How to code exhaust flaps always open. M440

totalone · 11-25-2022, 11:49 AM

Trying to see of i can code exuast flaps to be always open. Also want to remove fully artificial engine sound
Do I need bimmer code or bimmer link for that.

M440.

nealjay · 11-28-2022, 04:00 PM

yea with bimmerlink it. cost like 50 forgot. exactly. might be cheaper I just paid . plus the adapter .
it has. a menu. says exhaust on. just says open or. close

for the other noise
go there. tells. u about it post 9

https://g20.bimmerpost.com/forums/sh...8#post29579998

totalone · 11-29-2022, 08:53 AM

Quote:

Originally Posted by nealjay

yea with bimmerlink it. cost like 50 forgot. exactly. might be cheaper I just paid . plus the adapter .
it has. a menu. says exhaust on. just says open or. close

for the other noise
go there. tells. u about it post 9

https://g20.bimmerpost.com/forums/sh...8#post29579998

Thank you!
I got bimmer code will just get bimmer link since we have 2 BMWs now. seems to be worth it.

MichaelNRW · 11-29-2022, 08:59 AM

Quote:

Originally Posted by totalone

Trying to see of i can code exuast flaps to be always open. Also want to remove fully artificial engine sound
Do I need bimmer code or bimmer link for that.

M440.

It´s not possible to code the exhaust to be always open without a tune of your engine ECU.
You can only open it with Bimmerlink and it stays open until you stop the engine.
The only way to control the valve are boxes that open the valve at every startup of the engine.
Or you could just do the golf tee mode and drive around with the valve always opened.

totalone · 11-29-2022, 10:32 AM

Quote:

Originally Posted by MichaelNRW

It´s not possible to code the exhaust to be always open without a tune of your engine ECU.
You can only open it with Bimmerlink and it stays open until you stop the engine.
The only way to control the valve are boxes that open the valve at every startup of the engine.
Or you could just do the golf ball mode and drive around with the valve always opened.

Are you saying even though I will select open on valves, car will close them when I shut the engine off, but it will again reopen them on a next start up?

MichaelNRW · 11-29-2022, 10:39 AM

Quote:

Originally Posted by totalone

Are you saying even though I will select open on valves, car will close them when I shut the engine off, but it will again reopen them on a next start up?

The valve needs to be opened with Bimmerlink at every startup.

totalone · 11-29-2022, 01:33 PM

Quote:

Originally Posted by MichaelNRW

The valve needs to be opened with Bimmerlink at every startup.

In your previous post you mentioned "Or you could just do the golf ball mode and drive around with the valve always opened."
What do you mean by that?

whofelt · 11-29-2022, 01:55 PM

Golf ball mode ? What the heck is that? First I’ve heard of that term …

upstate650 · 11-29-2022, 03:30 PM

Quote:

Originally Posted by whofelt

Golf ball mode ? What the heck is that? First I’ve heard of that term …

Golf tee mod. Old BMW trick. Look it up.

totalone · 11-29-2022, 03:34 PM

Quote:

Originally Posted by upstate650

Golf tee mod. Old BMW trick. Look it up.

Oh so basically unplugging the valves connection so it will just stay open always.
I like this idea lol. I think I might just do it.
Do you know if I have to unplug it while car is running in sport mode when flaps are open, or if I unplug it while it is off on the start up it will open the flap?

upstate650 · 11-29-2022, 03:43 PM

Quote:

Originally Posted by totalone

Quote:

Originally Posted by upstate650

Golf tee mod. Old BMW trick. Look it up.

Oh so basically unplugging the valves connection so it will just stay open always.
I like this idea lol. I think I might just do it.
Do you know if I have to unplug it while car is running in sport mode when flaps are open, or if I unplug it while it is off on the start up it will open the flap?

I'm not certain on current exhaust, but I don't think it matters.

MichaelNRW · 11-30-2022, 02:55 AM

Quote:

Originally Posted by totalone

In your previous post you mentioned "Or you could just do the golf ball mode and drive around with the valve always opened."
What do you mean by that?

Sorry, like already mentioned it´s the golf tee mod.

Again, there are three options for the G20.
1. Bimmerlink: You need to connect after every engine start and manually open the valve in the app.
2. Golf tee mod: You need to find the open position of the valve and then remove the plug. I´m not sure if it´s work but you could try to start the engine, stay in park and switch to Sport. Heard this would open the valve.
3. Exhaust Valve Controller: Some shops offer a box that can be hooked to the OBD port or directly wired at the BDC to control the valve. This gives you freedom over the valve and you could close it when needed.
4. Engine tune with valve control: Some engine tunes like MHD offer options like the valve staying open in Sport+.

The valve will be closed when the engine is stopped.
External controls like Bimmerlink or Exhaust Valve Controllers can only change the valve when standing still.
Only methods like the engine tune from MHD can control the valve while driving.
BMW changed something in the behavior and what can trigger the valve to change position.

Sorry for the confusion.

kleitos77 · 12-04-2022, 04:48 PM

You could just get a good axle back exhaust and never worry about this. Always open

JimmyJazz · 12-04-2022, 08:30 PM

This works on my 2020 340. You do have to do it every time you start you car. If you make it one of you favorites, it's two clicks.

totalone · 12-05-2022, 09:22 AM

Quote:

Originally Posted by kleitos77

You could just get a good axle back exhaust and never worry about this. Always open

I have down pipe, and getting AA or Dinan is a bit too loud for my liking. I think I will go down MPE route.

Quote:

Originally Posted by JimmyJazz

This works on my 2020 340. You do have to do it every time you start you car. If you make it one of you favorites, it's two clicks.

Will check this out. Thank you

On the other note, does anyone know, if I turn off engine sound in the cabin will that actually temper with exhaust or that is just sound that is coming from speakers?

G22b58 · 12-05-2022, 09:56 AM

I have turned off ASD (speaker noise) with Bimmer Code in my M440. Engine Sound settings in the menu now effects (very obviously) the exhaust sound (and flap). (It always closes the flap for a short warm up period after a cold start < minute.)

totalone · 12-05-2022, 09:59 AM

Quote:

Originally Posted by G22b58

I have turned off ASD (speaker noise) with Bimmer Code in my M440. Engine Sound settings in the menu now effects (very obviously) the exhaust sound (and flap). (It always closes the flap for a short warm up period after a cold start < minute.)

Got it. Is the instructions are same as someone posted before? My car in service right now so cant go out and take a look at it

NittanyG05 · 02-22-2023, 10:02 PM

Since Bimmerlink you have to open the flaps every time you turn on the engine. Does anyone know if the Foxwell scan tool will just leave the flaps open all the time?

totalone · 02-23-2023, 08:48 AM

Quote:

Originally Posted by NittanyG05

Since Bimmerlink you have to open the flaps every time you turn on the engine. Does anyone know if the Foxwell scan tool will just leave the flaps open all the time?

I coded and my flaps always open. I dont need to open them every time. The only time one of them is closed is when engine is cold and it is trying to warm up.

G22b58 · 02-23-2023, 12:31 PM

@totalone, do your M440 have 2 flaps? I only see one, in the right hand side,
exhaust on my 2021 M440. Or do you have an aftermarket?

totalone · 02-23-2023, 08:23 PM

Quote:

Originally Posted by G22b58

@totalone, do your M440 have 2 flaps? I only see one, in the right hand side,
exhaust on my 2021 M440. Or do you have an aftermarket?

There is always only one. I have only one as well. It will stay closed on warmups, once temp is high enough second one opens up and never closes after that.

I have m440gc 2022

srbs73 · 02-24-2023, 12:45 AM

On my 2020 G21, I've coded the following to give you the Engine Sound menu. I've set mine to always Sport which opens the valve every time you start the engine. Not sure if this is different for M440i / newer builds?

HU_MGU
- CAFD_00003E52
- DISPLAY_MENU_CONFIGURATION_ENGINE_SOUND - Ausgelesen = enabled
- DISPLAY_CONFIGURABILITY_ENGINE_SOUND - Ausgelesen = aktiv

11-25-2022, 11:49 AM	#1
totalone Captain 357 Rep 991 Posts Drives: x5 e45, M440 Join Date: Aug 2021 Location: PENNSYLVANIA iTrader: (0)	How to code exhaust flaps always open. M440 Trying to see of i can code exuast flaps to be always open. Also want to remove fully artificial engine sound Do I need bimmer code or bimmer link for that. M440. __________________ Current: 2022 BMW M440gc / 2022 BMW x5 45e
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11-28-2022, 04:00 PM	#2
nealjay Private 11 Rep 58 Posts Drives: bmw m440 Join Date: Sep 2021 Location: ny iTrader: (0)	yea with bimmerlink it. cost like 50 forgot. exactly. might be cheaper I just paid . plus the adapter . it has. a menu. says exhaust on. just says open or. close for the other noise go there. tells. u about it post 9 https://g20.bimmerpost.com/forums/sh...8#post29579998
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11-29-2022, 01:55 PM	#8
whofelt Lieutenant 465 Rep 525 Posts Drives: 2022 M550ix Join Date: Jan 2022 Location: California iTrader: (0)	Golf ball mode ? What the heck is that? First I’ve heard of that term …
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12-04-2022, 04:48 PM	#13
kleitos77 New Member 14 Rep 21 Posts Drives: BMW M340i soon Join Date: Sep 2021 Location: Asan iTrader: (0)	You could just get a good axle back exhaust and never worry about this. Always open
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12-04-2022, 08:30 PM	#14
JimmyJazz Private First Class 979 Rep 126 Posts Drives: 2020 M340i, 2009 PontiaG8GT, Join Date: Jan 2022 Location: Lubbock TX USA iTrader: (0)	This works on my 2020 340. You do have to do it every time you start you car. If you make it one of you favorites, it's two clicks.
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12-05-2022, 09:56 AM	#16
G22b58 Lieutenant 174 Rep 562 Posts Drives: G22 Join Date: Apr 2021 Location: Europe iTrader: (0)	I have turned off ASD (speaker noise) with Bimmer Code in my M440. Engine Sound settings in the menu now effects (very obviously) the exhaust sound (and flap). (It always closes the flap for a short warm up period after a cold start < minute.)
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02-22-2023, 10:02 PM	#18
NittanyG05 New Member 4 Rep 9 Posts Drives: 22 X5 M50i Join Date: Jun 2022 Location: X iTrader: (0) Garage List 2004 BMW 530i [0.00] 2022 BMW X5 M50i [0.00]	Foxwell Since Bimmerlink you have to open the flaps every time you turn on the engine. Does anyone know if the Foxwell scan tool will just leave the flaps open all the time?
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02-23-2023, 12:31 PM	#20
G22b58 Lieutenant 174 Rep 562 Posts Drives: G22 Join Date: Apr 2021 Location: Europe iTrader: (0)	@totalone, do your M440 have 2 flaps? I only see one, in the right hand side, exhaust on my 2021 M440. Or do you have an aftermarket?
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02-24-2023, 12:45 AM	#22
srbs73 Major 605 Rep 1,221 Posts Drives: BMW iX1 eDrive30 Join Date: Jun 2020 Location: UK iTrader: (0)	On my 2020 G21, I've coded the following to give you the Engine Sound menu. I've set mine to always Sport which opens the valve every time you start the engine. Not sure if this is different for M440i / newer builds? HU_MGU - CAFD_00003E52 - DISPLAY_MENU_CONFIGURATION_ENGINE_SOUND - Ausgelesen = enabled - DISPLAY_CONFIGURABILITY_ENGINE_SOUND - Ausgelesen = aktiv
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