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1973/450sl

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#1

Old

05-03-2007, 05:49 PM

zeggate

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Location: queens,new york

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1973/450sl

I am considering changing spark plugs to NGK BP5 or 6ES . Are they copper core and are they any good?

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#2

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05-03-2007, 06:16 PM

hill

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Location: Northern Calif Sacramento

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Copper core is best. Stock ignition system does not have enough ooomph to light off a platinum plug. As far as 5 or 6 what kind of temperature and style of driving will you be doing?

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#3

Old

05-03-2007, 06:25 PM

zeggate

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Location: queens,new york

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1973/450sl

Basically city driving and an occasional trip to Atlantic City at 75 mph. Ambient temps from 50 F-95 F as I only drive the car during thespring thru fall months.

Last edited by zeggate; 05-03-2007 at 06:28 PM. Reason: omission

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