Supercharged/Turbocharged The increase in air/fuel pressure above atmospheric pressure in the intake system caused by the action of a supercharger or turbocharger attached to an engine.

copper, or platinum plugs? Part#?

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Old May 1, 2003 | 05:54 AM
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CASS98SE's Avatar
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From: kandiyohi, mn
copper, or platinum plugs? Part#?

My car is going to be supercharged with about 10 psi of boost. I read to get some copper spark plugs, one step colder. What is the part number for the plugs?
Old May 1, 2003 | 07:28 AM
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Re: copper, or platinum plugs? Part#?

Originally posted by CASS98SE
My car is going to be supercharged with about 10 psi of boost. I read to get some copper spark plugs, one step colder. What is the part number for the plugs?
One step colder copper plugs:

NGK # BKR6E-11
Nissan # 22401 - 50Y06


The -11 part of the NGK number is multiplied by .004" to get the gap size for an engine producing stock hp. This would make the stock gap 0.044". Most people with SC's and such are running 0.034" - 0.038" in order to further reduce tendency for detonation.
Old May 1, 2003 | 10:43 PM
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Re: copper, or platinum plugs? Part#?

Also you may want to try iridiums.. this sounds like a Made for TV ad gone wrong but, "I love mine and they work great for me!"

You may also get a little more life out of them

Originally posted by CASS98SE
My car is going to be supercharged with about 10 psi of boost. I read to get some copper spark plugs, one step colder. What is the part number for the plugs?
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