Did your BMW Performance Exhaust get louder over time?

jss1 · 11-24-2013, 04:54 PM

If so, how did it take for you to notice. Thanks in advance.

Denk · 11-24-2013, 05:25 PM

I noticed a nice little spike in the volume at ~3k rpm's ~5 months into the MPE.
That was 1.5 years ago, no noticeable changes since.

jrse92m3 · 11-24-2013, 06:01 PM

Yes between 2500 and 3K rpm it get louder after 1000 miles

hpc3 · 11-24-2013, 08:31 PM

Quote:

Originally Posted by jss1

If so, how did it take for you to notice. Thanks in advance.

or I'm just used to it now.

FogCityM3 · 11-24-2013, 09:23 PM

Yes, definitely got louder as the fiberglass in the cans melts over time. It got to its present volume after about 6 months/8k miles. Especially there is a louder resonance (wouldn't say drone as it is not annoying) right around 3,900-4,000 rpm.

Keynesallacy · 11-24-2013, 09:58 PM

It's not enough to just look at bearing clearance unless you also look at journal size. It's the ratio of clearance to journal size that is the all important piece of information we want out of this.

11-24-2013, 04:54 PM	#1
jss1 New Member 1 Rep 14 Posts Drives: 2013 M3 Join Date: Sep 2013 Location: Kentucky iTrader: (0)	Did your BMW Performance Exhaust get louder over time? If so, how did it take for you to notice. Thanks in advance. __________________
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11-24-2013, 05:25 PM	#2
Denk Brigadier General 1006 Rep 3,341 Posts Drives: 2021 X5M Join Date: May 2011 Location: PNW iTrader: (2)	I noticed a nice little spike in the volume at ~3k rpm's ~5 months into the MPE. That was 1.5 years ago, no noticeable changes since.
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11-24-2013, 06:01 PM	#3
jrse92m3 Private First Class 3 Rep 117 Posts Drives: white E92 M3 Join Date: Jan 2013 Location: Whitestone NY iTrader: (0)	Yes between 2500 and 3K rpm it get louder after 1000 miles
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11-24-2013, 09:23 PM	#5
FogCityM3 Colonel 499 Rep 2,400 Posts Drives: M3 (E90) & Porsche GT3 RS Join Date: Feb 2012 Location: San Francisco iTrader: (0)	Yes, definitely got louder as the fiberglass in the cans melts over time. It got to its present volume after about 6 months/8k miles. Especially there is a louder resonance (wouldn't say drone as it is not annoying) right around 3,900-4,000 rpm.
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11-24-2013, 09:58 PM	#6
Keynesallacy Registered 0 Rep 2 Posts Drives: bmw Join Date: Nov 2013 Location: london iTrader: (0)	It's not enough to just look at bearing clearance unless you also look at journal size. It's the ratio of clearance to journal size that is the all important piece of information we want out of this. __________________ The most attractive Charming Flower Legging is its soft and delicate embroidery designs.
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