Spark plugs for the Kizashi

[bootymac]

I have some spare IX plugs sitting around. I'll see if I can compare them to the Laser plugs. My current assumption is that they're the same and the only difference is the ground electrode

[KuroNekko]

I have some spare IX plugs sitting around. I'll see if I can compare them to the Laser plugs. My current assumption is that they're the same and the only difference is the ground electrode

Good idea.
My understanding of the main difference between the IX and the Laser is that the ground/side electrode has platinum on the Laser while the IX is the standard nickel.

http://www.ngksparkplugs.com/pdf/DYK_La ... m%20IX.pdf

[bootymac]

Yup, the center electrode is 0.6-0.7mm on both of my IX and Laser plugs. The only difference is the ground electrode.

[redmed]

Yup, the center electrode is 0.6-0.7mm on both of my IX and Laser plugs. The only difference is the ground electrode.

One or both are .4mm. Check this out.
http://densoiridium.com/laserwelding.php

[bootymac]

Yup, the center electrode is 0.6-0.7mm on both of my IX and Laser plugs. The only difference is the ground electrode.

One or both are .4mm. Check this out.
http://densoiridium.com/laserwelding.php

The Iridium IX and Laser Iridium plugs in question are NGK and not Denso. I measured both tips with calipers and they were between 0.6-0.7mm.

Interesting that Denso has thinner tips though!

[redmed]

Your right bootymac, I was looking over Iridum plug stuff trying to determine if other brands than Autolite are Iridium "enhanced" and I remembered that I saw .4 mm in my travels. I checked my browser history and found that page on my first look so I just posted it. Now I see it was for the Denso plug while you where talking of NGK plugs, sorry.

I also saw something about a thinner electrode giving a better spark.
To help improve ignitability DENSO minimized the portion of the ground electrode that comes in contact with the flame nucleus. Because the area of the ground electrode where the tapered cut comes into contact with the flame nucleus is small, the heat lost to the electrode is lessened and firing performance improves dramatically. The surface area and weight of the ground electrode tip is reduced along with the load in terms of heat and vibrations. This means the spark plug can cope with heavier driving conditions.
I also read that the Denso plug is not just Iridium but mixed mixed with Rhodium.

[Woodie]

99% of this is puffery. Just like the gas companies trying to convince you that their gas is better than every other brand, when it all comes out of the same tanks.

The only difference here is how long they last, regular plugs around 30K, platinum plugs 60K, and iridium plugs around 90K miles. At the same time that the spark plugs' job got easier, all of these exotic claims came about. With the quality of the modern fuel injection and ignition systems, rubbing two sticks together would probably get the job done.

[redmed]

There are differences. Like you said "The only difference here is how long they last, regular plugs around 30K, platinum plugs 60K, and iridium plugs around 90K miles." These differences are due to the construction of the plug which is what we where discussing. I have had plugs foul and others last longer in the same engine.

[bootymac]

Woodie probably meant there's no difference in performance, which I agree with.

[murcod]

Yep. Simply replace them as required for whatever type you've bought.