Which plugs are best for performance?

Copper core plugs coated with nickel, platinum or iridium?

  • Total voters
    14
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dibbons said:
In 1971 I tried "fire injectors" (in a 383 Road Runner) that were advertised by J.C.Whitney mail order to increase horsepower, fuel mileage, and even raise the idle speed because they burned more of the raw fuel. Liars.
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Thank you for playing the game.
I read the same BS in the Warshawski/Whitney catalogs and never bit.
But they wrote some great copy to sell them plugs...
 
Want to know what to run
318willrun said:
Now this here is a flat out lie! If the only plug available was a Champion, trust me, you be putting them in your cars :D
P.S. - I've over the years tried them all for long life and performance. Champions give up nothing to nobody.
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Once AGAIN your WRONG Champion suck!!! wouldn't be caught dead running them in anything i own..not even the lawnmower:D:D
 
stroked340 said:
Want to know what to run



Once AGAIN your WRONG Champion suck!!! wouldn't be caught dead running them in anything i own..not even the lawnmower:D:D
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Ok... I'll go pull 'em all out right now
 
stroked340 said:
Once AGAIN your WRONG Champion suck!!! wouldn't be caught dead running them in anything i own..not even the lawnmower:D:D
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If you can't get Champs to run great in your engine, your doing something incredibly wrong.

Speaking of which, how's the rebuild coming along?
 
I ran autolite plugs for years in all my motors, still do in most. I switched to NGK in the nasty big block and found they cleanout better than autolites, when I don't get the motor lit on the first fire. 7 and 8 are a bear with the single plane.
 
stroked340 said:
Want to know what to run



Once AGAIN your WRONG Champion suck!!! wouldn't be caught dead running them in anything i own..not even the lawnmower:D:D
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everything sucks according to you. do you even know how to operate a mower ?
 
As a Mopar Partsman, I can tell you that your old Mopar came with Champions. My experience tells me to stick with the Champions. I've seen far to many cars puke up anything other than what Mopar sent the cars out with. As for the folks who swear by the NGK's, I think it's mental. Both brands are distributed by Federal-Mogul and the NGK line is primarily an import line. However with the heavy use of Mercedes designed engines in newer Mopar's you will see NGK's used a bit.
The only time I would ever suggest the use of the platinum or iridium plugs over copper core is for longevity reasons. When you have to remove a intake plenum and most of the upper engine to replace plugs, you don't want to do it every 30 to 60 thousand miles. Copper is a far better conductor, they just wear out faster because of that fact.
In the end, it's your car and do what you want.
 
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Yup. I remember back in the 70s NGK was foreign cars only.

gunbunny said:
As a Mopar Partsman, I can tell you that your old Mopar came with Champions. My experience tells me to stick with the Champions. I've seen far to many cars puke up anything other than what Mopar sent the cars out with. As for the folks who swear by the NGK's, I think it's mental. Both brands are distributed by Federal-Mogul and the NGK line is primarily an import line. However with the heavy use of Mercedes designed engines in newer Mopar's you will see NGK's used a bit.
The only time I would ever suggest the use of the platinum or iridium plugs over copper core is for longevity reasons. When you have to remove a intake plenum and most of the upper engine to replace plugs, you don't want to do it every 30 to 60 thousand miles. Copper is a far better conductor, they just wear out faster because of that fact.
In the end, it's your car and do what you want.
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Dart Thomas. Yes, I have a bunch for /6 engines.
 
I run Champion N12YC plugs. Since I don't have a radio I do without the Resistor. Its function is to control electromagnetic interference. In a racing engine with an MSD ignition it will slightly lower the energy delivered at the plug gap.
 
I think the most important factor is having a large gap ( which means a high energy ignition system). The larger gaps produces a larger flame front to initiate ignition. The details discussed here, copper etc are minor compared to this.
I have only had quality issues with one brand and that was Champion, had a part throttle misfire with new plugs and put in another brand & it was fixed.
 
Darthomas said:
Did Champion ever make plugs branded Mopar?
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Sure did, but they are Champion plugs.
Also keep in mind that the "N" in NGK stands for Nippon.

sparkplug1.jpg
 
318willrun said:
Ok... I'll go pull 'em all out right now
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Dude, you don't realize those champions are costing you horsepower? For gods sake man, don't piss away power.





























Ok, I'm bullshitting you. Been using Chamion plugs since 1972 when I got my first dirt bike. I never do a tune up with any other plug than a Champion. NGK read differently. The Autolite race plugs are ok to read.


If you can't make a champion plug run, you probably think a vacuum secondary Holley is a race carb. A piss poor craftsman blames his tools. A piss poor tuner blames his plugs.
 
You want to know what works..go to the track and see what people who actually race and KNOW how to tune and know what plugs work use..majority of cars(if you can find any)WON'T be using Scampions=garbage!!!
 
stroked340 said:
You want to know what works..go to the track and see what people who actually race and KNOW how to tune and know what plugs work use..majority of cars(if you can find any)WON'T be using Scampions=garbage!!!
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I've gotten a bad one, once, many moons ago. Not changin my mind.
Can't quite afford 16 right now....but I want my current car to have them.
I like nickel plate but platinum is good.
 
SSVDP said:
I think the most important factor is having a large gap ( which means a high energy ignition system). The larger gaps produces a larger flame front to initiate ignition. The details discussed here, copper etc are minor compared to this.
I have only had quality issues with one brand and that was Champion, had a part throttle misfire with new plugs and put in another brand & it was fixed.
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Plug heat range may have been too hot.
I had one instance where the insulator came loose ,luckily the tang/strap held it and it didn't go bouncing in the cylinder.
I'll run any plug that's easily readable, nickel coated. I prefer NGK V power, once heated some they read like any other plug in the correct heat range, so don't buy into that garbage hear say. What's more important is that no matter what brand you use...you select the proper heat range.
 
I'm curious to hear what failures were experienced with spark plugs, for example many years ago when I used Champions the electrode would wear and missfire with less than 10k miles but other brands would last longer. I haven't seen it first hand but I've heard of ground straps breaking off of Bosch plugs.
 
Been using rn12yc champions in my dart always worked fine! Tried bosh platinums once, those were junk! Did not last. Idle was dirty,etc..
 
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