I can not find the part number, I found the 1 step colder irridium BKR7EIX-11 but I would like to use a copper core plug 1 step colder. Does anyone have a part number?

 

Autolite makes one. Part Number XP3923 http://www.power-21.com/honeywellpow....aspx?b=A&vt=1

 

Here's a cross reference chart

 

Sorry, I just realized that's not for 1 colder. It should be this one 3922 http://www.power-21.com/honeywellpow...-11%20&em=True

 

Looks good, thanks for the info!

 

I believe MDSRT6 uses copper plugs also.

 

I think im going to go with these plugs too.....

 

Autozone carries them for $1.74 each!

http://www.autozone.com/R,101878/ini...ductDetail.htm

Found them at advance auto parts, 12 of them for $20.28. I will pick them up in the morning.

 

I must be out of the loop but why use a copper plug? Is it only because its 1 step colder and just happens to be copper?

I thought platinum plugs with iridium tips were needed for a more focused spark due to the chance of spark blow-out in a super/turbocharged engine.

Considering MB spent the $$$ on iridium tips from the factory, when car companies usually skimp on parts used, makes it seem like its important?

 

copper plugs are better for forced induction cars but they do not last as long.
http://www.lextreme.com/sparkplug.html
http://www.lextreme.com/sparkplug.html

i am off to go pick mine up now.

 

Now that is weird. You learn something new everyday....

 

So sad. Right after reading this thread and doing a little googling I went out and bought copper plugs, despite spending $70 on iridium a month ago. Haha.

anyways, ill be in the garage if you need me.

 

Quote:

Originally Posted by mrphotoman

…I will pick them up in the morning.

Did you get them installed? Notice any difference?

When I swapped in Denso’s IK22s shortly after its evosport ODPS upgrade, their affect was negligible. Surprisingly, the original equipment IFR6D10 NGK’s, at ~50k miles, were in excellent condition and within .03” of their .039”/1.0mm specification.

Quote:

Originally Posted by ohnoesaz

…anyways, ill be in the garage if you need me.

lol. Enjoy a cold one before updating this thread.

 

The idiots at advance auto did not order them yesterday like they said they would. i told them to order them AGAIN and they promised they would be here tomorrow. I was not too happy, hopefully i can get them in tomorrow.

 

What kind of mileage can you expect out of copper plugs? Do you "read" your plugs often? The NGK IX plugs seem to get good reviews, so I am just curious about the potential incremental benefit to using copper ones... the only downside being more frequent change intervals, from what I gather. TIA!

 

i would think around 12,000 to 15,000 miles or so.

 

Soooo

I did not install my copper stock heat range plugs like I thought I would. I started figuring that I won't even see much performance difference over iridium, but that I'll have to check the coppers often and replace them in 10-15K miles. Didn't seem like a good idea.

The fact that platinum/iridium plugs get so hot and hold heat in does make me want to do the switch, but I dont know, everything is running fine so I decided to just keep my autolite iridiums.

So now the big question is...... Could you put a copper and an iridium in the same cylinder? THen you have a plug that's better for performance, cools itself better and prevents detonation, while also having a plug next to it that will last a long time just in case the copper one dies away. Hedging your spark plugs. Then you only have to mess with half the plugs regularly.

And most importantly you get that placebo effect of everything in the world being perfect.

Bad idea?

 

Quote:

Originally Posted by mrphotoman

... hopefully i can get them in tomorrow.

How are you liking its fresh set of plugs?

 

I went to colder plugs in my turbo charged cars in the past. All I did with my SRT-6 is change the original stock plugs gaps to .034 and it seems to be working perfectly. I can't complain considering I turned a time of 12.1 @114 mph twice with the few mods I've done! So I'll stick to my originals which will not have to be changed as often as the copper's, especially when it's a big pain in the ars to me changing them.

 

they work great, it is a pretty simple job to swap them out. the 1 step colder will work great with the higher boost and in the future if i decide to go with a small shot of nitrous.