A/C Iridium Plugs ?
Thread Starter
Racer
Joined: Jul 2004
Posts: 319
Likes: 13
From: Macomb Michigan
St. Jude Donor '12-'13-'14
A/C Iridium Plugs ?
The ? is : Are A/C iridium's for LS- 1 engines still being manufactured and/ or for sale ? Or have they been replaced with Platinum's ?
Need your input please.
The Big Guy !
Need your input please.
The Big Guy !
Race Director
Joined: May 2012
Posts: 15,759
Likes: 3,277
From: Phoenix area, AZ
As far as I know they're still around. That's what I used for my last tune-up. If you can't find the A/C Delco version the NGK Iridium plugs will work just as well. The gap is .040, make sure to check (carefully - make sure you don't scratch the Iridium post) before installing. Do not gap these plugs yourself, exchange any incorrectly gapped plugs for new.
They would not be replaced by Platinum as Iridium is a better conductor of electricity than Platinum is; going backwards would not be a good thing.
They would not be replaced by Platinum as Iridium is a better conductor of electricity than Platinum is; going backwards would not be a good thing.
Last edited by Corvette_Ed; Oct 13, 2013 at 04:05 PM.
Race Director
Joined: Jan 2008
Posts: 16,028
Likes: 170
From: oregon
As far as I know they're still around. That's what I used for my last tune-up. If you can't find the A/C Delco version the NGK Iridium plugs will work just as well. The gap is .040, make sure to check (carefully - make sure you don't scratch the Iridium post) before installing. Do not gap these plugs yourself, exchange any incorrectly gapped plugs for new.
They would not be replaced by Platinum as Iridium is a better conductor of electricity than Platinum is; going backwards would not be a good thing.
They would not be replaced by Platinum as Iridium is a better conductor of electricity than Platinum is; going backwards would not be a good thing.
the delco iridium part number is 41-110
Safety Car
Joined: Jan 2012
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From: Da U.P.
Race Director
Joined: May 2012
Posts: 15,759
Likes: 3,277
From: Phoenix area, AZ
I wasn't aware of that. Thanks for the info; I'll have to look into copper plugs as I don't have a problem changing them out every 20k. That's a little more than a year for me and my amount of driving time.
Instructor
Joined: Jul 2006
Posts: 136
Likes: 6
They wear out less than 20K - I installed the copper ones one year, I know it was more than 10K miles (I have 160K on the 2002 C5) and it started throwing misfire codes / you could feel it shudder. I pulled a few plugs and the little pad was either all gone or totally worn off.
Race Director
Joined: Jan 2008
Posts: 16,028
Likes: 170
From: oregon
They wear out less than 20K - I installed the copper ones one year, I know it was more than 10K miles (I have 160K on the 2002 C5) and it started throwing misfire codes / you could feel it shudder. I pulled a few plugs and the little pad was either all gone or totally worn off.
Drifting
Joined: Feb 2003
Posts: 1,761
Likes: 235
From: North Carolina
AC Delco 41-110 (replacing 41-985) is the current Iridium plug number. I just went through this looking for new plugs and checked it out after discovering the old plug number was no longer available. The Delco platinum plug number is 41-962.
Last edited by MAC5; Oct 13, 2013 at 08:50 PM.
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Thread Starter
Racer
Joined: Jul 2004
Posts: 319
Likes: 13
From: Macomb Michigan
St. Jude Donor '12-'13-'14
A/C 41-110 Iridium Plugs are available at Auto Zone. $ 7.00. Get the $ 1.50 P/P Auto Zone Rebate. Net cost $ 5.50 Only stores that Contract with A/C Delco sell their Filters and Plugs.
Racer
Joined: Dec 2005
Posts: 287
Likes: 2
From: Bay Area California
Yeah, that certainly wasn't my results either. Been running the Champion copper plugs, one heat range colder, with great results. Car has a moderate cam, heads cleaned up and headers plus very daily driven as well. These plugs work and have seen road course track days and driven every darn day. Perhaps the OEM spec plugs provide replace and ignore use, but the copper plugs simply work better in my humble opinion. Good luck...
A!
A!
Thread Starter
Racer
Joined: Jul 2004
Posts: 319
Likes: 13
From: Macomb Michigan
St. Jude Donor '12-'13-'14
OK guy's,found the rebate on the A/C Iridium's to be $2.00 P/P, NOT $ 1.50 as previously stated. There I saved you some more $ to buy beer / scotch.
The Big Guy !
The Big Guy !
Burning Brakes
Joined: Jul 2013
Posts: 1,027
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From: Granite City Illinois
