new exhaust sounds great, smells bad

BlueLion · 01-22-2012, 02:27 PM

I had my catless dp, MS, installed with the vanguard exhaust. The combo sounds great, its just the smell i can't stand. Anyone with a similar combo have a solution? HFC? If not the stock exhaust is going back on.

cn555ic · 01-22-2012, 02:29 PM

Give it some time to break in with carbon deposits and the mufflers will absorb some of the smell. Give at least two weeks and smell will subside a little. You will still smell it but no as bad. I first had the secondary cats taken out and the smell was noticeable but it got better , then when I installed the catless dps the smell was really strong.

EDM92 · 01-22-2012, 02:30 PM

Quote:

Originally Posted by BlueLion

I had my catless dp, MS, installed with the vanguard exhaust. The combo sounds great, its just the smell i can't stand. Anyone with a similar combo have a solution? HFC? If not the stock exhaust is going back on.

Blue, don't give up on it bro! You will get used to it! It's the cat less downpipes that give most of the smell, not the Vanguard cat back. I've only been running cat less for a few days and even my younger sister is used to the smell. The power is worth it.

Route 16 · 01-22-2012, 02:36 PM

No primary cats (main reason) = bad smell.

No 2ndary cat + no resonator = no smell.

EJ_3 · 01-22-2012, 02:48 PM

if you decide to get rid of the exhaust, pm me

BEAR-AvHistory · 01-22-2012, 02:53 PM

Cats kill the smell, you can't take them 100% out of the loop & get no smell...maybe high performance cats from a bigger V8 motor might be merged into the system.

BlueLion · 01-22-2012, 03:13 PM

^ thanks for the encouragement guys, so far i have about 150 miles on the new dp and exhaust....is that not enough to break/burn them in?

Quote:

Originally Posted by BEAR-AvHistory

Cats kill the smell, you can't take them 100% out of the loop & get no smell...maybe high performance cats from a bigger V8 motor might be merged into the system.

yeah I know this for reading about it, but experiencing it is a different thing. Right now its bad and i hope it gets better.

I'll weight the options going back to a stock exhaust, getting a set of hfc put in, or an axel back exhaust...

NiVeDh · 01-22-2012, 04:44 PM

Weld some HFCs in.

ashleymarie0792 · 01-22-2012, 05:34 PM

dumb question what is HFC ??? also im doing a custom exhaust sytem my buddie is welding it up.. Y to a single with AR25 3" to a Y dual exhaust 4 inch tips. no mufflers no cats .

MDORPHN · 01-22-2012, 05:44 PM

Quote:

Originally Posted by ashleymarie0792

dumb question what is HFC ??? also im doing a custom exhaust sytem my buddie is welding it up.. Y to a single with AR25 3" to a Y dual exhaust 4 inch tips. no mufflers no cats .

HFC = high-flow catalytic converter.

Neil

EDM92 · 01-22-2012, 08:28 PM

Quote:

Originally Posted by ashleymarie0792

dumb question what is HFC ??? also im doing a custom exhaust sytem my buddie is welding it up.. Y to a single with AR25 3" to a Y dual exhaust 4 inch tips. no mufflers no cats .

That's going to be way too loud and annoying, at least I would think so.

Syndicategt · 01-22-2012, 08:35 PM

I love the smell of catless exhaust in the morning. Probably killing brain cells though, or causing cancer, but who cares.....were all gonna die in 2012 anyways

Fred_Boosted · 01-22-2012, 09:52 PM

I love your avatar.

Every car without cat smells not good...

Have to stand it if we want power....

ashleymarie0792 · 01-22-2012, 09:59 PM

Quote:

Originally Posted by BMWorNOTHING

That's going to be way too loud and annoying, at least I would think so.

yes its gonna be loud but not gonna be to loud.. res ar25 silents it down a lil bit.. if anything ill put to mufflers on it not a big deal well see!

nitehawk · 01-23-2012, 12:05 AM

If you're driving around with the windows up, always have the fan recirc on. Helps to prevent most of the fumes entering the cabin.

BlueLion · 01-23-2012, 06:09 AM

Quote:

Originally Posted by nitehawk

If you're driving around with the windows up, always have the fan recirc on. Helps to prevent most of the fumes entering the cabin.

I have been doing that.

I have not change the O2 setting in the procede yet, i just have can clear on. Think changing the O2 setting might help?

cn555ic · 01-23-2012, 06:45 AM

Quote:

Originally Posted by BlueLion

I have been doing that.

I have not change the O2 setting in the procede yet, i just have can clear on. Think changing the O2 setting might help?

Changing values will not help. Drive with it for another couple of weeks then decide. Remember you are coming from a totally chatted system to no cats all at once

stratos_335 · 01-23-2012, 09:58 AM

Drive the car hard and enjoy the power. Soon the smell will fade out and you will forget it as the smile will keep growing on your face

cn555ic · 01-23-2012, 10:04 AM

Truth is the smell is not that bad after awhile. I love it and this is my first fully catless car

BlueLion · 01-23-2012, 10:12 AM

im thinking i will give it until summer to see if it clears up any......if not maybe ill find a hfc solution

Syndicategt · 01-23-2012, 10:22 AM

Quote:

Originally Posted by BlueLion

im thinking i will give it until summer to see if it clears up any......if not maybe ill find a hfc solution

I have HFC's, they only help a little bit....not worth the money if you just want to cover up the smell.

cn555ic · 01-23-2012, 10:32 AM

Quote:

Originally Posted by BlueLion

im thinking i will give it until summer to see if it clears up any......if not maybe ill find a hfc solution

You will get use to it, plus Florida doesn't have emissions testing FTW

01-22-2012, 02:27 PM	#1
BlueLion she likes the flavor...... 85 Rep 1,622 Posts Drives: A51-E92 Join Date: Nov 2006 Location: Bradenton - FL iTrader: (4) Garage List 2022 X3MC [0.00]	new exhaust sounds great, smells bad I had my catless dp, MS, installed with the vanguard exhaust. The combo sounds great, its just the smell i can't stand. Anyone with a similar combo have a solution? HFC? If not the stock exhaust is going back on. __________________ E92 Montego Blue silfa718 ..::STETT CAI\|ADVAN RS\|WAGNER FMIC\|MS DP\|VANGUARD\|PROCEDE\|FORGE DV\|BMS OCC\|KWV2\|MICHELIN PSS\|OOS::..
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01-22-2012, 02:29 PM	#2
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Give it some time to break in with carbon deposits and the mufflers will absorb some of the smell. Give at least two weeks and smell will subside a little. You will still smell it but no as bad. I first had the secondary cats taken out and the smell was noticeable but it got better , then when I installed the catless dps the smell was really strong.
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01-22-2012, 02:36 PM	#4
Route 16 I got lei'd 844 Rep 7,593 Posts Drives: '10 E90 M3 Join Date: Sep 2011 Location: Dark Side of the Moon iTrader: (62)	No primary cats (main reason) = bad smell. No 2ndary cat + no resonator = no smell.
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01-22-2012, 02:48 PM	#5
EJ_3 Colonel 371 Rep 2,838 Posts Drives: e92 335i, e34 525i & e60 530i Join Date: Aug 2011 Location: N Las Vegas iTrader: (13) Garage List 2007 BMW 335i [8.34] 2016 Ram 1500 Sport [8.00] 1994 BMW 525i [10.00] 2007 BMW 530i [8.66]	if you decide to get rid of the exhaust, pm me __________________ click here for mods
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01-22-2012, 02:53 PM	#6
BEAR-AvHistory 2020 Z4 M40i - 2022 M4C Convt 3129 Rep 5,264 Posts Drives: 2020 Z4 M40i - 2022 M4C Convrt Join Date: Jun 2011 Location: Raleigh, NC - OIB, NC iTrader: (0) Garage List 1965 COBRA (FFR rep ... [8.57] 2023 Jeep Wrangler ... [9.50] 2009 Yamaha V-Star [0.00] Cars 2-BMW, 2-FORD, ... [0.00] 2023 Ford Expeditio ... [0.00] 2020 Z4 M40i [10.00] 2022 BMW M4C [7.25] 1998 FORD Ranger 4X4 [0.00]	Cats kill the smell, you can't take them 100% out of the loop & get no smell...maybe high performance cats from a bigger V8 motor might be merged into the system. __________________ Kevin Dravit Gray, Black Leather, Moonlight Roof, Red Calipers 2022 M4C - 2020 Z4 M40i - 2023 FORD Expedition XLT Max 4X4 400BHP - 2009 V-Star - 1998 Ranger 4X4 5MT - 1965 Cobra (R) 5MT - 2023 Jeep Wrangler Sport S 6MT
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01-22-2012, 04:44 PM	#8
NiVeDh Major General 422 Rep 8,003 Posts Drives: '08 E90 335i, '99 E36 M3 Join Date: Apr 2009 Location: Houston, TX & Atlanta, GA iTrader: (132) Garage List 2008 BMW 335i Sedan [8.66]	Weld some HFCs in.
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01-22-2012, 05:34 PM	#9
ashleymarie0792 Banned 8 Rep 203 Posts Drives: 335i e92 Join Date: Jan 2012 Location: florida iTrader: (1)	dumb question what is HFC ??? also im doing a custom exhaust sytem my buddie is welding it up.. Y to a single with AR25 3" to a Y dual exhaust 4 inch tips. no mufflers no cats .
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01-22-2012, 08:35 PM	#12
Syndicategt Brigadier General 153 Rep 3,730 Posts Drives: 335i Join Date: Sep 2009 Location: Nor Cal iTrader: (11)	I love the smell of catless exhaust in the morning. Probably killing brain cells though, or causing cancer, but who cares.....were all gonna die in 2012 anyways __________________ 2008 BMW 335i e90 - Sold - Rob Beck Turbos / PROcede V5 / Aquamist HFS-4 / AR Downpipes / AE Exhaust / ER Comp FMIC / ER CP / TiAL BOV / Custom Intake / RPI Scoops / Quaife LSD / Swift-Koni Coilovers / DSS HS / Morr VS8.2 Sig Black / Michelin PSS / P3 Boost Guage / M3 body / M3 steering wheel / Adam's Rotors / Hawk HPS / SS lines /
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01-22-2012, 09:52 PM	#13
Fred_Boosted Captain 90 Rep 632 Posts Drives: 335i Join Date: Nov 2011 Location: USA iTrader: (1) Garage List 2010 BMW 335i [8.00]	I love your avatar. Every car without cat smells not good... Have to stand it if we want power....
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01-23-2012, 12:05 AM	#15
nitehawk Lieutenant Colonel 102 Rep 1,903 Posts Drives: e92 335i 6MT Join Date: May 2011 Location: Toronto iTrader: (15) Garage List E92 BMW 335i [9.00] E92 BMW 335i \| Retired [10.00]	If you're driving around with the windows up, always have the fan recirc on. Helps to prevent most of the fumes entering the cabin.
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01-23-2012, 09:58 AM	#18
stratos_335 First Lieutenant 36 Rep 332 Posts Drives: BMW 335i Join Date: Sep 2009 Location: Greece iTrader: (0)	Drive the car hard and enjoy the power. Soon the smell will fade out and you will forget it as the smile will keep growing on your face
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01-23-2012, 10:04 AM	#19
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	Truth is the smell is not that bad after awhile. I love it and this is my first fully catless car
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01-23-2012, 10:12 AM	#20
BlueLion she likes the flavor...... 85 Rep 1,622 Posts Drives: A51-E92 Join Date: Nov 2006 Location: Bradenton - FL iTrader: (4) Garage List 2022 X3MC [0.00]	im thinking i will give it until summer to see if it clears up any......if not maybe ill find a hfc solution __________________ E92 Montego Blue silfa718 ..::STETT CAI\|ADVAN RS\|WAGNER FMIC\|MS DP\|VANGUARD\|PROCEDE\|FORGE DV\|BMS OCC\|KWV2\|MICHELIN PSS\|OOS::..
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