Better spark plugs? - Page 2 - Dodge Challenger Forum: Challenger & SRT8 Forums
General Challenger Discussion This section contains general discussion about the Dodge Challenger. If it does not fit into a more specific area, it probably belongs in here. (Dodge Challenger General Discussion)

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post #11 of 20 (permalink) Old 05-13-2019, 06:32 PM Thread Starter
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I’m not expecting a performance gain. I think you nay sayers aren’t hearing me
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post #12 of 20 (permalink) Old 05-13-2019, 06:37 PM Thread Starter
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I’m simply putting in a superior set of spark plugs. That’s it. I replaced the BRAND NEW spark plugs in my mustang when I got that car (less than 2000 miles them probably) and it made a world of difference in how it idled and ran as a whole. So, I’m attempting to get the same results here, with the same plugs in a different car.
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post #13 of 20 (permalink) Old 05-13-2019, 06:45 PM
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There's nothing wrong with your factory plugs, and it would be a waste to change them.


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post #14 of 20 (permalink) Old 05-13-2019, 10:33 PM Thread Starter
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There was nothing wrong with the plugs in my mustang. Yet, the level of difference was 10 fold better. I’m not saying my factory plugs are defective in any way. Who doesn’t understand the definition of “better” plugs. I don’t get where the confusion is.
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post #15 of 20 (permalink) Old 05-14-2019, 12:17 AM
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I think the fact your car already has the 'better' plugs may have eluded you.

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post #16 of 20 (permalink) Old 05-14-2019, 01:35 AM
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Quote:
Originally Posted by AttackHelicopter View Post
I’m simply putting in a superior set of spark plugs. That’s it. I replaced the BRAND NEW spark plugs in my mustang when I got that car (less than 2000 miles them probably) and it made a world of difference in how it idled and ran as a whole. So, I’m attempting to get the same results here, with the same plugs in a different car.
Short answer: you won't see any increase in performance by changing to a different spark plug from what's in your Hemi now.

Long answer: the dual spark plugs per combustion chamber on the Hemi's effectively reduces the spark plugs' electrode material to being relevant for longevity only. So no matter if you run the standard copper core, platinum, double platinum, or iridium plugs, it is unlikely that changing to a different type of plug will yield any benefit as far as the individual combustion events are concerned.

There is some difference between brands possibly, but even then, I think most everyone agrees that NGK is the top of the line...and you already have those.

If you were able to get some extra oomph from a different set of plugs in the new-ish Mustang's engine, that could theoretically be attributed to the difference in (quality of) the spark plugs' brand and/or center electrode material I guess. However, that difference is negated with the dual plug setup in the Hemi I'm thinking.

2 of a lesser plug will equal what 1 of a better plug can do when it comes to exploding air/fuel mixtures.

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post #17 of 20 (permalink) Old 05-14-2019, 05:27 AM
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Originally Posted by AttackHelicopter View Post
There was nothing wrong with the plugs in my mustang. Yet, the level of difference was 10 fold better. I’m not saying my factory plugs are defective in any way. Who doesn’t understand the definition of “better” plugs. I don’t get where the confusion is.
Hyperbole is great, but you're ignoring facts. The confusion is why you think you'll see any gains.

Did you previously own a turbo Honda with a Shanghai spinny boi on it?


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post #18 of 20 (permalink) Old 05-14-2019, 09:34 AM
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Originally Posted by AttackHelicopter View Post
There was nothing wrong with the plugs in my mustang. Yet, the level of difference was 10 fold better. I’m not saying my factory plugs are defective in any way. Who doesn’t understand the definition of “better” plugs. I don’t get where the confusion is.
Confusion or lack of comprehension is on your part.

You asked and you were told by several folks that aren't confused with your question, and aren't lacking any comprehension either. Lol


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post #19 of 20 (permalink) Old 05-14-2019, 01:26 PM
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Yup. The 4469’s. All 16 of em. The ones in the challenger from what I understand are just basic copper tipped ones. The IX’s are the max performance ones.
This could be the cause of your frustration, your '19 R/T came with NGK Iridium plugs from the factory, they stopped using the copper plugs in '13.

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post #20 of 20 (permalink) Old 05-14-2019, 10:42 PM Thread Starter
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Now if they already have the 4469 iridium plugs in there then I stand corrected. So far I’ve been lead to believe they had coppers in them. And again to everyone else, I’m not looking for a performance gain here. If I already have the iridium plugs and not the copper, then I’ll send em back. I haven’t pulled my current plugs yet to even see.
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