Performance Exhaust

12'M3Freak · 01-21-2012, 05:02 PM

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.

CanAutM3 · 01-21-2012, 05:33 PM

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

12'M3Freak · 01-21-2012, 08:42 PM

Quote:

Originally Posted by CanAutM3

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.

pbonsalb · 01-21-2012, 08:53 PM

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).

Moxie · 01-21-2012, 08:56 PM

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.

THE TECH · 01-22-2012, 09:10 PM

No slip-on adds power.

CanAutM3 · 01-23-2012, 01:35 PM

Quote:

Originally Posted by THE TECH

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.

Nate@IND · 01-23-2012, 02:00 PM

Quote:

Originally Posted by Moxie

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

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

Denk · 01-23-2012, 05:06 PM

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.

ModBargains.com · 01-25-2012, 11:22 AM

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!

01-21-2012, 05:02 PM	#1
12'M3Freak Private First Class Drives: M3 Join Date: May 2009 Location: U.S. Posts: 135 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.
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01-21-2012, 05:33 PM	#2
CanAutM3 Colonel Drives: 2008 E92 M3 SS2 DCT Join Date: Jan 2012 Location: Montreal Posts: 2,369 iTrader: (0) Garage List 2008 BMW M3 [0.00] 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.
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01-21-2012, 08:53 PM	#4
pbonsalb Major Drives: 08 E90 M3, 99 E36 M3 Turbo Join Date: Feb 2011 Location: Concord, NH Posts: 1,417 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).
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01-21-2012, 08:56 PM	#5
Moxie Lieutenant Colonel Drives: AW 328d Touring/SG 335d Join Date: Jul 2009 Location: Stuttgart Posts: 1,844 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.
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01-22-2012, 09:10 PM	#6
THE TECH BimmerPost Supporting Vendor Drives: BPMsport 2012 E92 M3 Join Date: Jun 2011 Location: Kansas Posts: 12,524 iTrader: (39) Garage List 2014 Honda Grom [0.00] 2012 Honda Ruckus [0.00] 2005 Chevy Silverad ... [0.00] 1995 Toyota Supra [0.00] 2012 BMW E92 M3 [0.00]	No slip-on adds power.
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01-23-2012, 05:06 PM	#9
Denk Lieutenant Colonel Drives: E92 M3 ZCP Join Date: May 2011 Location: PNW Posts: 1,601 iTrader: (1)	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.
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01-25-2012, 11:22 AM	#10
ModBargains.com Banned Drives: JB E92 335i Join Date: Feb 2008 Location: 1721 E. Lambert Rd #C, La Habra, CA 90631 Posts: 13,594 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!
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