Berk Muffler Delete Axle-Back (with balancer tube)

Amalfitano · 09-23-2010, 11:13 AM

I picked up the Berk axle-back a little while back, and was one of the unfortunate to experience the "Horn" noise. Berk worked on and developed a version with a balancer tube targeting the horn noise as a resonance issue.

The Final version? A perfect sounding exhaust note, deep and aggressive across the RPM band with minimal if any true drone at highway speeds. I'd say that actually 2k is about the closest to a drone but really it is nothing that I would call an issue at all. I know some of you are wary of drone and perhaps its all in the eye of the beholder, but there is nothing about the 2k noise that I would call excessive. Plus just a nudge past 2k and it settles in nicely, and most of us live in the 2.3 to 2.7 range on the highway...

No I did not before and after dyno, and i'm not going to. I autocross, and felt the system deliver my power smoother after install. There has been no drop-off felt between the "horn" version and this version with the balancer tube.

(sound clips should be coming, I don't have a video camera)

CMSS2000 · 09-23-2010, 11:47 AM

How about a pic....I'd like to see what this balancer tube looks like....is it similar to AA or aFe exhaust?

Amalfitano · 09-24-2010, 02:18 PM

Only have this bad camera phone pic for now. I didn't realize how bad it was before i was no longer in a position to take a good pic. The tips are exactly the same as the standard axle-back, the balancer tube is upstream enough to not be visible unless you're underneath the car.

CMSS2000 · 09-24-2010, 04:52 PM

Quote:

Originally Posted by Amalfitano

Only have this bad camera phone pic for now. I didn't realize how bad it was before i was no longer in a position to take a good pic. The tips are exactly the same as the standard axle-back, the balancer tube is upstream enough to not be visible unless you're underneath the car.

Hmmm. From the pic it looks like it is some sort of cushioning device. Does it rest against the frame or some other place. Do you know the principle behind it?

ES BMW · 09-24-2010, 05:00 PM

It's not the dark vibration dampener. On the right side exhaust, it's in-between the two top plates.

See below...

CMSS2000 · 09-24-2010, 06:31 PM

Oh, missed that completely. And it pretty much elminates the drone eh?

bryce · 09-24-2010, 07:50 PM

Quote:

Originally Posted by CMSS2000

Oh, missed that completely. And it pretty much elminates the drone eh?

more like eliminates the french horn effect on some berk muffler deletes. search youtube, it's kinda hilarious

BerkTechnology · 09-25-2010, 01:39 AM

Quote:

Originally Posted by My E90

It's not the dark vibration dampener. On the right side exhaust, it's in-between the two top plates.

See below...

That is correct.

ORIGIN M. · 09-25-2010, 01:48 AM

Bump for a sound bite.

Amalfitano · 09-27-2010, 09:53 AM

It was originally my plan to get the sound bite yesterday at our season finale, but i got too wrapped up in the cones I kept hitting to get my friend to record it, we have two events this weekend though, so I shouldn't be able to forget for both days...

IGoFast1589 · 10-02-2011, 03:06 PM

Has this been an issue with the axel back's that have mufflers as well?

Elsabor67 · 10-03-2011, 01:30 PM

No, at least no in my case and I have a Berk Tech. Street Perf. Exhaust

pi2 · 10-06-2011, 01:52 AM

Quote:

Originally Posted by BerkTechnology

That is correct.

Ok,do you plan on doing something for those costumers who have this "hilarious" french horn sound?

|2ed · 10-06-2011, 06:31 AM

Great ordering mine today....

IGoFast1589 · 10-06-2011, 07:28 AM

Quote:

Originally Posted by pi2

Ok,do you plan on doing something for those costumers who have this "hilarious" french horn sound?

I am in discussion with a guy at Berk now. He has been really helpful. I think I may have figured out why mine is making a funny noise, but if I can't resolve it on my own this weekend Berk is going to help me out.

From what I understand, this only applies to old designs. I think may noise is something different.

Will keep everyone posted, but Berk has been nothing but good to me so far.

John Dempsey · 10-06-2011, 09:23 AM

I have a berk race and it sounds great

09-23-2010, 11:13 AM	#1
Amalfitano Second Lieutenant 15 Rep 269 Posts Drives: 2009 135i STEP, Future //M2012 Join Date: Jan 2010 Location: Chicago iTrader: (1) Garage List 2009 135i [0.00]	Berk Muffler Delete Axle-Back (with balancer tube) I picked up the Berk axle-back a little while back, and was one of the unfortunate to experience the "Horn" noise. Berk worked on and developed a version with a balancer tube targeting the horn noise as a resonance issue. The Final version? A perfect sounding exhaust note, deep and aggressive across the RPM band with minimal if any true drone at highway speeds. I'd say that actually 2k is about the closest to a drone but really it is nothing that I would call an issue at all. I know some of you are wary of drone and perhaps its all in the eye of the beholder, but there is nothing about the 2k noise that I would call excessive. Plus just a nudge past 2k and it settles in nicely, and most of us live in the 2.3 to 2.7 range on the highway... No I did not before and after dyno, and i'm not going to. I autocross, and felt the system deliver my power smoother after install. There has been no drop-off felt between the "horn" version and this version with the balancer tube. (sound clips should be coming, I don't have a video camera)
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09-23-2010, 11:47 AM	#2
CMSS2000 Private First Class 5 Rep 135 Posts Drives: 2011 135i DCT Join Date: Aug 2010 Location: NE PA iTrader: (0)	How about a pic....I'd like to see what this balancer tube looks like....is it similar to AA or aFe exhaust?
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09-24-2010, 02:18 PM	#3
Amalfitano Second Lieutenant 15 Rep 269 Posts Drives: 2009 135i STEP, Future //M2012 Join Date: Jan 2010 Location: Chicago iTrader: (1) Garage List 2009 135i [0.00]	Only have this bad camera phone pic for now. I didn't realize how bad it was before i was no longer in a position to take a good pic. The tips are exactly the same as the standard axle-back, the balancer tube is upstream enough to not be visible unless you're underneath the car. Attached Images
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09-24-2010, 05:00 PM	#5
ES BMW Captain 68 Rep 883 Posts Drives: '12 E92 M3 ZCP 6MT Join Date: May 2007 Location: South Florida iTrader: (3)	It's not the dark vibration dampener. On the right side exhaust, it's in-between the two top plates. See below... Attached Images __________________ '12 E92 M3 \| 6MT \| ZCP
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09-24-2010, 06:31 PM	#6
CMSS2000 Private First Class 5 Rep 135 Posts Drives: 2011 135i DCT Join Date: Aug 2010 Location: NE PA iTrader: (0)	Oh, missed that completely. And it pretty much elminates the drone eh?
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09-25-2010, 01:48 AM	#9
ORIGIN M. Banned 3160 Rep 9,134 Posts Drives: ///M Join Date: Oct 2007 Location: Northern Hemisphere iTrader: (0)	Bump for a sound bite.
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09-27-2010, 09:53 AM	#10
Amalfitano Second Lieutenant 15 Rep 269 Posts Drives: 2009 135i STEP, Future //M2012 Join Date: Jan 2010 Location: Chicago iTrader: (1) Garage List 2009 135i [0.00]	It was originally my plan to get the sound bite yesterday at our season finale, but i got too wrapped up in the cones I kept hitting to get my friend to record it, we have two events this weekend though, so I shouldn't be able to forget for both days...
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10-02-2011, 03:06 PM	#11
IGoFast1589 Captain 49 Rep 654 Posts Drives: 08 135i Join Date: Nov 2010 Location: NY iTrader: (2)	Has this been an issue with the axel back's that have mufflers as well?
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10-03-2011, 01:30 PM	#12
Elsabor67 aiming for 450..... 303 Rep 2,910 Posts Drives: Totaled :-( Join Date: Feb 2009 Location: Louisiana iTrader: (28) Garage List 2009 135i [10.00]	No, at least no in my case and I have a Berk Tech. Street Perf. Exhaust __________________ Quote from Ezeedee regarding car mods: "you're only done when you sell the car "
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10-06-2011, 06:31 AM	#14
\|2ed Private First Class 24 Rep 109 Posts Drives: 135i N55 Join Date: Nov 2010 Location: SG iTrader: (0)	Great ordering mine today....
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10-06-2011, 09:23 AM	#16
John Dempsey Banned 31 Rep 588 Posts Drives: White 135i M-Sport Join Date: Sep 2011 Location: Encinitas iTrader: (0)	I have a berk race and it sounds great
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