Crackle "Pop corn" exhaust

matt.nbg · 09-15-2012, 09:22 AM

Hello,

I recently purchased an 07 e90. I come from the Subaru STi community, so in modding this car I really want to get a great sound out of it. I know it is not a Subaru and it's a completely different car, but I was wondering if anyone has any idea which exhaust set up will allow me to attain the crackle and popping noise during down shifts and hard acceleration that a lot of VW's and some E92's with after market set ups have. I know some people pull it off with straight pipe axel backs with cats, I'm just unsure.

Any help would be appreciated.
Thanks a lot

CoralRed335XI · 09-15-2012, 09:39 AM

You need to run an E85/soy sauce blend.

But seriously, you should be getting that gurgle sound on downshifts, is that what ur talking about?

ihc95 · 09-15-2012, 09:42 AM

Do you have a 328i or 335i?

ajm8127 · 09-15-2012, 11:27 AM

Tune your car rich and keep your cats. The unburnt hydrocarbons will exit the engine and ignite in the cats making the sound you are talking about. A free flowing rear section should make the sound more obvious.

I'm not sure about this, but removing the front cats in the downpipes, but keeping the secondary cats may make the sound louder as well. My thinking is that the excess hydrocarbons will ignite only in the secondary cats, which is closer to the exhaust tip. If the hydrocarbons burn in the first cats, the sound may be muffled by the secondary cats.

Gugs · 09-15-2012, 11:37 AM

You can make it pop all day stock. Just lay ur foot on the gas. Like lay it. Not even press then let go. The wastegates and CANflap will make it gargle all day long. Do the simple golf tee mod it wil amplify it also.

hemi to e90 · 09-15-2012, 12:12 PM

im catless with secondary cats removed on an otherwise stock exhaust, i do it all day.

lonestar22 · 09-15-2012, 07:35 PM

yeah if you barely let down on the throttle and lift up really fast itll pop over and over and over again until you stop doing it

Kerosene Hat · 09-15-2012, 08:39 PM

^^^this

idrift4wd · 09-15-2012, 09:45 PM

MUFFLER DELETE=pop corn machine.

srs. seriously loud pops, sounds like fireballs.

matt.nbg · 09-15-2012, 11:29 PM

Thanks everyone for your replies. I drive a 335i, stock as of now and I was at the impact show here in MD, and a vendor told me I need down pipes with an aftermarket exhaust with no resonators to get the crackle and popcorn sound.

Overspooled · 11-17-2012, 07:37 PM

Muffler delete has the best sound, pops right when you release the gas, every single time!!! Cheap mod and sounds like a monster!

I3ossman · 11-17-2012, 07:50 PM

I have BMW perf exhaust w/ AR catless downpipes and it gurgles and pops like mad, turns heads is an understatement. I always find myself driving without the radio on because im just listening to the sweet music of the n54

Nick.bmw · 11-01-2016, 02:10 AM

Quote:

Originally Posted by I3ossman

I have BMW perf exhaust w/ AR catless downpipes and it gurgles and pops like mad, turns heads is an understatement. I always find myself driving without the radio on because im just listening to the sweet music of the n54

Nice !! I have a N55 335i with the bmw PE . Did you have any error codes with the downpipe ? or a tune required ?

i am after pops, burbles and crackles too

BSM n54iS · 11-01-2016, 02:43 AM

Quote:

Originally Posted by matt.nbg

Thanks everyone for your replies. I drive a 335i, stock as of now and I was at the impact show here in MD, and a vendor told me I need down pipes with an aftermarket exhaust with no resonators to get the crackle and popcorn sound.

Tune with MHD, turn on the burble option...problem solved

cb1 · 11-01-2016, 11:22 AM

I noticed more burble when my car was running rich.

Jeff@TopGearSolutions · 11-01-2016, 11:23 AM

Quote:

Originally Posted by cb1

I noticed more burble when my car was running rich.

The burble is just un-burnt fuel.

CanadianTSi · 11-01-2016, 11:32 AM

This thread is 4 years old...

BSM n54iS · 11-02-2016, 10:49 AM

Ahh shit! I hate it when that happens.. all I saw was the last post before mine. Stop doing that!!

JasW · 11-02-2016, 12:20 PM

Quote:

Originally Posted by Black n54is

Ahh shit! I hate it when that happens.. all I saw was the last post before mine. Stop doing that!!

I came in here thinking it had to be an MHD burble thread. Love that feature on MHD.

Tiago@VRSF · 11-02-2016, 12:28 PM

A lot of that unburned fuel combusts in your turbine housing. I'm all for the pops/burbles and I hate to be the fun police but this feature is known to prematurely destroy turbos.

09-15-2012, 09:22 AM	#1
matt.nbg Private 6 Rep 77 Posts Drives: e90 Join Date: Aug 2012 Location: Maryland iTrader: (0)	Crackle "Pop corn" exhaust Hello, I recently purchased an 07 e90. I come from the Subaru STi community, so in modding this car I really want to get a great sound out of it. I know it is not a Subaru and it's a completely different car, but I was wondering if anyone has any idea which exhaust set up will allow me to attain the crackle and popping noise during down shifts and hard acceleration that a lot of VW's and some E92's with after market set ups have. I know some people pull it off with straight pipe axel backs with cats, I'm just unsure. Any help would be appreciated. Thanks a lot
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09-15-2012, 09:39 AM	#2
CoralRed335XI Captain 103 Rep 646 Posts Drives: 2008 E92 335XI Coupe Join Date: Aug 2011 Location: NJ,VA iTrader: (4) Garage List 2008 BMW 335XI [3.66]	You need to run an E85/soy sauce blend. But seriously, you should be getting that gurgle sound on downshifts, is that what ur talking about? __________________ 2008 E92 335XI, Space Gray on Coral/Fox Red Hybrid M3 seats, Premium, Cold Weather, Comfort Access, iPod. Mods: Fox Red M3 seats up front, KW V1, ER CP + TIAL BOV.
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09-15-2012, 09:42 AM	#3
ihc95 Major 149 Rep 1,316 Posts Drives: 2021 X3 M40i, 2018 Mustang GT Join Date: Jul 2011 Location: NJ iTrader: (1) Garage List 2007 BMW 335i Coupe [0.00]	Do you have a 328i or 335i?
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09-15-2012, 11:27 AM	#4
ajm8127 Private 0 Rep 80 Posts Drives: '07 335i Join Date: Aug 2012 Location: Pittsburgh iTrader: (0)	Tune your car rich and keep your cats. The unburnt hydrocarbons will exit the engine and ignite in the cats making the sound you are talking about. A free flowing rear section should make the sound more obvious. I'm not sure about this, but removing the front cats in the downpipes, but keeping the secondary cats may make the sound louder as well. My thinking is that the excess hydrocarbons will ignite only in the secondary cats, which is closer to the exhaust tip. If the hydrocarbons burn in the first cats, the sound may be muffled by the secondary cats.
	Appreciate 0 Quote

09-15-2012, 11:37 AM	#5
Gugs Banned 30 Rep 457 Posts Drives: E92 JetBlack Join Date: Jul 2012 Location: Long island iTrader: (1)	You can make it pop all day stock. Just lay ur foot on the gas. Like lay it. Not even press then let go. The wastegates and CANflap will make it gargle all day long. Do the simple golf tee mod it wil amplify it also.
	Appreciate 0 Quote

09-15-2012, 12:12 PM	#6
hemi to e90 dat boost doe 242 Rep 1,828 Posts Drives: 10 335i 21 740li Join Date: Aug 2005 Location: nyc iTrader: (1)	im catless with secondary cats removed on an otherwise stock exhaust, i do it all day. __________________
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09-15-2012, 07:35 PM	#7
lonestar22 Ground Clearance? 264 Rep 1,672 Posts Drives: 540i & X5 Join Date: Jul 2009 Location: DFW iTrader: (-1)	yeah if you barely let down on the throttle and lift up really fast itll pop over and over and over again until you stop doing it __________________ E90 330i - E90 335i - E92 335i
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09-15-2012, 08:39 PM	#8
Kerosene Hat Regional Governor 26 Rep 556 Posts Drives: '10 E92 335i Join Date: Apr 2007 Location: ATL iTrader: (0)	^^^this
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09-15-2012, 09:45 PM	#9
idrift4wd Brigadier General 151 Rep 3,549 Posts Drives: Three Hundred and Thirty Five Join Date: Jul 2010 Location: Yonkers NY iTrader: (0) Garage List 2007 BMW [7.00]	MUFFLER DELETE=pop corn machine. srs. seriously loud pops, sounds like fireballs.
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09-15-2012, 11:29 PM	#10
matt.nbg Private 6 Rep 77 Posts Drives: e90 Join Date: Aug 2012 Location: Maryland iTrader: (0)	Thanks everyone for your replies. I drive a 335i, stock as of now and I was at the impact show here in MD, and a vendor told me I need down pipes with an aftermarket exhaust with no resonators to get the crackle and popcorn sound.
	Appreciate 0 Quote

11-17-2012, 07:37 PM	#11
Overspooled MurderedOut 17 Rep 339 Posts Drives: 2013 c63 AMG Coupe Join Date: Sep 2012 Location: Montreal iTrader: (0)	Muffler delete has the best sound, pops right when you release the gas, every single time!!! Cheap mod and sounds like a monster!
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11-17-2012, 07:50 PM	#12
I3ossman Private First Class 7 Rep 139 Posts Drives: E92 335 Join Date: Jun 2011 Location: Ct iTrader: (0)	I have BMW perf exhaust w/ AR catless downpipes and it gurgles and pops like mad, turns heads is an understatement. I always find myself driving without the radio on because im just listening to the sweet music of the n54
	Appreciate 0 Quote

11-01-2016, 11:22 AM	#15
cb1 Lieutenant 61 Rep 425 Posts Drives: F82 LCI zcomp, e92 M3, e46 M3 Join Date: Jun 2011 Location: 91789 iTrader: (7)	I noticed more burble when my car was running rich.
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11-01-2016, 11:32 AM	#17
CanadianTSi Captain 207 Rep 607 Posts Drives: 2014 535 xDrive Diesel Join Date: Feb 2007 Location: Alberta iTrader: (0)	This thread is 4 years old...
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11-02-2016, 10:49 AM	#18
BSM n54iS Brigadier General 2683 Rep 4,203 Posts Drives: '11 335is \| '16 Macan Turbo Join Date: Aug 2015 Location: Everywhere and Nowhere iTrader: (7)	Ahh shit! I hate it when that happens.. all I saw was the last post before mine. Stop doing that!! __________________ '11 335is BSM MT "BMW Performance Editon" \| '16 Porsche Macan Turbo GruppeM CF Intake \| AR Resonated DP \| ER CP \| Turbosmart RacePort BOV \| Cobb FMIC \| RB Inlets \| RB External Mishi/Turner OCC \| Michelin PS4 \| BMW Performance Springs/Bilstein B8 + Dinan & M3 bits \| BMW Brembo BBK \| BMW Performance CF Spoiler \| BMW Performance CF Lip \| BMW Performance Alcantara \| PS Designs GTS Armrest \| AG H6-40 \| Rear Seat Delete
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11-02-2016, 12:28 PM	#20
Tiago@VRSF 2108 Rep 43,350 Posts Drives: F90 M5 Join Date: Dec 2007 Location: Doral, FL iTrader: (99) Garage List 2014 F30 328xi [0.00] 2015 F82 BMW M4 [0.00] 2013 Ducati 1199 Pa ... [0.00] 2008 BMW 335i [0.00]	A lot of that unburned fuel combusts in your turbine housing. I'm all for the pops/burbles and I hate to be the fun police but this feature is known to prematurely destroy turbos.
	Appreciate 0 Quote