08-24-2015, 10:20 AM
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#3
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Senior Member
Join Date: Dec 2013
Location: McCalla, AL
Posts: 181
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Re: Spark plug part number for Winfield head.
Quote:
Originally Posted by hardtimes
Hey dave,
Well what CR is the alum head that you intend using ?
The higher the CR, the colder plug is used.
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It's a 7:1
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