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Old 11-12-2008, 10:13 PM   #1
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Spark Plug Differences???
What is the difference in most spark plugs? Now when I ask this I mean, the size and length of the plugs. I know some heads ask for certain plugs such as the vortecs, I used the delco 993s.. but my main ? is what is the difference between size and length, if any?
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Old 11-13-2008, 12:13 AM   #2
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Re: Spark Plug Differences???
Cast iron heads use a tapered seat to seal the plug, aluminum heads use a plug that seals with a crush washer. Vortec plugs use a shorter reach than other heads.
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Old 11-13-2008, 10:37 AM   #3
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Re: Spark Plug Differences???
Do they have different heat ratings or anything like that.. Im quite sure the spark is the same depending on the gap size, but I was just curious?
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Old 11-13-2008, 11:46 AM   #4
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Re: Spark Plug Differences???
Most plugs come in a variety of temperature ranges.
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Old 11-13-2008, 11:46 AM
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Reload this Page Spark Plug Differences???
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