Spark Plug Differences???
Thread Starter
Joined: Feb 2006
Posts: 1,265
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From: Sacramento Ca
Car: 86 Trans am, 91 Camaro RS
Engine: 355 Sbc, nothin yet
Transmission: 700r4- both
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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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
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.
Thread Starter
Joined: Feb 2006
Posts: 1,265
Likes: 0
From: Sacramento Ca
Car: 86 Trans am, 91 Camaro RS
Engine: 355 Sbc, nothin yet
Transmission: 700r4- both
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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