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NGK Iridium OR Ac Delco Iridium Spark Plugs..

This is a discussion on NGK Iridium OR Ac Delco Iridium Spark Plugs.. within the External Engine forums, part of the LSx Technical Help Section category; Anyone have anything to say about the two?...Dunno which ones I want to use, anyone that has them installed chime ...

  1. #1
    Member tyxpx's Avatar
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    Impulse Blue
    2006 GTO

    NGK Iridium OR Ac Delco Iridium Spark Plugs..

    Anyone have anything to say about the two?...Dunno which ones I want to use, anyone that has them installed chime in here...Thanks.

    I have a Ls2 with the usual bolt on's.

  2. #2
    Member blackls1ta's Avatar
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    black
    2000 ws.6 m6

    22 and a gto damn what job you got?i am changin my plugs too wondrin same question

  3. #3
    Member tyxpx's Avatar
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    Yeah...it's paid off too . I'm a government contractor, KBR. But I've heard good and bad things about both plugs, mostly by people that probaly have'nt even used them though....

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    primer
    1973 Camaro

    I install the AC Delco Iridium plugs when I installed headers. Car had 57K on it at the time and the factory plugs looked as good as the ones I put in. 20K since and no issues.
    '73 Plain Jane Camaro, Gen III, T56
    '02 WS6, M6
    All gone but not forgotten

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    Senior Member SeVeReDiStOrTiOn's Avatar
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    05 Wrangler
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    NGK makes the Delco iridium plugs...so which ever set you can get cheaper is the way i'd go.

  6. #6
    Senior Member splitfinger09's Avatar
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    I just installed the Delco plugs and MSD 8.5 wires. So far no problems the car runs great.

  7. #7
    Senior Member JonB's Avatar
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    There both great plugs just go which ever is cheaper.
    05 PBM GTO
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    Sold 01 z28

  8. #8
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    pewter
    99 Trans Am

    I just changed my spark plugs and went with the Ac Delco Iridium plugs and have noticed no difference between them and the Ngk copper plugs I was using. I just got tired of changing plugs every 10,000 or so miles, Now I don't have to worry about it for a long time. I don't have but 36,000 on my car and have had it 9 years, so you can see how long it will take me to get to 80 or 90,000 miles.No more cuts and bruises for a while.And again my car runs great.

  9. #9
    Member tyxpx's Avatar
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    Any of yall heard of the NGK Laser Iridium plugs?...I just found them on thier site.....

  10. #10
    Senior Member ss~zoso~ss's Avatar
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    SS: NBM, tan top
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    i have the ngk iridiums and i love em, did headers plugs and wires, and my fuel mileage increase from like 13 to 17 mpg around town

  11. #11
    Junior Member bspalmer's Avatar
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    I went with AC Delco earlier in the summer. Car had 50k miles on it. It was time. No problems with the new plugs. Make sure you use anti-seize on the threads and DO NOT OVER TIGHTEN THE PLUGS! If you strip out the threads it will probably be an expensive fix. Not sure about the GTO, but the F-car has some tough areas when changing plugs. "Remove one, replace one" is some good advice that I picked up fromm a board somewhere. You'll be po'd if you remove all of them at the same time and struggle to get them back in if you need to use your car right away. Good luck!

  12. #12
    member since may 2000 nhraformula's Avatar
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    plugs are plugs are plugs. gap them correctly and they will work well
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

  13. #13
    The Bandit Wesman's Avatar
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    Quote Originally Posted by nhraformula View Post
    plugs are plugs are plugs. gap them correctly and they will work well
    Can't say I agree with that. Iridium plugs are going to give you much better performance, efficiency, and longevity than old stype copper/resistor plugs.

    Considering what a pain it is to change plugs on an LS1 F-body, you'd be a fool to use crappy plugs that need to be changed 4 times as often as good ones.

    I use AC Delco Iridiums on my car. As someone else said, they are the same thing as NGK Iridium IX's.

  14. #14
    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Wesman View Post
    Iridium plugs are going to give you much better performance, efficiency, and longevity than old stype copper/resistor plugs.
    I disagree with the performance part of that.
    But otherwise you are correct.


    I run the basic V-Power NGK plugs. Can't see any reason to spend the money on the Iridium's since I change them them out every season or two anyways.

  15. #15
    Member {FzS}BlacKMagicK's Avatar
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    BlacK
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    You guys got any tips/tricks to get to those hard to reach ones?

    Think I might have some missing going on, man, I want those Granatelli wires...I like the idea of zero ohms.

  16. #16
    Formulatastic yellowv's Avatar
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    Quote Originally Posted by Mr. Luos View Post
    I disagree with the performance part of that.
    But otherwise you are correct.


    I run the basic V-Power NGK plugs. Can't see any reason to spend the money on the Iridium's since I change them them out every season or two anyways.
    +1. None of the guys I know that have 10 second F-Bodys run iridium plugs. They all run copper and change them often. Iridium will last longer but wont perform any better. Once you get it down plugs should only take 30 minutes to swap out. When I had my WS.6 I did plug changes every couple of months and it took me about 20 minutes or so. This one doesn't go to the track so it gets them every 15,000.

  17. #17
    The Bandit Wesman's Avatar
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    Quote Originally Posted by yellowv View Post
    +1. None of the guys I know that have 10 second F-Bodys run iridium plugs. They all run copper and change them often. Iridium will last longer but wont perform any better. Once you get it down plugs should only take 30 minutes to swap out. When I had my WS.6 I did plug changes every couple of months and it took me about 20 minutes or so. This one doesn't go to the track so it gets them every 15,000.
    So whats the advantage of running copper then?? Why not just use the Iridiums so that you don't have to change them nearly as often??

    That makes no sense to me at all.

  18. #18
    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by Wesman View Post
    Can't say I agree with that. Iridium plugs are going to give you much better performance, efficiency, and longevity than old stype copper/resistor plugs.

    Considering what a pain it is to change plugs on an LS1 F-body, you'd be a fool to use crappy plugs that need to be changed 4 times as often as good ones.

    I use AC Delco Iridiums on my car. As someone else said, they are the same thing as NGK Iridium IX's.
    try and find dyno numbers that say one make better power than the other, you wont.

  19. #19
    2 SS's are better than 1 Jays00ss's Avatar
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    just replaced mine with my header install 1,200 miles ago. I went with the AC Delco Iridiums. Love them and won't have to change for a while.
    2000 SS Camaro Heads, Large cam, Fast 90, 9"w/430's and locker, yada yada yada... you get the picture

    1971 SS ElCamino 402 Big Block 550HP

    2006 Silverado 2500HD 496 cubic inches of pure muscle

  20. #20
    Member {FzS}BlacKMagicK's Avatar
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    Performance can mean a lot of things, someone here said they got more miles per gallon, (but we don't know if he checked all of his old plugs for a fouled one)

    Doesn't always have to mean more horsepower, lasting longer is better performance all by itself, and if they last longer, doesn't that mean more money for mods?

    Your not shelling out as often, hell just not having to change them as often is a nice plus, if you trust that you can let them go as long as they claim they last.

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