...closed....

intoflatlines · 08-16-2013, 04:24 PM

Yep. I should run a spectrum analyzer in my car this weekend. Drone is really bad between 2K-3K RPM, whatever range that relates to.

GriffBrew · 08-16-2013, 04:31 PM

Quote:

Originally Posted by inTgr8r

Discussions on drone often head down a few different paths as people often have a different idea of what drone is.

Drone is a high amplitude sinusoidal oscillation of the exhaust gases in the exhaust pipe.

A droning exhaust system works something like a single note pipe organ.
When it hits a certain frequency (e.g. ~125 Hz), it rings out loud and causes what is known as drone.
So the idea of an anti-drone product is to tune in to 'that' frequency and convert that energy to another form to cancel out the drone.

Drone is not just noise or a loud exhaust.

Good explanation.

But wouldn't that mean that each unique combination of header/section1/xpipe/muffler creates a different tone and would (potentially) require a unique anti-drone device to suppress it?

inTgr8r · 08-16-2013, 05:17 PM

Quote:

Originally Posted by GriffBrew

Good explanation.

But wouldn't that mean that each unique combination of header/section1/xpipe/muffler creates a different tone and would (potentially) require a unique anti-drone device to suppress it?

Yes, but rather than unique devices or each, DKF is creating one that is tuneable (adjustable) for different system frequencies.

Devious21 · 08-19-2013, 01:11 PM

Quote:

Originally Posted by Urluz3n

I installed a cat less header on my M Coupe a few weeks ago and then I had Active do a tune on my ECU. Now the drone is killing me! It seems to occurs always around 2000 rpms. I am considering exchanging my Stromung for my oem mufflers. Maybe the drone will ease up. Unless someone has a better idea.

Quote:

Originally Posted by Urluz3n

Just changing out the mufflers doesn't necessarily give you a drone. When I just had my stromung mufflers I had a really good sound with no drone. Once I installed the the headers I got the drone.

I have the exact same experience. Loved my Stromungs. I was worried about rasp with the headers but it's actually the drone that's killing it.

Consider me interested as well. Between this and some foam or dynamat in the rear, maybe I can salvage my current setup.

Devious21 · 08-19-2013, 01:11 PM

Would love to see the drawings/more details on what they are thinking of.

intoflatlines · 08-26-2013, 10:50 AM

Any info/update on this?

inTgr8r · 08-26-2013, 11:02 AM

was wondering the same thing.
DKF was working on some drawings, I'll check with them to see what's happening

inTgr8r · 08-29-2013, 10:06 AM

confirmed.... design drawing is in progress.
I will post it up as soon as its available.

intoflatlines · 08-29-2013, 11:28 AM

Nice! Looking forward to info about this product

intoflatlines · 09-23-2013, 08:53 AM

Update?

inTgr8r · 09-23-2013, 09:21 AM

Had an email the other day; design drawings are being worked on.
I'll get them posted as soon as they're done.
It probably wont happen until the Section 1 GB is all wrapped up.

ajw45 · 10-02-2013, 01:33 AM

In! Loved my RPIs but the drone with headers was crazy. Wish I could get the loud without the drone...

intoflatlines · 10-11-2013, 11:41 AM

Update?

inTgr8r · 10-11-2013, 12:33 PM

They are busy right now wrapping up the section 1 GB.
updates will come

intoflatlines · 11-05-2013, 12:31 PM

Nate4641 · 11-09-2013, 06:29 PM

any updates?

inTgr8r · 11-10-2013, 02:52 PM

Nothing yet......

intoflatlines · 11-20-2013, 03:18 PM

can you at least say if it's gonna be something like a helmholtz (sp?) resonator? Or what the install would involve?

inTgr8r · 11-20-2013, 03:58 PM

No it will not be a helmholtz resonator.
It will be a clamp on device.

intoflatlines · 12-27-2013, 08:32 AM

Update?

ZStig · 12-27-2013, 08:34 AM

Same story I bet, working on the section one debacle. Give him a month

Cybmx · 12-27-2013, 11:28 AM

http://www.silveradosierra.com/exhau...it-t12607.html

I have the RPI and I did something similar to this by welding two J pipes on the X pipe. I will post pictures later. The drone from 2-3k is completely gone!

I did that on a local muffler shop for $200.

View Poll Results: Are you interested in an anti-Drone product?
Have no/little drone; not interested	12	24.00%
Interested in 'Tuneable' anit-drone - @ Budget Cost $200	25	50.00%
Interested in 'Tuneable' anit-drone - but $200 is too much	13	26.00%
Voters: 50. You may not vote on this poll

08-16-2013, 04:24 PM	#23
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)	Yep. I should run a spectrum analyzer in my car this weekend. Drone is really bad between 2K-3K RPM, whatever range that relates to.
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08-19-2013, 01:11 PM	#27
Devious21 Captain 38 Rep 711 Posts Drives: 2006 Z4M Join Date: Mar 2011 Location: SF Bay Area iTrader: (1)	Would love to see the drawings/more details on what they are thinking of. __________________ \|Evolve Airbox - Euro Headers - Strömung Exhaust - H&R Coils - 19" BBS CH-R\|
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08-26-2013, 10:50 AM	#28
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)	Any info/update on this?
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08-26-2013, 11:02 AM	#29
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	was wondering the same thing. DKF was working on some drawings, I'll check with them to see what's happening __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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08-29-2013, 10:06 AM	#30
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	confirmed.... design drawing is in progress. I will post it up as soon as its available. __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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08-29-2013, 11:28 AM	#31
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)	Nice! Looking forward to info about this product
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09-23-2013, 08:53 AM	#32
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)	Update?
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09-23-2013, 09:21 AM	#33
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	Had an email the other day; design drawings are being worked on. I'll get them posted as soon as they're done. It probably wont happen until the Section 1 GB is all wrapped up. __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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10-02-2013, 01:33 AM	#34
ajw45 Private First Class 32 Rep 149 Posts Drives: Z4M Coupe Join Date: Feb 2011 Location: Boston iTrader: (0)	In! Loved my RPIs but the drone with headers was crazy. Wish I could get the loud without the drone...
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10-11-2013, 11:41 AM	#35
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)	Update?
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10-11-2013, 12:33 PM	#36
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	They are busy right now wrapping up the section 1 GB. updates will come __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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11-05-2013, 12:31 PM	#37
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)
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11-09-2013, 06:29 PM	#38
Nate4641 Major 151 Rep 1,134 Posts Drives: '07 M Roadster Join Date: Dec 2011 Location: Warner Robins, GA iTrader: (0) Garage List 2007 BMW Z4 M Roadster [0.00]	any updates? __________________ My build/adventure thread
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11-10-2013, 02:52 PM	#39
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	Nothing yet...... __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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11-20-2013, 03:18 PM	#40
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)	can you at least say if it's gonna be something like a helmholtz (sp?) resonator? Or what the install would involve?
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11-20-2013, 03:58 PM	#41
inTgr8r Lieutenant General 2432 Rep 11,667 Posts Drives: M2 Comp Join Date: Mar 2006 Location: Toronto iTrader: (10)	No it will not be a helmholtz resonator. It will be a clamp on device. __________________ '21 M2C Hockenheim Silver '18 718 Cayman S Lava Orange (sold) '13 E92 M3 Santorini Blue (sold) '07 Z4 M Coupe Alpine White (sold)
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12-27-2013, 08:32 AM	#42
intoflatlines Lieutenant 67 Rep 501 Posts Drives: Z4MR, E34, E30 Join Date: Mar 2013 Location: Chicago iTrader: (0)	Update?
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12-27-2013, 08:34 AM	#43
ZStig instagram 997turbotom 279 Rep 7,377 Posts Drives: Interlagos Z4MR Join Date: Jun 2008 Location: Delray Beach, FL iTrader: (4)	Same story I bet, working on the section one debacle. Give him a month __________________
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12-27-2013, 11:28 AM	#44
Cybmx Private 0 Rep 67 Posts Drives: 06 Z4MR Join Date: Dec 2013 Location: Philadelphia iTrader: (0)	http://www.silveradosierra.com/exhau...it-t12607.html I have the RPI and I did something similar to this by welding two J pipes on the X pipe. I will post pictures later. The drone from 2-3k is completely gone! I did that on a local muffler shop for $200.
	Appreciate 0 Quote