spark plugs

[avcts]

FYI,

For anyone who cares, I called NGK Engineering. I know its all over various sites..but the ZFR6FIX-11 doesnt exactly match OE plugs. The projection distance is not the same as OE specifications. However, the heat range is the same. DC uses the plug RC12ECC to get the flame "more down inside" the combustion chamber. I do realize that alot of people are using the NGK plug with no ill effects. NGK assured me this is the closest plug you can use in the IX line. Its a good plug to use and works fine in our motor. However, it was NOT specifically engineered for our application. The closest NGK plug to use is PZFR6J-11. Mine are on order.

 

[avcts]

I have a brand new set of the IX. Again, they're fine to use but I want OE. 65.00. This includes shipping to anywhere in the CONTINENTAL US. I will include the original receipt for warranty purposes as well. Please PM me. Thanks.

 

[Bone]

FYI,

For anyone who cares, I called NGK Engineering. I know its all over various sites..but the ZFR6FIX-11 doesnt exactly match OE plugs. The projection distance is not the same as OE specifications. However, the heat range is the same. DC uses the plug RC12ECC to get the flame "more down inside" the combustion chamber. I do realize that alot of people are using the NGK plug with no ill effects. NGK assured me this is the closest plug you can use in the IX line. Its a good plug to use and works fine in our motor. However, it was NOT specifically engineered for our application. The closest NGK plug to use is PZFR6J-11. Mine are on order.

I'm not sure who you talked to, but your ZFR6FIX-11's are hotter not colder than BKR7EIX-11's. The higher the 4th character/number the colder the NGK plug.

How do I find a colder or hotter plug?

First, consult the NGK numbering system page,(listed on the bottom left of the 411 info page), you should be able to see which digits identify the heat range for your spark plug.
EXAMPLE: The heat range for a BCPR6ES-11 is the "6" (ignore the -11, it is the gap)
After you have identified the numbering system for your plug, merely raise or lower that number to change the heat range.
REMEMBER, NGK PLUGS GET COLDER THE HIGHER THE NUMBER, HOTTER THE LOWER THE NUMBER.

Say you are starting with a BKR6E-11
if you want a colder plug, you would use BKR7E-11
if you want a hotter plug, you would use BKR5E-11
(again, on non-racing plugs, the number after the "-" refers to the gap)

Once you have decided on a number, test to see if it exists by typing that number in the part #search. If it exists, you can add it to the cart.

If it does not exist, you will need to contact NGK customer service at (877)-473-6767 for further assitance

some other info on plugs:

Q14. Should I regap my Iridium spark plugs?A14. In most circumstances, no. The nature of Iridium spark plugs means that they are able to utilise a larger gap setting while actually requiring less voltage and straining the ignition system less. If you *have* to regap Iridium spark plugs (e.g if misfire occurs due to gap being too large) then do so with extreme care. Do not use a slide type gapping tool or put pressure on the brittle centre electrode in any way as it may become damaged.

 

[avcts]

I'm comparing the OE Champion plug to the zfr6FIX-11. The heat range between these two plugs are close. But that's not the issue. Its the projection distance and NOT the heat range. Heat range is the thickness or MASS of the porcelin insulator.

Again, I talked to an Engineer at NGK.

 

[Bone]

The closest NGK plug to use is PZFR6J-11.

Still has a 6 and 7 is colder on a similar series plug. Reference NGK, what can I say? Unless, it is a completely different plug.

The first character is A,B,C,D, J or R. No reference listed for Z.

2nd character
Z = Inductive Resistor
vs
K = Hex Size 5/8â€￾ rojected Tip (ISO)

I called 877-473-6767 and left a message.

http://www.ngksparkplugs.com/techinfo/spark_plugs/partnumberkey.pdf

 

[avcts]

Bone,

I really have no clue what you are gettin at.:dontknow:

You are talking heat ranges and Im not even concerned with that.

You're talking about 7 heat range plugs and Im comparing OE Champions to the ZFR6. There is a PHYSICAL length difference. The NGK's are fine to use but I do not fee l comfortable using something that does not meet OE standards. Thats all.

 

[Bone]

Dude, you have posted that you are worried that the NGK was too cold. I have been using a colder version than that with no issues.

If you are not worried about being colder why did you post this?::dontknow: :dontknow: :dontknow:

Well, I just pulled my rc12ecc's out and the ngk are a much colder plug. This plug does not appear to be an exact match.

OK, can someone please explain why the supposed cross is so much colder?

and this?

Just curious why colder? Are you using Force Air Induction? NO2?

You also asked the same plug questions on two different posts/threads? Seems like you really wanted the questions answered....just trying to help. Since I researched plugs for awhile now on our trucks, felt I should share.

Anyhow, I received my indexers from Moroso today, Part number: 71910.

 

[avcts]

Ok...now I see what you're saying. :idea:

Actually, I confused two different aspects of the spark plug.

1. Heat range
2. Physical Size or plug projection into the cylinder.

These aspecs are not the same. I thought there was a corralation. Im wrong.

The ZFR6FIX-11 is the correct heat range but is different in physical size. The NGK does not protrude into the cylinder as far as the OE. I want a plug that has the same specs as OE. This plug still should work just fine as most will attest too.

I called NGK and spoke with an engineer. He told me I had a valid question. He gave me the part number PZFR6J-11 is a very close match to OE specs. Summit sells them and a few others.

That answered my question that no one else could.

Maybe I was asking the question incorrectly? :hmmmm2:

But, thanks for tryin to help...for sure!

 

[Bone]

Taliban Dan talked to NGK today too after I gave it a shot but was put on hold/left a message. He was told the PZFR6J-11's were Platinum plugs (not iridiums) center fires and were hotter plugs than the iridiums BKR7EIX-11. And yes, (yours) they did extent a little farther "deeper" in the chamber.

 

[DRamSrt10]

but what is the different between hotter and colder plugs? What can it do? :dontknow: Educate me

 

[AWDisuzu]

try to swap plugs instead of using indexing washers. use the washers as a last resort, since the tips of the plugs will be at different lengths once you put the washers in.

~mike~

 

[avcts]

Awd,

Agreed. Yep.

I just came back from KS auto. I did buy a set of the washers and will only use them if I need them.

What's easily misconstrued is what heat range actually is. I honestly thought is was not only porcelain insulator thickness but the projection length as well. This projection length is the length of the white porcelain insulator past the threads of the plug.

Heat range is only the "mass" of the porcelin insulator and really has nothing to due with the length. A colder plug, or as Bone mentioned the NGK 7, has a thicker insulator so that more heat is dissipated as compared to a thinner insulator such as a NGK 6 series.

I hope I didn't confuse the sh!t out of some of us. I know I was there for a few minutes.

 

[Bone]

Here are the Moroso indexers.
Cost me about 20 bucks all together.
Part number 71910


There's nothing wrong with the thread, that's how we all learn. It's all good.

 

[avcts]

Exact same package I have sitting in front of me. 17.95 plus NYS freakin tax...damn it

My plugs will be in tomorrow. :dancing:

arty: :beer:

 

[dcrow]

so i am running a normally aspirated motor so what is the best plug for my truck?????

 

[Bone]

There is nothing wrong with stock copper champions.
Plats are a little more expensive and some say give a better spark and last longer.
Iridiums are the most expensive (about 6 bucks a plug) and are stronger, denser than the other materials. Supposively less energy to produce the same spark as coppers. Probably last longer too, but they haven't been around long enough to have extensive data on them.

The best tip would to have whatever plugs you go with clean, the right temp for the application, and properly gapped. You can keep asking the same question but there is no paramount answer for it. You've created yet again another thread when there are so many posts on the forum covering this subject.

 

[avcts]

Got a set of Iridiums for sale!!!! PM me if ya want them.