M5POST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   M5POST - BMW M5 Forum > F10 M5 Forum > Engine, Exhaust, Drivetrain Modifications

Post Reply
 
Thread Tools Search this Thread
      02-16-2013, 08:57 PM   #1
nv6425
Lieutenant
8
Rep
401
Posts

Drives: 2013 F10 M5, 2012 740i M-Sport
Join Date: Sep 2011
Location: Houston, TX

iTrader: (0)

Vacuum Lines? Exhaust Valves?

Hey fellas, pardon my ignorance, but what do the vacuum lines do on the OEM exhaust? Do they somehow control the exhaust valves in the cans?

I'm looking for a way to keep the valves open all the time for a bit more sound and would love to be able to do this via coding if possible or some other 15 minute job that doesn't require me to cut open the cans.

Any insight you can provide would be appreciated!
__________________
2014 Black///M5/Comp Package/Executive Package/B&O/20" Wheels/DCT/Black Interior
Past:
2013 Silverstone///M5/Executive Package/B&O/20" Wheels/DCT/Black Interior
2013 Imperial Blue///M5/Executive Package/20" Wheels/DCT/Sakhir Orange
Appreciate 0
      02-16-2013, 10:38 PM   #2
M54ccibo
Major
M54ccibo's Avatar
United_States
34
Rep
1,486
Posts

Drives: '16 GT4
Join Date: Apr 2012
Location: Orange County, CA

iTrader: (0)

Vacuum lines open the actuators on the exhaust. Once the cats are warmed up, the valves open. I am not 100% sure if they close again, but I am pretty sure they don't, and I am very certain they are always open when in M-mode.

If you want the valves opened all the time, no questions, you could pinch or plug the lines and force the valve open mechanically. Not sure that it will buy you much.
__________________
Current: '16 GT4
Past ///Ms:
'13 F10 M5, Alpine Weiss III/Sakhir Orange Full
'10 E60 M5, Space Gray/Black
Appreciate 0
      02-19-2013, 11:50 PM   #3
nv6425
Lieutenant
8
Rep
401
Posts

Drives: 2013 F10 M5, 2012 740i M-Sport
Join Date: Sep 2011
Location: Houston, TX

iTrader: (0)

Thanks for the reply! If I plug the vacuum lines, will the valves stay open by themselves or would they need to be done separately?

Also, can anyone tell me what the vacuum lines look like and what the best way to plug them is?
__________________
2014 Black///M5/Comp Package/Executive Package/B&O/20" Wheels/DCT/Black Interior
Past:
2013 Silverstone///M5/Executive Package/B&O/20" Wheels/DCT/Black Interior
2013 Imperial Blue///M5/Executive Package/20" Wheels/DCT/Sakhir Orange
Appreciate 0
      02-20-2013, 05:50 PM   #4
M54ccibo
Major
M54ccibo's Avatar
United_States
34
Rep
1,486
Posts

Drives: '16 GT4
Join Date: Apr 2012
Location: Orange County, CA

iTrader: (0)

Quote:
Originally Posted by nv6425
Thanks for the reply! If I plug the vacuum lines, will the valves stay open by themselves or would they need to be done separately?

Also, can anyone tell me what the vacuum lines look like and what the best way to plug them is?
I have a couple ideas, but it would be better to contact one of the tuners on the board to be absolutely sure, or, have them verify that you buy something in doing this
__________________
Current: '16 GT4
Past ///Ms:
'13 F10 M5, Alpine Weiss III/Sakhir Orange Full
'10 E60 M5, Space Gray/Black
Appreciate 0
      02-20-2013, 06:55 PM   #5
stealth.pilot
Major General
stealth.pilot's Avatar
United Kingdom
217
Rep
5,577
Posts

Drives: 2014 911 Turbo S
Join Date: Aug 2010
Location: Buckhead

iTrader: (0)

Garage List
Putting the car's poweretrain in Sport+ mode also opens the exhaust valves.
__________________
2014 Porsche 911 Turbo S
2015 Mercedes-Benz C300 Sport 4MATIC
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
Forum Jump


All times are GMT -4. The time now is 03:51 AM.




m5post
m5post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, 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