[SC11]

Silly question but what’s the advantage of this say over coding the car to start in Sports Ind?

If you prefer the comfort settings you can code all by the engine to be in comfort?!

That’s if I’m right in thinking on Sports or Sports Plus the valve is always open?!

[supersebbo]

Originally Posted by SC11

Silly question but what’s the advantage of this say over coding the car to start in Sports Ind?

That’s if I’m right in thinking on Sports or Sports Plus the valve is always open?!

Indeed this is where you are mistaken. The flap is not directly affected by the driving mode. Even in Sport+ the flap will be closed at idle while the engine is not up to temperature.

Since disabling ASD I know from experience now that the increase in exhaust volume when switching to Sport+ at idle is 100% artificial from the ASD system and nothing to do with the flap.

[SC11]

Originally Posted by supersebbo

Indeed this is where you are mistaken. The flap is not directly affected by the driving mode. Even in Sport+ the flap will be closed at idle while the engine is not up to temperature.

Since disabling ASD I know from experience now that the increase in exhaust volume when switching to Sport+ at idle is 100% artificial from the ASD system and nothing to do with the flap.

Ok but apart from initial start up once warm and in Sports/Sports + is the valve open from there onwards?

[supersebbo]

Can't say for sure.

The docs state it's a noise-reduction system, not a performance system. It only says that the flap position is calculated from a combination of driving speed, engine speed and load - and that it is closed when idle or close to idle.

https://www.newtis.info/tisv2/a/en/g...lap-2/Im2GgsKi

[SC11]

Originally Posted by supersebbo

Can't say for sure.

The docs state it's a noise-reduction system, not a performance system. It only says that the flap position is calculated from a combination of driving speed, engine speed and load - and that it is closed when idle or close to idle.

https://www.newtis.info/tisv2/a/en/g...lap-2/Im2GgsKi

That’s ok then as I tend to drive it like I stole it once warm

[rem40i]

Did any of you get any error/fault codes or notifications after pulling out F203 and or F218?

[Kozumasbullitt]

Originally Posted by SC11

Ok but apart from initial start up once warm and in Sports/Sports + is the valve open from there onwards?

The valve starts to closes at partial throttle so driving through a parking lot or cruising in traffic, you won't get the full experience.

[MechX3M40i]

Originally Posted by Kozumasbullitt

The valve starts to closes at partial throttle so driving through a parking lot or cruising in traffic, you won't get the full experience.

is this true only in non-Sport modes? Can't imagine getting all the pops and crackles in Sport when one of those exhaust pipes is partially or toally closed :

[chicagofan00]

Originally Posted by supersebbo

It is my belief that the flap defaults to open when the engine is switched off. I think you should be good to go.

In any case it is easy to check, just pull the fuse and start the car, it's pretty easy to see/feel if exhaust gas is coming out of the left pipe.

I'll give it a shot. Easy enough to put it the fuse back in if it isn't and then drive around for a bit and then pull.

Did you try pulling the F208 fuse and leave the ASD fuse in first to see how it sounds? Or were you in general not a fan of ASD and wanted that off regardless? I personally don't mind ASD and like the sounds I've been hearing in the cabin so far.

[SC11]

Originally Posted by Kozumasbullitt

The valve starts to closes at partial throttle so driving through a parking lot or cruising in traffic, you won't get the full experience.

Are you sure on this? Can’t say I’ve heard of that when in sports mode.

Didn’t happen on my M135i will have to look more into this.

[Bouliboule]

Originally Posted by SC11

Are you sure on this? Can’t say I’ve heard of that when in sports mode.

Didn’t happen on my M135i will have to look more into this.

I have disable ASD on my m40i.
I can assure you that the valve is dependent with the driving mode.(you can ear it when you switch between the diffrent driving modes ) and it is on/off valve.
Eco : closed
comfort : closed
Sport individual : open (even if it is setup all in comfort, so you can drive your car in comfort mode but with open valve.
Spot/sport+: open.

Another thing has to be said, the opening of the valve is not depedant with the revs.
Valve with remain closed during the cold start and will open when it is finished (30s)

[SC11]

Originally Posted by Bouliboule

I have disable ASD on my m40i.
I can assure you that the valve is dependent with the driving mode.(you can ear it when you switch between the diffrent driving modes ) and it is on/off valve.
Eco : closed
comfort : closed
Sport individual : open (even if it is setup all in comfort, so you can drive your car in comfort mode but with open valve.
Spot/sport+: open.

Another thing has to be said, the opening of the valve is not depedant with the revs.
Valve with remain closed during the cold start and will open when it is finished (30s)

Yep so have I, coded ASD off and start in Sports Ind and as said I’ve never heard of the valve opening/closing while driving other than if you are switching between modes (obviously aware of the start up procedure)

[Kozumasbullitt]

Originally Posted by SC11

Are you sure on this? Can’t say I’ve heard of that when in sports mode.

Didn’t happen on my M135i will have to look more into this.

Looking at the electronics and the BMW delete plug, I don't believe the valve is simply open or closed and the flap is variable. Although you may hear cracks and pops in Sport Mode, that doesn't mean the valve is all the way open. In addition, three was good documentation posted in this thread on the valve and its function. Those that have not performed a flap mod can experiment on what happens in Sport Mode during idle, you can see the valve position from the tailpipe with a flashlight.

[SteveX3M40i]

Originally Posted by Bouliboule

I have disable ASD on my m40i.
I can assure you that the valve is dependent with the driving mode.(you can ear it when you switch between the diffrent driving modes ) and it is on/off valve.
Eco : closed
comfort : closed
Sport individual : open (even if it is setup all in comfort, so you can drive your car in comfort mode but with open valve.
Spot/sport+: open.

Another thing has to be said, the opening of the valve is not depedant with the revs.
Valve with remain closed during the cold start and will open when it is finished (30s)

Hi,
My wife was just going to work and I happened to be near the back of her car when she started it, from cold (in comfort mode).
It is very noisy for first 30 seconds after startup - both exhaust outlets were working from the second that car started up.
She drove away before the sound got quieter - so do not know if the valve subsequently closed and reverted to right hand pipe only.
It’s a warmish day here - outside temperature is about 24 degrees C (don’t know if outside temperature affects the exhaust flap position)
I plan to remove fuse 203 when car is cold and before it is next started, to see if I can get both sides of exhaust to stay open all the time.
Cheers
Steve

[chicagofan00]

Originally Posted by SteveX3M40i

Hi,
My wife was just going to work and I happened to be near the back of her car when she started it, from cold (in comfort mode).
It is very noisy for first 30 seconds after startup - both exhaust outlets were working from the second that car started up.
She drove away before the sound got quieter - so do not know if the valve subsequently closed and reverted to right hand pipe only.
It's a warmish day here - outside temperature is about 24 degrees C (don't know if outside temperature affects the exhaust flap position)
I plan to remove fuse 203 when car is cold and before it is next started, to see if I can get both sides of exhaust to stay open all the time.
Cheers
Steve

Let me know the results. I plan on doing the same thing but haven't had the time just yet.

[SteveX3M40i]

Originally Posted by chicagofan00

Let me know the results. I plan on doing the same thing but haven't had the time just yet.

Hi,
So finally got round to pulling fuse 203 today.
Car was cold
Pulled fuse 203
Started engine - both sides of exhaust were working during the startup noisy phase.
After 30 seconds or so, car settled to quieter idle
Exhaust was still coming out of both sides
Replaced trim around fuse box
Total time - less than 5 minutes
Job done!
Cheers
Steve

[chicagofan00]

Originally Posted by SteveX3M40i

Hi,
So finally got round to pulling fuse 203 today.
Car was cold
Pulled fuse 203
Started engine - both sides of exhaust were working during the startup noisy phase.
After 30 seconds or so, car settled to quieter idle
Exhaust was still coming out of both sides
Replaced trim around fuse box
Total time - less than 5 minutes
Job done!
Cheers
Steve

Awesome! I'll be doing this as soon as I get a chance. Thanks for letting me know.

Did you also pull the fuse for ASD?

[SteveX3M40i]

Originally Posted by chicagofan00

Awesome! I'll be doing this as soon as I get a chance. Thanks for letting me know.

Did you also pull the fuse for ASD?

Yes - did that last week - fuse 218

[RowanBuds]

Originally Posted by supersebbo

Pretty good audible comparison here, this is with the Juice Box JB4 system (note: not currently working with G01 digital dash)

but what is going on with the fuel gauge in this video

[fsugatorbait]

Originally Posted by RowanBuds

but what is going on with the fuel gauge in this video

I believe the JB4 has an option to hijack the fuel gauge to show psi instead.

[chicagofan00]

I pulled fuses 218 and 203 this afternoon. I started the car up and both sides of the exhaust were working, I then waited for it to drop down below the 1k RPM mark and both sides continued to work. I didn't get a chance to drive it around yet so we'll see how it goes on this afternoon's commute.

This will be the first time driving it without ASD as well so I'm curious to see if I notice much of a difference or not. Personally, I never had much of an issue with ASD but since others on here have commented that it sounds much better without it, I figured I might as well pull the fuse while I was in there.

[SteveX3M40i]

Originally Posted by chicagofan00

I pulled fuses 218 and 203 this afternoon. I started the car up and both sides of the exhaust were working, I then waited for it to drop down below the 1k RPM mark and both sides continued to work. I didn't get a chance to drive it around yet so we'll see how it goes on this afternoon's commute.

This will be the first time driving it without ASD as well so I'm curious to see if I notice much of a difference or not. Personally, I never had much of an issue with ASD but since others on here have commented that it sounds much better without it, I figured I might as well pull the fuse while I was in there.

We like it - be keen to get your feedback