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2Addicts | BMW 2-Series forum Technical Topics B58 (M240i) Engine, Transmission, Exhaust, Tuning Stock exhaust note

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      10-27-2016, 07:53 PM   #1
Sunny_M240I
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Stock exhaust note

Just wondering if the exhaust note changes when put the M240i in sport mode. I know other BMW's do.
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      10-27-2016, 09:12 PM   #2
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Yeah- same valve system that opens and closes.
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      10-27-2016, 09:56 PM   #3
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Quote:
Originally Posted by Questofthetune View Post
Yeah- same valve system that opens and closes.
is it a noticeable difference?

thanks for the quick response.
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      10-29-2016, 05:04 PM   #4
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Assuming it's similar to 235 yes, it'll give you a louder growl as well as the pops on decel. It also kicks the ASD in the cabin up as well which does increase sound (if that's your thing).
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      10-30-2016, 10:14 AM   #5
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Quote:
Originally Posted by Questofthetune View Post
Assuming it's similar to 235 yes, it'll give you a louder growl as well as the pops on decel. It also kicks the ASD in the cabin up as well which does increase sound (if that's your thing).
I test drove a 235 and bought a 240. The difference between sport and comfort is not as pronounced in the 240 as it was in the 235. It's there, but it's subtle.
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      11-07-2016, 05:09 PM   #6
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How does the m235 sound compared to the m240? about the same or does the b58 have a character of it's own?
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      11-20-2016, 06:02 PM   #7
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FWIW...I unplugged the exhaust valve actuator on my ex-GF's car and it sounds better. Not too loud, but a nice bit throatier. Beyond that, an MPE would be even better.
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      11-20-2016, 08:28 PM   #8
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I find the difference between sport and sport+ much more pronounced in the M240i.
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      11-22-2016, 04:24 PM   #9
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Quote:
Originally Posted by Powaup View Post
How does the m235 sound compared to the m240? about the same or does the b58 have a character of it's own?
The M235i is great (N55 engine) and the M240i (B58 engine) is awful !
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      11-22-2016, 04:32 PM   #10
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Originally Posted by AlexM240i View Post
Quote:
Originally Posted by Powaup View Post
How does the m235 sound compared to the m240? about the same or does the b58 have a character of it's own?
The M235i is great (N55 engine) and the M240i (B58 engine) is awful !
Care to explain
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      11-22-2016, 04:33 PM   #11
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Quote:
Originally Posted by Powaup View Post
Care to explain

I just posted a thread.

http://www.2addicts.com/forums/showthread.php?t=1327353
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      11-23-2016, 12:46 AM   #12
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Quote:
Originally Posted by AlexM240i View Post
The M235i is great (N55 engine) and the M240i (B58 engine) is awful !
"awful" is a little overly dramatic, no? If you want more sound, get the MPE, as it does not have a valve so it runs open 100% of the time and sounds good. If you want to add more engine sound, try adding the Sprint Booster. It is only to advance the throttle delay algorithm, but since more fuel is called for more rapidly, it actually gives the car a slightly more agressive sound, plus sharper throttle response. I put one on my Ex-GF's M235iX and my own F80. Improves driveability considerably.
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      11-23-2016, 06:13 AM   #13
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Quote:
Originally Posted by mc3456 View Post
"awful" is a little overly dramatic, no? If you want more sound, get the MPE, as it does not have a valve so it runs open 100% of the time and sounds good. If you want to add more engine sound, try adding the Sprint Booster. It is only to advance the throttle delay algorithm, but since more fuel is called for more rapidly, it actually gives the car a slightly more agressive sound, plus sharper throttle response. I put one on my Ex-GF's M235iX and my own F80. Improves driveability considerably.
I already ordered the MPE.
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      11-28-2016, 11:12 AM   #14
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It definitely doesn't sound awful. It sounds naturally aspirated, and I think that's what BMW was trying to go for.
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