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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 05-09-2005, 12:39 PM
Ron Stygar's Avatar
Ron Stygar Ron Stygar is offline
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Spark Plug Chart

http://www.unofficialbmw.com/images/SparkPlugChart.pdf

e90 and e60 (with N52 engine) are now using iridium spark plugs

"High Performance Iridium Spark Plugs, also referred to as High Power
Iridium Spark Plugs, are incorporated on 2006 model year and later E90, E60
vehicles with the new N52 engine. High Performance Iridium Spark Plugs
incorporate an iridium center electrode (0.6 mm thick), one ground
electrode, and a redesigned insulator. The new spark plug technology allows
for increased service life, improved cold start performance/combustion
characteristics, and a consistent operation throughout the entire service
life. The service life of the new High Performance Iridium Spark Plug is
100,000 miles."

http://www.ngk.de/NGK_CREATES_NEW_IR...RK.2710.0.html
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  #2  
Old 05-09-2005, 02:39 PM
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Kaz Kaz is offline
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Hmm... Interesting.
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  #3  
Old 05-10-2005, 09:21 AM
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QikSilver QikSilver is offline
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Yeah, that's the one I put in mine when I did my valves, the NGK iridium.
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01 M roadster, F: GC/Koni short coilover struts, Eibach, Wilwood front brakes, GC tubular swaybar. R: TC Kline springs, short Bilsteins, IE sub & swingarm bushings & shock mounts, 3.23 gear, Rogue dual-ear cover, Eisenmann 4x83 pipes. MISC: Sport mode, Rogue pulleys, keyless, RG Motorsport intake, OZ Superleggera 18" 3 piece.
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  #4  
Old 05-10-2005, 09:57 AM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by QikSilver
Yeah, that's the one I put in mine when I did my valves, the NGK iridium.
Which part number did you purchase?
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  #5  
Old 05-10-2005, 01:59 PM
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QikSilver QikSilver is offline
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Quote:
Originally Posted by Ron Stygar
Which part number did you purchase?

I'll post it when I get home.
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01 M roadster, F: GC/Koni short coilover struts, Eibach, Wilwood front brakes, GC tubular swaybar. R: TC Kline springs, short Bilsteins, IE sub & swingarm bushings & shock mounts, 3.23 gear, Rogue dual-ear cover, Eisenmann 4x83 pipes. MISC: Sport mode, Rogue pulleys, keyless, RG Motorsport intake, OZ Superleggera 18" 3 piece.
06 Hemi Durango
04 G35 Coupe
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07 Scion tC
89 Reynard F2000
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  #6  
Old 05-10-2005, 03:34 PM
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QikSilver QikSilver is offline
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NGK Iridium IX, here's the part #: DCPR7EIX

I got them from sparkplugs.com
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John

01 M roadster, F: GC/Koni short coilover struts, Eibach, Wilwood front brakes, GC tubular swaybar. R: TC Kline springs, short Bilsteins, IE sub & swingarm bushings & shock mounts, 3.23 gear, Rogue dual-ear cover, Eisenmann 4x83 pipes. MISC: Sport mode, Rogue pulleys, keyless, RG Motorsport intake, OZ Superleggera 18" 3 piece.
06 Hemi Durango
04 G35 Coupe
05 Scion xB
07 Scion tC
89 Reynard F2000
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  #7  
Old 05-10-2005, 04:11 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by QikSilver
NGK Iridium IX, here's the part #: DCPR7EIX

I got them from sparkplugs.com
The person that sent me the info came up with DCPR8EIX NGK Iridium IX (NGK 6546) for a E46-M3. He said it was an alternative to the stock DCPR8EKP (NGK 7415).
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  #8  
Old 05-10-2005, 05:05 PM
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QikSilver QikSilver is offline
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NGK's own web site lists the 7 for the S54. That 8 seems cold to me considering that 6 is probably the middle of the heat range. I don't know, I'd have to try them, the 7's sure work good, though.
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John

01 M roadster, F: GC/Koni short coilover struts, Eibach, Wilwood front brakes, GC tubular swaybar. R: TC Kline springs, short Bilsteins, IE sub & swingarm bushings & shock mounts, 3.23 gear, Rogue dual-ear cover, Eisenmann 4x83 pipes. MISC: Sport mode, Rogue pulleys, keyless, RG Motorsport intake, OZ Superleggera 18" 3 piece.
06 Hemi Durango
04 G35 Coupe
05 Scion xB
07 Scion tC
89 Reynard F2000
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  #9  
Old 05-10-2005, 06:31 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by QikSilver
NGK's own web site lists the 7 for the S54. That 8 seems cold to me considering that 6 is probably the middle of the heat range. I don't know, I'd have to try them, the 7's sure work good, though.
I don't know either, but will try to find out.
BMW recommends the same plug (DCPR8EKP) for all S54's.
I would think that since the stock one is an 8 the iridium one would be too.
If you search on the NGK site for a 2001 M-Z3 and 2001>2003 E46-M3 it comes up with
DCPR7EIX. If you search for a 2004 E46-M3 it comes up with DCPR8EIX.
Note the difference in gaps in the following pic. Not sure how you measure the gap on these new style plugs. When checking a new stock plug, I come up with .038".

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  #10  
Old 05-10-2005, 08:07 PM
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QikSilver QikSilver is offline
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I'm almost more concerned about about the gap change, then one number on the heat range. I may get a set of 8's to see what they look like.

If you come up with anything, let me know.
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01 M roadster, F: GC/Koni short coilover struts, Eibach, Wilwood front brakes, GC tubular swaybar. R: TC Kline springs, short Bilsteins, IE sub & swingarm bushings & shock mounts, 3.23 gear, Rogue dual-ear cover, Eisenmann 4x83 pipes. MISC: Sport mode, Rogue pulleys, keyless, RG Motorsport intake, OZ Superleggera 18" 3 piece.
06 Hemi Durango
04 G35 Coupe
05 Scion xB
07 Scion tC
89 Reynard F2000
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  #11  
Old 05-10-2005, 08:39 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by QikSilver
If you come up with anything, let me know.
Will do.
Just sent an email to NGK tech support and will call their tech support
(877-473-6767, promt #2) tomorrow.
As you know, I will be doing my valve check/adjust soon and want to try the iridiums.
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  #12  
Old 05-10-2005, 10:23 PM
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fpa1974 fpa1974 is offline
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Mein Auto: 02 M Cpe,03 325iT,05 330i
I checked my manual which says: NGK DCPR8EKP

So NGK site is not correct. Anyway I am really interested in this since I was looking in changing plugs soon too.

Thanks,
Florian
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  #13  
Old 05-11-2005, 07:40 AM
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MGRMLN MGRMLN is offline
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Did this swap and I've loved it

Great for S52's as well.
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  #14  
Old 05-11-2005, 09:31 AM
JBgotM JBgotM is offline
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Quote:
Originally Posted by fpa1974
I checked my manual which says: NGK DCPR8EKP

So NGK site is not correct. Anyway I am really interested in this since I was looking in changing plugs soon too.

Thanks,
Florian
I used NGK's website for reference when I ordered plugs and they were not the right ones.

Personally, I prefer standard plugs over platinum/iridium plugs. The only reason I have iridium plugs in the car is that they were free and I love that price.
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  #15  
Old 05-11-2005, 12:45 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by QikSilver
If you come up with anything, let me know.
NGK NA tech support only knows what was sent to them.
If you go to NGK's Germany site it doesn't even show the S54 for our cars. It shows the S50 engine which uses the PKR7A.
Just ordered six DCPR8EIX and one DCPR7EIX for comparison from sparkplugs.com. $6.95 each plus $16.15 2nd day air shipping. I should have them Friday.
Will post some pics when they show up.
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  #16  
Old 05-11-2005, 03:00 PM
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ARC///M ARC///M is offline
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Hot Plugs

I BOUGHT A SET LAST SUMMER,And they were eights,Vins been running this set up with plasma coils and swears buy it,He just flew through emissions and ran home to installed his plasma coils.right after.
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  #17  
Old 05-11-2005, 07:53 PM
vromano vromano is offline
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I have been running Denso Iridium plugs and Plasma solutions ignition coils for the past Year. Been very impressed with this combo and application with forced induction . Coils supposed to amplify secondary spark output and help for more complete combustion. There was a problem with early version of the coils giving fault codes for ignition misfire . This was apparently related to the ECU seeing higher voltage than what it is used to. There was no check engine light but codes were stored in the memory , therefore not emission compliant by todays Connecticut standards.I called the company and they have subsequently upgraded the coils to correct this problem.They shipped me new coils after I shipped back old ones .I put back stock coils to pass emissions and have put in new coils-so far no fault codes. Confident new coils are now emission compliant. End result--more torque/quicker accelleration/pulls harder to redline. Would Encourage others to consider tis option. Coils are pricy/ iridium plugs not cheep either. But everything comes at a price/ nothing is for free!! I vote thumbs up for iridium plugs /consider coils as well especially if running higher Boost
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  #18  
Old 05-11-2005, 10:12 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by Ron Stygar
NGK NA tech support only knows what was sent to them.
If you go to NGK's Germany site it doesn't even show the S54 for our cars. It shows the S50 engine which uses the PKR7A.
Just ordered six DCPR8EIX and one DCPR7EIX for comparison from sparkplugs.com. $6.95 each plus $16.15 2nd day air shipping. I should have them Friday.
Will post some pics when they show up.
Just checked the EPC for the S50 stock plug and it is the NGK PKR7A.
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  #19  
Old 05-13-2005, 06:41 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by Ron Stygar
Just ordered six DCPR8EIX and one DCPR7EIX for comparison from sparkplugs.com. $6.95 each plus $16.15 2nd day air shipping. I should have them Friday.
Will post some pics when they show up.
The 7EIX and 8EIX have the same .028" gap.

I have a new set of stock plugs for sale if anyone is interested.
12 12 0 022 902 $25.25 suggested retail each.
6 each ($83.00) plus $4.30 priority mail shipping with tracking USA.

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  #20  
Old 05-13-2005, 07:33 PM
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QikSilver QikSilver is offline
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Quote:
Originally Posted by Ron Stygar
The 7EIX and 8EIX have the same .028" gap.


I feel better now, knowing the gap is the same on the 7 and 8. The electrodes and ceramic look the same, too.
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01 M roadster, F: GC/Koni short coilover struts, Eibach, Wilwood front brakes, GC tubular swaybar. R: TC Kline springs, short Bilsteins, IE sub & swingarm bushings & shock mounts, 3.23 gear, Rogue dual-ear cover, Eisenmann 4x83 pipes. MISC: Sport mode, Rogue pulleys, keyless, RG Motorsport intake, OZ Superleggera 18" 3 piece.
06 Hemi Durango
04 G35 Coupe
05 Scion xB
07 Scion tC
89 Reynard F2000
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  #21  
Old 05-13-2005, 08:39 PM
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Randy Forbes Randy Forbes is offline
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Quote:
Originally Posted by QikSilver
I feel better now, knowing the gap is the same on the 7 and 8. The electrodes and ceramic look the same, too.
Based on conventional sparkplug wisdom, I was thinking the same thing; must be a pretty subtle heat range difference.
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  #22  
Old 05-13-2005, 10:09 PM
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When changing sparkplugs do you guys use copper anti-seize and dielectric grease?
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  #23  
Old 05-13-2005, 10:35 PM
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Quote:
Originally Posted by F1Crazy
When changing sparkplugs do you guys use copper anti-seize and dielectric grease?
BMW recommends "ungreased".
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  #24  
Old 05-14-2005, 05:58 AM
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Randy Forbes Randy Forbes is offline
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Quote:
Originally Posted by F1Crazy
When changing sparkplugs do you guys use copper anti-seize and dielectric grease?
I know that BMW says dry but I can't bring myself to thread anything steel into anything aluminum without a little Kopr-Shield (by Thomas & Betts) on the threads. Trick is to apply it sparingly; if it collects on the top threads, you're using too much.

I use Kopr-Shield on practically everything. I seldom use dielectric grease (old British side exit distributor caps being the exception).
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  #25  
Old 05-14-2005, 09:53 AM
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QikSilver QikSilver is offline
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I put a little anti-sieze on mine even though BMW says otherwise. Aluminum is very delicate, plus the anti-sieze acts somewhat like grease, allowing me to distinctly feel when the sparkplug's metal gasket has touched and to feel it compressing and, most important, when it has bottomed. Any tightening beyond that is dangerous and unnecessary.
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01 M roadster, F: GC/Koni short coilover struts, Eibach, Wilwood front brakes, GC tubular swaybar. R: TC Kline springs, short Bilsteins, IE sub & swingarm bushings & shock mounts, 3.23 gear, Rogue dual-ear cover, Eisenmann 4x83 pipes. MISC: Sport mode, Rogue pulleys, keyless, RG Motorsport intake, OZ Superleggera 18" 3 piece.
06 Hemi Durango
04 G35 Coupe
05 Scion xB
07 Scion tC
89 Reynard F2000
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