Not allowed access to Spark Plug Replacement Guide thread.

[Tyler8]

Whenever I try to go to this link: http://www.audizine.com/forum/showth...lacement-Guide

it says I don't have sufficient privileges to view the content. I used to be able to view it, I don't know what happened. Could a moderator please fix this for me?

[Jake@JHM]

What questions do you have about spark plugs? I would be more than happy to help you out.

I also have some good spark plug info HERE

Jake

[Charles.waite]

What questions do you have about spark plugs? I would be more than happy to help you out.

I also have some good spark plug info HERE

Jake

This!

The info Jake has spelled out is actually MUCH MUCH better than that Spark plug thread. Its honestly almost completely wrong anyway. Jakes info is correct and more applicable to the 2.0t.

[Tyler8]

What questions do you have about spark plugs? I would be more than happy to help you out.

I also have some good spark plug info HERE

Jake

If I remember correctly, that thread had a lot of information about the different heat ranges of the plugs. I'm trying to determine which one I should try. I'm running about 20psi boost with BKR7E's which work fine, but I hate having to change them every 8k miles or whatever. Was thinking about going back to the Bosch plugs, maybe one step colder. Any suggestions? And thanks for that link, seems like some good info in there.

[Charles.waite]

If I remember correctly, that thread had a lot of information about the different heat ranges of the plugs. I'm trying to determine which one I should try. I'm running about 20psi boost with BKR7E's which work fine, but I hate having to change them every 8k miles or whatever. Was thinking about going back to the Bosch plugs, maybe one step colder. Any suggestions? And thanks for that link, seems like some good info in there.

You could get the BKR7EIX plugs. Theyre Iridiums and last 30k miles or so. I'm running them in my b6 (stage 1+ 21psi) and my stock b7.

[Jake@JHM]

This!

The info Jake has spelled out is actually MUCH MUCH better than that Spark plug thread. Its honestly almost completely wrong anyway. Jakes info is correct and more applicable to the 2.0t.

Thanks!

If I remember correctly, that thread had a lot of information about the different heat ranges of the plugs. I'm trying to determine which one I should try. I'm running about 20psi boost with BKR7E's which work fine, but I hate having to change them every 8k miles or whatever. Was thinking about going back to the Bosch plugs, maybe one step colder. Any suggestions? And thanks for that link, seems like some good info in there.

For NGK Heat range 7 is going to be stock, and since your car is boosting more which in return is making more compression in your cylinders you are going to want to go with a colder spark plug.

I would recommend these:



FR5DTC

These are a great plug and very affordable and under $5 each. Heat range 5 for Bosch is one heat range colder than stock for the 2.0T!

Jake

[Tyler8]

You could get the BKR7EIX plugs. Theyre Iridiums and last 30k miles or so. I'm running them in my b6 (stage 1+ 21psi) and my stock b7.

It says you're running BKR6EIX in your signature though. That's one step colder correct? That's probably what I want I'm guessing.

[Jake@JHM]

It says you're running BKR6EIX in your signature though. That's one step colder correct? That's probably what I want I'm guessing.

A 6 for NGK will be one step HOTTER and not recommended for the 2.0T. However, 6 is stock for a 1.8t/2.7T.

[Tyler8]

Thanks!



For NGK Heat range 7 is going to be stock, and since your car is boosting more which in return is making more compression in your cylinders you are going to want to go with a colder spark plug.

FR5DTC

These are a great plug and very affordable and under $5 each. Heat range 5 for Bosch is one heat range colder than stock for the 2.0T!

Jake

Thank you very much! I will go with those! Hopefully you guy sell the red coil packs as well so I can just get the whole package from you.

[Jake@JHM]

Thank you very much! I will go with those! Hopefully you guy sell the red coil packs as well so I can just get the whole package from you.

Sure do!

http://jhmotorsports.com/shop/catalo...r8-p-2031.html

[Tyler8]

Sure do!

http://jhmotorsports.com/shop/catalo...r8-p-2031.html

Perfect! If I order right now will they be shipped out today? Hoping to have the parts as soon as possible.

[Jake@JHM]

Yeah it should! Worst case it will ship out tomorrow!

Jake

[Charles.waite]

It says you're running BKR6EIX in your signature though. That's one step colder correct? That's probably what I want I'm guessing.

No, for NGK 6 is actually hotter (bosch and ngk use reversed scales). 6 is the stock heat range for the 1.8t. I actually was running the BKR6 plugs in my b7 and the bkr7 plugs in my b6 until I realized NGK7 was the stock heat range for the b7 not 6. SO I just swapped them. I and getting some new plugs for my b7 shortly as they are -11 plugs and thus are gapped a bit too large so I'll swap the 7 range plugs back into my b6 when I change the plugs in my b7.

so many 6s and 7s in that paragraph, haha.

Edit: saw jake already answered.

[Hugh@EuropaParts]

We offer an ultimate ignition kit which is perfect for vehicles with upgraded tuning.

Ultimate Ignition Kit (2.0T)

A common problem on the 2.0T engines are misfires which are usually associated with a faulty coil pack or spark plug. A series of misfires will cause a check engine light to be displayed on your dashboard and substantially lower your vehicles gas mileage. Luckily it's an easy fix! Replace both coil packs and spark plugs to ensure proper ignition in your vehicle.

Coil Pack Options:

• Genuine OEM Revision F coil packs (Black color)
• Genuine OEM Revision E coil packs (Red color)
• Note: 07K905715F and 06E905115E ignition coils are identical. The only difference is color. Both are the latest revisions from Audi & Volkswagen.

Spark Plug Options:

• NGK Iridium IX (BKR7EIX) - one heat range colder than stock plugs, which is ideal for cars running aftermarket performance engine software.
• Latest OEM Bosch (FR6KPP332S) - original spec plugs, ideal for those looking to just replace OEM plugs.
• Latest OEM NGK Laser Platinum (PFR7S8EG) - one heat range colder than Bosch OEM plugs, double platinum laser helps with erosion over Iridium plugs.

These are in stock and ship same day, no surprises.

I just personally did these over the weekend again... had mis fires in cylinders 2 & 4 after 50k on stage 2+

[Axis]

For NGK Heat range 7 is going to be stock, and since your car is boosting more which in return is making more compression in your cylinders you are going to want to go with a colder spark plug.

Jake

NGK Iridium IX (BKR7EIX) - one heat range colder than stock plugs, which is ideal for cars running aftermarket performance engine software.

Confused here, 7EIX = one step colder or stock? Im saying this because I fooled some 8EIX, might because its really cold here sometimes or it might be my ignition timing thats off.

[Jake@JHM]

7 is the stock 2.0T heat range for NGK. If you want to go one step colder using an NGK plug, you will go to 8.

Jake

[Hugh@EuropaParts]

Confused here, 7EIX = one step colder or stock? Im saying this because I fooled some 8EIX, might because its really cold here sometimes or it might be my ignition timing thats off.

7 is one step colder... trust me.

If you don't trust me google it... or search on audizine... or ask any off the shelf tune companies.

[Charles.waite]

7 is one step colder... trust me.

If you don't trust me google it... or search on audizine... or ask any off the shelf tune companies.

Or, you know, go to NGK's website.....

[Jake@JHM]

Sorry but, heat range 7 for NGK would be one step colder for the 1.8T/2.7T, which is a lower compression engine. FSI engines are higher compression, and higher compression creates more heat so you need a colder spark plug to dissipate that heat.

http://www.ngksparkplugs.com/part_fi...uv/default.asp

Go through the steps to choose a B7 A4 2.0T and you will see that the only plug is a heat range 7.

[A-BlacK_MambA-4]

I followed Jakes advice a while back and went with NGK BKR8EIX which is one step colder than stock (or two steps if you believe Hugh) and never had any issues. I'm just stage 2 currently.

[Charles.waite]

Sorry but, heat range 7 for NGK would be one step colder for the 1.8T/2.7T, which is a lower compression engine. FSI engines are higher compression, and higher compression creates more heat so you need a colder spark plug to dissipate that heat.

http://www.ngksparkplugs.com/part_fi...uv/default.asp

Go through the steps to choose a B7 A4 2.0T and you will see that the only plug is a heat range 7.

This.

Sorry Hugh, NGK 7 is stock for the b7. NGK 6 is stock for the older port injected engines.

[Jake@JHM]

"Heat range" is one of the main factors governing spark plug performance under various conditions. The term "heat range" simply refers to the classification of spark plugs according to their ability to transfer heat from the firing end of the spark plug to the cooling system of the engine.

A plug that transfers heat away from the firing end slowly, so that the temperature of the firing end remains relatively hot, is called a "hot plug." (A "hot plug" does not produce a "hotter" spark.)

A plug that transfers heat away from the firing end rapidly, so that the firing end stays relatively cool, (compared to a "hot plug") , is called a "cold plug."

Usually there are several different heat ranges of spark plugs for any particular engine. What you want is a plug that is neither too "hot" nor too "cold" for the conditions affecting the engine. (A plug "just right" under one set of conditions may be too "cold," or too "hot ," under other conditions. )

If the plug is too "cold," deposits build up on the insulator nose. These deposits bleed away voltage and can cause a plug to misfire. In severe cases, the plug may not fire at all.

If, however, a plug is too "hot" for the existing conditions, you may encounter preignition. This means that the glowing tip of the insulator ignites the fuel charge before the plug actually sparks. This wastes power, and, in most cases, will cause severe engine damage.

The general rule on selecting heat range is this: the lower the combustion chamber temperatures, the "hotter" the plug should be. As conditions cause combustion chamber temperatures to rise, a "colder" plug is needed.

There are at least nine factors that have some effect on those temperatures:

COMPRESSION RATIO. The higher the compression ratio, the higher the combustion chamber temperature - and the "colder" the plug should be.

Reference:

http://www.spridgetguru.com/TA0061.html

The 2.0T has a 10.5:1 ratio whereas the 1.8T has a 9.3:1 ratio.

Which engine do you think needs the colder plugs?

We are not new to this.

[ericpaulyoung]

I believe the NGK now recommends the PFR7S8EG on their finder as the "revised" recommendation to the OEM heat range, and I "think" it is one step colder than the original OEM BOSCH plugs.

epy

EDIT - in other words, the original OEM plugs were found to be too hot for the increased compression on the FI engine, so they revised the recommended replacement. So the actual OEM heat range would be a 6, but it is the wrong heat range, so the "real, correct" OEM heat range would have been one step colder (a 7 in NGK terms).

[Jake@JHM]

Bosch heat range is 6, but their scale goes backwards as opposed to NGK meaning 5 would be a colder plug. Every plug manufacturer as their own way of designating the heat range.

BOS 6 = NGK 7

BOS 5 = NGK 8

etc..

[ericpaulyoung]

Bosch heat range is 6, but their scale goes backwards as opposed to NGK meaning 5 would be a colder plug. Every plug manufacturer as their own way of designating the heat range.

Yup. I like bosch better, as going down for colder makes more sense to me. The stock bosch is a 5, which is a 6 in NGK, but the plug that matches the OEM configuration on the FSI is a 4 bosch or a 7 NGK. That is how I understand the story at least. So NGK now shows the replacement plug as a 7. So I guess everybody is right, in that the OEM plug is a 6 but should have been a 7. Maybe I am just confusing the situation.

epy

[Jake@JHM]

Yup. I like bosch better, as going down for colder makes more sense to me. The stock bosch is a 5, which is a 6 in NGK, but the plug that matches the OEM configuration on the FSI is a 4 bosch or a 7 NGK. That is how I understand the story at least. So NGK now shows the replacement plug as a 7. So I guess everybody is right, in that the OEM plug is a 6 but should have been a 7. Maybe I am just confusing the situation.

epy

A 4 Bosch plug would be two steps colder

[ericpaulyoung]

Read this.


http://changegears.wordpress.com/tag/101905631b/


Here is a quote from the write up:

"There is a new part number for the OEM spark plugs - 06H 905 601 A. They are made by NGK now instead of Bosch. The corresponding NGK part number is NGK PFR7S8EG. This new plug is a double platinum laser plug that is also one step colder. I guess all those people advocating one step cooler plugs were correct. "


Jake, you are correct, I had my numbers mixed up. The original OEM plug was a bosch 6, not a 5.

"This plug supercedes part number 101 905 631 H which superceded 101 905 631 B. The previous part was a Bosch FR6KPP332S."

[Jake@JHM]

A Bosch heat range 6 is equivalent to a NGK heat range 7. Therefor it is the same heat range. They are going by the number and not how each company designates the heat ranges.

[Charles.waite]

My Bentley, Which was published in 2010 says bosh plug FR6KPP332S is the OEM plug for the 2.0t. So I'm pretty sure all this confusion came from that stupid spark plug thread.

That and I think people were so conditioned to using the 1.8t and 2.7t heat ranges nobody thought to do anything different.

For what it's worth, I ran 6 range NGK plugs for almost a year in my b7 without issue. Not saying it's a good thing especially on a modified engine (I am stock still).

[ericpaulyoung]

A Bosch heat range 6 is equivalent to a NGK heat range 7. Therefor it is the same heat range. They are going by the number and not how each company designates the heat ranges.

Order from coldest to hottest:

Bosch 1 2 3 4 5 6 7 8 9 10
NGK 10 9 8 7 6 5 4 3 2 1

Close, they are not one for one, and they cross over at 6. So a bosch 6 is also an NGK 6. Here is the cross-reference chart. Note that the OEM plug was a FR6 rating, which if you look up at the cross-reference are all BRK6. Except for the 2095, which is a special plug.

[ericpaulyoung]

My Bentley, Which was published in 2010 says bosh plug FR6KPP332S is the OEM plug for the 2.0t. So I'm pretty sure all this confusion came from that stupid spark plug thread.

No, look at the NGK published cross-reference table. The FR6 is a BKR6.

epy

EDIT - I think the confusion comes from the fact that the two different manufacturers designs cross-over right at "around" 6, and the OEM plug was also changed between 2005 and 2008.

[Charles.waite]

But they don't list our specific plug Eric so that chart is useless. And since one of the fr6 plugs lists a bkr7 you can't draw any solid conclusions.

Bosh heat range 6 is OEM. That much we know.

Edit: is there any info that correlates a heat range number with actual temperatures or combustion parameters? Then we could actually determine this using non-arbitrary numbers.

[ericpaulyoung]

But they don't list our specific plug Eric so that chart is useless.

Not exactly. I don't have the complete cross-reference pdf, but I will look for it. The point is that the cross-over is approximately around 6, so there is some confusion because of that. Also, the recommended OEM plug changed mid model, so there is some from that also.

Basically we are arguing about the wrong thing. It doesn't matter what was the OEM plug. What matters is what should the OEM plug be, and what should a plug in a setup with increased boost be. That is what is important to us. I don't think we care as much about the history of how we got here, but are really interested in what is correct for our setups.

epy

[Charles.waite]

Not exactly. I don't have the complete cross-reference pdf, but I will look for it. The point is that the cross-over is approximately around 6, so there is some confusion because of that. Also, the recommended OEM plug changed mid model, so there is some from that also.

Basically we are arguing about the wrong thing. It doesn't matter what was the OEM plug. What matters is what should the OEM plug be, and what should a plug in a setup with increased boost be. That is what is important to us. I don't think we care as much about the history of how we got here, but are really interested in what is correct for our setups.

epy

Agreed. And see my edit above.

[Jake@JHM]

It is a fine line, yes.

And there is a BOS 6 equaling a NGK7 on that list too. I would give you the row number, but there is none. The plugs are "fr6ddc to bkr7ekc"

EDIT

Damm i was late to the party on this one.


Moral of this story: DO NOT GO NGK HEAT RANGE 6!

[ericpaulyoung]

It is a fine line, yes.

And there is a BOS 6 equaling a NGK7 on that list too. I would give you the row number, but there is none. The plugs are "fr6ddc to bkr7ekc"

EDIT

Damm i was late to the party on this on.

Ya, that is the fukker right there. The two heat ranges don't cross over at exactly one integer for all the designs. As Charles pointed out, the cross-reference for our specific design will be a little different again. They inflect at around that spot for all their designs but are only approximately around 6, and it may be 5.76768 or 6.10139 for one depth plug but 5.9999 or 6.23558 for another. :)

epy

[Jake@JHM]

Hahaha now everyone is going to be confused!

Hi, I would like to order a spark plug heat range 2895274089572056. Thanks.


Anyways,

The BOS FR5DTC is a fantastic plug for higher boosting 2.0Ts