[suby01]

Originally Posted by R N M

The exhaust sounds is very disappointing on my 2020. It sounds amazing at startup and when you’re really at high RPMs and downshift.

Is there a way to open exhaust valve by pulling fuse with no error code?

[R N M]

^
Thanks very helpful!

Does it make noticeable difference in improving sound?

[freshxdough]

With the valve open all the time and in some modes at certain RPM you can get a drone. It's not very loud or annoying my any means but it is fairly noticeable at certain ranges. I prefer to leave mine plugged in and put in Sport Plus whenever I want to get more noise. I also have a high flow downpipe though so I get more noise as it is.

[Sammy_V]

I’m still waiting on the delivery of my 2020 X3 M40i, especially now with corona and the lock down in Belgium... no clue when the dealership will receive the vehicle and reopen...
but hey, better safe than sory

That said, does anyone know if the sport plus setting has any influence when the engine is still cold or on low rpm’s. For example:
Set to sport plus before you start the engine for an nice cold start sound
Or just set it to sport plus when you calmly cruise around but want to enjoy the better sound ?
Thanks...

[freshxdough]

Originally Posted by Sammy_V

I'm still waiting on the delivery of my 2020 X3 M40i, especially now with corona and the lock down in Belgium... no clue when the dealership will receive the vehicle and reopen...
but hey, better safe than sory

That said, does anyone know if the sport plus setting has any influence when the engine is still cold or on low rpm's. For example:
Set to sport plus before you start the engine for an nice cold start sound
Or just set it to sport plus when you calmly cruise around but want to enjoy the better sound ?
Thanks...

Sport plus before engine doesn't change cold start. However I have noticed that if you turn it off after it's warm, and within like 20 minutes you turn it back on put it in sport plus and it will do like a hot start. It will fire up and burble on the way down to idle. It's pretty sick.

[Sammy_V]

Originally Posted by freshxdough

Sport plus before engine doesn't change cold start. However I have noticed that if you turn it off after it's warm, and within like 20 minutes you turn it back on put it in sport plus and it will do like a hot start. It will fire up and burble on the way down to idle. It's pretty sick.

Thanks !
And now I need to stay patient just a bit longer...

[Joan85]

Hello, I bring good news for people who want to change the exhaust and diffuser, it is from the fi exhaust brand, they have released a complete exhaust compatible with the standard diffuser or the X3M, I leave the video here

[dmicah]

Originally Posted by Joan85

Hola, traigo buenas noticias para las personas que desean cambiar el escape y el difusor, es de la marca de escape fi, han lanzado un escape completo compatible con el difusor estándar o el X3M, les dejo el video aquí

For those of you who don't speak Spanish (as I don't) here's a translation from google with a little adaptation for flow from me:

Hello, I have good news for people who want to change the exhaust and diffuser. This is from the fi exhaust brand. They have released a complete exhaust compatible with the standard diffuser for the X3M. I leave the video here:

Also, here's a link to FI Exhaust:
http://www.fi-exhaust.com/product/bmw/x3-40i.html

Pricing appears to be "if you have to ask..."

Gracias Joan85 !

[Joan85]

Originally Posted by dmicah

For those of you who don't speak Spanish (as I don't) here's a translation from google with a little adaptation for flow from me:

Hello, I have good news for people who want to change the exhaust and diffuser. This is from the fi exhaust brand. They have released a complete exhaust compatible with the standard diffuser that looks like the X3M. I leave the video here:

Also, here's a link to FI Exhaust:
http://www.fi-exhaust.com/product/bmw/x3-40i.html

Pricing appears to be "if you have to ask..."

Gracias Joan85 !

I have already edited it, I have asked as soon as I have news, I will inform you: party0030:

[suby01]

Originally Posted by dmicah

For those of you who don't speak Spanish (as I don't) here's a translation from google with a little adaptation for flow from me:

Hello, I have good news for people who want to change the exhaust and diffuser. This is from the fi exhaust brand. They have released a complete exhaust compatible with the standard diffuser that looks like the X3M. I leave the video here:

Pricing appears to be "if you have to ask..."

Gracias Joan85 !

I typically say its gonna cost about tree fitty.

But in this case I will try to be the closest without going over Bob. Ill have $4,100.

[Joan85]

Originally Posted by suby01

I typically say its gonna cost about tree fitty.

But in this case I will try to be the closest without going over Bob. Ill have $4,100.

Sure, the full exhaust will cost that, just the supersprint rear silencer costs $ 2,800.
The X3M's oem rear diffuser (with all parts other than the m40i) costs around $ 1,100 plus paint: threadjacked:

[car_fan]

Originally Posted by freshxdough

Pretty sure my videos are still in this thread. Nothing changes once broken in. https://www.youtube.com/user/pshean84

The burbles and pops on the 2020 are programmed from the DME to only happen at higher RPM. You have to be around 4-5,000 or higher to get pops. Going around parking lots though you can a little burble in sport plus at slower speeds.

I also found that if you stop somewhere and shut off the engine when you jump back in within like 15 minutes (not sure the exact time cut off) and press sport plus then turn on the car you get a hot start which is like a Roar. It Revs high and burbles coming back down. It's pretty aggressive and it's wild.

With my “18” Every start (cold/warm) is a roar. Whether it be a cold start in the morning or restarting after an hour long drive. It can be obnoxious as hell at times but me and the wife love it Of course it settles down after about 15-20 seconds.

[Timber25]

Originally Posted by freshxdough

Since USA 2020 M40's are being delivered now, I'd just like to ask you guys how the exhaust on the B58T sounds in regards to 2018 or 2019 model year vehicles with the B58.

I recently picked up my 2020 M40i and have noticed that the exhaust note is not the same.
It does not Pop and crackle like the previous years. It's more of what I would consider a gurgling, a very muffled burbling. It sounds like the new X3 M to me.

I was really hoping for the loud cracks and pops from the exhaust but it just isn't the same as the previous years and it's slightly disappointing.

My wife's my20 m40i which we picked up in Dec 2019 sounds amazing.

Just hopped into my new my20 m40i yesterday and right off the bat I knew it was different and I'm very disappointed. Just went for a spirit drive for 45 mins on back country roads. Everything on Sport +. Exhaust note is more "refined" then earlier m40i's to go with the smooth B58. Earlier m40i's had a little bit of a deeper note.

I got a nice short pop on full throttle upshifts but downshifts are without the expected cracks and pops (keeping rpm below 4.5k for now).

I doubt that cat's failing is the reason. Otherwise they'd change all the M3/4's.

My hunch is the timing of this change fits with them rolling the x3m out. Can’t have the little brother sounding better

[shashankufl]

Originally Posted by freshxdough

Don't get me wrong, I love the car and it's everything I spec'd and special ordered.

I did an extended test drive with a 2019 X3 M40i and I've also driven and heard many others and I've loved how loud and obnoxious and crazy it can be with the pops and cracks. And then I drive this home and of course I'm trying to be easy on it but I want to hear a little bit of noise so I flip it to sport and go for some backfires and nothing....... it was a huge reason for me to get an X3 M40i and not an M340i or a sedan

I'll post a video later, but you'll get the best crackles and pops(really lound) when in manual mode, accelerate in 3rd gear(M3) to 6000 rpm and leave the throttle. It backfires like a riffle.a

[freshxdough]

BMW states the change of logic for burbles and pops is due to catalytic converters getting damaged. I don't understand how that's possible considering all the other cars BMW has that pop and burble even more.

[Alias1431]

Originally Posted by freshxdough

BMW states the change of logic for burbles and pops is due to catalytic converters getting damaged. I don't understand how that's possible considering all the other cars BMW has that pop and burble even more.

It is possible the G01 cats are a finer mesh to increase heat to improve emissions? And that's why they get damaged over time?

Disclaimer: I know nothing about this stuff.

[freshxdough]

Originally Posted by Alias1431

It is possible the G01 cats are a finer mesh to increase heat to improve emissions? And that's why they get damaged over time?

Disclaimer: I know nothing about this stuff.

No clue. I have a Catted Downpipe now so I'll blow out this one before my stock one if there's any truth to the reason for the DME changes.

[chicagofan00]

Originally Posted by freshxdough

BMW states the change of logic for burbles and pops is due to catalytic converters getting damaged. I don't understand how that's possible considering all the other cars BMW has that pop and burble even more.

So then if there is any long term damage I would hope BMW would cover this for the full life of the vehicle. If they felt so strongly to change it going forward in new model years because of potential damage then clearly it would be a "design flaw" and should be covered.

I'm thinking it was more a decision to tone it down a bit with release of the X3M(C).

[PostModernHero]

Originally Posted by freshxdough

BMW states the change of logic for burbles and pops is due to catalytic converters getting damaged. I don't understand how that's possible considering all the other cars BMW has that pop and burble even more.

I am personally OK with less "boy racer" noises...

[freshxdough]

I've seen a photo of someone with an X3 M40i, like a 2018 or 2019 and the cat was starting to come apart and melt due to the explosions and heat in the exhaust. I didn't really buy the reason for it but I'm glad I have a Catted Downpipe now even with the different exhaust overrun logic from the previous years. Really cracks and gets wild sometimes when overrun from a high RPM

[Timber25]

Originally Posted by chicagofan00

So then if there is any long term damage I would hope BMW would cover this for the full life of the vehicle. If they felt so strongly to change it going forward in new model years because of potential damage then clearly it would be a "design flaw" and should be covered.

I'm thinking it was more a decision to tone it down a bit with release of the X3M(C).

"Hope" is a bad word when it comes to expecting manufactures to do the right thing...

Case and point. Just sold my e84 2015 x1 (n20). Had to replace the valve cover which was leaking at 60k miles (notorious for this engine).

Popped my hood on my 2020 x3 only to discover that because they use the same principle plastic valve cover on the b58 they were "smart" enough to add a 10 cent stamped metal drip tray to the side of the engine head so when this valve cover decides to leak at <50k miles at least it won't land on the turbo/exhaust manifold. Thanks BMW

[steadyhands]

Not sure if it is new to 2020, but the warm start is very bubbly! Quite nice in comfort and even more so when starting in Sport Plus. Half a dozen little pops are quite amusing.