Sooting Up

Cozy · 02-11-2013, 03:01 PM

How long does it generally take for a new exhaust to soot/carbon up, tune its tone, deepen and lose the rasp?

I've just installed brand new N55 mids onto a brand new BMWPE Y-Pipe resonator delete and BMWPE axle-back. The thing crackles a lot and sounds extremely racey however, at the same time it sounds high pitched and raspy at times, especially on cold start where it sounds disgusting. Basically it sounds almost perfect while driving and warm but the rasp...meh so, can sooting up cure this or do I need to put the resonator on the N55 mids?

Do you N55 guys find this with your new BMWPE's? Albeit your stock mids probably have the benefit of a good carbon coating before hand.

This exhaust setup is on an N54 135i by the way.

NORAGRETS · 02-11-2013, 03:27 PM

2500-5000 miles

135Pats · 02-11-2013, 03:31 PM

It took about 2K miles before my Berk mids really settled in, same for my muffler...But with no resonators in place the rasp may not go away.

Cozy · 02-11-2013, 03:47 PM

Wow, that's some time. I'm on stock DPs so I have hope it'll calm down.

Did your Berk Mids sound a little raspy at first?

135Pats · 02-11-2013, 04:24 PM

Quote:

Originally Posted by Cozy

Wow, that's some time. I'm on stock DPs so I have hope it'll calm down.

Did your Berk Mids sound a little raspy at first?

Nope, when I first put them in they actually sounded pretty much identical to the N54 mids they were replacing, after about 50 miles or so they started to open up, but it was probably another month down the road before they really settled into the deep tone they have now. 0 rasp, and they cut down on the drone that had been present with just the meisterschaft muffler previous. IMO if you're going for a "race" axle-back and/or messing with the downpipes, a resonator is a must.

Viral@ActiveAutowerke · 02-11-2013, 04:39 PM

Roughly between 600-1,000 Miles, depends on how heavy your foot is on the throttle.

Freon · 02-11-2013, 04:51 PM

I'd go with zero, or as long as it takes for your ears to get used to it.

Cozy · 02-11-2013, 05:10 PM

I don't think I could ever do a race style exhaust after this

. It's very loud for 'stock' parts.

Rich196 · 04-07-2013, 02:53 PM

Quote:

Originally Posted by Cozy

I don't think I could ever do a race style exhaust after this

. It's very loud for 'stock' parts.

N55 mids, Y pipe and performance rear silencer....... Because race car?

mb135is · 04-07-2013, 03:51 PM

OP - I do not notice high pitched nor raspy sounds from the PE at all.

Cozy · 04-08-2013, 09:52 AM

It's all gone now. I believe it was because I installed N55 pipes from new as well as the new PE and res-deleted. It was all new piping that needed running in which it now has; it sounds better than ever!

christopherkriens · 04-08-2013, 01:25 PM

Zombie1 · 04-08-2013, 03:13 PM

Quote:

Originally Posted by Cozy

It's all gone now. I believe it was because I installed N55 pipes from new as well as the new PE and res-deleted. It was all new piping that needed running in which it now has; it sounds better than ever!

02-11-2013, 03:01 PM	#1
Cozy Major 111 Rep 1,487 Posts Drives: E82 135i Join Date: Mar 2011 Location: Surrey, England iTrader: (0)	Sooting Up How long does it generally take for a new exhaust to soot/carbon up, tune its tone, deepen and lose the rasp? I've just installed brand new N55 mids onto a brand new BMWPE Y-Pipe resonator delete and BMWPE axle-back. The thing crackles a lot and sounds extremely racey however, at the same time it sounds high pitched and raspy at times, especially on cold start where it sounds disgusting. Basically it sounds almost perfect while driving and warm but the rasp...meh so, can sooting up cure this or do I need to put the resonator on the N55 mids? Do you N55 guys find this with your new BMWPE's? Albeit your stock mids probably have the benefit of a good carbon coating before hand. This exhaust setup is on an N54 135i by the way.
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02-11-2013, 03:27 PM	#2
NORAGRETS Colonel 441 Rep 2,034 Posts Drives: 2017 F80 M3 ZCP BSM 2012 E82 1 Join Date: May 2012 Location: Boston, MA iTrader: (0) Garage List 2017 BMW M3 ZCP LCI [0.00]	2500-5000 miles
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02-11-2013, 03:31 PM	#3
135Pats Major General 456 Rep 6,478 Posts Drives: A few BMWs Join Date: May 2012 Location: Maryland iTrader: (3)	It took about 2K miles before my Berk mids really settled in, same for my muffler...But with no resonators in place the rasp may not go away. __________________ E88 N54 Alpinweiss/Coral Red/Motiv HTA 3586r Tial .82AR/Other stuff...652WHP F30 N55 XDrive EBII
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02-11-2013, 03:47 PM	#4
Cozy Major 111 Rep 1,487 Posts Drives: E82 135i Join Date: Mar 2011 Location: Surrey, England iTrader: (0)	Wow, that's some time. I'm on stock DPs so I have hope it'll calm down. Did your Berk Mids sound a little raspy at first?
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02-11-2013, 04:39 PM	#6
Viral@ActiveAutowerke 104 Rep 485 Posts Drives: 1 of a kind ;) Join Date: Jul 2007 Location: Miami, Florida iTrader: (0) Garage List 2008 135i [10.00]	Roughly between 600-1,000 Miles, depends on how heavy your foot is on the throttle.
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02-11-2013, 04:51 PM	#7
Freon Major 81 Rep 1,051 Posts Drives: 2009 135i Join Date: Nov 2007 Location: Indianapolis iTrader: (3)	I'd go with zero, or as long as it takes for your ears to get used to it. __________________ 2009 BMW 135i 6MT Sport, AFE intake, Cobb AP, Apex 18x8.5+9.5, 255/275 PSS
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02-11-2013, 05:10 PM	#8
Cozy Major 111 Rep 1,487 Posts Drives: E82 135i Join Date: Mar 2011 Location: Surrey, England iTrader: (0)	I don't think I could ever do a race style exhaust after this . It's very loud for 'stock' parts.
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04-07-2013, 03:51 PM	#10
mb135is Captain 89 Rep 912 Posts Drives: '13 135is #180/586 Join Date: Sep 2012 Location: NJ iTrader: (0)	OP - I do not notice high pitched nor raspy sounds from the PE at all. __________________ E82 '13 135is - Space Gray/Coral Red, 6 MT, Heated Seats, 50% tint, clear bra, BMW Perf. Grilles, BMW Perf. CF Diffuser - #180/586
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04-08-2013, 09:52 AM	#11
Cozy Major 111 Rep 1,487 Posts Drives: E82 135i Join Date: Mar 2011 Location: Surrey, England iTrader: (0)	It's all gone now. I believe it was because I installed N55 pipes from new as well as the new PE and res-deleted. It was all new piping that needed running in which it now has; it sounds better than ever!
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04-08-2013, 01:25 PM	#12
christopherkriens . 18 Rep 260 Posts Drives: 2011 BMW 135i Coupé Join Date: Dec 2010 Location: Minnesota iTrader: (1) Garage List 2011 BMW 135i [8.62]	__________________ 2011 135i Black Sapphire Metallic / Coral Red
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