Muffler Delete = Whistle Tips?

TheSt|G · 07-07-2014, 07:21 AM

Quote:

Originally Posted by Kgolf31

Welded

I had a buddy with a project car a few years ago who welded up his own exhaust parts and had a similar whistle. In the end it turned out to be one of his booger welds protruding into the the inside of the pipe which created a whistling sound. Might be worth checking out if you can scope it.

Kgolf31 · 07-08-2014, 02:03 PM

Had the shop take a look.

Installed a single outlet instead of the dual tips and it fixed the issue.

MarkkyyMan · 07-08-2014, 02:10 PM

Could of been the Y pipe in the dual tips. If enough air hit it at just the right angle it could create that noise.

Ankur194 · 07-08-2014, 06:45 PM

Its the tips, they are angled. Its like blowing across a beer bottle. Had the same issue when i had a car with DTM style tips.

MarkkyyMan · 07-08-2014, 07:59 PM

Quote:

Originally Posted by Ankur194

Its the tips, they are angled. Its like blowing across a beer bottle. Had the same issue when i had a car with DTM style tips.

Heh. I know a couple people with DTM tipped exhausts and theirs don't make that noise..

hoki06 · 07-10-2014, 08:39 AM

How is the muffler delete for daily driving? Any drone? I have the 135i muffler installed and while it sounds good, I'd love for it to be a little louder.

Chandon · 07-10-2014, 08:46 AM

Quote:

Originally Posted by hoki06

How is the muffler delete for daily driving? Any drone? I have the 135i muffler installed and while it sounds good, I'd love for it to be a little louder.

Resonator delete

*Sorry

hoki06 · 07-10-2014, 09:44 AM

Quote:

Originally Posted by viciousgook

Resonator delete

*Sorry

My question was aimed at the OP in regards to his muffler delete. I'm leaving the resonator since I've heard that gives a rasp tone which I don't want.

Chandon · 07-10-2014, 10:05 AM

Quote:

Originally Posted by hoki06

My question was aimed at the OP in regards to his muffler delete. I'm leaving the resonator since I've heard that gives a rasp tone which I don't want.

I'd assume removing any sort of silencer will give you rasp regardless, it is a BMW I6 at the end of the day.
I would much rather have nice sounding rasp than horrible drone from a muffler delete, not meaning any offence here.

Kgolf31 · 07-10-2014, 10:05 AM

Quote:

Originally Posted by hoki06

My question was aimed at the OP in regards to his muffler delete. I'm leaving the resonator since I've heard that gives a rasp tone which I don't want.

It has no drone unless you bog the engine below 2k. At that point though you should be downshifting. There is some sound on acceleration, but once you get off the throttle it is nice and quiet.

My Z4M w/Rogue El Diablo Exhaust Cans are much louder than this muffler delete still...

hoki06 · 07-10-2014, 12:30 PM

Quote:

Originally Posted by Kgolf31

It has no drone unless you bog the engine below 2k. At that point though you should be downshifting. There is some sound on acceleration, but once you get off the throttle it is nice and quiet.

My Z4M w/Rogue El Diablo Exhaust Cans are much louder than this muffler delete still...

Hearing this I'm even more tempted to try it. Worst case is I'll just put the muffler back on.

Kgolf31 · 07-10-2014, 02:57 PM

Quote:

Originally Posted by hoki06

Hearing this I'm even more tempted to try it. Worst case is I'll just put the muffler back on.

I can try to get some interior video if that helps?

Trust me, the drone is literally nothing. My Z4M drones unload heavy load and it wants to shake my head apart.

Muffler delete is nothing.

hoki06 · 07-11-2014, 07:48 AM

Quote:

Originally Posted by Kgolf31

I can try to get some interior video if that helps?

Trust me, the drone is literally nothing. My Z4M drones unload heavy load and it wants to shake my head apart.

Muffler delete is nothing.

Videos would be nice. I've seen one video of a muffler delete but another can't hurt.

I just don't want it to drone or be obnoxiously loud which I think is neither.

Kgolf31 · 07-11-2014, 08:13 AM

Quote:

Originally Posted by hoki06

Videos would be nice. I've seen one video of a muffler delete but another can't hurt.

I just don't want it to drone or be obnoxiously loud which I think is neither.

You won't get that. The cabin is pretty silent and rejects the sound pretty good.

It isn't like a Z4M Coupe where the trunk is open to the cabin.

My car is going on a Dyno tomorrow, I'll try to get a video then and when I'm driving it

hoki06 · 07-11-2014, 08:22 AM

Quote:

Originally Posted by Kgolf31

You won't get that. The cabin is pretty silent and rejects the sound pretty good.

It isn't like a Z4M Coupe where the trunk is open to the cabin.

My car is going on a Dyno tomorrow, I'll try to get a video then and when I'm diving it

Thanks! I'm very interested to see what kind of power your car puts down.

E82.Love · 08-12-2014, 02:53 AM

Quote:

Originally Posted by Kgolf31

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?

Stock 128 pipes are 2.5". I know mine was. I made my pipes 3" and it gives a nice roaring sound to it. I suggest going with bigger piping so it doesn't suffocate your engine IMO

chris82 · 09-11-2014, 07:53 AM

Quote:

Originally Posted by Kgolf31

You won't get that. The cabin is pretty silent and rejects the sound pretty good.

It isn't like a Z4M Coupe where the trunk is open to the cabin.

My car is going on a Dyno tomorrow, I'll try to get a video then and when I'm driving it

Where's the video? I'm very interested!

Kgolf31 · 09-15-2014, 08:19 AM

Quote:

Originally Posted by Chrisar82

Where's the video? I'm very interested!

I got video when it was on the dyno but somehow it was corrupted and I couldn't play it back

I tried to strap a Go-Pro to the back of my car, but it doesn't really capture the sound too well. I'll see if I can get something else done.

I can say this, it is still more quiet than my Z4M with El Diablo exhausts, it really isn't loud at all

cesarortiz23 · 02-04-2017, 11:31 PM

do you have a picture of your single exhaust tip..

I'm thinking of doing some modification to the exhaust but i don't want that woooppp wooooppp sound lol

OneTwenty8i · 07-05-2017, 05:19 AM

Does the muffler delete make the car sound raspy at all? I'm interested in removing my muffler.

desertman123 · 07-20-2017, 11:27 AM

Quote:

Originally Posted by hoki06

How is the muffler delete for daily driving? Any drone? I have the 135i muffler installed and while it sounds good, I'd love for it to be a little louder.

I have stock headers, secondary cats, resonator but I deleted the muffler.

The tone and volume are fantastic! Zero drone whatsoever, highway cruising is perfectly manageable. It is louder when you're going slower (obviously) but not obnoxiously so.

The volume is so manageable that my luxury-oriented mom doesn't mind it.

I'm actually afraid for the day I get AA headers, because I don't want to re-tune the exhaust.

edit: aaaaaaaaaaand I just realized I replied to a 3 year old comment. Whoops.

Quote:

Originally Posted by OneTwenty8i

Does the muffler delete make the car sound raspy at all? I'm interested in removing my muffler.

Not really, the tone is quite nice.

Made an improved muffler delete vid with some of my boss' equipment (1080p 60fps camera with a suction cup mount)

07-08-2014, 02:03 PM	#24
Kgolf31 Brigadier General 459 Rep 4,531 Posts Drives: 2007 Z4MC, 2012 128i Join Date: Sep 2008 Location: Ohio iTrader: (4)	Had the shop take a look. Installed a single outlet instead of the dual tips and it fixed the issue.
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07-08-2014, 02:10 PM	#25
MarkkyyMan Captain 38 Rep 701 Posts Drives: 2010 BMW 128i Join Date: Dec 2009 Location: Indiana, U.S. iTrader: (0)	Could of been the Y pipe in the dual tips. If enough air hit it at just the right angle it could create that noise.
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07-08-2014, 06:45 PM	#26
Ankur194 Private First Class 8 Rep 111 Posts Drives: One Two Eight Vert Join Date: Mar 2014 Location: Menifee iTrader: (0)	Its the tips, they are angled. Its like blowing across a beer bottle. Had the same issue when i had a car with DTM style tips.
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07-10-2014, 08:39 AM	#28
hoki06 Lieutenant 229 Rep 457 Posts Drives: 2010 BMW 128i Join Date: Jun 2013 Location: VA iTrader: (2)	How is the muffler delete for daily driving? Any drone? I have the 135i muffler installed and while it sounds good, I'd love for it to be a little louder.
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02-04-2017, 11:31 PM	#41
cesarortiz23 Major 325 Rep 1,170 Posts Drives: bmw m2 lci Join Date: Feb 2014 Location: pasadena iTrader: (1)	do you have a picture of your single exhaust tip.. I'm thinking of doing some modification to the exhaust but i don't want that woooppp wooooppp sound lol
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07-05-2017, 05:19 AM	#42
OneTwenty8i Private First Class 34 Rep 166 Posts Drives: 2013 128i Join Date: Jul 2017 Location: East Bay iTrader: (0)	Does the muffler delete make the car sound raspy at all? I'm interested in removing my muffler.
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