C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

The Best Spark Plugs?

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Old Apr 25, 2004 | 12:00 PM
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Default The Best Spark Plugs?

I'm putting a new engine in my 96 LT1. I just put my NGK plugs in back in 2002 but I figure I should just go ahead and change them out while I'm at it. So...what is the best plug for my LT1 according to the forum? :thumbs:
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Old Apr 25, 2004 | 12:01 PM
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Default Re: The Best Spark Plugs? (TorchRedXCVI)

NGK Iridium. I have them, and they are great.
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Old Apr 25, 2004 | 12:07 PM
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Default Re: The Best Spark Plugs? (bogus)

Denso Iridium IT20's work real well in my car.
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Old Apr 25, 2004 | 12:11 PM
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Default Re: The Best Spark Plugs? (TorchRedXCVI)

My choice....The correct AC Delco for your car.....My 95 LT1 has 71000 miles on the original plugs and still runs 85 mph in the 1/8
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Old Apr 25, 2004 | 04:47 PM
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Default Re: The Best Spark Plugs? (pettvette)

:iagree:

Chevy engines like Chevy plugs. I have used other brands in carbed Chevy's, and always had problems. Never tried with this EFI motor, however, maybe EFI is more forgiving.
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Old Apr 25, 2004 | 05:55 PM
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Default Re: The Best Spark Plugs? (TorchRedXCVI)

I just put Delco Rapidfire #14 in, and the car seems to like 'em (so far).
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Old Apr 25, 2004 | 06:51 PM
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Default Re: The Best Spark Plugs? (bogus)

NGK Iridium. I have them, and they are great.
:iagree: Just don't use the AC Delco platinums as the pucks can fall off and give you a huge gap and a lousy running engine.
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Old Apr 26, 2004 | 08:44 AM
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Default Re: The Best Spark Plugs? (Strick)

Go with NGK standard plugs

Stay away from the high priced gimmick plugs. Bosch + 4's, Splitfires, NGK Iridiums, etc.

Some will disagree here, but NGK Iridiums, while working great on a perfectly running car, tend to foul quickly if something like an O2 sensor goes out - leaving you with a no-start conditions. I replaced the plugs....with expensive NGK TR55 IX (Iridium plugs) and had the same thing happen, before I realized I had a faulty O2 sensor. So now I am down over $100 in SPARK PLUGS.

IMHO, Id rather have the piece-of-mind knowing if I was out somewhere away and an O2 sensor failed, Id be able to limp home instead of being left with a no-start condition.

Just my $.02

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Old Apr 26, 2004 | 08:54 AM
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Default Re: The Best Spark Plugs? (dizwiz24)

Go with NGK standard plugs

Stay away from the high priced gimmick plugs. Bosch + 4's, Splitfires, NGK Iridiums, etc.

Some will disagree here, but NGK Iridiums, while working great on a perfectly running car, tend to foul quickly if something like an O2 sensor goes out - leaving you with a no-start conditions. I replaced the plugs....with expensive NGK TR55 IX (Iridium plugs) and had the same thing happen, before I realized I had a faulty O2 sensor. So now I am down over $100 in SPARK PLUGS.

IMHO, Id rather have the piece-of-mind knowing if I was out somewhere away and an O2 sensor failed, Id be able to limp home instead of being left with a no-start condition.

Just my $.02
that is odd... I have always been under the influence that a super fine electrode would have been less prone to fowling...

I have been running the NGK's since they came out - about 2 years? Well over 35k miles, and they are fine.

Then again, I did just replace the O2s... :D

Which reminds me, they are due again!
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Old Apr 26, 2004 | 09:12 AM
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Default Re: The Best Spark Plugs? (bogus)

Go with NGK standard plugs

Stay away from the high priced gimmick plugs. Bosch + 4's, Splitfires, NGK Iridiums, etc.

Some will disagree here, but NGK Iridiums, while working great on a perfectly running car, tend to foul quickly if something like an O2 sensor goes out - leaving you with a no-start conditions. I replaced the plugs....with expensive NGK TR55 IX (Iridium plugs) and had the same thing happen, before I realized I had a faulty O2 sensor. So now I am down over $100 in SPARK PLUGS.

IMHO, Id rather have the piece-of-mind knowing if I was out somewhere away and an O2 sensor failed, Id be able to limp home instead of being left with a no-start condition.

Just my $.02

that is odd... I have always been under the influence that a super fine electrode would have been less prone to fowling...

I have been running the NGK's since they came out - about 2 years? Well over 35k miles, and they are fine.

Then again, I did just replace the O2s... :D

Which reminds me, they are due again!
It's the super fine point that makes it foul quicker. On a normal plug if you start to deposit crap somewhere on the firing end, it can fire around it, you can then possibly get it hot enough to burn off the garbage.

I've heard that before about platinum plugs, on a perfectly running stock engine, go for it, but on an engine that might not have the 100% perfect A/F ratio all the time you're better off with normal plugs. It was due to the size of the firing tip. I can only assume that the problem would be amplified by the smaller tip of the Iridium plugs.

I don't have any personal experience witht he matter but I have heard it before. Personally I can't justify $100 for a set of spark plugs. If you figure a normal set of plugs will last 30,000 miles and I can get them for $11. That's 300k miles worth of spark plugs before I equal the cost of the high dollar plugs.
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