What can I do for louder exhaust set up?

ThickRhinoceros · 03-06-2019, 09:33 PM

Hey guys, I have a 2009 BMW 335I LCI E90. So far, I have the PE mod done on it, which would be the PE mod on the muffler, x pipe in place of resonator, and catless downpipes. I notice that this really doesn't have that much sound unless revving pretty high and I don't really do that during daily driving. I want to be able to at least hear it during daily driving because even with the windows down I can't hear much at all. Is there anything else I can consider doing besides deleting secondary cats? (don't think I want to do a straight muffler delete either because from what i've heard, it kind of kills the tone).

Jerain · 03-07-2019, 05:02 AM

That's weird unless you are used to really loud exhaust. I only have catless DP's and muffler valve mod permanently open ("golf tee mod") with stock muffler and sounds really great, deep and sweet 6 cylinder sounds even from low rpm and you can hear me from miles away according to my friends...

type-dRew · 03-07-2019, 06:51 AM

That's the first i've heard of someone calling this combo quiet.

I just have flap bypassed currently and i consider it fairly loud, i can hear it windows up or down easily.

Maybe your secondaries are clogged a bit? I'd gut those or have them deleted and see what that does for you. I doubt you'd need/want much more.

Antetokounmpo · 03-07-2019, 08:23 AM

if you're used to a naturally aspirated engine, any turbo engine will be quiet unless you have a open dump wastegate.

TemjinX2 · 03-07-2019, 09:51 AM

you can do the electric exhaust flap bypass...there bunch of sound clips on youtube on it.

ThickRhinoceros · 03-07-2019, 01:48 PM

Quote:

Originally Posted by TemjinX2

you can do the electric exhaust flap bypass...there bunch of sound clips on youtube on it.

A lot of you seem to be mentioning opening the flap/valve. Are the valve and flap two different things? I have the flap open with JB4 and while I can tell it's louder than when it's closed, it doesn't even seem that significant. I was looking into the valvetronic exhaust and considering if maybe that might help my cause? Although that would make one muffler straight piped with valve controls and the other muffler still with the PE mod... wonder if it would work well.

ThickRhinoceros · 03-07-2019, 01:50 PM

Quote:

Originally Posted by type-dRew

That's the first i've heard of someone calling this combo quiet.

I just have flap bypassed currently and i consider it fairly loud, i can hear it windows up or down easily.

Maybe your secondaries are clogged a bit? I'd gut those or have them deleted and see what that does for you. I doubt you'd need/want much more.

Isn't messing with the secondary cats bad for the car?

ThickRhinoceros · 03-07-2019, 01:54 PM

Quote:

Originally Posted by Jerain

That's weird unless you are used to really loud exhaust. I only have catless DP's and muffler valve mod permanently open ("golf tee mod") with stock muffler and sounds really great, deep and sweet 6 cylinder sounds even from low rpm and you can hear me from miles away according to my friends...

Do you have a video? also same question as I asked the others, is the golf tee the same thing as opening the flap with JB4?

type-dRew · 03-07-2019, 01:58 PM

You already have PE mod, deleting the muffler entirely wont be much different with the valvetronic and since you dont use your exhaust valve/arent looking for a quiet exhaust. Having that adjustability isnt for you.

Quote:

Originally Posted by ThickRhinoceros

Isn't messing with the secondary cats bad for the car?

You have primary cat deletes. How is this a question?

type-dRew · 03-07-2019, 01:59 PM

Quote:

Originally Posted by ThickRhinoceros

Do you have a video? also same question as I asked the others, is the golf tee the same thing as opening the flap with JB4?

Yes it is.

ThickRhinoceros · 03-07-2019, 02:26 PM

Quote:

Originally Posted by type-dRew

You already have PE mod, deleting the muffler entirely wont be much different with the valvetronic and since you dont use your exhaust valve/arent looking for a quiet exhaust. Having that adjustability isnt for you.

You have primary cat deletes. How is this a question?

I'm a fking fool

TemjinX2 · 03-07-2019, 02:58 PM

Quote:

Originally Posted by ThickRhinoceros

A lot of you seem to be mentioning opening the flap/valve. Are the valve and flap two different things? I have the flap open with JB4 and while I can tell it's louder than when it's closed, it doesn't even seem that significant. I was looking into the valvetronic exhaust and considering if maybe that might help my cause? Although that would make one muffler straight piped with valve controls and the other muffler still with the PE mod... wonder if it would work well.

its basically a y pipe with a electric flap that you can open and close with a remote or switch.

when its open it bypasses the muffler so its basically same as running no muffler and you push the button again the flap closes and same as stock.

Bimmer_Engineer · 03-07-2019, 07:19 PM

Quote:

Originally Posted by ThickRhinoceros

I'm a fking fool

Lol

JDang · 03-09-2019, 09:05 PM

Catless Downpipes, my car stock naturally comes with an x-pipe, PE exhaust mod, and "Valve/Flap" Bypass.

Usually drive this car in Sport and it's actually quite a good combo, for me at least. If this isn't enough for you then you might as well replace secondary cats with vibrant resonators and get a muffler delete. Louder for sure at the expense of a stronger odor with it droning a bit as well. Personally I hate extremely loud "riced" cars.

Oh, removing the secondary cats will make it raspy too.

03-06-2019, 09:33 PM	#1
ThickRhinoceros New Member 3 Rep 24 Posts Drives: Black 335i E90 2009 Join Date: Oct 2018 Location: Hercules, California iTrader: (0)	What can I do for louder exhaust set up? Hey guys, I have a 2009 BMW 335I LCI E90. So far, I have the PE mod done on it, which would be the PE mod on the muffler, x pipe in place of resonator, and catless downpipes. I notice that this really doesn't have that much sound unless revving pretty high and I don't really do that during daily driving. I want to be able to at least hear it during daily driving because even with the windows down I can't hear much at all. Is there anything else I can consider doing besides deleting secondary cats? (don't think I want to do a straight muffler delete either because from what i've heard, it kind of kills the tone).
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03-07-2019, 05:02 AM	#2
Jerain Second Lieutenant 72 Rep 202 Posts Drives: E92 335i 6MT Join Date: Nov 2012 Location: Europe iTrader: (0)	That's weird unless you are used to really loud exhaust. I only have catless DP's and muffler valve mod permanently open ("golf tee mod") with stock muffler and sounds really great, deep and sweet 6 cylinder sounds even from low rpm and you can hear me from miles away according to my friends... __________________ ____________________________________________ 2007 BMW E92 335i 6MT lightweight - OS GIKEN Superlock LSD - FBO STAGE 2+ ETHANOL - TRACK/DRIFT/NÜRBURGRING
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03-07-2019, 06:51 AM	#3
type-dRew Major 641 Rep 1,245 Posts Drives: 2009 335i xDrive Join Date: Feb 2019 Location: Newport MI iTrader: (0)	That's the first i've heard of someone calling this combo quiet. I just have flap bypassed currently and i consider it fairly loud, i can hear it windows up or down easily. Maybe your secondaries are clogged a bit? I'd gut those or have them deleted and see what that does for you. I doubt you'd need/want much more.
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03-07-2019, 08:23 AM	#4
Antetokounmpo Brigadier General 1552 Rep 3,475 Posts Drives: E90 6MT FBO; '18 F150 Platinum Join Date: Jul 2013 Location: WI iTrader: (3) Garage List 2018 Ford F-150 Pla ... [0.00] 2008 BMW 335xi [0.00]	if you're used to a naturally aspirated engine, any turbo engine will be quiet unless you have a open dump wastegate. __________________ 2008 335xi 6MT \| VRSF Catless DP \| VRSF 7" FMIC \| VRSF CP \| TIAL BOV \| DCI \| MHD 2+ BC Racing BR \| Stoptech 600 \| Firehawk Indy 500 255 Square \| Atric Altimax 225 Sq. 2018 F-150 Platinum 701A \| FX4 \| 3.5 EcoBeast
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03-07-2019, 09:51 AM	#5
TemjinX2 Major 521 Rep 1,484 Posts Drives: 2008 335xi e92 Join Date: Dec 2009 Location: Socal OC iTrader: (0)	you can do the electric exhaust flap bypass...there bunch of sound clips on youtube on it.
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03-09-2019, 09:05 PM	#14
JDang Private 36 Rep 63 Posts Drives: '07 335i Join Date: Aug 2018 Location: Houston / Sugar Land iTrader: (0)	Catless Downpipes, my car stock naturally comes with an x-pipe, PE exhaust mod, and "Valve/Flap" Bypass. Usually drive this car in Sport and it's actually quite a good combo, for me at least. If this isn't enough for you then you might as well replace secondary cats with vibrant resonators and get a muffler delete. Louder for sure at the expense of a stronger odor with it droning a bit as well. Personally I hate extremely loud "riced" cars. Oh, removing the secondary cats will make it raspy too. __________________ Too much to list.
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