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


Go Back   ZPOST > BMW Z4 Technical Talk > Engine, Exhaust, Drivetrain Modifications
  TireRack

SUPPORT ZPOST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
Post Reply
 
Thread Tools Search this Thread
      10-25-2007, 02:35 PM   #1
Jay Slay
Half Man, Half Amazing
Jay Slay's Avatar
United_States
75
Rep
558
Posts

Drives: 2008 335i
Join Date: Sep 2007
Location: Mount Vernon, NY

iTrader: (0)

Helping a friend - Exhaust Bypass Valve

I own a 335 E92..he has a Z4M and needs help finding electronic exaust bypass valve. Does this exsist? Or am I on a wild goose chase.
__________________

Instagram - jay__slay
15' NISSAN GTR ALPHA 9
14' Audi RS7 / NARDO GREY / ADV1
Appreciate 0
      10-25-2007, 03:42 PM   #2
Feyd
Major
Feyd's Avatar
344
Rep
1,288
Posts

Drives: a DEEZZULL
Join Date: Aug 2007
Location: Chicago, IL

iTrader: (2)

looking for something like this?

http://store.summitracing.com/partde...5&autoview=sku
Appreciate 0
      10-25-2007, 07:21 PM   #3
Jay Slay
Half Man, Half Amazing
Jay Slay's Avatar
United_States
75
Rep
558
Posts

Drives: 2008 335i
Join Date: Sep 2007
Location: Mount Vernon, NY

iTrader: (0)

perfect..thanks so much!
__________________

Instagram - jay__slay
15' NISSAN GTR ALPHA 9
14' Audi RS7 / NARDO GREY / ADV1
Appreciate 0
      10-27-2007, 02:09 PM   #4
Palantirion
First Lieutenant
Palantirion's Avatar
United_States
16
Rep
385
Posts

Drives: Z4 MC, M5, 540iT
Join Date: Aug 2007
Location: SoCal

iTrader: (0)

Bear in mind that he will LOSE power by bypassing the exhaust. You can only increase flow a little bit without the DME panicking into safe mode and retarding the engine. So far I have not found any software that will fool the DME.
__________________
Appreciate 0
      10-29-2007, 05:33 PM   #5
pbdm4k
Lieutenant Colonel
pbdm4k's Avatar
Canada
73
Rep
1,689
Posts

Drives: 2010 335d
Join Date: May 2007
Location: North of the Border

iTrader: (3)

I dont see why this would be a problem if you install these post cat/rear o2 sensor.

so it could be like a free flow cat back.
Appreciate 0
      10-31-2007, 02:07 AM   #6
Palantirion
First Lieutenant
Palantirion's Avatar
United_States
16
Rep
385
Posts

Drives: Z4 MC, M5, 540iT
Join Date: Aug 2007
Location: SoCal

iTrader: (0)

Quote:
Originally Posted by pbdm4k View Post
I dont see why this would be a problem if you install these post cat/rear o2 sensor.

so it could be like a free flow cat back.
-Because the O2 sensors on BMWs also measure impulse speed. If the exhaust is flowing too much faster than expected, the DME starts turning down power. It is VERY irritating! Simulators could be a solution, but I haven't researched them enough to make any recommendations.
__________________
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



All times are GMT -5. The time now is 04:53 PM.




zpost
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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