KA24DE spark plugs? searched, not a n00b question.

[paysonboy801]

another reason you shouldnt use bosch on a nissan is because the threading is a little different, not alot but its enough that after a long enough time you end up having to run a tap and die set because it stripps out the alluminum threading each time not alot but enough, and since its the head and you have to do drilling for a tap and die set you have to remove the head to do this, so just think a little 20 dollar part could turn into a few hundred dollars if you do all the work yourself

[0wn3r]

another reason you shouldnt use bosch on a nissan is because the threading is a little different, not alot but its enough that after a long enough time you end up having to run a tap and die set because it stripps out the alluminum threading each time not alot but enough, and since its the head and you have to do drilling for a tap and die set you have to remove the head to do this, so just think a little 20 dollar part could turn into a few hundred dollars if you do all the work yourself

did you hear this from somewhere or experience it yourself? just curious

[ddgsxr504]

another reason you shouldnt use bosch on a nissan is because the threading is a little different, not alot but its enough that after a long enough time you end up having to run a tap and die set because it stripps out the alluminum threading each time not alot but enough, and since its the head and you have to do drilling for a tap and die set you have to remove the head to do this, so just think a little 20 dollar part could turn into a few hundred dollars if you do all the work yourself

I call it!

[Chezedik]

There isn't, the truth (or at least the marketing) tells us that platinum is a harder metal than copper, and iridium is harder than platinum. Question answered. No?!?

Okay, every time the plug fires, a little bit of the electrodes are burned away. Logic would tell us that the harder metal would take longer for this to occur. I would be inclined to agree only because the OEMs made a big switch to platinums and later to exotics like iridiums. But there could be a thousand other reasons for this. The idea is that since copper is softer, it burns away faster. There would also seem to be a lot of anecdotal evidence to support this. Also, we know that melting points get higher with each different metal, so maybe that helps.

Double platinum is when they treat the center and ground electrodes to a does of platinum, instead of just the center. This is said to further increase plug life (and increase cost)

Although, the temperature inside of a spark is more than most of us can imagine, and still more than these more exotic metals can handle.

There is no real reason you can't use any plug for any application. Platinum does not have a chemical reaction inside the combustion chamber with NO2 that makes it incompatible. That is just the experience from the guys at NGK.com, whom are not part of the corporate structure of NGK. So those are strictly opinion, and anectdotal evidence. I have been told before that you can't use iridium on turbo or NO2 apps because the tend to cause detonation caused by the center electrode glowing red hot. Guess what, this happens all day with copper and platinum plugs, too. This is a big problem causer for ping. The fix, colder plugs, pure and simple.

Multiground plugs will not make any difference, nor is it likely that finewire will make any significant difference. There are two things you need to know about spark: it jumps to the shortest point possible (physics you don't care about, keyword ionization) and it tends to jump from and to sharp edges (I can't explain this one, maybe someone else can). So finewire may be of added benefit due to the sharp edges being so close together.

But if there is a difference in the order of nanometers, then a spark will jump to the shortest point on your fancy multiground plug, meaning you paid for n-1 more than you needed.

Those are the facts! Now, my two cents. I am going to be turbo'ing my KA during spring break, and you know what I am going to run for plugs. NGK V-power. Why? I don't know, I have always used NGK's, and they are cheap. If I foul it out, it will not drive me to drink.

Nissan suggests using platinum for longer plug life, and NO OTHER REASON.

[0wn3r]

was iridium really popular enough in 97 for them to be able to test and/or recommend using it?

isn't iridium like a type of copper?

[180fan]

Iridium is another element. Check out the periodic table with the atomic number 77 to find out more about it.

Iridium's very hard but very brittle which is why they say not to gap them with the gapping tool that has a loop at the end and you pop out.

Iridium is popular with low maintainence cars. I was pretty surprised to find that my sisters Corolla uses iridium plugs and has a service interval of 60-90k miles. Awesome.

[Chezedik]

Yeah, I broke one that way once before I knew that. Score another one for the V-Powers.