Sorry for the Question!!

Rearro · 10-28-2008, 04:35 PM

I hope not to get bashed over this!!

But what is meant by " Drone " when speaking about exhaust?

SV Concepts III · 10-28-2008, 04:40 PM

Drone has to do with an annoying low resonance sound that happens with some mufflers. This is especially apparent on more aggressive exhausts in a lower RPM range and can be due to a variety of factors including muffler design or mounting issues causing the muffler to vibrate against the chassis or metal underside of the car. This will reverberate through the cabin and not only sound terrible but in some cases can cause headaches.

BMW86 · 10-28-2008, 04:46 PM

It sounds ricer.

Rearro · 10-28-2008, 04:49 PM

So Drone, is the vibration of the muffler,and coming into contact with another part of the car?

crzy4135i · 10-28-2008, 05:02 PM

Quote:

Originally Posted by Rearro

So Drone, is the vibration of the muffler,and comming into contact with another part of the car?

Have you ever been in a tiled bathroom and hummed.. and the sound reverberated through the room at a certain frequency? That's droning.

My audi droned in 6th gear at 70mph with an aftermarket exhaust installed. The aggrevating sound went away if I downshifted to 5th or increased speed up to 75mph. The system had straight through borla mufflers. It sounded great around town and on short trips but the droning got old on long trips.

Rearro · 10-28-2008, 05:06 PM

Yeah!! been in a tiled Bathroom!! so it kinda like an echo..?

crzy4135i · 10-28-2008, 05:11 PM

Quote:

Originally Posted by Rearro

Yeah!! been in a tiled Bathroom!! so it kinda like an echo..?

Yes, the certain frequency range of engine noise hits a resonant frequency in the exhaust and causes it to vibrate.. and it sounds like everything is vibrating, working its way through the entire frame of the car and finally reaching your skull.:biggrin:

Rearro · 10-28-2008, 05:16 PM

Damn!! That sucks when you put it like that!!

I was asking b/c I've been looking at the Cp-e Exhaust ( cat back)
but I also notice some one on here did just mid pipes. Now that I know what drone is I don't want non of it!!

thanks for the explanations

JohnnyTT · 10-28-2008, 05:29 PM

Quote:

Originally Posted by Rearro

Damn!! That sucks when you put it like that!!

I was asking b/c I've been looking at the Cp-e Exhaust ( cat back)
but I also notice some one on here did just mid pipes. Now that I know what drone is I don't want non of it!!

thanks for the explanations

Check around the forums, because I don't think anybody with the CP-e system has complained about any drone.

Also if you have any fear, leave on the cats and just replace the rear of the exhaust.

TakeOne · 10-28-2008, 05:38 PM

Quote:

Originally Posted by Rearro

Damn!! That sucks when you put it like that!!

I was asking b/c I've been looking at the Cp-e Exhaust ( cat back)
but I also notice some one on here did just mid pipes. Now that I know what drone is I don't want non of it!!

thanks for the explanations

Drone, what drone:iono:... CP-E is good stuff

(don't have the muffler though, just the mids) Stealth when i want it, not so much when i'm m o v i n

Chicago1 · 10-28-2008, 11:45 PM

Quote:

Originally Posted by JohnnyTT

Check around the forums, because I don't think anybody with the CP-e system has complained about any drone.

Also if you have any fear, leave on the cats and just replace the rear of the exhaust.

Actually, I had the full cp-e cat-back setup and the drone was enough to give me a headache by the time I got to work every morning. Very sweet sound outside and upper RPM range, but anything under 3k and it was pretty bad inside the cabin. Very low frequency that just works its way inside your skull. I'm pretty sure it was a result of removing the stock resonator, because I eventually got rid of the cp-e mid-pipes and just kept the axle-back and it sounds great, with no drone. (Sorry cp-e... just being honest here - not trying to dissuade anyone from the full setup, but I'm SO glad I put the stock mids back on and just kept axle-back with RR intake)..

Yearofthe1 · 10-29-2008, 12:12 AM

Quote:

Originally Posted by Chicago1

Actually, I had the full cp-e cat-back setup and the drone was enough to give me a headache by the time I got to work every morning. Very sweet sound outside and upper RPM range, but anything under 3k and it was pretty bad inside the cabin. Very low frequency that just works its way inside your skull. I'm pretty sure it was a result of removing the stock resonator, because I eventually got rid of the cp-e mid-pipes and just kept the axle-back and it sounds great, with no drone. (Sorry cp-e... just being honest here - not trying to dissuade anyone from the full setup, but I'm SO glad I put the stock mids back on and just kept axle-back with RR intake)..

cp-e sells a version of their mid pipes with a resonator, though. This is the option I plan on ordering when they finish their DP's. So drone-free is still offered.

Rearro · 10-29-2008, 12:16 AM

Excellent !!!
I'm glad I asked and I'm glad you guys are being honest!!
thanks to all who have responded thus far!!

10-28-2008, 04:35 PM	#1
Rearro Lieutenant 24 Rep 507 Posts Drives: Bmw 135I Join Date: Nov 2007 Location: Silverdale, Wa. iTrader: (0)	Sorry for the Question!! I hope not to get bashed over this!! But what is meant by " Drone " when speaking about exhaust? __________________ 2008 135i,Dinan Stage 2,Dinan Free flow exhaust.
	Appreciate 0 Tweet Quote

10-28-2008, 04:40 PM	#2
SV Concepts III Lieutenant General 375 Rep 17,017 Posts Drives: BMW Duh Join Date: Apr 2005 Location: Santa Clara iTrader: (13)	Drone has to do with an annoying low resonance sound that happens with some mufflers. This is especially apparent on more aggressive exhausts in a lower RPM range and can be due to a variety of factors including muffler design or mounting issues causing the muffler to vibrate against the chassis or metal underside of the car. This will reverberate through the cabin and not only sound terrible but in some cases can cause headaches.
	Appreciate 0 Quote

10-28-2008, 04:46 PM	#3
BMW86 Major General 398 Rep 9,156 Posts Drives: RS3 Sedan / Macan S Join Date: Jul 2008 Location: Australia iTrader: (0)	It sounds ricer.
	Appreciate 0 Quote

10-28-2008, 04:49 PM	#4
Rearro Lieutenant 24 Rep 507 Posts Drives: Bmw 135I Join Date: Nov 2007 Location: Silverdale, Wa. iTrader: (0)	So Drone, is the vibration of the muffler,and coming into contact with another part of the car? __________________ 2008 135i,Dinan Stage 2,Dinan Free flow exhaust.
	Appreciate 0 Quote

10-28-2008, 05:06 PM	#6
Rearro Lieutenant 24 Rep 507 Posts Drives: Bmw 135I Join Date: Nov 2007 Location: Silverdale, Wa. iTrader: (0)	Yeah!! been in a tiled Bathroom!! so it kinda like an echo..? __________________ 2008 135i,Dinan Stage 2,Dinan Free flow exhaust.
	Appreciate 0 Quote

10-28-2008, 05:16 PM	#8
Rearro Lieutenant 24 Rep 507 Posts Drives: Bmw 135I Join Date: Nov 2007 Location: Silverdale, Wa. iTrader: (0)	Damn!! That sucks when you put it like that!! I was asking b/c I've been looking at the Cp-e Exhaust ( cat back) but I also notice some one on here did just mid pipes. Now that I know what drone is I don't want non of it!! thanks for the explanations __________________ 2008 135i,Dinan Stage 2,Dinan Free flow exhaust.
	Appreciate 0 Quote

10-29-2008, 12:16 AM	#13
Rearro Lieutenant 24 Rep 507 Posts Drives: Bmw 135I Join Date: Nov 2007 Location: Silverdale, Wa. iTrader: (0)	Excellent !!! I'm glad I asked and I'm glad you guys are being honest!! thanks to all who have responded thus far!! __________________ 2008 135i,Dinan Stage 2,Dinan Free flow exhaust.
	Appreciate 0 Quote