NGK Iridiums?

ChrismonDA

Well-known member
May 2, 2004
1,873
0
51
NC Johnston Co
Are you? Or are you going to install them? I would like to know also. But what many people do not realize is that Champions have always worked fine for me. This is not a high tech engine, Just a small block Buick. I have even used AC Delco in my D1's without any issues.
 

STLGrrover

Member
Jan 23, 2013
21
0
St. Louis, MO
I'm not currently running them, but was intrigued and curious how long they are lasting and if there is really a reduction in carbon buildup or fouling compared to coppers and platinums.

I started getting some intermittent misfires on startup a couple of weeks ago, and was thinking I'm probably due for plugs and wires. 4 yrs on a set of Magnecores, a little over 25k, 3 yrs on a set of E3.48, over 20k on those. So, I've got a set of 8mm Kingsborne on order and was just weighing options on plugs.
 

kennith

Well-known member
Apr 22, 2004
10,891
172
North Carolina
I use them.

The hardness of iridium allows for a smaller electrode, which is less likely to suffer contaminant buildup. This is a pretty good property in an engine that is often hamstrung by people who don't operate it aggressively enough, as well as poor quality modern fuel, and emissions requirements that just plain back things the fuck up.

Also, it is almost entirely immune to corrosion in terrestrial environments, and is a perfectly acceptable conductor. It will hold a sharp edge longer than other options, and it will stay smoother, furthering the reduction of contaminant buildup.

It's not a magic power pill, but iridium in a plug is certainly a good thing if it's in the budget. I consider it a reliability upgrade in a great engine that's got a nasty habit of running dirty, especially around people who don't maintain it properly.

Anything iridium or above is good enough to light the fuel. It's getting a spark one way or another. Also, electricity has a nasty habit of only arcing from one location... So, this nonsense about plugs with ground electrodes hanging all over them is worthless.

Sparks plugs are all about contamination prevention, service life, and consistent, predictable performance. That's why I use iridium electrodes.

I also gap the damned things properly. Gap your fucking spark plugs, people. Use the factory guidelines, and adjust as required for any changes you've made (such as swapping plugs), and take the preferences of your particular engine into account.

You don't need iridium plugs. Run what you want. Just avoid bullshit. Go for copper, properly chosen, and with no fancy tricks. Gap them properly, and you're good.

If you want to take that next step, it's up to you.

Cheers,

Kennith