Muffler Delete = Whistle Tips?

Kgolf31 · 07-04-2014, 10:54 AM

I'm so confused WTF is going on...lol

So, I got my muffler delete and a pipe fabricated in place. The welds are awesome and the work is top notch.

It is a 2.5" pipe going to exhaust tips that are dual, 2" ID pipes.

However, under full load acceleration I get this.

Thoughts? So I just need to go to a single outlet in this case?

Whistle happens above 6k.

kobeballer96 · 07-04-2014, 03:18 PM

lol thats funny

Riley1524 · 07-04-2014, 04:27 PM

Wow! Not sure but whatever the case that needs to be redone. Maybe take it back and see if the shop can figure it out.

MarkkyyMan · 07-04-2014, 04:56 PM

Whistle tips - Oakland News:

N88888_dawg · 07-04-2014, 05:24 PM

Hhahahahhaa

mechavore884 · 07-04-2014, 06:47 PM

HAHAHAHAHAHAHAHAHA +1 Markky

Kgolf31 · 07-04-2014, 07:42 PM

Thanks for the help guys. Really like the comments so I know how to fix this...

andrey_gta · 07-04-2014, 07:52 PM

Wooo Woooo

Try JB weld on the welds - its suppose to handle 300C deg

Otherwise try Oval Tip

Or add material in between the Y to make the separation longer. Experiment with Ply wood...?

Wakka · 07-04-2014, 11:01 PM

put your muffler back on...

Dackelone · 07-05-2014, 02:41 AM

2" ID pipes is way too small. That's what causing your whistle. Isn't stock 128i exhaust 2.5 inches ?

I know on my 135i the exhaust is 68mm to 73mm thats about 2.7 inches.

Chandon · 07-05-2014, 02:57 AM

Quote:

Originally Posted by Dackelone

2" ID pipes is way too small. That's what causing your whistle. Isn't stock 128i exhaust 2.5 inches ?

I know on my 135i the exhaust is 68mm to 73mm thats about 2.7 inches.

+1 pipes too small

Kgolf31 · 07-05-2014, 07:50 AM

Quote:

Originally Posted by Dackelone

2" ID pipes is way too small. That's what causing your whistle. Isn't stock 128i exhaust 2.5 inches ?

I know on my 135i the exhaust is 68mm to 73mm thats about 2.7 inches.

Okay well I re-measured and it is actually 2.25" (the OD is 3")

This matches up the same with OEM Tips, which now begs the question...what changed?

Blacksport · 07-05-2014, 10:19 AM

The tips or pipe are picking up some sonic vibrations....can't tell, but do the tips have outer heat shields? Also, if your straight pipe is stainless, this could be the cause....I used a fairly heavy aluminized steel pipe and shielded dual tips.

Iron Man · 07-05-2014, 12:01 PM

Quote:

Originally Posted by Blacksport

The tips or pipe are picking up some sonic vibrations....can't tell, but do the tips have outer heat shields? Also, if your straight pipe is stainless, this could be the cause....I used a fairly heavy aluminized steel pipe and shielded dual tips.

Are you saying the sound dampening/vibrations characteristics are better with plain carbon steel compared to stainless steel? Or are you saying you used a thicker walled steel pipe versus a thinner walled stainless pipe?

TheSt|G · 07-05-2014, 12:42 PM

How are the new pipes connected?

Taskmaster · 07-05-2014, 02:14 PM

Single exhaust guys...

Blacksport · 07-05-2014, 03:42 PM

Quote:

Originally Posted by Iron Man

Are you saying the sound dampening/vibrations characteristics are better with plain carbon steel compared to stainless steel? Or are you saying you used a thicker walled steel pipe versus a thinner walled stainless pipe?

I don't know what pipe he's using....but I'm using very sturdy aluminized steel and tips that have heat shields, and mine sounds like his without the whistling.....

Back in my IMSA RX-7 days, we used headers that were 1/4" thick...anything less would eventually crack from fatigue....we were sure it was from sonic vibrations....Mazda's competition director confirmed this.

Iron Man · 07-05-2014, 07:47 PM

Quote:

Originally Posted by Blacksport

I don't know what pipe he's using....but I'm using very sturdy aluminized steel and tips that have heat shields, and mine sounds like his without the whistling.....

Back in my IMSA RX-7 days, we used headers that were 1/4" thick...anything less would eventually crack from fatigue....we were sure it was from sonic vibrations....Mazda's competition director confirmed this.

I understand what you are saying now, since it was confusing me before. Thicker walled pipe, regardless of being stainless or aluminized plain carbon steel, is most likely the solution, if you have the same set-up and not the same problem.

MarkkyyMan · 07-06-2014, 01:49 AM

Quote:

Originally Posted by Kgolf31

Okay well I re-measured and it is actually 2.25" (the OD is 3")

This matches up the same with OEM Tips, which now begs the question...what changed?

I know you said the welds looked solid but have you checked at all for exhaust leaks? They can still occur even with some of the best welds.

You can just mix a little soap and water in a spray bottle then spray the newer welds. After you start the car go back and check for bubbles.

Joeyb7 · 07-06-2014, 10:35 AM

"It's all about the decoration". - Lil' sis.

NickyC · 07-06-2014, 01:06 PM

Funny but true story about Bubb Rubb. I used to be a member on a So Cal car enthusiast site, and when this video became all the internet rage, one of the board members actually tracked down Bubb Rubb with the intention to market him. They started off selling T-shirts with Bubb Rubb making that face with the "whoo whoo". According to him, they were doing pretty well for a bit, but then Bubb Rubb got the idea that the board member was taking too much money, and ripping Bubb off. Bubb demanded a higher portion of the profits (we're talking about T-shirts here people), and since the board member was operating on a razor thin budget regardless, him and Bubb had to part ways.

Oh what could have been!

Kgolf31 · 07-06-2014, 05:03 PM

Quote:

Originally Posted by Blacksport

The tips or pipe are picking up some sonic vibrations....can't tell, but do the tips have outer heat shields? Also, if your straight pipe is stainless, this could be the cause....I used a fairly heavy aluminized steel pipe and shielded dual tips.

Yea, I guess you can call it an outer heat shield.

Tips look just like this basically:

Yes, the pipe is stainless steel.

Quote:

Originally Posted by TheSt|G

How are the new pipes connected?

Welded

07-04-2014, 10:54 AM	#1
Kgolf31 Brigadier General 459 Rep 4,531 Posts Drives: 2007 Z4MC, 2012 128i Join Date: Sep 2008 Location: Ohio iTrader: (4)	Muffler Delete = Whistle Tips? I'm so confused WTF is going on...lol So, I got my muffler delete and a pipe fabricated in place. The welds are awesome and the work is top notch. It is a 2.5" pipe going to exhaust tips that are dual, 2" ID pipes. However, under full load acceleration I get this. Thoughts? So I just need to go to a single outlet in this case? Whistle happens above 6k.
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07-04-2014, 03:18 PM	#2
kobeballer96 Major 175 Rep 1,491 Posts Drives: 6SPD E82 Join Date: May 2013 Location: North Carolina iTrader: (4)	lol thats funny
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07-04-2014, 04:27 PM	#3
Riley1524 Captain 63 Rep 638 Posts Drives: A Slow Ass BMW Join Date: Feb 2011 Location: Atlanta, Ga. iTrader: (4)	Wow! Not sure but whatever the case that needs to be redone. Maybe take it back and see if the shop can figure it out.
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07-04-2014, 04:56 PM	#4
MarkkyyMan Captain 38 Rep 701 Posts Drives: 2010 BMW 128i Join Date: Dec 2009 Location: Indiana, U.S. iTrader: (0)	Whistle tips - Oakland News:
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07-04-2014, 05:24 PM	#5
N88888_dawg Private First Class 8 Rep 166 Posts Drives: none Join Date: Feb 2014 Location: UK iTrader: (1) Garage List 2008 BMW 135i [0.00]	Hhahahahhaa
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07-04-2014, 06:47 PM	#6
mechavore884 Lieutenant 35 Rep 528 Posts Drives: the fat mobile Join Date: May 2013 Location: NOVA iTrader: (3)	HAHAHAHAHAHAHAHAHA +1 Markky
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07-04-2014, 07:42 PM	#7
Kgolf31 Brigadier General 459 Rep 4,531 Posts Drives: 2007 Z4MC, 2012 128i Join Date: Sep 2008 Location: Ohio iTrader: (4)	Thanks for the help guys. Really like the comments so I know how to fix this...
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07-04-2014, 07:52 PM	#8
andrey_gta Brigadier General 298 Rep 4,040 Posts Drives: 130i coupé ;) Join Date: Nov 2011 Location: Bimmerpost iTrader: (1) Garage List 2008 BMW 128i [10.00]	Wooo Woooo Try JB weld on the welds - its suppose to handle 300C deg Otherwise try Oval Tip Or add material in between the Y to make the separation longer. Experiment with Ply wood...? __________________ 128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff "The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is Last edited by andrey_gta; 07-04-2014 at 10:22 PM..
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07-05-2014, 02:41 AM	#10
Dackelone European Editor 10532 Rep 22,992 Posts Drives: N54 e82 Join Date: Feb 2010 Location: Bayern, Germany iTrader: (1)	2" ID pipes is way too small. That's what causing your whistle. Isn't stock 128i exhaust 2.5 inches ? I know on my 135i the exhaust is 68mm to 73mm thats about 2.7 inches. __________________ Dackel's European Delivery Museum Guide
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07-05-2014, 10:19 AM	#13
Blacksport Second Lieutenant 54 Rep 246 Posts Drives: 2013 128i Join Date: Oct 2013 Location: Ft Lauderdale iTrader: (0)	The tips or pipe are picking up some sonic vibrations....can't tell, but do the tips have outer heat shields? Also, if your straight pipe is stainless, this could be the cause....I used a fairly heavy aluminized steel pipe and shielded dual tips. __________________ '13 128i 6sp, '19 Cherokee Ltd 3.2, '17 Ducati SuperSport S *Gone But Not Forgotten:* 74 Z28, 77 Datsun 280Z (1st 5sp in US), 92 Nissan 300ZTT, 94 MB SL600 V12, 01 M Roadster, 66 Yamaha TwinJet 100, 70 Suzuki X6 Hustler *Race:* GP/FP Spitfire SCCA, Merlyn FF SCCA, Mazda RX7 IMSA GTU, Yamaha FZR 400 AMA.
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07-05-2014, 12:42 PM	#15
TheSt\|G Resident Tamed Racing Driver 298 Rep 4,697 Posts Drives: 911, 130is, E39 M5, E36 M3 Join Date: Mar 2008 Location: Outside Philly iTrader: (2)	How are the new pipes connected? __________________ 2005 E46 M3 Interlagos/Cinnamon with Sunroof Delete
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07-05-2014, 02:14 PM	#16
Taskmaster Banned 2465 Rep 9,004 Posts Drives: M235i 6MT / E92 328 Msport 6MT Join Date: Nov 2013 Location: Florida iTrader: (6)	Single exhaust guys...
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07-06-2014, 10:35 AM	#20
Joeyb7 Private First Class 8 Rep 139 Posts Drives: 2011 135i M Sport - AW Join Date: Dec 2012 Location: South Boston iTrader: (0)	"It's all about the decoration". - Lil' sis.
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07-06-2014, 01:06 PM	#21
NickyC Lieutenant General 17460 Rep 10,657 Posts Drives: M4 CS. Former G82, x2 F82, F80 Join Date: Nov 2010 Location: Jacked out of my mind iTrader: (23)	Funny but true story about Bubb Rubb. I used to be a member on a So Cal car enthusiast site, and when this video became all the internet rage, one of the board members actually tracked down Bubb Rubb with the intention to market him. They started off selling T-shirts with Bubb Rubb making that face with the "whoo whoo". According to him, they were doing pretty well for a bit, but then Bubb Rubb got the idea that the board member was taking too much money, and ripping Bubb off. Bubb demanded a higher portion of the profits (we're talking about T-shirts here people), and since the board member was operating on a razor thin budget regardless, him and Bubb had to part ways. Oh what could have been!
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