Iridium Spark Plugs

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Oct 4, 2002 | 02:12 PM

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Thread Starter

Driver School Candidate

Joined: Sep 2002

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From: Texas

Iridium Spark Plugs

anybody used them?
do they add hp or not?

thanks,
mike

Oct 4, 2002 | 02:58 PM

Lex Luthor

Lexus Champion

Joined: Sep 2001

Posts: 3,244

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From: New York

I use them, don't expect them to add any hp you can feel, but there's a warm fuzzy feeling you get from spending $15 per plug.....

Oct 4, 2002 | 05:07 PM

ChrisK

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From: Illinois

Or you can use the spark plugs for GS400 for less then $9 per plug.

Oct 4, 2002 | 05:12 PM

ToyoBeastly

Intermediate

Joined: Sep 2002

Posts: 484

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From: Arizona

i heard that Iridium isnt the way to go, and that copper is actually better.........True or False?

Oct 4, 2002 | 05:16 PM

lex400sc

Lexus Fanatic

Joined: Nov 2001

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From: bat country

Someone at the Norcal meet was mentioning that the Torquemaster and Denso sparkplugs actually produced dyno-proven power. Something to do with even detonation creating a more forceful explosion (???). I don't remember exactly what he was saying, but maybe Hermosa does?

Oct 4, 2002 | 07:16 PM

Lex Luthor

Lexus Champion

Joined: Sep 2001

Posts: 3,244

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From: New York

Yeah, torquemaster, splitfire, Bosch +4, etc, are all based on the theory that multiple electrodes will allow a stronger flame kernel and therefore more complete combustion, and it makes sense to me, I could see them being worth a couple hp, I couldn't feel a difference though and I have a very well-calibrated butt-dyno, but on a boosted GE, the NGK 3330 seems to be the way to go....

P.S. - The Iridium plugs have only one electrode, but it's absolutely tiny, the material allows it to be made smaller and still be conductive and easy to 'light off'

Last edited by Lex Luthor; Oct 4, 2002 at 07:19 PM.