ngk iridiums

[BoostJunki3]

anybody running iridium NGK tr6ix? be nice to not have to change plugs all the time but i heard copper is best what are you guys opinions?

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[02BlueGT]

I Ran them, Idle is really smooth and mid range is nice, but the Iridum tip stays hotter, so a TR6I will knock on even a stock setup.....They were only a .7 MPG gain over the standard Tr6's though

 

[BoostJunki3]

what about a tr8 race iridium plug?

 

[Bob Kazamakis]

Copper core ftw.

 

[Turbocharged400sbc]

the way it was always put to me

copper is a better heatsink and cheeper, in racing you want the heat away from the plug asap (cutback groundstraps, shorter porcelin aka colder)
anbd on the street ya want to keep the heat to clean it

far better in racing to replace the plug than reuse them when reading your plugs

oil in the chamber increases preignition risks, just as much if not more is a damn glow plug (hot spot)

i just extend it to the street cause i like being able to read plugs at least once a year....it might just clue you in that an injector isnt spraying properly etc