Reliable ignition coils for the S63TU motor?

[TheHouseWon]

Originally Posted by m5james

2 steps colder plugs in the mail directly from BMS, cost $127 shipped...I couldn't find them cheaper.

HCP/Halim stage 2 tune only, no issues.
HCP with JB4 map 1, no issues.
HCP with JB4 map 2, initially was great, adjusted FF from 0 to 30, which has then self adjusted itself up to 100 and misfires coupled with CEL and Reduced Power start happening.
HCP with JB4 map 3, ditto of map 2 but it happens faster.
HCP with JB4 map 6, custom adjusted to 21psi...total monster so long as I feather the throttle enough to keep the misfires from happening.

I still haven't seen a link for ignition coils themselves short of going to the stealership. I have seen a link for the S63TU that's coils and plugs but I don't recall any reviews.

Are they Bosch or ngk? I have 8 additional Ngk plugs, two steps colder, laying around. Let me know if you want them

[m5james]

Well now you mention that lol. I already ordered a set from BMS, they're NGK. What are the BMW ones?

[TheHouseWon]

Originally Posted by m5james

Well now you mention that lol. I already ordered a set from BMS, they're NGK. What are the BMW ones?

I think they are Bosch on S63 motors. But NGK is used on other BMW motors and they are available in 2 step colder. They are iridium and platinum like the OEM ones.

[2016-M5]

Is there a one step colder plug, whats the code for it?

[m5james]

Read the thread...

[Rated M Roadster]

Was looking for new plugs and came across this thread.

Originally Posted by TheHouseWon

12120039634 = Stock

12120039664 = Ngk 97506 2 steps colder

Originally Posted by TheHouseWon

12120035531 = ngk 5992 1 step colder.

You'll want to verify before buying, but I'm sure these will work

Where are you finding this info? This is wrong. 97506 are stock S63tu plugs, not 2 steps colder. See attachments:

[TheHouseWon]

Hmm. I was told by several shops that 97506 were colder.

[Rated M Roadster]

Originally Posted by 13M5F10

I was running N55 plugs which are colder than the S63TU plugs gapped to to .018.

OEM N55 plugs are equivalent to NGK 5992, which is 1 step hotter than stock S63tu plugs. OEM S63tu are 1 step colder than OEM N55 and OEM N55 plugs are 1 step colder than OEM N54 plugs.

This thread is a mess.

EDIT, adding quote (N20 plugs = S63tu):

Originally Posted by Unklejoe

Okay, I found some new info.

There are actually 5 plugs listed for the N20.

NGK SILZKBR8B8S (BMW# 12120038704)
NGK SILZKBR8C8S (BMW# 12120038896)
NGK SILZKBR8D8S (BMW# 12120039664)
NGK SILZKBR8E8S (BMW# 12120040573)
NGK SILZKBR9F8S (BMW# 12120042724)


Info:

NGK SILZKBR8B8S

This was the first N20 plug. It has been discontinued. One heat ranger colder than stock N55. Two colder than stock N54. It was replaced as per this TSB:

"As of March 2012 vehicle production, a new spark plug is being introduced in all models with the N20 engine. Its designation is NGK SILZKBR8C8S, BMW P/N 12 12 0 038 896. The new spark plug doubles the original replacement interval to 60,000 miles or every 4th engine oil service, instead of 30,000 miles/every 2nd engine oil service. The previous spark plug had the designation NGK SILZKBR8B8S. It has been discontinued."


NGK SILZKBR8C8S

Second N20 plug. One heat ranger colder than stock N55. Two colder than stock N54. This plug is what PTF recommends, but it has been discontinued. RealOEM lists the NGK SILZKBR8D8S as the replacement.


NGK SILZKBR8D8S

Current listed plug for the N20. One heat ranger colder than stock N55. Two colder than stock N54. This replaced the NGK SILZKBR8C8S listed above.


NGK SILZKBR8E8S

Current listed plug for N20's produced up to early 2015. One heat ranger colder than stock N55. Two colder than stock N54. Even though the revision is "E", it would appear that the "D" plug listed above is currently the latest recommended plug for the N20 as of today. The brand new N20 LCI motors call for the "D" plug. Maybe BMW made another revision after the "D" plug but then changed their mind and stuck with the "D" plug? IDK


NGK SILZKBR9F8S

This plug is interesting. First of all, I'm not positive that this is the correct NGK plug number. I found this info on a website that wasn't very clear. However, this plug is listed for all N20's that are "flex fuel" compatible...AKA E85. If this NGK number is correct, it would indicate that this plug is TWO steps colder than the stock N55 plug and THREE steps colder than the stock N54 plug. Maybe there's a reason for the colder plugs on motors designed to use E85?


CONCLUSION

The latest NORMAL N20 plug is the NGK SILZKBR8D8S (BMW# 12120039664). It's one step colder than the stock N55 plug and two steps colder than the stock N54 plug.

However, there's a potential new plug that was designed for flex fuel N20 motors called the NGK SILZKBR9F8S (BMW# 12120042724). This plug is two steps colder than the N55 plugs (if the NGK number is correct). I would have originally said that two steps colder is too much, but BMW seems to think that the colder plug was necessary for E85 cars, so maybe it could be advantageous to N55s as well. Someone should buy one of these so we can figure out the actual NGK number. Not it. This plug seems VERY hard to find.

[allmotor_2000]

Most of the misfires come from tuning and the targeted AFR ratios. Cold plugs are certainly better but gapped stock plugs should work fine while the tune is sorted out.

[TheHouseWon]

Good research

[m5james]

Rated M Roadster posted a screenshot from Terry about the N20 & S63TU engines. I've got the S63 non-TU, so I need to hop onto www.realoem.com and compare. I already had new plugs as is before I started getting higher boost misfires, so if the 97506 isn't colder than what comes stock in my truck, I can only assume it's the tighter gaps that's helped but ultimately I want to go colder as well per NGK's article about why to go colder when adding HP.

I found this while searching Google for this thread:

https://www.n54tuning.com/ngk-97506-...park-plug.html

[Londonboy]

Great info guys

Thanks

[scipy]

Sorry to bring this thread back from the dead, but I'm rather confused about the heat range of NGK spark plugs. NGK heat range 8 is stock for the F10 M5 and it's listed on their site for the 97506 SILZKBR8D8S spark plug. So, if one is looking for a 1 step "colder" spark plug, the heat range needed is a 9 according to NGK range - but every spark plug mentioned in this thread is either an 8 or a 7. I understand you all reference hotter/colder for N20/N54/N55 motors, but since we're on the F10 M5 forum with the S63 motor - if heat range 8 is stock, which spark plug from NGK is a heat range 9 (1 step colder)?

Even Turner doesn't seem to understand this: https://www.turnermotorsport.com/p-5...plug-set-of-8/ they list this as 1 step colder but those are just 97506 SILZKBR8D8S Heat range 8 spark plugs that are stock/OEM heat range for the F10 M5.

[kjdeion21]

Hey guys, I know that it says to always run colder when you are adding HP, I have a 2013 BMW F10 M5 and I have approximately 62k miles and I would like to change my plugs and coils before installing the JB4 tune. I currently have catless downpipes and cold air intake and there has been a substantial gain already. When you buy the NGK Iridium they are saying they already come gapped, what would be the gap that I should run them at and/or should I change them?

[drifter17a]

Originally Posted by TheHouseWon

12120035531 = ngk 5992 1 step colder.

You'll want to verify before buying, but I'm sure these will work

@TheHouseWon How do you know what the stock heat levels are for
How can one findout what model is the stock plugs

[Rated M Roadster]

Originally Posted by drifter17a

@TheHouseWon How do you know what the stock heat levels are for
How can one findout what model is the stock plugs

Give the whole thread a quick read.

[drifter17a]

thanks did earlier after I posted

SO I guess no one knows what is stock heat level . I know NGK has heat range think between 1-10 ? but unsure if other brands do