Thread: spark plug ???????
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Old 11-18-2003, 05:38 PM
Jack21 Jack21 is offline
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This is a time imemorial question with no easy answer, just starting points.

For a stock Ford engine, the factory manual should specify which plug to use. A heatrange up, or down, should be all that is necessary. Up a notch, (hotter plug) for cold weather, city type driving. Down a notch (colder plug) for hyway driving in hot climates.

Non-OEM heads (AFR, Edelbrock, Trick Flow Specalties, itc., will have their own spark plug recommendations.
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