2010 2011 BMW 5 Series Forum F10
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
 

2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications 535I exhaust flap ?
Post Reply
 
Thread Tools Search this Thread
      06-28-2017, 02:33 AM   #1
Bayerish Reisenden
Private
Germany
104
Rep
98
Posts

Drives: F10 535i M Sport - e31 850csi
Join Date: Oct 2016
Location: Stütgart - Deutschland

iTrader: (0)

535I exhaust flap ?

Hello all,

I've an 535i, and I love the cold start sound, I supose a flap in the exhaust is in a open position right ?
So the question is, can I do something to let it always open ?
I looked under the car and I didn't notice any valve or electrical plug on the exhaust like on the 435i/440i

Someone has an idea ?

Thanks !
Appreciate 0
      06-28-2017, 05:57 AM   #2
Jayphil
Private First Class
Jayphil's Avatar
63
Rep
176
Posts

Drives: 535I xdrive 2011 (M-SPORT)
Join Date: Nov 2014
Location: Canada

iTrader: (0)

Quote:
Originally Posted by Bayerish Reisenden View Post
Hello all,

I've an 535i, and I love the cold start sound, I supose a flap in the exhaust is in a open position right ?
So the question is, can I do something to let it always open ?
I looked under the car and I didn't notice any valve or electrical plug on the exhaust like on the 435i/440i

Someone has an idea ?

Thanks !
The 535i has no exhaust flaps / valves unfortunately. 528i, 550i and M5 do.
__________________
BMW 535I xdrive 2011 M-Sport with H&R Springs, Niche Form Wheels 8.5 ET35 / 10.5 ET35, Continental DSW06 245/35 & 285/30, JB4 Map 5, ER Downpipe, Megan Racing Quad Exhaust with Vibrant resonators, M5 Diffuser, Orange reflector shaved and removed xdrive badge.
Appreciate 0
      06-28-2017, 08:00 AM   #3
Stück
Major
Stück's Avatar
United_States
800
Rep
1,214
Posts

Drives: F15 X5, E46 330i, R56 Mini.S
Join Date: May 2016
Location: Houston, TX

iTrader: (4)

Not true, some 535i's do have vacuum actuated exhaust valves.

Cold start sound has little to nothing to do with the position of that valve however, and more to do with whats being done to rapidly heat the catalyst.
Appreciate 0
      06-28-2017, 08:47 AM   #4
Jayphil
Private First Class
Jayphil's Avatar
63
Rep
176
Posts

Drives: 535I xdrive 2011 (M-SPORT)
Join Date: Nov 2014
Location: Canada

iTrader: (0)

Quote:
Originally Posted by Stück View Post
Not true, some 535i's do have vacuum actuated exhaust valves.

Cold start sound has little to nothing to do with the position of that valve however, and more to do with whats being done to rapidly heat the catalyst.
I did not know that some get those since I never seen any with those. Where are they located since 535I have double exhaust with single outlet?

Most exhaust flap works when there is two path in the muffer and the flap closed force the flow in one of the path which is design to reduce more sound.
__________________
BMW 535I xdrive 2011 M-Sport with H&R Springs, Niche Form Wheels 8.5 ET35 / 10.5 ET35, Continental DSW06 245/35 & 285/30, JB4 Map 5, ER Downpipe, Megan Racing Quad Exhaust with Vibrant resonators, M5 Diffuser, Orange reflector shaved and removed xdrive badge.
Appreciate 0
      06-28-2017, 01:42 PM   #5
Bayerish Reisenden
Private
Germany
104
Rep
98
Posts

Drives: F10 535i M Sport - e31 850csi
Join Date: Oct 2016
Location: Stütgart - Deutschland

iTrader: (0)

I checked mine another time, and I didn't see any flap
Appreciate 0
      10-30-2017, 02:53 PM   #6
Shieldze1025
Keepin' America Free
Shieldze1025's Avatar
United_States
70
Rep
1,260
Posts

Drives: F10 535i
Join Date: Dec 2009
Location: Haleiwa, HI

iTrader: (7)

Quote:
Originally Posted by Stück View Post
Not true, some 535i's do have vacuum actuated exhaust valves.

Cold start sound has little to nothing to do with the position of that valve however, and more to do with whats being done to rapidly heat the catalyst.
Do you have any more info?

I just picked up a '12 535i. Has BMW M Performance exhaust. On any cold start I get a rattle that sounds JUST like my old 335i flap did on start up, basically sounds like the flap isn't fully open or closed and fluttering. But through all of my research I can't find a solid answer on whether they even have valves or not?!?!
__________________
F10 535i | Retired: E60 ///M5 | E92 335i

"If everything seems under control, you're not going fast enough"
-Mario Andretti
Appreciate 0
      10-30-2017, 09:10 PM   #7
Stück
Major
Stück's Avatar
United_States
800
Rep
1,214
Posts

Drives: F15 X5, E46 330i, R56 Mini.S
Join Date: May 2016
Location: Houston, TX

iTrader: (4)

MPerformance cans are straight through rifled chambers, no flap wizardry.
Appreciate 0
      10-31-2017, 01:52 PM   #8
Shieldze1025
Keepin' America Free
Shieldze1025's Avatar
United_States
70
Rep
1,260
Posts

Drives: F10 535i
Join Date: Dec 2009
Location: Haleiwa, HI

iTrader: (7)

Quote:
Originally Posted by Stück View Post
MPerformance cans are straight through rifled chambers, no flap wizardry.
Thanks man, crawled under the car yesterday and didn't see any. Think it's wastegate rattle
__________________
F10 535i | Retired: E60 ///M5 | E92 335i

"If everything seems under control, you're not going fast enough"
-Mario Andretti
Appreciate 0
      06-13-2019, 10:17 PM   #9
dzz
Lieutenant
229
Rep
418
Posts

Drives: 2015 BMW 535xi, MHD Stage 2+
Join Date: Sep 2018
Location: Virginia

iTrader: (0)

Garage List
2015 BMW  [0.00]
is there a way to make F10 535i to always have cold start sound while idling
Appreciate 0
      06-14-2019, 07:58 AM   #10
Unspec
Colonel
Unspec's Avatar
1265
Rep
2,573
Posts

Drives: 2015 BMW 535xi
Join Date: Apr 2019
Location: DMV

iTrader: (1)

Quote:
Originally Posted by dzz View Post
is there a way to make F10 535i to always have cold start sound while idling
Yup, it's called an exhaust.
Appreciate 0
      06-14-2019, 09:02 AM   #11
dzz
Lieutenant
229
Rep
418
Posts

Drives: 2015 BMW 535xi, MHD Stage 2+
Join Date: Sep 2018
Location: Virginia

iTrader: (0)

Garage List
2015 BMW  [0.00]
I guess you are being sarcastic, but cold start sound goes away after a minute or so, and the idling sound becomes very quiet.
My question is if there is a way to make a car always have cold start sound when idling?
Appreciate 0
      06-14-2019, 09:44 AM   #12
neejay
Private First Class
7
Rep
102
Posts

Drives: 2011 535i M-Sport
Join Date: May 2015
Location: Atlanta, GA

iTrader: (0)

Quote:
Originally Posted by dzz View Post
I guess you are being sarcastic, but cold start sound goes away after a minute or so, and the idling sound becomes very quiet.
My question is if there is a way to make a car always have cold start sound when idling?
He was, but he's actually right. The cold start up exhaust tone you hear is related to literally helping the engine on a cold start. I wouldn't imagine you'd want that constantly lol

From another thread: https://f10.5post.com/forums/showpos...47&postcount=4
__________________
2011 535i M-Sport - MHD Stage 2+, xHP Stage 3, FMIC, ER Chargepipe, RM Motors catted d/p, Megan Racing Supremo Exhaust
Appreciate 0
      06-14-2019, 11:23 AM   #13
dzz
Lieutenant
229
Rep
418
Posts

Drives: 2015 BMW 535xi, MHD Stage 2+
Join Date: Sep 2018
Location: Virginia

iTrader: (0)

Garage List
2015 BMW  [0.00]
Quote:
Originally Posted by neejay View Post
He was, but he's actually right. The cold start up exhaust tone you hear is related to literally helping the engine on a cold start. I wouldn't imagine you'd want that constantly lol

From another thread: https://f10.5post.com/forums/showpos...47&postcount=4
Very useful info, I have QTP cutouts (straight piped) and the exhaust sounds really good during the cold start.

I still like cold start sound and I am wondering if there is a way to replicate it (maybe using different method)?
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 03:58 AM.




5post
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