, Tomislav Marincic wrote:
> Regarding spark plugs, it was the early cars that used the hotter
> N12Y's, the later ones (and the PI cars) used the colder N9Y's. I agree
> it's counterintuitive based only on compression, but perhaps other
> factors were at work making the engines run hotter after 1973 despite
> the lower CR?
Anyone out there have a logical (maybe even "official") explanation to all
this? I'm simply curious, given the fact that the situation is just the
opposite with the Spitfire motor: N9Y for the earlier Mk.3 motor and N12Y
for the later cars.
--Andy
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* 10/Herald/Vitesse (Sports 6) Consultant *
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