berk muffler delete exhaust

redrum36 · 06-11-2011, 06:55 PM

I finally got the exhaust installed. First it sounded great. Then I found that at WOT it has some unpleasant monotoned howl. Any idea what I can do about that?
thanks
d

cooler2442 · 06-11-2011, 07:14 PM

Quote:

Originally Posted by redrum36

I finally got the exhaust installed. First it sounded great. Then I found that at WOT it has some unpleasant monotoned howl. Any idea what I can do about that?
thanks
d

Either give it 700-1k miles for break in and see if its better or get other parts such as downpipes or a different exhaust.

mitch55 · 06-11-2011, 07:17 PM

Quote:

Originally Posted by redrum36

I finally got the exhaust installed. First it sounded great. Then I found that at WOT it has some unpleasant monotoned howl. Any idea what I can do about that?
thanks
d

Infamous "French Horn" ?

redrum36 · 06-11-2011, 08:22 PM

Yeah! French horn! What's that about?

redrum36 · 06-11-2011, 08:53 PM

Quote:

Originally Posted by cooler2442

Either give it 700-1k miles for break in and see if its better or get other parts such as downpipes or a different exhaust.

it was used so no break in is going to help.

will down pipe actually help? i wouldn't think so.

cooler2442 · 06-11-2011, 08:56 PM

Quote:

Originally Posted by redrum36

it was used so no break in is going to help.

will down pipe actually help? i wouldn't think so.

Might change the sound, same with midpipes and etc. Can't know for sure though.

redrum36 · 06-12-2011, 12:26 AM

This is BS and sux!

Top Gon · 06-12-2011, 01:20 AM

My custom muffler delete has the same type of howl. I was thinking it might be due to the split into 2 the 2 tips. I dont think its very smooth so it creates a whistle. I love the sound from 3-5k rpm though

Rodzilla · 06-12-2011, 10:12 AM

Didn't some earlier version of the Berk exhaust have the dreaded "french horn" issue. I think you might have one those earlier models.

dfv2 · 06-13-2011, 09:41 PM

Earlier versions don't have the "balancing tube" installed between the two tips, search for the thread that compares the old and new side by side.

The whole design is just odd and a bit wasteful from an engineering perspective, and the balancing tube (mini H pipe) is the only way to mitigate the horn resonance. They should have just separated single pipe at the tip location, but instead Berk designed a musical instrument!

dfv2 · 06-13-2011, 09:42 PM

found the pic on the following thread:

http://www.1addicts.com/forums/showthread.php?t=435163

SoCali E36 · 06-14-2011, 01:39 AM

Quote:

Originally Posted by redrum36

I finally got the exhaust installed. First it sounded great. Then I found that at WOT it has some unpleasant monotoned howl. Any idea what I can do about that?
thanks
d

i bet it sounds like a rush of air huh?

IGoFast1589 · 10-02-2011, 03:06 PM

What happened with this? Was your issue resolved?

redrum36 · 10-07-2011, 09:41 PM

the french horn is gone but some droning. sounds awesome most of the time. i get a lot of compliments. i had the tube welded in by a local race shop called VFC. They did a great job!

06-11-2011, 06:55 PM	#1
redrum36 135i-DIOT 11 Rep 124 Posts Drives: 2011 135i Join Date: Apr 2011 Location: chicago iTrader: (1)	berk muffler delete exhaust I finally got the exhaust installed. First it sounded great. Then I found that at WOT it has some unpleasant monotoned howl. Any idea what I can do about that? thanks d __________________ 2011 135i -muffler delete, AFE intake, springs, sway, vorslag, Stoptech STR60 david@shark3.com "Faster, Faster, until the thrill of speed overcomes the fear of death."Hunter S. Thompson FS:VISHNU Procede Last edited by redrum36; 06-11-2011 at 07:04 PM..
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06-11-2011, 08:22 PM	#4
redrum36 135i-DIOT 11 Rep 124 Posts Drives: 2011 135i Join Date: Apr 2011 Location: chicago iTrader: (1)	Yeah! French horn! What's that about? __________________ 2011 135i -muffler delete, AFE intake, springs, sway, vorslag, Stoptech STR60 david@shark3.com "Faster, Faster, until the thrill of speed overcomes the fear of death."Hunter S. Thompson FS:VISHNU Procede
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06-12-2011, 12:26 AM	#7
redrum36 135i-DIOT 11 Rep 124 Posts Drives: 2011 135i Join Date: Apr 2011 Location: chicago iTrader: (1)	This is BS and sux! __________________ 2011 135i -muffler delete, AFE intake, springs, sway, vorslag, Stoptech STR60 david@shark3.com "Faster, Faster, until the thrill of speed overcomes the fear of death."Hunter S. Thompson FS:VISHNU Procede
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06-12-2011, 01:20 AM	#8
Top Gon Bashar 416 Rep 1,121 Posts Drives: 2023 BMW Z4 M40i Join Date: Jun 2010 Location: Bay Area, CA iTrader: (4)	My custom muffler delete has the same type of howl. I was thinking it might be due to the split into 2 the 2 tips. I dont think its very smooth so it creates a whistle. I love the sound from 3-5k rpm though
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06-12-2011, 10:12 AM	#9
Rodzilla Lieutenant 31 Rep 409 Posts Drives: 2008 Montego Blue 135i Join Date: Dec 2010 Location: Miami, FL iTrader: (5) Garage List 2008 BMW 135i [0.00]	Didn't some earlier version of the Berk exhaust have the dreaded "french horn" issue. I think you might have one those earlier models. __________________ There are no impossible deeds, only incapable men. Eibach frontsway,BMS JB4,AFE Drop InBerk Street Axleback, H&R SPORT SPRINGS,Active Autowerke DP's ,Active Autowerke BOV,Active Autowerke FMIC , BMWPEDALS.COM, JB SPEED Black Grills,Alpina B3 TCU Flash
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06-13-2011, 09:41 PM	#10
dfv2 Lieutenant 30 Rep 474 Posts Drives: 2009 CTS-V Join Date: Apr 2010 Location: Upstate NY iTrader: (3)	Earlier versions don't have the "balancing tube" installed between the two tips, search for the thread that compares the old and new side by side. The whole design is just odd and a bit wasteful from an engineering perspective, and the balancing tube (mini H pipe) is the only way to mitigate the horn resonance. They should have just separated single pipe at the tip location, but instead Berk designed a musical instrument! __________________ //ecg//
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06-13-2011, 09:42 PM	#11
dfv2 Lieutenant 30 Rep 474 Posts Drives: 2009 CTS-V Join Date: Apr 2010 Location: Upstate NY iTrader: (3)	found the pic on the following thread: http://www.1addicts.com/forums/showthread.php?t=435163 __________________ //ecg//
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10-02-2011, 03:06 PM	#13
IGoFast1589 Captain 49 Rep 654 Posts Drives: 08 135i Join Date: Nov 2010 Location: NY iTrader: (2)	What happened with this? Was your issue resolved?
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10-07-2011, 09:41 PM	#14
redrum36 135i-DIOT 11 Rep 124 Posts Drives: 2011 135i Join Date: Apr 2011 Location: chicago iTrader: (1)	pretty much the french horn is gone but some droning. sounds awesome most of the time. i get a lot of compliments. i had the tube welded in by a local race shop called VFC. They did a great job! __________________ 2011 135i -muffler delete, AFE intake, springs, sway, vorslag, Stoptech STR60 david@shark3.com "Faster, Faster, until the thrill of speed overcomes the fear of death."Hunter S. Thompson FS:VISHNU Procede
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