Hot And Cold Plugs?
05-12-2005, 10:57 AM
#2
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Join Date: Dec 1969
Location: San Diego, CA
Posts: 4,950
Re: Hot And Cold Plugs?
A spark plug needs to hot enough to be self cleaning (burn off deposits) yet not be too hot that it causes the fuel/air mix to ignite before the spark plug fires. As you HP increases, you're more likely to pre-ignite your air/fuel ratio, therefore you run a colder plug than stock. There can be 6 or more heat ranges of plugs. I'm presently running two heat ranges colder than stock on my 10# blower car.
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