FYI
I just pulled my plugs and found cylinder #1 plug with the tip missing Isn't this what happened to Mike M.?

Looks like I'm sticking with copper, BKR6E-11

 

Yes, here is the picture that I just heisted from his photopoint, thanks Mike ...
Austin





[Modified by Austin, 5:40 PM 8/14/2001]

 

what's an "iriway"?

 

I think you're being a smartass, but if you're not...it was supposed to read Iridium

 

The NGK Plugs are called Iriway, they have 3 or 4 different kinds of Iridium plugs with different names

 

Ok double checked, there are 4 Types NGK Iridium IX, IriWay, IriTop, and IriMac
The last 3 are just different heat ranges and Types
Heres the Link http://www.ngkntk.co.jp/pluginfomati.../iri_plug.html

 

Woops, no wonder I thought he was talking about the Denso Iridium I had thought he misstyped the word...damn it, those NGK names kind of make me laugh though.

Mike's car was running the Denso Iridium plugs...Thanks Geo for the correction.
Austin

 

Chad,

Do you know what happened? I'm checking mine tomorrow.

 

Can somebody who can read japense translate what is going on at that site? Babelfish is well, babbling...

I know the IX is offered here in the US, but I'm not sure waht the rest of the stuff is--the Iriway plugs are the original Ir plugs from NGK I believe.

Thanks!

-Geo

 

I'm hoping I popped the top "iridium tip" off when I was gapping them, but as I check things rather throughly, I'm afraid that might not be what happened.

Plugs were the NGK Iriway 7. I sent Dan P. pics, not good pics but hopefully he will post them.

 

They are pretty bad pics but I'll post if you like. I have to wonder if the Iridium plugs are supposed to be changed more frequently than regular plugs. Seem to be a lot of failures. Thankfully Chad's motor is fine.

 

Be absolutely certain that the cause wasnt detonation.
That is the usual cause for that sort of thing

 

Yep, I agree with detonation! When splitfires first came out I slapped a set in my 91' Eagle Talon TSi, within 1000mi the spark plug in the #4 cylinder had exploded.

I took the plugs back and got new ones from the autoparts store under warranty and they did it again about 50 miles later. I guess thats what you get when you run 21psi of boost on a stock turbo.. I then replaced the plugs with NGK in a colder heat range and never had a problem again.

 

Doesn't NGK have a "read the plug" page with examples of rich, lean, oily, etc plugs?

 

what do yours look like?

 

Not a beautiful golden brownish tan, but leaning more toward a whiteish color, especially the #1 cylinder which had the "tip" missing.

 

If you run iridium plugs, I would suggest changing them more often. I was just reading an article on them over the weekend. They last as long as the manufacturer claims they do, but what they don't tell you is that by the end of their lives, it'll be nearly impossible to remove easily.

 

If I can recall whitetish color means too much heat in the combustion chamber. You need to run more rich or use a colder plug.

 

white = lean

colder plug isnt gonna help.

never seen an NA motor melt the electrode off a plug before.

PLEASE take a pic