Help! My exhaust is making my ears bleed!

zeeth2800 · 03-13-2015, 04:44 PM

Hey everyone!
Yesterday I made a childish mistake and straight piped my E82. After looking at what others had done with a race catback I figured that the sound would be reasonable.
I am currently running:
VRSF 3" downpipes
N55 midpipe (N54 with the cats cut out)
3" custom catback (similar to berk race)

The car isn't that loud if you're not on it but as soon as you hit the gas it is just insane between the 1200rpm and 2100rpm range.
On decel it sounds as if a whoopy cushion is deflating at around the same RPM range as stated above.

Any suggestions on what setup might give my a slightly quieter tone?

I will say that this exhaust setup has given the car a substantial kick in the pants. It absolutely flys now.

livnpaintball2 · 03-13-2015, 05:54 PM

Magnaflow mufflers do a good job on dropping the db and still sound good.

e36addict · 03-13-2015, 07:50 PM

I agree with the magnaflow comment. That or weld in a couple resonators before the N55 resonator. Or both..

edisapimp · 03-14-2015, 10:55 AM

Quote:

Originally Posted by zeeth2800

On decel it sounds as if a whoopy cushion is deflating at around the same RPM range as stated above.

I lol'ed!

I third the idea of magnaflow. Inexpensive and easy to source, should decrease the volume. I'm sorry that you don't like it ;[

Hopefully it gets better! Keep us posted.

lowbudgethero · 03-14-2015, 12:17 PM

You have a complete straight exhaust setup, that's got to be loud as hell you're experiencing extreme droning. I'd just put the stock rear muffler on unless it's a different diameter than stock, with N55 mids and no cats it should be nice but not too crazy loud. Otherwise any straight though resonator should work.

mike@x-ph.com · 03-14-2015, 01:00 PM

Active Autowerke Gen I

Grinchxvx · 03-14-2015, 02:17 PM

Wanna upload a clip of it? I'm about to get n55 mids and will have the Same setup

Bowwdown · 03-14-2015, 09:18 PM

I have the factory downpipe, it had PE catback exhaust on it and just today I unbolted the axleback section and built a section with no muffler to dual tips. Sounds great, same type of sound my SRT4 had. I will drive it for a week or so and see if I still love it

loesch · 03-14-2015, 10:50 PM

Quote:

Originally Posted by mike@x-ph.com

Active Autowerke Gen I

You mean Gen II? The one with the muffler.

Cavpilot2k · 03-15-2015, 01:11 AM

Um...straight unrestricted exhaust and you're surprised that its stupid loud?
I'm surprised that you're surprised.

mike@x-ph.com · 03-15-2015, 03:52 AM

Quote:

Originally Posted by loesch

You mean Gen II? The one with the muffler.

I think Gen II will be a lot quieter than what OP has currently.
He asked for a bit quieter which makes me think Gen I would be a better option .

Marc08EX · 03-15-2015, 06:59 AM

From my research and reading on the forums, you need to put a resonator if you install an aftermarket DP if you don't want it ear-bleeding loud.

I have an Active Autowerke Gen I exhaust without a resonator so it's pretty much a straight pipe setup. But I'm on stock DPs as well. It is LOUD but not obnoxious and I love it. I wouldn't even consider having this if I decide to put catless DPs. LOL!

Quote:

Originally Posted by Cavpilot2k

Um...straight unrestricted exhaust and you're surprised that its stupid loud?
I'm surprised that you're surprised.

Ultimateone · 03-15-2015, 09:44 AM

Quote:

Originally Posted by mike@x-ph.com

I think Gen II will be a lot quieter than what OP has currently.
He asked for a bit quieter which makes me think Gen I would be a better option .

Gen 1 would still be too loud IMO

Acheron83 · 03-16-2015, 04:36 AM

Get some resonators on those mids.

zeeth2800 · 03-16-2015, 04:08 PM

Thanks for the suggestions. If it didn't have that buzz under 2000rpm I would keep it. Almost sounds like an exhaust leak till 2100rpm. It is a shame.

zeeth2800 · 03-16-2015, 04:10 PM

video/sound clip will be posted tonight from my iPotato 6

stuggy · 03-16-2015, 09:32 PM

I know that buzzing/rasp your describing. I had catless downpipes, catless and non-resonated Midpipes with stock axle back. It rasp'd bad accelerating between 1500-2200. I think if you add some resonators in the Midpipes, like others are suggesting, it should help.

03-13-2015, 04:44 PM	#1
zeeth2800 Private First Class 37 Rep 183 Posts Drives: 08 135i, 89 M3 Join Date: Oct 2013 Location: Corvallis, OR iTrader: (0)	Help! My exhaust is making my ears bleed! Hey everyone! Yesterday I made a childish mistake and straight piped my E82. After looking at what others had done with a race catback I figured that the sound would be reasonable. I am currently running: VRSF 3" downpipes N55 midpipe (N54 with the cats cut out) 3" custom catback (similar to berk race) The car isn't that loud if you're not on it but as soon as you hit the gas it is just insane between the 1200rpm and 2100rpm range. On decel it sounds as if a whoopy cushion is deflating at around the same RPM range as stated above. Any suggestions on what setup might give my a slightly quieter tone? I will say that this exhaust setup has given the car a substantial kick in the pants. It absolutely flys now. __________________ 2008 135i SGM 6-Speed l AD Engineering ST 6262BB l MHD Tuned l MAXBoost/N20 Map l GFB electronic boost controller l Spec 2+ l Walbro 450 LPFP l VRSF 7" FMIC l VRSF CP l Tial BOV l BMR 3.5" Exhaust l BMS Catch Can l RB pcv l
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03-13-2015, 05:54 PM	#2
livnpaintball2 Second Lieutenant 34 Rep 260 Posts Drives: E82 N54 Join Date: Mar 2013 Location: Dfw iTrader: (0)	Magnaflow mufflers do a good job on dropping the db and still sound good. __________________ 08 135 SB DCI, VRSF 7" fmic, VRSF DP, Berk street, Wavetrac!, Koni yellows, eibach sways, M3 lca, Dinan plates, poly bushings, JB4 iso5, E85, Alpina flash/m3 paddles, CP, walbro, and other crap. VVT Stg1
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03-13-2015, 07:50 PM	#3
e36addict Captain 137 Rep 952 Posts Drives: 2013 X1 35iX Join Date: Jul 2013 Location: Tim @ BMW of Dallas iTrader: (5)	I agree with the magnaflow comment. That or weld in a couple resonators before the N55 resonator. Or both.. __________________ 13 X1 35iX, 98 Z3 2.8, 01 M Coupe, 96 Z3 1.9 DASC, 95 318ti, 13 smart fortwo
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03-14-2015, 12:17 PM	#5
lowbudgethero Captain 125 Rep 750 Posts Drives: '98 Z3M (gone), '09 135i Join Date: Feb 2013 Location: 908 iTrader: (0) Garage List 2009 BMW 135i [8.50]	You have a complete straight exhaust setup, that's got to be loud as hell you're experiencing extreme droning. I'd just put the stock rear muffler on unless it's a different diameter than stock, with N55 mids and no cats it should be nice but not too crazy loud. Otherwise any straight though resonator should work.
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03-14-2015, 01:00 PM	#6
mike@x-ph.com Joint Chiefs of Staff 24029 Rep 190,524 Posts Drives: 07-335/12-328/18-M4/21-M4CP Join Date: Sep 2013 Location: Las Vegas iTrader: (23)	Active Autowerke Gen I __________________ Check out our current sale by clicking on this link! https://x-ph.com/sale/ Phone number 702-494-9435
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03-14-2015, 02:17 PM	#7
Grinchxvx Lieutenant 29 Rep 414 Posts Drives: 2008 135i Join Date: Apr 2014 Location: Salt Lake City iTrader: (0)	Wanna upload a clip of it? I'm about to get n55 mids and will have the Same setup __________________ 2008 Aw/Coral Red Manual 135i Coupe- JB4 G5 + BMS race flash, BMS meth kit, VRSF DP, Big tom Ic, BMS chinese tester CP, Custom Muffler Delete, BMS Oil Cooler Valve, Cowl Filters, Clutch Stop, B&M Short Shifter, Spec Stg 2+ Clutch W/ Oem dmfw, Vmr V710, KW v2, M RSFB, 1M Front and rear Bumper, Performance Side Skirts, slek trunk, Lci blacklines.]
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03-14-2015, 09:18 PM	#8
Bowwdown Enlisted Member 0 Rep 35 Posts Drives: 2011 135i msport Join Date: May 2013 Location: Toronto iTrader: (0)	I have the factory downpipe, it had PE catback exhaust on it and just today I unbolted the axleback section and built a section with no muffler to dual tips. Sounds great, same type of sound my SRT4 had. I will drive it for a week or so and see if I still love it
	Appreciate 0 Quote

03-15-2015, 01:11 AM	#10
Cavpilot2k Chief Warrant Officer 1023 Rep 1,638 Posts Drives: like a damn lunatic Join Date: Feb 2012 Location: Boston iTrader: (0)	Um...straight unrestricted exhaust and you're surprised that its stupid loud? I'm surprised that you're surprised. __________________ "Prius" is Latin for Eunuch. "Hrothgar": 2012 135i: 6MT M-Sport, BSM/Blk; Nav, Premium, Convenience, HK Dinan Stage 2 +PPK /// BMW PE /// VRSF CP /// K&N /// Koni Sports /// RSFB Inserts /// MPS4S 225/255 /// Other Stuff
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03-16-2015, 04:36 AM	#14
Acheron83 Second Lieutenant 53 Rep 199 Posts Drives: F22 M240i Join Date: May 2013 Location: South Africa iTrader: (0) Garage List 2018 BMW X3 M40i [0.00] 2016 BMW M240i [0.00]	Get some resonators on those mids.
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03-16-2015, 04:08 PM	#15
zeeth2800 Private First Class 37 Rep 183 Posts Drives: 08 135i, 89 M3 Join Date: Oct 2013 Location: Corvallis, OR iTrader: (0)	Thanks for the suggestions. If it didn't have that buzz under 2000rpm I would keep it. Almost sounds like an exhaust leak till 2100rpm. It is a shame. __________________ 2008 135i SGM 6-Speed l AD Engineering ST 6262BB l MHD Tuned l MAXBoost/N20 Map l GFB electronic boost controller l Spec 2+ l Walbro 450 LPFP l VRSF 7" FMIC l VRSF CP l Tial BOV l BMR 3.5" Exhaust l BMS Catch Can l RB pcv l
	Appreciate 0 Quote

03-16-2015, 04:10 PM	#16
zeeth2800 Private First Class 37 Rep 183 Posts Drives: 08 135i, 89 M3 Join Date: Oct 2013 Location: Corvallis, OR iTrader: (0)	video/sound clip will be posted tonight from my iPotato 6 __________________ 2008 135i SGM 6-Speed l AD Engineering ST 6262BB l MHD Tuned l MAXBoost/N20 Map l GFB electronic boost controller l Spec 2+ l Walbro 450 LPFP l VRSF 7" FMIC l VRSF CP l Tial BOV l BMR 3.5" Exhaust l BMS Catch Can l RB pcv l
	Appreciate 0 Quote

03-16-2015, 09:32 PM	#17
stuggy Second Lieutenant 133 Rep 261 Posts Drives: F80 M3 Join Date: Jan 2013 Location: NJ iTrader: (3)	I know that buzzing/rasp your describing. I had catless downpipes, catless and non-resonated Midpipes with stock axle back. It rasp'd bad accelerating between 1500-2200. I think if you add some resonators in the Midpipes, like others are suggesting, it should help.
	Appreciate 0 Quote

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