E90Post
 


GTB Performance
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > 2007 Engine Tech: How the N54 works (must read!!!)



Reply
 
Thread Tools Search this Thread
      09-29-2009, 04:10 AM   #67
creepy coupe
Major General
 
creepy coupe's Avatar
 
Drives: M235i
Join Date: Aug 2007
Location: UK

Posts: 8,173
iTrader: (2)

Garage List
2009 335i  [0.00]
I here my cars electric pump still running after switching off on a regular basis.even when I've just pulled in out of the garage.
creepy coupe is offline  
0
Reply With Quote
      04-06-2010, 01:48 PM   #68
barbagallo
Enlisted Member
 
Drives: 2009 Blue Water Metallic 335i
Join Date: Mar 2010
Location: Westchester / NYC

Posts: 45
iTrader: (1)

This thread almost convinces me that nothing has to be done to the car, performance mod wise. Truly a work of mechanical art.

...but sometimes people just want, want, want....!
barbagallo is offline  
0
Reply With Quote
      04-06-2010, 02:09 PM   #69
Renus
Lieutenant
 
Renus's Avatar
 
Drives: E92 335i
Join Date: Oct 2009
Location: Hong Kong

Posts: 524
iTrader: (1)

Just wanna inform post opener that, my 7 DKG 335i is running with MSD81 instead of 80 for engine management, anyway, very nice info. ^ ^
Renus is offline  
0
Reply With Quote
      07-26-2010, 03:59 PM   #70
DoPedUpM3
El Carpe Diem
 
DoPedUpM3's Avatar
 
Drives: Porsche Turbo/ 335i Coupe
Join Date: May 2010
Location: Southern Cali.

Posts: 219
iTrader: (4)

Garage List
2008 335i  [0.00]
Send a message via AIM to DoPedUpM3 Send a message via Yahoo to DoPedUpM3
Quote:
Originally Posted by Shawn_speed View Post
Personally and a number of forum members have experienced High Pressure fuel pump failures. There is a BMW SIB (SI B 12 55 06) that deals with symptoms and warranty work procedures. The Engine management PDF file has a great section and schematic of the pump as well as a great explanation of the role of the high pressure fuel system that makes the second generation DI system possible with precise fuel metering and up to 200 bar rail fuel pressure. It really helps to understand the role of the HPP and it's complexity that obviously caused the early pumps (N54's manufactured between 6/06 to 9/06) to be prone to failure.

Before my car's HPP was replaced, I experienced two episodes that were very different from each other. The first incident at 3500 miles was a case of RPM dropping briefly below 600 at idle and engine running very very rough. Since I was at a light when it happened, I pulled over, rebooted (stop engine, restart) and the problem went away.

The second incident happened around 3800 miles. I was coming up a long incline (6% grade over four miles) and the engine felt like a Honda's. It wasn't rough, just no turbo boost. Again a reboot made the problem go away.

Limp home mode is discussed on page 28 of engine management system which includes complete deactivation of the turbochargers via wastegate valves. I believe I experienced this up that incline.

Around page 8 of the Engine Management PDF file, the explanation of Bank 1 & Bank 2blow off valves give a great insight to another major reason for lack of turbo lag beside the bi turbos and because of the DI. The main purpose of the blow off valves are to prevent pumping action and fluid dynamic problems downstream of the throttle body when driver lets go of the gas pedal suddenly, but engine management also uses them for another purpose. When the engine is idling, engine management spools up the turbos but the additional boost is relieved through the blow off valves. When power is demanded, the blow off valves are closed and the boost is already there. Viola, reduced turbo lag. This would not be possible without DI. The intake manifold downstream of the throttle body has only air in it and no gasoline, hence the blow off of compressed air back to the intake system.

There is an ongoing discussion, which I don't know of the resolution about one or two oil coolers in manual vs. auto cars. Picus in Canada is especially ticked. It is interesting that the PDF files make no distinction between oil coolers in manual vs. auto cars. However, they do talk about two gear box oil coolers for the auto as well as a heat exchanger between the radiator and primary gear box oil cooler in auto cars.

Shawn
Phoenix
Very good infromation,
I too experienced Engine malfunction! Reduced power/ half engine light on an incline going 70MPH. Today my mechanic explained to me my engine was misfiring randomly on cylinders 3/4. He took a look inside of the block and caught a glimpse of some milky residue.. He said my car may have over heated and the turbos could have something to do with it. I will find out what BMW has to say on Friday when they check everything out. lmk what you guys think.
DoPedUpM3 is offline   United_States
0
Reply With Quote
      09-04-2010, 11:51 PM   #71
pimple
Private
 
Drives: 335i N54
Join Date: Mar 2005
Location: .

Posts: 88
iTrader: (0)

Great info in the documents in this thread. Are there similar documents available now for the N55, by any chance? I noticed a couple pages posted in the following thread that look like they are from the N55 literature:

http://www.e90post.com/forums/showpo...5&postcount=32
Attached Images
  
pimple is offline   United_States
0
Reply With Quote
      11-11-2010, 03:11 PM   #72
jeamps01
First Lieutenant
 
Drives: 2011 335i white
Join Date: Apr 2010
Location: Miami, FL

Posts: 302
iTrader: (2)

bump for previous post, any pdfs like this for n55?
jeamps01 is offline  
0
Reply With Quote
      12-23-2010, 06:07 PM   #73
Rich@GTBPerformance
BimmerPost Supporting Vendor

 
Rich@GTBPerformance's Avatar
 
Drives: 2011 E92 JZB M3, 2000 750iL
Join Date: Dec 2010
Location: NJ, Right outside of NYC

Posts: 4,291
iTrader: (19)

Great read guys, thanks for posting
Rich@GTBPerformance is offline  
0
Reply With Quote
      01-15-2011, 02:26 PM   #74
///MIKE
Second Lieutenant
 
///MIKE's Avatar
 
Drives: E89 35iS
Join Date: Sep 2010
Location: Hong Kong

Posts: 201
iTrader: (0)

great information!! thanks op !
__________________
2012 E89 35iS
///MIKE is offline  
0
Reply With Quote
      01-17-2011, 01:49 PM   #75
Sakebomb
Enlisted Member
 
Drives: 135i
Join Date: Jan 2011
Location: Yorba Linda

Posts: 31
iTrader: (0)

Great Info!
Sakebomb is offline  
0
Reply With Quote
      01-17-2011, 04:30 PM   #76
AlpineWhite335i
Snail race
 
Drives: 2007 Alpine White 335i
Join Date: Mar 2010
Location: Orlando Fl

Posts: 48
iTrader: (3)

nicely done ksfrogman ... nicely done!
AlpineWhite335i is offline  
0
Reply With Quote
      01-20-2011, 10:32 AM   #77
pHo_e92
Captain
 
pHo_e92's Avatar
 
Drives: SGM e92
Join Date: Jan 2011
Location: 905

Posts: 879
iTrader: (4)

Garage List
2008 BMW 335i  [3.63]
2000 BMW 323i  [3.00]
1997 Honda Civic HB  [5.00]
2007 BMW X5 4.8  [5.00]
GOOD READ!
pHo_e92 is offline   Canada
0
Reply With Quote
      01-20-2011, 10:08 PM   #78
GQ335i
First Lieutenant
 
Drives: BMW 335i (E92)
Join Date: Apr 2010
Location: PA/NJ

Posts: 368
iTrader: (5)

Fantastic! Thanks!
__________________
GQ335i is offline   United_States
0
Reply With Quote
      01-22-2011, 01:42 AM   #79
GQ335i
First Lieutenant
 
Drives: BMW 335i (E92)
Join Date: Apr 2010
Location: PA/NJ

Posts: 368
iTrader: (5)

Great write-up!
GQ335i is offline   United_States
0
Reply With Quote
      02-04-2011, 12:10 AM   #80
Boosted John
Internet Ninja
 
Boosted John's Avatar
 
Drives: 13 AH3
Join Date: Jan 2011
Location: Jax, Fl

Posts: 622
iTrader: (0)

awesome thread...
Boosted John is offline  
0
Reply With Quote
      02-23-2011, 03:08 AM   #81
Dilla
New Member
 
Drives: 325i
Join Date: Nov 2010
Location: Grapevine, Tx

Posts: 5
iTrader: (0)

great info! thanks!
Dilla is offline  
0
Reply With Quote
      02-27-2011, 09:37 AM   #82
stops81
New Member
 
stops81's Avatar
 
Drives: E92 335xi Sparkling Graphite
Join Date: Feb 2011
Location: NJ

Posts: 6
iTrader: (0)

Great Read, thanks
stops81 is offline   United_States
0
Reply With Quote
      04-18-2011, 09:19 AM   #83
pimple
Private
 
Drives: 335i N54
Join Date: Mar 2005
Location: .

Posts: 88
iTrader: (0)

N55 document. Thanks to Kalud and others.
Attached Images
File Type: pdf ST916_-_N55_Engine.pdf (3.03 MB, 14833 views)
pimple is offline   United_States
0
Reply With Quote
      04-18-2011, 01:59 PM   #84
kiteboy
First Lieutenant
 
kiteboy's Avatar
 
Drives: E92 Stage 2 BR Performance
Join Date: Apr 2010
Location: France

Posts: 376
iTrader: (0)

Send a message via MSN to kiteboy
Wink

very interesting great !!!

is exist same file .pdf for N54 ?

thanks
kiteboy is offline   France
0
Reply With Quote
      04-27-2011, 03:34 PM   #85
rongomer
boom
 
rongomer's Avatar
 
Drives: 335xi
Join Date: Apr 2011
Location: Varies

Posts: 598
iTrader: (6)

Awesome post, great to print off and keep. Thanks OP!
rongomer is offline  
0
Reply With Quote
      05-21-2011, 10:55 PM   #86
Used2335
Private First Class
 
Drives: Too Slow
Join Date: May 2011
Location: FL

Posts: 111
iTrader: (2)

Fantastic write up. What a great piece of engineering!
Used2335 is offline  
0
Reply With Quote
      05-28-2011, 10:02 AM   #87
TheKuz
Private
 
Drives: 2007 BMW 335i
Join Date: May 2011
Location: Charlotte, NC

Posts: 79
iTrader: (0)

thanks for the post!
TheKuz is offline  
0
Reply With Quote
      07-21-2011, 11:10 PM   #88
Padfan9
2011 BMW 335Is
 
Padfan9's Avatar
 
Drives: 2011 BMW 335is
Join Date: Jun 2011
Location: California

Posts: 160
iTrader: (1)

Quote:
Originally Posted by Panoz View Post
There is also a BMW 3D-video presenting all of these things in an impressive way. Displays in 3D enviroment the fuel that travels through the pipes to the cylinders ,the "explosion" inside them and then the way to turbines ,and out to exhaust.

I'm trying to convice my friend who works on BMW to give it to me.
Then you know what will happens ,don't you?

How do you like your synapse BOV? I have a 2011 335Is and I am getting a BOV but I am not sure if I want the synapse, tial q or hks, everyone says the synapse is great...also how are your other mods doing?
Padfan9 is offline   United_States
0
Reply With Quote
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 05:12 AM.




e90post
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