OEM Exhaust character change

Shost · 05-30-2016, 02:45 AM

I'm fairly convinced that my 1M with its standard exhaust is now making more pops and a bit more burble to its voice.

It could just be my imagination though. Car has done 25k miles and runs Shell Nitro Plus and is otherwise completely standard.

Anyone else noticed this?

mlcgd21 · 05-30-2016, 03:27 AM

I'm exactly in the same situation as you, my car has 20k miles and I think my exhaust is making more pops/burbles aswell, but I'm also not sure if it is my imagination.

It is a strange situation, this morning I think I heard the exhaust crackle when I lift off but I'm never 100% sure. This happened around 5 times already.

Dackelone · 05-30-2016, 05:14 AM

As the exhaust gets carbon'd up over time/miles... the carbon inside the exhaust will change the sound of the exhaust. This is especially true on BMW's Performance Exhausts(PE like for the 135i).

CarJunkie · 05-30-2016, 07:23 PM

I have also noticed it starting at about 20k miles, no complaints!

ORA · 05-30-2016, 10:57 PM

my 1M has 83k miles and makes lots of pops and burbles.....much more than when it had 30k miles.

CarJunkie · 05-31-2016, 08:11 PM

Quote:

Originally Posted by ORA

my 1M has 83k miles and makes lots of pops and burbles.....much more than when it had 30k miles.

So I'll be looking forward to more!

rapter · 06-01-2016, 09:06 PM

I have 39k on mine and I have noticed that with the "m" button presses I am getting more exhaust pops and noises.

Unchanged exhaust in normal driving mode.

smq42 · 06-01-2016, 09:26 PM

Quote:

Originally Posted by Dackelone

As the exhaust gets carbon'd up over time/miles... the carbon inside the exhaust will change the sound of the exhaust. This is especially true on BMW's Performance Exhausts(PE like for the 135i).

Is this why some people get "walnut blasting?"

Yellowceta · 06-02-2016, 10:09 AM

The walnut blasting is done on the intake and top of the valves to remove deposit build up that degrades performance noted usually by hesitation during acceleration. I have never heard of anyone walnut blasting their exhaust system to remove carbon buildup, but that doesn't mean it couldn't be done.

djafactor · 06-02-2016, 01:04 PM

Crazy, I thought it was just me. I'm at 37k kms and when I took him out of hibernation this spring things felt a bit deeper/poppy overall. I've been wanting to do the N55 mid pipe but I'm kind of happy as it is right now.

Amit

EldRick · 06-02-2016, 02:48 PM

I bought Dac's N55 midpipe. Initially, it was a bit quieter, but didn't do that much about the resonances at 2200 and 2800rpm.
Now, 8K miles later, it has quieted considerably - it still has the bass part of the sound, and the resonances are still there, but much quieter. However, it is no longer a loud car - in fact, aside from the bass component, it resembles the sound of a BMW motorcycle on steroids or an M3.
...except for that nice loud POP yesterday that turned a few heads (including mine) when I wound it up and got off the throttle suddenly...
But in general I like a quiet fast car a lot better than a loud fast car.
----------------Update--------------
The loud POP was actually the upper hose coming loose from the charge pipe...

blackmist222777 · 06-02-2016, 03:31 PM

mine does it... i want more

Shost · 06-03-2016, 11:19 AM

Very pleasing that the car is improving with age then. I really thought I was imagining things.

Looking forward to many more miles!

05-30-2016, 02:45 AM	#1
Shost First Lieutenant 25 Rep 302 Posts Drives: 1M Coupe BSM Join Date: Aug 2010 Location: Essex iTrader: (0)	OEM Exhaust character change I'm fairly convinced that my 1M with its standard exhaust is now making more pops and a bit more burble to its voice. It could just be my imagination though. Car has done 25k miles and runs Shell Nitro Plus and is otherwise completely standard. Anyone else noticed this?
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05-30-2016, 03:27 AM	#2
mlcgd21 Second Lieutenant 155 Rep 283 Posts Drives: BMW 1M, G20 BMW 330e Join Date: Sep 2012 Location: Portugal iTrader: (0)	I'm exactly in the same situation as you, my car has 20k miles and I think my exhaust is making more pops/burbles aswell, but I'm also not sure if it is my imagination. It is a strange situation, this morning I think I heard the exhaust crackle when I lift off but I'm never 100% sure. This happened around 5 times already.
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05-30-2016, 05:14 AM	#3
Dackelone European Editor 10539 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	As the exhaust gets carbon'd up over time/miles... the carbon inside the exhaust will change the sound of the exhaust. This is especially true on BMW's Performance Exhausts(PE like for the 135i). __________________ Dackel's European Delivery Museum Guide
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05-30-2016, 07:23 PM	#4
CarJunkie Colonel 2617 Rep 2,819 Posts Drives: e82 1M, f87 M2cs Join Date: Nov 2011 Location: Tri-Cities, Washington iTrader: (1) Garage List 2020 M2cs [0.00] 2011 BMW 1M [0.00]	I have also noticed it starting at about 20k miles, no complaints!
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05-30-2016, 10:57 PM	#5
ORA Banned 43 Rep 140 Posts Drives: VO 1M Join Date: Jul 2011 Location: NYC iTrader: (0)	my 1M has 83k miles and makes lots of pops and burbles.....much more than when it had 30k miles.
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06-01-2016, 09:06 PM	#7
rapter Lieutenant 71 Rep 485 Posts Drives: 1(M)other f*^#er of a car Join Date: Nov 2010 Location: Canada iTrader: (0)	I have 39k on mine and I have noticed that with the "m" button presses I am getting more exhaust pops and noises. Unchanged exhaust in normal driving mode.
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06-02-2016, 10:09 AM	#9
Yellowceta Private First Class 45 Rep 108 Posts Drives: 2011 VO 1M Join Date: Aug 2011 Location: Keller, TX iTrader: (0) Garage List 2011 BMW [0.00]	The walnut blasting is done on the intake and top of the valves to remove deposit build up that degrades performance noted usually by hesitation during acceleration. I have never heard of anyone walnut blasting their exhaust system to remove carbon buildup, but that doesn't mean it couldn't be done. __________________ 1996 Trans Am WS6 (RiP) 2002 Trans Am Collector Edition WS6 - Not Stock @ 425 rwhp 2006 VW GTi - APR Goodies - Sold 2011 1M - VO Florida pick up 11/4/11 #554 of 740 - Sold 2017 ATS-V Stock
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06-02-2016, 01:04 PM	#10
djafactor MINI Member 139 Rep 135 Posts Drives: 89 M3, 1M, e30 touring Join Date: Feb 2008 Location: Montreal iTrader: (0)	Crazy, I thought it was just me. I'm at 37k kms and when I took him out of hibernation this spring things felt a bit deeper/poppy overall. I've been wanting to do the N55 mid pipe but I'm kind of happy as it is right now. Amit __________________ 1M \| e30 M3 \| e30 Touring (M52 swap) \| e36 328i Racecar \| Porsche 911 3.2 \| e91 328xi (N54 swap)
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06-02-2016, 02:48 PM	#11
EldRick Second Lieutenant 27 Rep 231 Posts Drives: 1M VO - #161 US Join Date: Sep 2014 Location: Portland - the Real one - in Oregon iTrader: (0)	I bought Dac's N55 midpipe. Initially, it was a bit quieter, but didn't do that much about the resonances at 2200 and 2800rpm. Now, 8K miles later, it has quieted considerably - it still has the bass part of the sound, and the resonances are still there, but much quieter. However, it is no longer a loud car - in fact, aside from the bass component, it resembles the sound of a BMW motorcycle on steroids or an M3. ...except for that nice loud POP yesterday that turned a few heads (including mine) when I wound it up and got off the throttle suddenly... But in general I like a quiet fast car a lot better than a loud fast car. ----------------Update-------------- The loud POP was actually the upper hose coming loose from the charge pipe... Last edited by EldRick; 06-05-2016 at 10:01 AM..
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06-02-2016, 03:31 PM	#12
blackmist222777 Lieutenant Colonel 403 Rep 1,620 Posts Drives: 2011 BMW 1M Join Date: Apr 2012 Location: SF Bay Area iTrader: (12)	mine does it... i want more __________________ 2023 G80 M3 2020 F87 M2C 2011 E82 BMW 1M Series Coupe Check me out at Point.Shift.Drive (YouTube)
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06-03-2016, 11:19 AM	#13
Shost First Lieutenant 25 Rep 302 Posts Drives: 1M Coupe BSM Join Date: Aug 2010 Location: Essex iTrader: (0)	Very pleasing that the car is improving with age then. I really thought I was imagining things. Looking forward to many more miles!
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