Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E53) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #11  
Old 08-01-2014, 11:17 AM
jgold47's Avatar
Member
 
Join Date: Oct 2012
Location: Michigan
Posts: 665
jgold47 is on a distinguished road
They fixed it...booo

FYI -

I ran the NGK iridiums.

7-8K miles

Got antsy and swapped back in new 4 prongs.

Made it about 500 miles before I put the iridiums back in.
__________________
For Sale Thread:
http://www.xoutpost.com/classifieds/...ia-bridge.html

2004 X5 3.0i - Sold
1998 328i Convertible (e36) -sold
2004 325xi (e46)- sold

Any questions?: DICE mediabridge|gauge rings|LED Angel Eyes|front door carrier|GT1/DIS/INPA/NCS|bluetooth retrofit|SIRIUS Retrofit|fuel filter|Dorman DISA|Roof Rack Delete|Sunroof drains|AC drains|rear sway bar swap|o2 sensors|VCG|Osram Night Breakers
Reply With Quote

Sponsored Links

  #12  
Old 08-01-2014, 11:29 AM
Member
 
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,609
cn90 is on a distinguished road
Once you put the NGK Iridium in, you don't ever want to go back to the Bosch 4-prong thingy...
__________________
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
Reply With Quote
  #13  
Old 08-01-2014, 12:14 PM
TiAgX5's Avatar
Member
 
Join Date: Oct 2010
Location: Coppell,TX
Posts: 3,489
TiAgX5 is on a distinguished road
Why not use a multi-electrode plug?

Multi-electrode plugs reduce the percentage of misfires by using surface gap technology (longer spark path) & multi spark paths. Due to less then perfect fuel/air mixtures (lean/rich areas in the combustion chamber) a single gap plug allows for more power strokes without ignition. From what I've read, single electrode plug fired gasoline engines have unignited power strokes of 4% to 5%, 4 electrode plugs reduce that to around 1%. They also require less voltage to fire due to surface gaps (the spark jumps across the insulator surface where there is lower resistance.

An additional downside to single electrode plugs (when in central position of the combustion chamber, BMW motors) is the fact that the protuding electrode blocks the flame kernel path to the center of the piston, reducing power/fuel economy.

With plugs positioned to the side of piston center, a common practice is to index the plug, to face the flame kernel path at the center of the piston face. HP/TQ gains of 2% to 3% on dyno tests after spark plug indexing are common.

QUOTE>>>>"Spark plug manufacturers have succeeded in extending the life of spark plugs and fouling resistance by going to high-temperature electrodes made out of platinum, iridium and other exotic metals. Platinum is one of the best conductors of heat and electricity. It also resists chemical corrosion and electrical erosion much better than ordinary steel alloys, making it an ideal material for the electrodes in long-life spark plugs. Iridium is even better. Iridium is six times harder and eight times stronger than platinum. This allows the use of a smaller center electrode, which reduces the voltage required to fire the plug by as much as 5,000 volts compared to a standard spark plug.
Spark plug manufacturers also use a variety of different electrode configurations to reduce misfires by exposing more of the spark and flame kernel to the fuel mixture inside the combustion chamber. Extended electrodes, surface gap electrodes, multiple electrodes and specially-shaped outer electrodes are all different techniques that are used to improve ignition performance and reliability."

AND

"One way to reduce misfires under load and improve ignition reliability is to expose more of the spark to the air/fuel mixture. Standard electrodes tend to shield the spark somewhat and can actually quench the initial flame kernel under some operating conditions. To open up the spark, some spark plug manufacturers split the tip of their outer electrodes."

Here.....

Questioning Misfires | Tomorrows Technician

Bosch Platinium Iridium Fusion 4 electrode plugs are about $5 each. Just installed a set a few weeks ago........

BoschLive - Archive
__________________
'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!

Last edited by TiAgX5; 08-01-2014 at 12:19 PM.
Reply With Quote
  #14  
Old 08-01-2014, 12:58 PM
Member
 
Join Date: Jun 2014
Location: Omaha, NE
Posts: 1,609
cn90 is on a distinguished road
Once you use NGK Iridium plug, you don't look back at the Bosch 4-prong thingy.
Never.
__________________
1998 E39 528i 5sp MT
2006 E53 X5 3.0 6sp MT
Reply With Quote
  #15  
Old 08-01-2014, 01:12 PM
TiAgX5's Avatar
Member
 
Join Date: Oct 2010
Location: Coppell,TX
Posts: 3,489
TiAgX5 is on a distinguished road
Quote:
Originally Posted by cn90 View Post
Once you use NGK Iridium plug, you don't look back at the Bosch 4-prong thingy.
Never.
Again, why?
__________________
'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!
Reply With Quote
  #16  
Old 08-01-2014, 02:41 PM
rayxi's Avatar
Custom User Title
 
Join Date: Apr 2005
Location: Calgary, Canada
Posts: 4,173
rayxi is on a distinguished road
I'd be wary of any anecdotal evidence that one plug is better than another. Most people change their plugs because the old ones need changing. Of course the engine will run better. The engine would run better with new plugs of the same type as the old ones.

TiAgX5 quoted differences in the <2% range. I doubt that anyone would be able to feel the difference or notice a change in fuel consumption in normal driving.
__________________
Wake up every day that would be a start.
Reply With Quote
  #17  
Old 08-01-2014, 09:24 PM
admranger's Avatar
Member
 
Join Date: Mar 2009
Location: Las Vegas
Posts: 1,636
admranger is on a distinguished road
I used Iridium's when I raced, and yes, I indexed them. Good plugs.

I forgot to look for them when I put new plugs in the X5. I put in the bmw quad electrode ones replacing single electrode plugs and my mileage has dropped by 1 mpg or so (small sample statistics, I know)...
__________________
Kirk
Las Vegas
2016 X5 40e Mineral White/Black Dakota Leather, ZLL, ZCW, ZDA, ZDB, ZPP, multi contour seats, rear side window shades, HK stereo
2011 E90M3, 6-speed manual
Reply With Quote
  #18  
Old 08-02-2014, 01:12 AM
four.8is's Avatar
Member
 
Join Date: Feb 2014
Location: Seattle
Posts: 943
four.8is is on a distinguished road
Multi-Electrode Spark Plugs: A Leap of Faith? | FCP Euro
__________________
2006 X5 4.8is LeMans Blue / creambeige interior
Prod.date: 2006-06-21
Reply With Quote
  #19  
Old 08-02-2014, 06:49 AM
Member
 
Join Date: Apr 2011
Location: NEW YORK
Posts: 793
electricalserv x5 is on a distinguished road
I installed the OEM and they cost $22 apiece , end no magic.
__________________
2006 4.8IS
65K MILES
PURCHASED 7/13
Reply With Quote
  #20  
Old 08-02-2014, 11:12 AM
TiAgX5's Avatar
Member
 
Join Date: Oct 2010
Location: Coppell,TX
Posts: 3,489
TiAgX5 is on a distinguished road
Quote:
Originally Posted by four.8is View Post
Read the "comments" on this link.
__________________
'03 X5 4.4 Sport, last of the M62s (8-03 build date)
I believe in deadication to craftmanship in a world of mediocrity!
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 09:38 PM.
vBulletin, Copyright 2024, Jelsoft Enterprises Ltd. Search Engine Friendly URLs by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.