New here, looking for advice on exhaust drone

ONE_slow_m5 · 03-23-2015, 02:21 PM

Im new here to the forum but not the to the bmw scene. I have an e90 n54 SG 335i. I have catl$$ downpipes. Completely stock middle's and an DInan free flow exhaust. Sounds okay until 4,000rpm. At 4,000+ it sounds like I'm in a honda. My question is would taking out the rear CATS and installing a pair of 1792 Vibrant resonators help with the drone and make the car sounds better? I absolutely hate the way it sounds now

Izero · 03-23-2015, 03:48 PM

Cats usually quiet exhausts down more than resonators.... maybe you should just install resonators and leave the midepipe cats on there... how often are you driving around at 4k RPM anyways...?

mike@x-ph.com · 03-23-2015, 05:02 PM

Quote:

Originally Posted by Blown_by_TWINS

Im new here to the forum but not the to the bmw scene. I have an e92 n54 SGM 335i. I have catl$$ downpipes. Completely stock middle's and an DInan free flow exhaust. Sounds okay until 4,000rpm. At 4,000+ it sounds like I'm in a honda. My question is would taking out the rear CATS and installing a pair of 1792 Vibrant resonators help with the drone and make the car sounds better? I absolutely hate the way it sounds now

Which downpipes do you have? You should have no drone after 4000 rpm ( most guys notice a drone from 1600 - 2000 rpm only)

ONE_slow_m5 · 03-23-2015, 11:00 PM

Quote:

Originally Posted by Izero

Cats usually quiet exhausts down more than resonators.... maybe you should just install resonators and leave the midepipe cats on there... how often are you driving around at 4k RPM anyways...?

My car screems going in reverse lol hehe always raping it . This is TX shit gets real here every night

Also I'm sorry I don't mean drone I mesn rasp! Lots and lots of rasp . Was thinking I can make it louder removing the rear cats and putting the resonators in place. I want it louder just no rasp .

einbruch10 · 03-23-2015, 11:03 PM

the vibrant resonators will kill the rasp for sure.

ONE_slow_m5 · 03-24-2015, 11:52 AM

Quote:

Originally Posted by einbruch10

the vibrant resonators will kill the rasp for sure.

Thanks I'm going to order a set i think they are 50$ each. And will take out my rear cats and put those in place.

cadenceE92 · 03-24-2015, 04:28 PM

Sorry to thread jack but it seems OP question was answer. I just wanted everyone opinion on the VRSF catless DP and drone. When I was researching (maybe not well enough). All I heard wer glowing reviews of these DP's. And no mention of drone.

They fit wonderful on the n54 but I have to say there is a healthy drone from 2800-3k on my MT 2009 car.

Has anyone experienced this. Is there anyway to quell the drone?

brewnami · 03-24-2015, 04:39 PM

Quote:

Originally Posted by cadenceE92

Sorry to thread jack but it seems OP question was answer. I just wanted everyone opinion on the VRSF catless DP and drone. When I was researching (maybe not well enough). All I heard wer glowing reviews of these DP's. And no mention of drone.

They fit wonderful on the n54 but I have to say there is a healthy drone from 2800-3k on my MT 2009 car.

Has anyone experienced this. Is there anyway to quell the drone?

If you're getting drone on Catless Downpipes alone, there's a problem with your exhaust. No two CATLESS downpipes on this platform will have any noticeable sound variation. It's all just straight pipe and the exact same size.

cadenceE92 · 03-27-2015, 09:06 PM

Interesting.. What could possibly be wrong then? It funny.. cause there is noticeable drone at 28-3000 RPMs. And I also noticed that if I floor it in 5th or 6th gear there seems to be a healthy drone as well. Doesnt do it in the other gear just seems to happen when it is loaded up in 5th and 6th. Can you install these things improperly somehow to cause this? Just doesnt seem obvious to me how that is possible.

Socket · 03-28-2015, 02:01 AM

I think installing an x pipe if you dont already have one may help as the x pipe helps direct the two air streams better when they cross over compared to a H pipe found in most aftermarket exhaust set ups.... or so I have read

Flex68 · 03-28-2015, 02:26 AM

So I'm confused ?? ... Is it a case by case basis ??? As I was planning on just doin down pipes but will that cause drony rasp with the stock exhaust ? As I don't want that lol

Aerotest · 03-28-2015, 09:40 AM

Cobb tuning exhaust here with no cats (race car) and absolutely no drone.

03-23-2015, 02:21 PM	#1
ONE_slow_m5 Lieutenant 136 Rep 461 Posts Drives: 2020 f90 m5 Join Date: Mar 2015 Location: sugarland, TX iTrader: (-1)	New here, looking for advice on exhaust drone Im new here to the forum but not the to the bmw scene. I have an e90 n54 SG 335i. I have catl$$ downpipes. Completely stock middle's and an DInan free flow exhaust. Sounds okay until 4,000rpm. At 4,000+ it sounds like I'm in a honda. My question is would taking out the rear CATS and installing a pair of 1792 Vibrant resonators help with the drone and make the car sounds better? I absolutely hate the way it sounds now Last edited by ONE_slow_m5; 07-02-2015 at 11:02 PM..
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03-23-2015, 03:48 PM	#2
Izero Private First Class 25 Rep 128 Posts Drives: 2008 BMW 335Xi - Alpine White Join Date: Jan 2015 Location: New Jersey iTrader: (0)	Cats usually quiet exhausts down more than resonators.... maybe you should just install resonators and leave the midepipe cats on there... how often are you driving around at 4k RPM anyways...? __________________
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03-23-2015, 11:03 PM	#5
einbruch10 these are the times that try mens soul's 37 Rep 280 Posts Drives: 2008 335i Join Date: Dec 2013 Location: columbus georgia iTrader: (2)	the vibrant resonators will kill the rasp for sure. __________________ 2008 monaco blue 335i sedan STOCK
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03-24-2015, 04:28 PM	#7
cadenceE92 Enlisted Member 1 Rep 35 Posts Drives: 2009 E92 Manual, Silver/Black Join Date: Dec 2014 Location: United States iTrader: (0)	Sorry to thread jack but it seems OP question was answer. I just wanted everyone opinion on the VRSF catless DP and drone. When I was researching (maybe not well enough). All I heard wer glowing reviews of these DP's. And no mention of drone. They fit wonderful on the n54 but I have to say there is a healthy drone from 2800-3k on my MT 2009 car. Has anyone experienced this. Is there anyway to quell the drone?
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03-27-2015, 09:06 PM	#9
cadenceE92 Enlisted Member 1 Rep 35 Posts Drives: 2009 E92 Manual, Silver/Black Join Date: Dec 2014 Location: United States iTrader: (0)	Interesting.. What could possibly be wrong then? It funny.. cause there is noticeable drone at 28-3000 RPMs. And I also noticed that if I floor it in 5th or 6th gear there seems to be a healthy drone as well. Doesnt do it in the other gear just seems to happen when it is loaded up in 5th and 6th. Can you install these things improperly somehow to cause this? Just doesnt seem obvious to me how that is possible.
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03-28-2015, 02:01 AM	#10
Socket Lieutenant General 4701 Rep 11,962 Posts Drives: 335i Join Date: Nov 2014 Location: Australia iTrader: (4) Garage List 2008 BMW E92 [0.00]	I think installing an x pipe if you dont already have one may help as the x pipe helps direct the two air streams better when they cross over compared to a H pipe found in most aftermarket exhaust set ups.... or so I have read
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03-28-2015, 02:26 AM	#11
Flex68 Captain 76 Rep 853 Posts Drives: E92 335i Join Date: Mar 2015 Location: Australia iTrader: (0)	So I'm confused ?? ... Is it a case by case basis ??? As I was planning on just doin down pipes but will that cause drony rasp with the stock exhaust ? As I don't want that lol
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03-28-2015, 09:40 AM	#12
Aerotest First Lieutenant 15 Rep 315 Posts Drives: 2008 E90 335i 6MT Join Date: Aug 2013 Location: Yo mama iTrader: (0)	Cobb tuning exhaust here with no cats (race car) and absolutely no drone.
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