[ajbM4cab]

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On start up the exhaust sound is deep and a lot louder. However when driving and switching between drive modes comfort sport and sport plus I cannot really hear much change in sound.
My M240i F23 and certainly the F83 M4 definately have a big difference in exhaust tones between modes
Is this normal.

Thanks in advance.

[Th3Walrus]

On startup you're hearing the cold start mode which has the wastegates open.

[ajbM4cab]

Originally Posted by Th3Walrus

On startup you're hearing the cold start mode which has the wastegates open.

Thanks for reply.

It’s when driving on different drive modes it just dosent seem much different.
Certainly nowhere near the contrast my F series M4 comp gives.

[Th3Walrus]

Efficient engine mode has the valves closed. Sport and Sport Plus opens them, if the exhaust sound button is on (green light on). I notice a difference when switching from Efficient to Sport Plus, or pressing the exhaust sound button off/on. But no, it's not as pronounced as it is on an M3/M4.

[Must_Go_FASTER]

Highly recommend a valve controller. Stock settings do not allow the valves to be open 100% nor can they be programmed to be. I went with the SST controller, great quality and price.

[Kevin_The_Clean1]

Originally Posted by Th3Walrus

On startup you're hearing the cold start mode which has the wastegates open.

I wish my X3 MC could sound burly like this all the time. I love when the DME is getting the cats warmed up & opens the wastegates up during this cold start feature. It's a glorious healthy rumble the S58 makes in Sports + on the Competition models.

[Gfit]

You can buy the controller, which I did on my previous 22 M3, or use steel zip ties to keep the valves open. Threads on how to do it. I did the zip ties on my 23 X3M and 24 X5M. Free and takes 10 min or so. Keep in mind that they are then always open which I don’t mind.

[Must_Go_FASTER]

Originally Posted by Gfit

You can buy the controller, which I did on my previous 22 M3, or use steel zip ties to keep the valves open. Threads on how to do it. I did the zip ties on my 23 X3M and 24 X5M. Free and takes 10 min or so. Keep in mind that they are then always open which I don’t mind.

Zip ties?? Wtf lol

If it works, it works. Kinda surprised I haven't seen any info on that