BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Post Reply
 
Thread Tools Search this Thread
      10-19-2013, 03:50 PM   #1
LarThaL
Colonel
LarThaL's Avatar
64
Rep
2,631
Posts

 
Drives: 2011 M3
Join Date: Apr 2011
Location: West Springfield, MA

iTrader: (0)

Any better spark plugs than stock?

Just curious....is anything out there superior to stock for the S65?
__________________
Precision tool: 2011 BMW ///M3
Sledgehammer: 2014 Audi S6

Appreciate 0
      10-19-2013, 05:15 PM   #2
Longbow64
_______
Longbow64's Avatar
13
Rep
752
Posts

 
Drives: 09 E90 M3, 13 X3 35i MSport
Join Date: Apr 2008
Location: Orlando

iTrader: (4)

Not that I'm aware. They are a lot cheaper for the same NGK model on Amazon.
__________________

'09 E90 M3 | VF620 SC tuned and coded by BPM | KW V3 | ARC Wheels w/AD08 | OnEighty Lights | AA Signature Exhaust | BMW Performance and IND trim | Recaro Profi and child seats
'13 35i M-Sport X3 | JB4 Stage 1 | BMS Intake | H&R Springs | Gloss black grill | CF Wrap and Coded by me
Appreciate 0
      10-19-2013, 10:12 PM   #3
Ronnydashore
Banned
0
Rep
54
Posts

 
Drives: 2012 Silverstone M3 DCT
Join Date: Oct 2013
Location: Hollywood

iTrader: (0)

changing them often is the only thing worth doing. Even after 10k miles they start to cause timing to be pulled by messing with the ion sensing ability of the spark plug electrodes mimicking knock by giving a signal interference between dirty electrodes. So keep changing them every 10k and have performance like new and full timing advance
Appreciate 0
      10-19-2013, 10:55 PM   #4
dparm
Major
dparm's Avatar
United_States
14
Rep
1,447
Posts

 
Drives: 2011.5 E90 M3
Join Date: Jun 2013
Location: Chicago, IL

iTrader: (0)

Quote:
Originally Posted by LarThaL View Post
Just curious....is anything out there superior to stock for the S65?
Just stick with the stock plugs (Amazon has them for $11.43 -- or wait for a coupon at your local auto parts store). Plugs undergo an extensive amount of testing to find the proper one, so don't try and second-guess BMW on something like this. Unless the car is wildly tuned, the factory plug is sufficient, though the change interval is debatable -- no harm in changing them early, but it is probably wasted money to swap them every year.

If there were a Denso Iridium that fit, I would recommend that as you can get an ultra-sharp 0.4mm tip -- sharpest made.
__________________
2011.5 AW M3 sedan ZCP
Appreciate 0
      10-20-2013, 10:58 AM   #5
Ezio
Brigadier General
Ezio's Avatar
United_States
44
Rep
3,028
Posts

 
Drives: 2013 E92 M3
Join Date: Nov 2012
Location: MI

iTrader: (0)

Quote:
Originally Posted by Ronnydashore View Post
changing them often is the only thing worth doing. Even after 10k miles they start to cause timing to be pulled by messing with the ion sensing ability of the spark plug electrodes mimicking knock by giving a signal interference between dirty electrodes. So keep changing them every 10k and have performance like new and full timing advance
do you know when BMW recommends the change ?
__________________
Appreciate 0
      10-20-2013, 12:16 PM   #6
BMW Fanatic
Banned
Canada
61
Rep
3,314
Posts

 
Drives: slow
Join Date: Jul 2009
Location: Calgary

iTrader: (11)

Quote:
Originally Posted by Ezio View Post
do you know when BMW recommends the change ?
BMW recommends the change every 50,000KM so 30,000MI.

I will probably go with NGK Iridium this time around and do the change at 15,000KM instead of waiting for 50,000KM.
Appreciate 0
      10-20-2013, 12:41 PM   #7
thekurgan
Bad Lieutenant
thekurgan's Avatar
United_States
34
Rep
2,894
Posts

 
Drives: E90M3
Join Date: Aug 2007
Location: Sacramento

iTrader: (0)

Garage List
2008 BMW M3  [0.00]
Quote:
Originally Posted by BMW Fanatic View Post
BMW recommends the change every 50,000KM so 30,000MI.

I will probably go with NGK Iridium this time around and do the change at 15,000KM instead of waiting for 50,000KM.
No, you won't, they do not exist.
__________________

08 E90M3 6MT Alpinweiss/Carbon/BPMSport 91 octane tune/BPMSport Feature coding/BMW Pedals/Dinan Exhaust/Alcantara Wheel/Rear Fog Switch/Rattle fixes
Appreciate 0
      10-20-2013, 04:05 PM   #8
dparm
Major
dparm's Avatar
United_States
14
Rep
1,447
Posts

 
Drives: 2011.5 E90 M3
Join Date: Jun 2013
Location: Chicago, IL

iTrader: (0)

Quote:
Originally Posted by Ezio View Post
do you know when BMW recommends the change ?

I believe it is at 37k, then every 60k after that. I'd say that's probably a bit too long given that these are not a quad-electrode plug. I would recommend a 30k interval, unless the bulk of your driving is highway.
__________________
2011.5 AW M3 sedan ZCP
Appreciate 0
      10-20-2013, 06:55 PM   #9
BMW Fanatic
Banned
Canada
61
Rep
3,314
Posts

 
Drives: slow
Join Date: Jul 2009
Location: Calgary

iTrader: (11)

Quote:
Originally Posted by thekurgan View Post
No, you won't, they do not exist.
http://www.amazon.co.uk/Upgrade-Spar.../dp/B005ES2CJK

http://www.amazon.co.uk/Spark-Plugs-.../dp/B005EGIFNY
Appreciate 0
      10-20-2013, 08:00 PM   #10
dparm
Major
dparm's Avatar
United_States
14
Rep
1,447
Posts

 
Drives: 2011.5 E90 M3
Join Date: Jun 2013
Location: Chicago, IL

iTrader: (0)


Jesus Christ are those expensive. It's stupid to use iridium if you're not going to run a very long change interval, so I'd pass on them unless you plan to leave them in for 75k+.

Odd that those part numbers do not come up on the NGK website. The LKAR8AI-9 plug has a totally different design from stock and is only a single electrode.
__________________
2011.5 AW M3 sedan ZCP
Appreciate 0
      10-20-2013, 08:33 PM   #11
Ronnydashore
Banned
0
Rep
54
Posts

 
Drives: 2012 Silverstone M3 DCT
Join Date: Oct 2013
Location: Hollywood

iTrader: (0)

why iridium over the normal ones that stock uses if you change interval is 15k?

I have tried have verified that timing on this car is pulled after 15k or so with plugs. New plugs and immedatly car was able to hit timing targets. Have done this multiple times.

Plus if bmw recommends a change at 36 , than why would the next one be 60k? makes no sense. 36 still too long but 60 is just ridiculous.

There is no "need" to do it anymore often than every 50-75 as the car will run but its a matter of do you want your car running at peak power and efficiency. Some of us are anal. 15hp is a big deal to me to be wasted which is what you will likely give up if you wait until 50k miles. Some gas mileage as well.

To me its worth it to keep the car in absolutely peak shape
Appreciate 0
      10-20-2013, 09:35 PM   #12
dparm
Major
dparm's Avatar
United_States
14
Rep
1,447
Posts

 
Drives: 2011.5 E90 M3
Join Date: Jun 2013
Location: Chicago, IL

iTrader: (0)

Quote:
Originally Posted by Ronnydashore View Post
why iridium over the normal ones that stock uses if you change interval is 15k?

I have tried have verified that timing on this car is pulled after 15k or so with plugs. New plugs and immedatly car was able to hit timing targets. Have done this multiple times.

Plus if bmw recommends a change at 36 , than why would the next one be 60k? makes no sense. 36 still too long but 60 is just ridiculous.

There is no "need" to do it anymore often than every 50-75 as the car will run but its a matter of do you want your car running at peak power and efficiency. Some of us are anal. 15hp is a big deal to me to be wasted which is what you will likely give up if you wait until 50k miles. Some gas mileage as well.

To me its worth it to keep the car in absolutely peak shape


60k is not ridiculous. Compared to most other vehicles, it's actually rather short. Every other car I've had (two Audis, two Hondas, Mazdas, etc) came with factory multi-electrode platinums that were good to 100k. The newer cars are moving to iridium with change intervals of 150-200k.

Changing them early won't hurt anything, but why throw money down the drain. It's placebo effect.
__________________
2011.5 AW M3 sedan ZCP
Appreciate 0
      10-21-2013, 08:31 AM   #13
thekurgan
Bad Lieutenant
thekurgan's Avatar
United_States
34
Rep
2,894
Posts

 
Drives: E90M3
Join Date: Aug 2007
Location: Sacramento

iTrader: (0)

Garage List
2008 BMW M3  [0.00]
In the U.S., these are listed for motorcycles and marine vessels, so they don't pull up when using the part finder.

http://www.amazon.com/NGK-LKAR8AI-9-...ords=LKAR8AI-9


Aside from the pre-gap, they should work, although they look quite different from the photos.

Damn expensive too.
__________________

08 E90M3 6MT Alpinweiss/Carbon/BPMSport 91 octane tune/BPMSport Feature coding/BMW Pedals/Dinan Exhaust/Alcantara Wheel/Rear Fog Switch/Rattle fixes
Appreciate 0
      10-21-2013, 08:33 AM   #14
thekurgan
Bad Lieutenant
thekurgan's Avatar
United_States
34
Rep
2,894
Posts

 
Drives: E90M3
Join Date: Aug 2007
Location: Sacramento

iTrader: (0)

Garage List
2008 BMW M3  [0.00]
Quote:
Originally Posted by dparm View Post
60k is not ridiculous. Compared to most other vehicles, it's actually rather short. Every other car I've had (two Audis, two Hondas, Mazdas, etc) came with factory multi-electrode platinums that were good to 100k. The newer cars are moving to iridium with change intervals of 150-200k.

Changing them early won't hurt anything, but why throw money down the drain. It's placebo effect.
Plug resistance is utilized in the S65 as part of the knock control; other vehicles do not. This could be the reasoning behind the early change. 30k seems a lot to me, since I only put 5k/year on the car and I'd not want to leave plugs in the head 6 years. I just consider them maintenance every other year.
__________________

08 E90M3 6MT Alpinweiss/Carbon/BPMSport 91 octane tune/BPMSport Feature coding/BMW Pedals/Dinan Exhaust/Alcantara Wheel/Rear Fog Switch/Rattle fixes
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 11:12 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST