N55 Stage 2 Turbo, Catless, BMW PE

SUPAN · 04-09-2015, 03:09 AM

Good day seniors!

I am starting this thread for a discussion or maybe find a solution for my problems which you might have the answer;

N55 E92
Stage 2 hybrid turbo
4 AR Catless (Now converted to 100 cel)
BMW PE exhaust

The morning cold start is way too loud.
The daily driven car also has drones and raspy at low RPMs. Maybe i could call this sound a motorboat sound at 1.5-3 k rpm.

At 3.5k rpm the sound is like f1 and feel great.

Question :

1) How to get rid of the rasp and drone and reduce cold start loudness problems ?
2) Is n55 e92 Midpipe hollow ? anybody has mod this with Resonators ?
3) Is operating the PE exhaust muffler and stuff with racing straws (to reduce the sound and option ?)

I need an option prior further moding of clutch / lsd / engines ...

many thanks!

Dark_Knight_335 · 04-09-2015, 05:18 AM

DPs and catless DPs....that'll wake the dead for sure LOL

I'd try putting a stock exhaust on and sell that raspy "always on" PE. You'll lose power any other way.

CantCatchMe · 04-09-2015, 07:35 AM

Put a 3" vibrant resonator on, you'll notice how quickly drone decreases marginally and helps with the rasp. I have secondary cats so it'll help keep it down. Let us know what you decide to do.

melloww22 · 04-09-2015, 11:02 AM

Catless DP and PE deludes the buyer into thinking your BMW is now a race car... At least it sounds like it, however for daily use it is really annoying.

To reduce drone a possible option is to use "header heat wrap" and wrap your exhaust.

I just recently went back to stock DP from AR DP because the dealer would not fix my HPFP and Fuel Rail Sensor while my car was an FBO.

wgknestrick · 04-09-2015, 11:55 AM

adding a 2nd muffler (resonator) helps a ton, while also refining the sound.

Exhaust wrap does nothing to sound and will just help corrode your pipes in 5 years.

Knobi · 04-09-2015, 11:57 AM

I have the BMW PE with AR 4" kittyless and my neighbors hate me. I saw some guys in here with added resonators and it helps with the raspy sound. Let us know if you figure it out, im sure im not the only curious one

DevonD · 04-09-2015, 12:35 PM

Just get rid of the PE. The car is way too loud with both PE and downpipe's. I think it's one or the other. But one of them adds power while the other just brings drone. N55's still sound sick with just the DP and stock exhaust

Bjs128 · 04-09-2015, 04:19 PM

Get a resonator….will get rid of the rasp and still give a nice sound

PeteA · 04-09-2015, 05:29 PM

Maddad midpipes have a pair of mini resonators in them if you dont want to go too far away from the loudness you currently have.

SUPAN · 04-09-2015, 08:28 PM

Quote:

Originally Posted by Dark_Knight_335

DPs and catless DPs....that'll wake the dead for sure LOL

I'd try putting a stock exhaust on and sell that raspy "always on" PE. You'll lose power any other way.

Thanks ...

SUPAN · 04-09-2015, 08:29 PM

Quote:

Originally Posted by CantCatchMe

Put a 3" vibrant resonator on, you'll notice how quickly drone decreases marginally and helps with the rasp. I have secondary cats so it'll help keep it down. Let us know what you decide to do.

Mine is a n55 so yet to seen anybody done that yet ...

N54 have seen many done the vibrant resonator mods

Heard is 2.5 inch ? pls confirm if 2.5 inch or 3 ?

SUPAN · 04-09-2015, 08:30 PM

Quote:

Originally Posted by wgknestrick

adding a 2nd muffler (resonator) helps a ton, while also refining the sound.

Exhaust wrap does nothing to sound and will just help corrode your pipes in 5 years.

Thanks ....

have u done that ?

SUPAN · 04-09-2015, 08:31 PM

Quote:

Originally Posted by DevonD

Just get rid of the PE. The car is way too loud with both PE and downpipe's. I think it's one or the other. But one of them adds power while the other just brings drone. N55's still sound sick with just the DP and stock exhaust

thanks advise...

Sidewinderpb · 04-10-2015, 12:12 AM

I'll trade you my stock exhaust with PE mod for your PE 😁 lol

Dark_Knight_335 · 04-10-2015, 05:20 AM

Quote:

Originally Posted by Sidewinderpb

I'll trade you my stock exhaust with PE mod for your PE 😁 lol

Good luck with those shipping costs bro...dude's in Malaysia!

Sup Sidewinder?

Sidewinderpb · 04-10-2015, 06:29 AM

Quote:

Originally Posted by Dark_Knight_335

Good luck with those shipping costs bro...dude's in Malaysia!

Sup Sidewinder?

But a mere skip across the pond lmao

What's going on bro beans?

ONDEMAND · 04-10-2015, 07:55 AM

Quote:

Originally Posted by DevonD

Just get rid of the PE. The car is way too loud with both PE and downpipe's. I think it's one or the other. But one of them adds power while the other just brings drone. N55's still sound sick with just the DP and stock exhaust

Seriously the stock n55 exhaust sytem with catless DP sounds perfect and is not to loud. Cold starts however will be loud with anything other than completely stock.

hetzle · 04-10-2015, 12:16 PM

No rasp with my AA exhaust, I think the X-pipe it comes with might be the reason.

Dark_Knight_335 · 04-10-2015, 02:06 PM

Quote:

Originally Posted by Sidewinderpb

Quote:

Originally Posted by Dark_Knight_335

Good luck with those shipping costs bro...dude's in Malaysia!

Sup Sidewinder?

But a mere skip across the pond lmao

What's going on bro beans?

Getting ready for my wedding in July, praying my hardtop doesn't start leaking again

Sidewinderpb · 04-10-2015, 03:41 PM

Quote:

Originally Posted by Dark_Knight_335

Getting ready for my wedding in July, praying my hardtop doesn't start leaking again

Congrats man; that's awesome!

Just line the top with duct tape, and you'll be all set

Sorry for thread jack op

Dark_Knight_335 · 04-10-2015, 05:23 PM

Quote:

Originally Posted by Sidewinderpb

Quote:

Originally Posted by Dark_Knight_335

Getting ready for my wedding in July, praying my hardtop doesn't start leaking again

Congrats man; that's awesome!

Just line the top with duct tape, and you'll be all set

Sorry for thread jack op

I'm about to run tub caulk and silicone all around the damn thing and never use it again!! Thank you sir

Double sorry for the thread jack...carry on!

SUPAN · 04-12-2015, 10:57 PM

Thanks all advise ... will study this week if to quieten the PE muffler box or to resonate the mid pipes ...

Will update further

04-09-2015, 03:09 AM	#1
SUPAN Private First Class 6 Rep 157 Posts Drives: E92 n55 335 2011 dct Join Date: Oct 2013 Location: Malaysia, KL iTrader: (0)	N55 Stage 2 Turbo, Catless, BMW PE - Too loud Good day seniors! I am starting this thread for a discussion or maybe find a solution for my problems which you might have the answer; N55 E92 Stage 2 hybrid turbo 4 AR Catless (Now converted to 100 cel) BMW PE exhaust The morning cold start is way too loud. The daily driven car also has drones and raspy at low RPMs. Maybe i could call this sound a motorboat sound at 1.5-3 k rpm. At 3.5k rpm the sound is like f1 and feel great. Question : 1) How to get rid of the rasp and drone and reduce cold start loudness problems ? 2) Is n55 e92 Midpipe hollow ? anybody has mod this with Resonators ? 3) Is operating the PE exhaust muffler and stuff with racing straws (to reduce the sound and option ?) I need an option prior further moding of clutch / lsd / engines ... many thanks!
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04-09-2015, 05:18 AM	#2
Dark_Knight_335 Came to the N55 Darkside 1112 Rep 12,740 Posts Drives: 2011 335 E93 M-Sport Join Date: May 2010 Location: NY/NJ iTrader: (28)	DPs and catless DPs....that'll wake the dead for sure LOL I'd try putting a stock exhaust on and sell that raspy "always on" PE. You'll lose power any other way.
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04-09-2015, 07:35 AM	#3
CantCatchMe Lieutenant Colonel 340 Rep 1,744 Posts Drives: 2012 335i xdrive msport(E92) Join Date: Aug 2014 Location: West Bloomfield, MI iTrader: (2)	Put a 3" vibrant resonator on, you'll notice how quickly drone decreases marginally and helps with the rasp. I have secondary cats so it'll help keep it down. Let us know what you decide to do.
	Appreciate 1 Quote

04-09-2015, 11:02 AM	#4
melloww22 Captain 105 Rep 955 Posts Drives: 2011 335i E90 Join Date: Apr 2011 Location: San Diego iTrader: (1)	Catless DP and PE deludes the buyer into thinking your BMW is now a race car... At least it sounds like it, however for daily use it is really annoying. To reduce drone a possible option is to use "header heat wrap" and wrap your exhaust. I just recently went back to stock DP from AR DP because the dealer would not fix my HPFP and Fuel Rail Sensor while my car was an FBO.
	Appreciate 0 Quote

04-09-2015, 11:55 AM	#5
wgknestrick Private First Class 43 Rep 133 Posts Drives: 2011 335 xdrive Join Date: Dec 2014 Location: Lancaster PA iTrader: (0)	adding a 2nd muffler (resonator) helps a ton, while also refining the sound. Exhaust wrap does nothing to sound and will just help corrode your pipes in 5 years.
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04-09-2015, 11:57 AM	#6
Knobi Captain 93 Rep 716 Posts Drives: 2015 YMB M3 Join Date: Jan 2009 Location: Weston, FL iTrader: (4) Garage List 2011 BMW E90 335i [9.50]	I have the BMW PE with AR 4" kittyless and my neighbors hate me. I saw some guys in here with added resonators and it helps with the raspy sound. Let us know if you figure it out, im sure im not the only curious one __________________ 2015 BMW M3 \| DCT \| Yas Marina Blue \| Silverstone \| Executive \| Lightning \| Driver Assistant \| Carbon Ceramic Brakes Instagram: @benrivasplata
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04-09-2015, 12:35 PM	#7
DevonD Private 10 Rep 70 Posts Drives: 2016 340i Join Date: Oct 2014 Location: Canada iTrader: (0)	Just get rid of the PE. The car is way too loud with both PE and downpipe's. I think it's one or the other. But one of them adds power while the other just brings drone. N55's still sound sick with just the DP and stock exhaust
	Appreciate 1 Quote

04-09-2015, 04:19 PM	#8
Bjs128 Private First Class 7 Rep 150 Posts Drives: 2011 335i Coupe Join Date: Apr 2014 Location: Chicago, IL iTrader: (2)	Get a resonator….will get rid of the rasp and still give a nice sound
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04-09-2015, 05:29 PM	#9
PeteA Major 127 Rep 1,054 Posts Drives: E30, E82 Join Date: Sep 2012 Location: Melbourne iTrader: (3)	Maddad midpipes have a pair of mini resonators in them if you dont want to go too far away from the loudness you currently have.
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04-10-2015, 12:12 AM	#14
Sidewinderpb Banned 329 Rep 1,739 Posts Drives: 2017 340i xDrive 6mt Join Date: Nov 2013 Location: CT iTrader: (7)	I'll trade you my stock exhaust with PE mod for your PE 😁 lol
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04-10-2015, 12:16 PM	#18
hetzle First Lieutenant 32 Rep 373 Posts Drives: E90 335i Join Date: Dec 2011 Location: San Francisco, California iTrader: (0)	No rasp with my AA exhaust, I think the X-pipe it comes with might be the reason. __________________ 2011 335i sedan 6MT, 515whp/530wtq. Pure Turbo Stage 2, Motiv SST TwinDisk Clutch/FW, Motiv Flash, AA 4" DP, ER FMIC, AA turbo-back exhaust, Quaife LSD, ST Coilovers, BMS Intake, UUC DSSR+SSK, ER CP, BMS CDV, BMS OCC, Arkym CF trunk
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04-12-2015, 10:57 PM	#22
SUPAN Private First Class 6 Rep 157 Posts Drives: E92 n55 335 2011 dct Join Date: Oct 2013 Location: Malaysia, KL iTrader: (0)	Thanks all advise ... will study this week if to quieten the PE muffler box or to resonate the mid pipes ... Will update further
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