BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
 
Alpine HID
Post Reply
 
Thread Tools Search this Thread
      01-14-2012, 10:27 AM   #1
Schwaben
Private First Class
 
Schwaben's Avatar
 
Drives: 2012 X5 35D
Join Date: Jan 2011
Location: Germany

Posts: 104
iTrader: (0)

How loud is your exhaust?

Starting this thread so people can get an actual idea of how loud different exhaust systems are instead of always asking, "what is louder".

I just ordered a simple decibel meter off Amazon for around 30 bucks.

In order to have some consistency between parties here are some guidelines;

1. Have vehicle outside and warmed up.

2. Hold db meter approximately ONE meter away from exhaust at waist level.

3. Slowly rev the motor to 5000 rpm, read meter.

This is fairly close to the procedure used at German tracks and by German TUV (2/3 of motor max rpm for the M3 is 5478 rpm but hey 5000 will do). Its obviously not the loudest you can get it but it will be a consistent measure. Plus I don't want to wrap my motor out without it being under load.

Post your results as follows:

E90 M3
Misterschaft GT2 axle back
Stock X pipe
db @ 5000 rpm: 112.1


Yes it gets louder, for example I got 118.6 at 7000 rpm in my garage but then thats cheating. I understand that there are still a lot of variables left out there such as temp and humidity and some may question the quality of different meters. I can say for sure that an Iphone or other smart phone "decibel meter" ap will not do it for you. I downloaded a free one for android and it was telling me 80db under the same conditions.

Hope to see more readings soon! I will update this as other members post to build a data base.
Schwaben is offline  
0
Reply With Quote
      01-14-2012, 10:33 AM   #2
1SICKM
Captain
 
1SICKM's Avatar
 
Drives: 2009 M3 E92
Join Date: Oct 2010
Location: Mansfield, NJ

Posts: 945
iTrader: (5)

Dont have reader either but my wife can hear me coming a mile away.

Gintani Catless Xpipe
Borla Race rear
__________________
E92 M3 DCT...Powered by ESS VT2 650/DCT GTS Software/Aquamist HFS-3 50/50/Morr /Toyo R888's

CURRENT WORLD RECORD HOLDER 1/4 MILE - 12/7/12 (ESS VT2 625, Meth Off)
ATCO RACEWAY: 10.65 @ 131.79MPH 1.725 60FT
1SICKM is offline  
0
Reply With Quote
      01-14-2012, 06:05 PM   #3
mshab356
Go ///M or go home
 
mshab356's Avatar
 
Drives: a ///Monster
Join Date: Jan 2007
Location: Northern VA

Posts: 730
iTrader: (2)

I have Active Autowerke with stock x-pipe. It is a decent amount louder than stock, it has more of the unique muscle V8/German exotic high pitch to it. My friend could hear me before she saw me when I was driving into her neighborhood today. I wouldn't say it was LOUD though.
__________________
2011.5 SG E92 ///M3 6MT | CF kidney grills | IND SG painted side grills w/ tinted lenses | Painted bumper reflectors | TMS 90mm stud kit | Rear fog light mod | Active Autowerke exhaust |

mshab356 is offline   United_States
0
Reply With Quote
      01-14-2012, 06:18 PM   #4
TRY...M3
Major
 
TRY...M3's Avatar
 
Drives: Depends on the day
Join Date: Nov 2010
Location: PA

Posts: 1,432
iTrader: (2)

Quote:
Originally Posted by SehrSchnell View Post
I don't have a reader, but mine is load as f@ck!

Dinan-X-pipe (middle race exhaust - no cats)

and

Eisenmann Race

LMAOOO "loud as f@ck!" good enough for me!
TRY...M3 is offline   United_States
0
Reply With Quote
      01-14-2012, 07:04 PM   #5
E90///M3`
Major General
 
Drives: 2008 E90M3
Join Date: Jan 2009
Location: Daly City -4- Work///Camarillo is Home

Posts: 5,278
iTrader: (3)

Garage List
2008 BMW E90 M3  [3.80]
i'd like to get my hands on a decibel meter to test... anyone want to let me borrow one? haha

one of the louder exhaust set-ups i've ever heard out there though:

Mastermind RACE X-Pipe & Arqray Non-JASMA RACE Muffler
__________________
- Jason P
:Have: 08 E90M3, Varis VRS Front Lip, LS3, ESS Supercharger, Arqray Exhaust, Neez Wheels
:Want: VRS Carbon GT Wing & Cooling Bonnet, LCI Taillights
:Videos: EnvyRidesTV, GPR 1, GPR 2, GPR 3, ///MFEST
E90///M3` is offline   Philippines
0
Reply With Quote
      01-14-2012, 07:06 PM   #6
kitw
Colonel
 
kitw's Avatar
 
Drives: 2013 C4S cab/2011 E90 M3
Join Date: Jun 2007
Location: Bay Area, CA

Posts: 2,198
iTrader: (14)

This isn't a good test as a free rev is totally different than the exhaust under load.
kitw is offline  
0
Reply With Quote
      01-14-2012, 07:10 PM   #7
E90///M3`
Major General
 
Drives: 2008 E90M3
Join Date: Jan 2009
Location: Daly City -4- Work///Camarillo is Home

Posts: 5,278
iTrader: (3)

Garage List
2008 BMW E90 M3  [3.80]
Quote:
Originally Posted by kitw View Post
This isn't a good test as a free rev is totally different than the exhaust under load.
i was actually thinking the same thing... when i free-rev it's definitely not as loud as under load
__________________
- Jason P
:Have: 08 E90M3, Varis VRS Front Lip, LS3, ESS Supercharger, Arqray Exhaust, Neez Wheels
:Want: VRS Carbon GT Wing & Cooling Bonnet, LCI Taillights
:Videos: EnvyRidesTV, GPR 1, GPR 2, GPR 3, ///MFEST
E90///M3` is offline   Philippines
0
Reply With Quote
      01-14-2012, 07:30 PM   #8
M_BYEEE
Brigadier General
 
M_BYEEE's Avatar
 
Drives: Space Gray M3
Join Date: Oct 2009
Location: Camarillo, CA

Posts: 3,066
iTrader: (6)

Quote:
Originally Posted by E90///M3` View Post
i'd like to get my hands on a decibel meter to test... anyone want to let me borrow one? haha

one of the louder exhaust set-ups i've ever heard out there though:

Mastermind RACE X-Pipe & Arqray Non-JASMA RACE Muffler
haha you might have most others beat on this challenge jason
__________________
M_BYEEE is offline   United_States
0
Reply With Quote
      01-14-2012, 07:32 PM   #9
M_BYEEE
Brigadier General
 
M_BYEEE's Avatar
 
Drives: Space Gray M3
Join Date: Oct 2009
Location: Camarillo, CA

Posts: 3,066
iTrader: (6)

Quote:
Originally Posted by kitw View Post
This isn't a good test as a free rev is totally different than the exhaust under load.
Quote:
Originally Posted by E90///M3` View Post
i was actually thinking the same thing... when i free-rev it's definitely not as loud as under load
but the test is not to see how loud your m3 is but in comparison which exhaust set ups are louder. So if all tested under the same situations, should give a good idea which setups are louder, no?
__________________
M_BYEEE is offline   United_States
0
Reply With Quote
      01-14-2012, 07:34 PM   #10
AMPowerJ
One mod leads to another ...
 
AMPowerJ's Avatar
 
Drives: 2013 E92 M3
Join Date: Apr 2008
Location: Blythewood, SC

Posts: 2,406
iTrader: (9)

Garage List
huh? what did you say? I can't hear you ...
__________________
2013 E92 M3 with ESS VT2-585 SC, StopTech BBK, ESS Full Exhaust, and a bunch of carbon fiber ... - SOLD
AMPowerJ is offline   United_States
0
Reply With Quote
      01-14-2012, 10:13 PM   #11
Schwaben
Private First Class
 
Schwaben's Avatar
 
Drives: 2012 X5 35D
Join Date: Jan 2011
Location: Germany

Posts: 104
iTrader: (0)

Agreed the test is not perfect, but it gives enough controls to make a decent comparison between systems. You could always test under different conditions and post those results also. For example I drove around with the max metering on and the loudest "in cabin" level I got after about 15 minutes of doing some WOT runs was 105 db.

The 2/3 of rpm at a distance of one meter is just a set of controls. Its not perfect but it should give members a little bit of clarity on a subject that is rather speculative around here.

I would say to feel free to post other results under other conditions, we could even have a decibel contest so to say. loudest exhaust gets one of these --->, sorry I'm cheap....
Schwaben is offline  
0
Reply With Quote
      01-14-2012, 10:14 PM   #12
PhillyNate
BMWCCA #405750
 
PhillyNate's Avatar
 
Drives: 2011 E92 M3 ZCP
Join Date: Apr 2011
Location: Philadelphia

Posts: 1,825
iTrader: (0)

Garage List
2011 BMW E92 M3  [5.00]
Quote:
Originally Posted by 1SICKM View Post
Dont have reader either but my wife can hear me coming a mile away.

Gintani Catless Xpipe
Borla Race rear
My wife says the same with the stock exhaust. Not quite that far though.
__________________

"what I'm driving here...is an ending." Jeremy Clarkson
2011 Alpine White BMW M3 6mt ZCP Coupe
2008 Alpine White BMW 328i 6mt Coupe (retired 06/21/11
)

PhillyNate is offline   United_States
0
Reply With Quote
      01-14-2012, 10:40 PM   #13
MR.Slick1029
Private First Class
 
MR.Slick1029's Avatar
 
Drives: Coming soon
Join Date: Jan 2012
Location: Murray :)

Posts: 126
iTrader: (0)

i donno if the guy is on these forums, But their was an M3 owner in florida that had full straight pipe exhaust headers back. It was just as loud as the funny cars at the track lol.
MR.Slick1029 is offline  
0
Reply With Quote
      01-15-2012, 01:27 AM   #14
1sikbmr
Brigadier General
 
1sikbmr's Avatar
 
Drives: E90 M3 6MT
Join Date: Mar 2010
Location: New York

Posts: 3,153
iTrader: (13)

Quote:
Originally Posted by AMPowerJ View Post
huh? what did you say? I can't hear you ...
LMAO i just did that on a cold start this morning.
__________________

E90 ///M3 6MT Atlantis Blue - Fox red
Gloss black grilles/Red gills|V1 hardwire|Painted reflectors|ZHP lighted shift knob|VMR V710 silver|GTS lip|Lux custom 8k kit|AA Green Filter| AA Pulley| RPI GTM Exhaust|Sosi x-pipe|BMW Performance Steering Wheel V1|
1sikbmr is offline  
0
Reply With Quote
      01-15-2012, 02:22 AM   #15
Dave07997S
Colonel
 
Drives: 2011 BMW M3 ZCP Coupe
Join Date: May 2009
Location: Playa del Rey, CA

Posts: 2,285
iTrader: (1)

Quote:
Originally Posted by SehrSchnell View Post
I don't have a reader, but mine is load as f@ck!

Dinan-X-pipe (middle race exhaust - no cats)

and

Eisenmann Race

"load"..

Drinking tonight are we...
__________________
2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, more to come
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk
Dave07997S is offline  
0
Reply With Quote
      01-15-2012, 02:24 AM   #16
aus
Major General
 
Drives: M3
Join Date: Jul 2005
Location: Seal Beach, CA

Posts: 6,956
iTrader: (5)

You can get a db reading for the iPhone for around a $1 for anyone interested in doing this.
__________________
Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
aus is offline  
0
Reply With Quote
      01-15-2012, 02:53 AM   #17
schnell325
Bored at work....
 
schnell325's Avatar
 
Drives: '08 M3,'11 335xi
Join Date: Aug 2007
Location: BC

Posts: 3,720
iTrader: (5)

^^

Which specific app?
schnell325 is offline   Canada
0
Reply With Quote
      01-15-2012, 03:22 AM   #18
The Database
Prepare to be virtually punished.
 
Drives: 2008 E92 M3
Join Date: Nov 2011
Location: Tampa/ Orlando

Posts: 123
iTrader: (0)

Quote:
Originally Posted by StuttgartM3 View Post
Post your results as follows:

E90 M3
Misterschaft GT2 axle back
Stock X pipe
db @ 5000 rpm: 112.1


O man, if the axle back has 112, I don't to know what my Meisterschaft GT with catless x pipe would read in at. I've had it on for about 2 weeks and it is just stupid loud. Sounds like there is no exhaust at all.
__________________
The Database is offline   United_States
0
Reply With Quote
      01-15-2012, 04:24 AM   #19
kitw
Colonel
 
kitw's Avatar
 
Drives: 2013 C4S cab/2011 E90 M3
Join Date: Jun 2007
Location: Bay Area, CA

Posts: 2,198
iTrader: (14)

Quote:
Originally Posted by amg135i View Post
but the test is not to see how loud your m3 is but in comparison which exhaust set ups are louder. So if all tested under the same situations, should give a good idea which setups are louder, no?
Nah, it's totally different free rev vs load depending the design of the muffler. The delta on the Akrapovic is much more than the Innotech for example. My Eisenmann Sport + Turner Test Pipes was just as loud under load as the Akrapovic but almost 9db quieter on free rev.
kitw is offline  
0
Reply With Quote
      01-15-2012, 11:54 AM   #20
Schwaben
Private First Class
 
Schwaben's Avatar
 
Drives: 2012 X5 35D
Join Date: Jan 2011
Location: Germany

Posts: 104
iTrader: (0)

For what its worth I hit 121.4 db in 3rd at around 7500 in a tunnel going into Austria this morning
Schwaben is offline  
0
Reply With Quote
      01-15-2012, 01:00 PM   #21
Dave07997S
Colonel
 
Drives: 2011 BMW M3 ZCP Coupe
Join Date: May 2009
Location: Playa del Rey, CA

Posts: 2,285
iTrader: (1)

Quote:
Originally Posted by SehrSchnell View Post
I'm always drinking.
LOL
__________________
2013 M3 Coupe-MR/BLK ZCP, ACM test pipes, BPM Stg2 dev. tune and Megan catback, more to come
Previous rides: 2011 M3 Coupe-MR/Blk
2007 Porsche 997C2S Speed Yellow/Blk sport seats
2004 BMW M3 Imola/Blk
Dave07997S is offline  
0
Reply With Quote
      01-16-2012, 03:20 PM   #22
tlr
Second Lieutenant
 
tlr's Avatar
 
Drives: 2011 M3 E93
Join Date: Dec 2010
Location: San Francisco, CA

Posts: 287
iTrader: (0)

Quote:
Originally Posted by E90///M3` View Post
i'd like to get my hands on a decibel meter to test... anyone want to let me borrow one? haha

one of the louder exhaust set-ups i've ever heard out there though:

Mastermind RACE X-Pipe & Arqray Non-JASMA RACE Muffler
I've got one. I'm in SF.
__________________
tlr is offline   United_States
0
Reply With Quote
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 07:21 PM.




m3post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST