How loud is stock exhaust in decibels?

booforty · 07-15-2008, 05:26 AM

Anyone know how loud the stock exhaust is in decibels? Is it less than 100db?

Thanks!

BRDHNTR · 07-15-2008, 08:04 AM

Definately under 100, probably around 75dbl.

Nate@IND · 07-15-2008, 08:07 AM

OEM Specs

moving vehicle = apr. 75 db
stationary vehicle = 92 db at 6.225 1/min
value of backpressure = 0,47 bar at 2. gear and 0,51 bar at 3. gear
weight of the muffler = apr. 21 kg

booforty · 07-15-2008, 08:56 AM

You guys are brilliant! I knew someone would know the answer. I love this forum...

BRDHNTR · 07-15-2008, 10:32 AM

Nice Nate, I knew that I have seen your post somewhere else. I just wasn't positive.

kyoshozx · 07-15-2008, 12:34 PM

So it's the same as the Eisenmann sport?

http://www.m3post.com/forums/showthread.php?t=114331

Nate@IND · 07-15-2008, 12:47 PM

Quote:

Originally Posted by kyoshozx

So it's the same as the Eisenmann sport?

http://www.m3post.com/forums/showthread.php?t=114331

The Eisenmann Sport performance is street legal in Europe and North America. It offers the same db level as stock but with a much deeper throaty tone.

Sport performance video

booforty · 07-16-2008, 04:25 AM

Top vids!

MDCTFTW · 07-16-2008, 04:27 AM

So is the Eis. race legal in N. America and Europe?

2FED · 07-17-2008, 10:24 PM

Quote:

Originally Posted by MDCTFTW

So is the Eis. race legal in N. America and Europe?

+1
?? is Race is legal ??

Kadarin · 07-17-2008, 11:03 PM

And what is the db rating on the race?

2FED · 07-17-2008, 11:06 PM

Quote:

Originally Posted by Kadarin

And what is the db rating on the race?

SPORT-Version:

moving vehicle = 75 db
stationary vehicle = 92 db at 6.225 1/min
value of backpressure = -25%
weight of the muffler = apr. 21 kg

RACE-Version:

moving vehicle = apr. 95 db
stationary vehicle = apr. 102 db at 6.225 1/min
value of backpressure = apr. -32%
weight of the muffler = apr. 21 kg

Ilia@IND · 07-18-2008, 11:50 AM

Quote:

Originally Posted by 2FED

+1
?? is Race is legal ??

The Race system is not TUV approved for road use in Germany.

The Sport system is TUV approved and road legal in Germany as well as US.

07-15-2008, 05:26 AM	#1
booforty Major General Drives: E92 M3 Join Date: Mar 2005 Location: London, UK Posts: 8,813 iTrader: (0) Garage List 2008 E92 M3 [0.00]	How loud is stock exhaust in decibels? Anyone know how loud the stock exhaust is in decibels? Is it less than 100db? Thanks!
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07-15-2008, 08:04 AM	#2
BRDHNTR Ground Pilot Drives: e92 BMW M3 Join Date: May 2008 Location: Waverly, PA Posts: 549 iTrader: (0) Garage List 2002 M3 [0.00] 2008 e92 M3 [0.00]	Definately under 100, probably around 75dbl. __________________ "The laws of physics cannot be repealed, even with DSC." - BMW Owner's Manual
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07-15-2008, 08:07 AM	#3
Nate@IND BimmerPost Supporting Vendor Drives: BMW Join Date: Oct 2006 Location: Chicago Posts: 10,114 iTrader: (19)	OEM Specs moving vehicle = apr. 75 db stationary vehicle = 92 db at 6.225 1/min value of backpressure = 0,47 bar at 2. gear and 0,51 bar at 3. gear weight of the muffler = apr. 21 kg __________________ IND DISTRIBUTION \| 866.963.4520 \| IND Blog \| IND Facebook
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07-15-2008, 10:32 AM	#5
BRDHNTR Ground Pilot Drives: e92 BMW M3 Join Date: May 2008 Location: Waverly, PA Posts: 549 iTrader: (0) Garage List 2002 M3 [0.00] 2008 e92 M3 [0.00]	Nice Nate, I knew that I have seen your post somewhere else. I just wasn't positive. __________________ "The laws of physics cannot be repealed, even with DSC." - BMW Owner's Manual
	0

07-15-2008, 12:34 PM	#6
kyoshozx Private First Class Drives: M3 Join Date: Mar 2008 Location: NYC Posts: 184 iTrader: (1)	So it's the same as the Eisenmann sport? http://www.m3post.com/forums/showthread.php?t=114331 __________________
	0

07-15-2008, 08:56 AM	#4
booforty Major General Drives: E92 M3 Join Date: Mar 2005 Location: London, UK Posts: 8,813 iTrader: (0) Garage List 2008 E92 M3 [0.00]	You guys are brilliant! I knew someone would know the answer. I love this forum...
	0

07-16-2008, 04:25 AM	#8
booforty Major General Drives: E92 M3 Join Date: Mar 2005 Location: London, UK Posts: 8,813 iTrader: (0) Garage List 2008 E92 M3 [0.00]	Top vids!
	0

07-16-2008, 04:27 AM	#9
MDCTFTW Lieutenant Colonel Drives: E92 DCT Join Date: Apr 2008 Location: Norcal Posts: 1,974 iTrader: (0)	So is the Eis. race legal in N. America and Europe? __________________ MDCT ... so you can drive and eat a hamburger at the same time.
	0

07-17-2008, 11:03 PM	#11
Kadarin Ambassador of Crunk Drives: SG/blk '08 E92 M3 Join Date: Apr 2008 Location: San Jose, CA Posts: 606 iTrader: (0)	And what is the db rating on the race?
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