Quote:
Originally Posted by Cal Learner
Right about NGKs, they are great. Out of curiosity, why did you step down to a colder plug? What difference have you noticed?
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I use a colder plug because I'm running 7+psi boost with twin turbos.
Gap at thirty thousandths.
Limits detonation.
Stock or older engines should run the specified heat range and if an oil burner may consider a step up in heat range.