BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      01-18-2013, 01:59 AM   #1
1SER135
Private First Class
Australia
22
Rep
112
Posts

Drives: '08 135i M SPORT 6M
Join Date: Jun 2012
Location: Perth, Australia

iTrader: (0)

Code Active Exhaust Valve

Is there any way to code the 135i, exhaust flap to open at certain RPM/Throttle instead of this closing to warm the engine up faster.
What I want is to re-weld this only a quad exhaust system im getting to that it open two tips under WOT or >2500RPM. It must be possible, just wondering how easy/hard it is to do.
Appreciate 0
      01-18-2013, 02:37 AM   #2
CrustyNoodle
First Lieutenant
Australia
12
Rep
317
Posts

Drives: 135i DCT
Join Date: Jun 2011
Location: Melbourne, Australia

iTrader: (0)

I like the you are thinking... Been thinking about doing a similar thing myself.

Before you get too concerned about programming it though, I suggest you do some logging to understand its default operation. I think you might find that it pretty much operates as you want it to.

Let us know your results.
__________________
BMW - 135i DCT
Audi - Q5 3.0TDI
Appreciate 0
      01-18-2013, 04:18 AM   #3
Bmwbreed
Major
United_States
58
Rep
1,198
Posts

Drives: 2013 BMW 135i
Join Date: Jul 2012
Location: Rota Spain (US Forces)

iTrader: (3)

Quote:
Originally Posted by CrustyNoodle View Post
I like the you are thinking... Been thinking about doing a similar thing myself.

Before you get too concerned about programming it though, I suggest you do some logging to understand its default operation. I think you might find that it pretty much operates as you want it to.

Let us know your results.
Just what I was going to say. It was designed from the factory to open up I above 2500 or 3000 rpm but closed below that for increased back pressure
Appreciate 0
      01-18-2013, 08:19 PM   #4
CrustyNoodle
First Lieutenant
Australia
12
Rep
317
Posts

Drives: 135i DCT
Join Date: Jun 2011
Location: Melbourne, Australia

iTrader: (0)

From playing around with the "golf tee" trick (unplugging the wire to the solenoid valve does the same thing and is less of a hack) I found that the valve seems to be there to reduce an exhaust resonance around the 2,000 - 2,500 rpm mark (I didn't log it, I'm just going by ear). It seems as though the valve is only really closed around these engine speeds when on part throttle which means that it would be a perfect thing to add to an after market exhaust (with some additional plumbing) to reduce the annoying resonance whilst allowing the desired sound when you want it.
__________________
BMW - 135i DCT
Audi - Q5 3.0TDI
Appreciate 0
      01-18-2013, 10:00 PM   #5
Boosted1
Private First Class
5
Rep
126
Posts

Drives: 135i n54
Join Date: Jul 2010
Location: Mex

iTrader: (0)

If you ever get JB4, its already an option, just activate it and you're good to go.
Appreciate 0
      01-20-2013, 09:17 AM   #6
1SER135
Private First Class
Australia
22
Rep
112
Posts

Drives: '08 135i M SPORT 6M
Join Date: Jun 2012
Location: Perth, Australia

iTrader: (0)

I have COBB AP, is there any way to code it via a COBB custom tune? I want it to be open in all throttle situations above 40% and/or 2500RPM, in other words no loud exhaust when cruising. My setup is going to be very similiar to Akrapovic's, the two inner tips will be muffled while the outer two will not be.
Appreciate 0
      01-20-2013, 03:50 PM   #7
pwn
Private
16
Rep
88
Posts

Drives: 2010 Cayman S
Join Date: Nov 2011
Location: bay area, ca

iTrader: (1)

Is the exhaust flap a custom mod? Do we have a flap from factory??
Appreciate 0
      01-20-2013, 03:55 PM   #8
AlBinVA
Private First Class
14
Rep
111
Posts

Drives: 08 135 vert
Join Date: Jun 2011
Location: Richmond VA

iTrader: (1)

Maybe the aftermarket can get involved

I had a C6 Z06 and there was an aftermarket module available (Mild 2 Wild) that allowed you to select the flapper (open or close) by using a remote control fob.

The install was the removal of a fuse and replacing it with a fused transmitter that spoke to the fob. It cost around $100 and gave you open pipes on demand.

http://www.nakidparts.com/id25h.html
Appreciate 0
      01-20-2013, 10:26 PM   #9
1SER135
Private First Class
Australia
22
Rep
112
Posts

Drives: '08 135i M SPORT 6M
Join Date: Jun 2012
Location: Perth, Australia

iTrader: (0)

There are alot of options with a FOB to open and close it. But im looking for something abit more proactive. Im not sure exactly how the factory flap works and there is alot of variation as to what people say it does aswell. If someone from cobb or someone that knows coding can tell me if its possible to code this that would be great.
Appreciate 0
      04-06-2013, 08:33 PM   #10
1SER135
Private First Class
Australia
22
Rep
112
Posts

Drives: '08 135i M SPORT 6M
Join Date: Jun 2012
Location: Perth, Australia

iTrader: (0)

Come on guys, someone here must know if the flap is code able. I want it to open under certion conditions. Can someone please chime in and help me out
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 06:10 AM.




1addicts
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