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
 
Strasse Wheels
Post Reply
 
Thread Tools Search this Thread
      01-21-2012, 05:02 PM   #1
12'M3Freak
Private First Class
12'M3Freak's Avatar
5
Rep
135
Posts

 
Drives: M3
Join Date: May 2009
Location: U.S.

iTrader: (0)

Performance Exhaust

How much more horsepower does the BMW performance exhaust really add? I see some other exhaust can add up to 14 hp and are a little bit cheaper.
Appreciate 0
      01-21-2012, 05:33 PM   #2
CanAutM3
Brigadier General
CanAutM3's Avatar
Canada
67
Rep
4,328
Posts

 
Drives: 2015 M4 DCT
Join Date: Jan 2012
Location: Montreal

iTrader: (0)

Garage List
2015 BMW M4  [4.75]
2006 Audi S4  [0.00]
BMW does not advertise any performance gains. However, I saw two videos on You-Tube that quote +2hp and +7hp. Both are not significant increases but at least there are no losses.

I've had my performance exhaust installed for about a week now. My very inaccurate seat-of-the-pants feels a very slight increased eagerness in the engine mid-range. This seems to corroborate the dyno graphs that show more of an increase in the mid-range. However, my butt-dyno might be thrown off due to the great sound .


www.youtube.com/watch?v=H0hI_2Gi5ms

www.youtube.com/watch?v=nX_PGJr18Ac

Last edited by CanAutM3; 01-21-2012 at 06:48 PM.
Appreciate 0
      01-21-2012, 08:42 PM   #3
12'M3Freak
Private First Class
12'M3Freak's Avatar
5
Rep
135
Posts

 
Drives: M3
Join Date: May 2009
Location: U.S.

iTrader: (0)

Quote:
Originally Posted by CanAutM3 View Post
BMW does not advertise any performance gains. However, I saw two videos on You-Tube that quote +2hp and +7hp. Both are not significant increases but at least there are no losses.

I've had my performance exhaust installed for about a week now. My very inaccurate seat-of-the-pants feels a very slight increased eagerness in the engine mid-range. This seems to corroborate the dyno graphs that show more of an increase in the mid-range. However, my butt-dyno might be thrown off due to the great sound .


www.youtube.com/watch?v=H0hI_2Gi5ms

www.youtube.com/watch?v=nX_PGJr18Ac

Hahaha "butt-dyno" that is awesome. Thanks for the info.
Appreciate 0
      01-21-2012, 08:53 PM   #4
pbonsalb
Lieutenant Colonel
21
Rep
1,778
Posts

 
Drives: 08 E90 M3, 99 E36 M3 Turbo
Join Date: Feb 2011
Location: Concord, NH

iTrader: (3)

BMW claims only a "more powerful sound." Akra, which makes a very nice and expensive titanium exhaust, claims 3 rwhp. If you want more power, you need to remove one or both cats from the x-pipe by modifying your x-pipe or buying an aftermarket one already configured as you desire (resonators, high flow cats, neither, etc).
Appreciate 0
      01-21-2012, 08:56 PM   #5
Moxie
Lieutenant Colonel
Moxie's Avatar
Germany
25
Rep
1,860
Posts

 
Drives: AW 328d Touring/SG 335d
Join Date: Jul 2009
Location: Stuttgart

iTrader: (11)

I found this claim here http://gtbperformance.gostorego.com/...m3-4x83mm.html


The Eisenmann Race performance offers a deep throaty exotic tone. This dyno proven system put down 16hp, and 11lb-ft of torque and is handmade in Germany.


Appreciate 0
      01-22-2012, 09:10 PM   #6
THE TECH
BimmerPost Supporting Vendor
THE TECH's Avatar
United_States
157
Rep
13,122
Posts


 
Drives: BPMsport 2012 E92 M3
Join Date: Jun 2011
Location: Kansas

iTrader: (45)

Garage List
Send a message via AIM to THE TECH Send a message via Skype™ to THE TECH
No slip-on adds power.
__________________
Appreciate 0
      01-23-2012, 01:35 PM   #7
CanAutM3
Brigadier General
CanAutM3's Avatar
Canada
67
Rep
4,328
Posts

 
Drives: 2015 M4 DCT
Join Date: Jan 2012
Location: Montreal

iTrader: (0)

Garage List
2015 BMW M4  [4.75]
2006 Audi S4  [0.00]
Quote:
Originally Posted by THE TECH View Post
No slip-on adds power.
Don't you think your statement is a bit too "absolute" ?

I'd rather say:

Most slip-ons do not add a significant amount of power.
Appreciate 0
      01-23-2012, 02:00 PM   #8
Nate@IND
BimmerPost Supporting Vendor
Nate@IND's Avatar
479
Rep
10,441
Posts


 
Drives: BMW
Join Date: Oct 2006
Location: Chicago

iTrader: (19)

Quote:
Originally Posted by Moxie View Post
I found this claim here http://gtbperformance.gostorego.com/...m3-4x83mm.html


The Eisenmann Race performance offers a deep throaty exotic tone. This dyno proven system put down 16hp, and 11lb-ft of torque and is handmade in Germany.


Quote:
Originally Posted by THE TECH View Post
No slip-on adds power.
You should have seen the guys face at Fall-line when the Eisenmann Race put down that power run after run The M3 used was 100% stock and not owned by IND.

Ambient Temperature: 72 degrees Fahrenheit
Barometric Pressure: 29.1 inHG
Relative Humidity: 22%
Correction Factor: 1.008%

http://www.m3post.com/forums/showthr...Eisenmann+dyno
__________________
Appreciate 0
      01-23-2012, 05:06 PM   #9
Denk
Lieutenant Colonel
United_States
23
Rep
1,960
Posts

 
Drives: E92 M3 ZCP
Join Date: May 2011
Location: PNW

iTrader: (2)

When I had my Eisenmann Race on, the car felt like it had a little extra kick...I blew it off as just sounding faster.
Appreciate 0
      01-25-2012, 11:22 AM   #10
ModBargains.com
Banned
United_States
316
Rep
13,593
Posts

 
Drives: JB E92 335i
Join Date: Feb 2008
Location: 1721 E. Lambert Rd #C, La Habra, CA 90631

iTrader: (51)

The BMW Performance exhaust if roughly 20 lbs lighter than the stock counterpart. They don't advertise any power gains with the system, but it definitely does sound great. There are plenty of other systems out that are only only more affordable, but will also perform better. If you're looking for a system that sounds great, is light weight (Full system only weighs 33.8 lbs. Over 22 lbs lighter the OE system), is affordable, and has dyno proven gains (+18 HP / +13 TQ), I would recommend that you check out the AE Performance Exhaust system. Here's a sound clip for you to check out this great sounding exhaust in action!

Appreciate 0
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 05:39 AM.




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