Help curing exhaust resonance

Tweaky · 07-10-2011, 01:40 PM

I have an evolve automotive rs full exhaust system on my car and it sounds truly awesome, however I am suffering with all I can describe as bad resonance/drone at the 1800 - 2200 rpm range, to such a degree that any long trips result in a dull headache at the end of the journey. I can't be he only one suffering with this, so what have other people done to cure it? I was wondering if extra sound proofing in the boot/ trunk of the car in the form of dynamat might help? If I can just get this problem sorted it will be the ideal exhaust. Or is there some way of tuning the exhaust to cure the resonance?

Thanks for any advice given

Rshane · 07-10-2011, 01:50 PM

You might want to look into intalling a resonator.

Tweaky · 07-10-2011, 02:05 PM

The exhausts do have resonators already for what they are worth

http://evolveautomotive.com/exhausts_954/evolve_958/

Mahmood07 · 07-10-2011, 02:11 PM

you can just change your speed when cruising, a couple MPH above or below what you're driving should fix it maybe.

Singletrack · 07-10-2011, 03:04 PM

I never drive in that range personally, even on very long trips. I don't think you'll find any full exhaust that doesn't have some noise in that range. You really don't have many options because of where things are located on the evolve - which are all the most effective places. There really is no room to add another set of resonators. Honestly, that range is so low, that they probably would not help even if you could get them on.

My advice is to stay above 2200. If that is your only complaint with the exhaust, then you are ahead of the game for sure : )

Tweaky · 07-10-2011, 04:09 PM

I guess it must be peculiar to the m3 as I have had full exhausts with race cats or no cats on my last few cars - supra twin turbo, Audi s4 & rs6 with no hint of drone or resonance. It just seems a shame as it spoils the driving experience a bit.

Tweaky · 07-10-2011, 04:11 PM

I wonder if bmw's own sport exhaust suffers with this problem??

arter · 07-10-2011, 04:25 PM

Some exhausts have the drone and others do not.

the Performance Exhaust is good at avoiding this problem.

Looks for exhausts featuring Helmholtz chambers as these are good at handling drone.

elp_jc · 07-10-2011, 05:54 PM

You need to do a better job choosing an exhaust next time man

. I don't put up with drone anymore; rather stay stock. You need an exhaust system with anti-resonance chambers, like BMW performance, Dinan, Corsa (UUC), and AA. Also keep in mind not all chambers are as effective, since some AA owners still report heavy drone at certain rpm. But they're definintely better than nothing, as the rpm range is greatly diminished. Sell/trade your system and buy one more suited to your needs

. Good luck.

Poppin Fresh · 07-10-2011, 08:31 PM

Does anyone know if the Remus Sport suffer from drone? If so at what range?

UsurbrainM3 · 07-10-2011, 08:38 PM

Innotech with the valve closed.. DOES NOT DRONE... Open.. it does..

Singletrack · 07-10-2011, 09:28 PM

Quote:

Originally Posted by elp_jc

You need to do a better job choosing an exhaust next time man

. I don't put up with drone anymore; rather stay stock. You need an exhaust system with anti-resonance chambers, like BMW performance, Dinan, Corsa (UUC), and AA. Also keep in mind not all chambers are as effective, since some AA owners still report heavy drone at certain rpm. But they're definintely better than nothing, as the rpm range is greatly diminished. Sell/trade your system and buy one more suited to your needs

. Good luck.

He has a full exhaust and it does have resonance chambers and resonators. I severely doubt any of those rear sections will eliminate the drone in that range on a full exhaust.

Tweaky · 07-13-2011, 12:38 PM

Well I have found out what the problem was, one of the back boxes was really close to the heat shield and it must have caused the resonance, a quick reshape and it us much better.

El_Duderino · 07-14-2011, 07:10 PM

Quote:

Originally Posted by Poppin Fresh

Does anyone know if the Remus Sport suffer from drone? If so at what range?

My Remus sport has minimal drone between 1800-2000 rpm. Otherwise, it sounds awesome.

luiscarlos59 · 03-03-2013, 01:40 PM

Hi i just installed the eisenmann race exhaust muffler only and the inside cabin noise is so loud at 2-3k rpms. Anyone has done something to reduce this inside noise?

Poppin Fresh · 03-03-2013, 01:51 PM

I've come to terms with drone and cabin resonance. The key here is to realize when to expect the drone at the known rpm range it creeps out of and simply drive pass it or change gears; in my case, drive it harder.

Tim B. · 03-03-2013, 01:55 PM

Quote:

Originally Posted by Poppin Fresh

I've come to terms with drone and cabin resonance. The key here is to realize when to expect the drone at the known rpm range it creeps out of and simply drive pass it or change gears; in my case, drive it harder.

Exactly!

ms372 · 03-03-2013, 02:05 PM

i though the evolve has electronic valves... so by going into quiet mod you should kill all the drone. one more thing you actually drive the car at 1800-2200 range ?????

llis · 03-03-2013, 03:07 PM

Quote:

Originally Posted by Tweaky

...I am suffering with all I can describe as bad resonance/drone at the 1800 - 2200 rpm range, to such a degree that any long trips result in a dull headache at the end of the journey....

I cannot imagine driving at 1800-2200 rpms. That's practically lugging the engine, isn't it?

Quote:

Originally Posted by luiscarlos59

Hi i just installed the eisenmann race exhaust muffler only and the inside cabin noise is so loud at 2-3k rpms. Anyone has done something to reduce this inside noise?

I have the Eisenmann Race now, and it drones, but for me it's really limited to a range of 2800-3200 RPM, and if I go just a touch over or under that range, it subsides substantially. Unfortunately my habit from my previous car was to cruise a lot in that range. I find I am shifting around so I can avoid cruising in that range. Since it's not my DD, I'm coping fine for now. And the sound otherwise is so marvelous!

Quote:

Originally Posted by arter

...the Performance Exhaust is good at avoiding this problem....

One thing I've noticed is that the M Performance Exhaust (which I had on my previous car and my friend has on her car now) and the OEM stock exhaust exhibit a harmonic resonance in that same range, but the hum is so quiet most people don't even notice it and one can't really call it "drone". In this sense, the MPE is a big winner in my book (and I love the sound at WOT).

crabman · 03-03-2013, 10:17 PM

Yeah, the MPE is a good compromise for those who don't have any tolerance for drone. It's family friendly if you stay out of it but has a wicked wail when you flog it. While is not always the exhaust you want its never the exhaust you don't.

kaiv · 03-03-2013, 11:18 PM

Resonance/drone has to do with the exhaust's design itself. Sound proofing might help reduce what you get into the cabin but IMHO it's only a band-aid solution and will never completely get rid of it. Get a high end setup from people who've been building exhausts for decades and you won't have such issues. No problem with my Supersprint

thegeneral101 · 03-04-2013, 08:11 AM

Quote:

Originally Posted by luiscarlos59

Hi i just installed the eisenmann race exhaust muffler only and the inside cabin noise is so loud at 2-3k rpms. Anyone has done something to reduce this inside noise?

from my experience with Eisenmann Race, its tough to cut the drone. But man that system sounds good haha.

07-10-2011, 01:40 PM	#1
Tweaky New Member Drives: E92 M3 Join Date: Mar 2011 Location: Hampshire Posts: 8 iTrader: (0)	Help curing exhaust resonance I have an evolve automotive rs full exhaust system on my car and it sounds truly awesome, however I am suffering with all I can describe as bad resonance/drone at the 1800 - 2200 rpm range, to such a degree that any long trips result in a dull headache at the end of the journey. I can't be he only one suffering with this, so what have other people done to cure it? I was wondering if extra sound proofing in the boot/ trunk of the car in the form of dynamat might help? If I can just get this problem sorted it will be the ideal exhaust. Or is there some way of tuning the exhaust to cure the resonance? Thanks for any advice given
	Tweet

07-10-2011, 01:50 PM	#2
Rshane M-Flight Member Drives: 2011 E92 M3 Join Date: Jul 2010 Location: Geilenkirchen, Germany Posts: 1,061 iTrader: (0)	You might want to look into intalling a resonator. __________________ 2011 Le Mans Blue M3// Black extended Novillo w/ Blue Grey Aluminum trim/DCT/ZTP/ZCW/ZPP/ZCP Premium Sound ///Akrapovic Evolution Exhaust 2012 Le Mans Blue 135i M Pkg DCT 2008 Brilliant Red Audi TT 3.2 Quattro 6M

07-10-2011, 02:11 PM	#4
Mahmood07 Captain Drives: 2010 E92 M3 DCT Join Date: Sep 2009 Location: Boston / San Diego Posts: 746 iTrader: (0)	you can just change your speed when cruising, a couple MPH above or below what you're driving should fix it maybe. __________________ ///M3 Mods: \| Eisenmann Race Exhaust \| Primary Cats Delete (TTP) \| ESS Tune \| 19" Advan RS \| Eibach Springs \| MS Air Filter \| BMW Perf. Spoiler \| BMW Perf. Splitters \| Euro LCI Tail lights \| Angel iBright v.3.0 \| 20% Tint \| Matte black Kidney Grills \| CF Side Gills \| Painted Reflectors \| Black M3 emblem

07-10-2011, 03:04 PM	#5
Singletrack 4th down; 4th quarter? Renegade. Drives: 09 SSII E92 M3; 12 AW X5d Join Date: Aug 2008 Location: Pittsburgh, PA Posts: 3,800 iTrader: (3)	I never drive in that range personally, even on very long trips. I don't think you'll find any full exhaust that doesn't have some noise in that range. You really don't have many options because of where things are located on the evolve - which are all the most effective places. There really is no room to add another set of resonators. Honestly, that range is so low, that they probably would not help even if you could get them on. My advice is to stay above 2200. If that is your only complaint with the exhaust, then you are ahead of the game for sure : ) __________________ Singletrack's M3 iND/Singletrack's X5d

07-10-2011, 04:25 PM	#8
arter collecting toys Drives: M3 MCB Join Date: May 2008 Location: rochester, ny Posts: 562 iTrader: (0)	Some exhausts have the drone and others do not. the Performance Exhaust is good at avoiding this problem. Looks for exhausts featuring Helmholtz chambers as these are good at handling drone. __________________ 2011 e92 M3 Monte Carlo Blue ESS 535 2010 Honda FIT 2006 SLK 55 AMG

07-10-2011, 02:05 PM	#3
Tweaky New Member Drives: E92 M3 Join Date: Mar 2011 Location: Hampshire Posts: 8 iTrader: (0)	The exhausts do have resonators already for what they are worth http://evolveautomotive.com/exhausts_954/evolve_958/

07-10-2011, 04:09 PM	#6
Tweaky New Member Drives: E92 M3 Join Date: Mar 2011 Location: Hampshire Posts: 8 iTrader: (0)	I guess it must be peculiar to the m3 as I have had full exhausts with race cats or no cats on my last few cars - supra twin turbo, Audi s4 & rs6 with no hint of drone or resonance. It just seems a shame as it spoils the driving experience a bit.

07-10-2011, 04:11 PM	#7
Tweaky New Member Drives: E92 M3 Join Date: Mar 2011 Location: Hampshire Posts: 8 iTrader: (0)	I wonder if bmw's own sport exhaust suffers with this problem??

07-10-2011, 05:54 PM	#9
elp_jc Brigadier General Drives: . Join Date: May 2008 Location: . Posts: 4,912 iTrader: (0)	You need to do a better job choosing an exhaust next time man . I don't put up with drone anymore; rather stay stock. You need an exhaust system with anti-resonance chambers, like BMW performance, Dinan, Corsa (UUC), and AA. Also keep in mind not all chambers are as effective, since some AA owners still report heavy drone at certain rpm. But they're definintely better than nothing, as the rpm range is greatly diminished. Sell/trade your system and buy one more suited to your needs . Good luck.

07-10-2011, 08:31 PM	#10
Poppin Fresh Colonel Drives: With a sunroof and front plate Join Date: May 2009 Location: Bergen County NJ Posts: 2,043 iTrader: (0)	Does anyone know if the Remus Sport suffer from drone? If so at what range? __________________

07-10-2011, 08:38 PM	#11
UsurbrainM3 Private First Class Drives: 2008 e90 M3 Join Date: Jan 2011 Location: CA Posts: 131 iTrader: (0)	Innotech with the valve closed.. DOES NOT DRONE... Open.. it does..

07-13-2011, 12:38 PM	#13
Tweaky New Member Drives: E92 M3 Join Date: Mar 2011 Location: Hampshire Posts: 8 iTrader: (0)	Well I have found out what the problem was, one of the back boxes was really close to the heat shield and it must have caused the resonance, a quick reshape and it us much better.

03-03-2013, 01:40 PM	#15
luiscarlos59 Private Drives: M3 Join Date: Nov 2012 Location: Texas Posts: 62 iTrader: (0)	Hi i just installed the eisenmann race exhaust muffler only and the inside cabin noise is so loud at 2-3k rpms. Anyone has done something to reduce this inside noise?

03-03-2013, 01:51 PM	#16
Poppin Fresh Colonel Drives: With a sunroof and front plate Join Date: May 2009 Location: Bergen County NJ Posts: 2,043 iTrader: (0)	I've come to terms with drone and cabin resonance. The key here is to realize when to expect the drone at the known rpm range it creeps out of and simply drive pass it or change gears; in my case, drive it harder. __________________

03-03-2013, 02:05 PM	#18
ms372 Captain Drives: AW E92 m3 6MT Join Date: Mar 2012 Location: Montreal Posts: 683 iTrader: (0)	i though the evolve has electronic valves... so by going into quiet mod you should kill all the drone. one more thing you actually drive the car at 1800-2200 range ????? __________________ ESS Tune \| Challenge sport x-pipe \| Meisterschaft GT2 (FOR SALE!) \| Dinan Intake \| Evosport pulley\| Vorsteiner \| Platte Forme A.G. \|Gintani \| UUC \| BMW Performance \| Macht Schnell GT2 Muffler (http://www.m3post.com/forums/showthread.php?t=829307)

03-03-2013, 10:17 PM	#20
crabman Captain Drives: M3 Join Date: Dec 2011 Location: WA Posts: 650 iTrader: (0)	Yeah, the MPE is a good compromise for those who don't have any tolerance for drone. It's family friendly if you stay out of it but has a wicked wail when you flog it. While is not always the exhaust you want its never the exhaust you don't. __________________ 2012 E92 Space Grey with fox red/black/black, comp, premium, DCT, premium sound, sirius, heated seats.

03-03-2013, 11:18 PM	#21
kaiv Major Drives: E92 M3 Join Date: Mar 2010 Location: San Diego, CA Posts: 1,117 iTrader: (12)	Resonance/drone has to do with the exhaust's design itself. Sound proofing might help reduce what you get into the cabin but IMHO it's only a band-aid solution and will never completely get rid of it. Get a high end setup from people who've been building exhausts for decades and you won't have such issues. No problem with my Supersprint

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