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Dec 13, 2010 | 01:48 PM

#21

xtremerevolution

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Joined: Jun 2007

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From: New Lenox, IL

xtremerevolution is on a distinguished road

Quote:

Originally Posted by SignOfZeta

I see these two paragraphs posted all over the Internet, which appear to be Bosch'* take on the matter:

For what it'* worth, I believe GM calls for iridium plugs in the L36. Many members (including myself) have no problem with coppers. Seems to have something to do with platinum itself.

There are the facts; draw your own conclusions.

I've used Champion Double Platinum plugs in my L27 before. Ran those for about 80k miles with absolutely no problems and perfect performance. Those weren't Bosch plugs though.

Quote:

Originally Posted by Human

That would stand to reason. I know GM specifies iridium plugs for the Northstar. If I recall correctly, the stock AC plugs for the Northstar are re-branded Denso Iridiums.

With the Northstars, I wouldn't have it any other way. The rear plugs on the GXP are a bit involved to get to from what I've heard.

Quote:

Originally Posted by sseidriver97

like said i have em in my truck idk how a 3800 likes them..only one way to find out

A 3800 will not like them. I've tried it, many people have tried it, and its a bad idea. Save yourself the work and trip to the store and just get a good set of ACDelco, Champion, or Autolite plugs.

Dec 13, 2010 | 03:07 PM

#22

sseidriver97

Senior Member

True Car Nut

Joined: Mar 2010

Posts: 7,124

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From: Portage mi

there * your red flag VENDO

and i only bought them because it was one of those days where iwas super boired just sittin around watchin tv and i saw sttacey david on gearz test em in a lil machine so i figured eh why not and wen and got some lol

Dec 13, 2010 | 03:09 PM

#23

GXP Venom

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Joined: Jan 2006

Posts: 16,539

Likes: 18

From: Purgatory, Pennsylvania

Quote:

Originally Posted by Human

That would stand to reason. I know GM specifies iridium plugs for the Northstar. If I recall correctly, the stock AC plugs for the Northstar are re-branded Denso Iridiums.

Don't know where you came up with that. GM specifies double platinum clads for almost all N* applications.
http://parts-catalog.acdelco.com/cat...&parttype=3210

They are set a .50 and Not to be regapped.

And as far as Denso being a AC vendor, I highly doubt GM would use Jap plugs. And certainly not admit to it. I hear the gamut of guesses as to who make what AC Delco Plug. And not once have I seen a credible source. AC isn't talking.