Akra Evo Drone?

dadealus · 10-25-2012, 09:43 PM

Installed the Akrapovic Evolution exhaust. I heard this system has little to no drone. Yet at 2k and at 3k RPMs I am getting seriously hardcore brain humming drone. any ideas?

The video doesn't really capture how much the drone dominates the cabin but you can kind of hear the difference.

you can even hear where the drone disappears once the revs drop below 2800ish

BMRLVR · 10-25-2012, 09:55 PM

Quote:

Originally Posted by dadealus

Installed the Akrapovic Evolution exhaust. I heard this system has little to no drone. Yet at 2k and at 3k RPMs I am getting seriously hardcore brain humming drone. any ideas?

The Akrapovic Evolution is one of the mildest full systems made for the E9X M3. Sound levels are a subjective thing so you may be a person who has a sensitive ear to volume. You may have to go back to the stock system because I doubt that you are going to find a quieter full system.

onnex · 10-25-2012, 10:00 PM

yeaa, if you think the evo has bad drone.. then I dunno what to say. It's for sure one of the more mild systems– maybe just an axel back is the route for you.

dadealus · 10-25-2012, 10:02 PM

Quote:

Originally Posted by BMRLVR

The Akrapovic Evolution is one of the mildest full systems made for the E9X M3. Sound levels are a subjective thing so you may be a person who has a sensitive ear to volume. You may have to go back to the stock system because I doubt that you are going to find a quieter full system.

I have no problem with the sound levels of the system from 2100-2800 and from 3100-8700. yet when the car settles into the 2k and 3k ranges it produces a sound in the cabin when the windows are up that drills right into your skull. even when the radio is up at about 70% volume you can still feel this overwhelming hum. unfortunately when driving at 80MPH on the highway (3krpm on auto) and 55mph on the side roads (2krpm on auto) driving the car becomes a complete annoyance not because of volume, but a mind drilling hum.

aus · 10-25-2012, 10:41 PM

Either you're way to sensitive or something is wrong with the install. It's not loud at all inside the cabin. It's pretty loud outside when the engine is cold.

Try a race exhaust and then you'll see what drone is.

TheDeliverator · 10-25-2012, 10:47 PM

I'd suggest attempting to find another M3 in VA equipped with same setup and a ride in the passenger seat. If you do not hear the same level of drone, you will know the issue is specific to your system\install.

Rshane · 10-25-2012, 11:07 PM

Dumb question, but are you sure you got the Akra Evolution system and not the Akra GT4?

F16RCE · 10-26-2012, 02:38 AM

My Akra evo ystem definetly doesnt drone at all. Had it for 14 months and my only complaint is lack of volume when not under hard thottle... Get it checked out...

slicer · 10-26-2012, 02:53 AM

I would call myself sensitive to drone and I have not considered Akra Evo to be "droney". It's not stock quiet and I can't hear any drone in your video. As others have said it's subjective and you should try and find another car with the same system to determine if yours is out of the ordinary. Best of luck.

BLACK OPS · 10-26-2012, 04:08 AM

Could this be that you're breaking in both the car and exhaust at same time? I would expect the exhaust to get louder even as you break it in.

dadealus · 10-26-2012, 06:29 AM

Quote:

Originally Posted by BLACK OPS

Could this be that you're breaking in both the car and exhaust at same time? I would expect the exhaust to get louder even as you break it in.

The car is approaching 2k miles already. the exhaust was installed at 500 miles. The Evo system was purchased used from a forum member listed as only having 6000 miles. I met up with him (he also had a supercharger) and the system was removed from his car and swapped over to mine. One thing to note about the install the mechanic said that he would have to use new clamps due to an issue with the old clamps

he said they would perform the same way. I will post a picture of the said clams and connections. The car also was flashed with the ESS tune(Akra Evo+cold start delete) at 1400 miles (2 hours after its first service

) The 2k and 3k drone have been a constant since the Evo install.

THE TECH · 10-26-2012, 07:54 AM

^That's definitely the Evo. Like others have said, you must be sensitive to sound as the Akra is the least droning, full exhaust system that you can buy.

w00tw00t · 10-26-2012, 08:09 AM

dibs if you ever want to sell your Akra Evo !!

Grail05 · 10-26-2012, 08:10 AM

I am assuming you bought this exhaust used? didnt read your entire post but this bothered me ( THE COUPLING THAT IS HOLDING THE EXHAUST IS NOT THE ONE THAT CAME WITH IT. ) maybe im just being picky... anyways. AKRA has the least drone of all exhaust. and if thats loud for you stock is the only way ...

but anyways good luck. i Had installed my Akra for 2 years now and barely just broke it in... for the last 2 months, it had increased at least 20% in noise... i am currently running a slip on but had a not cat non res pipe before and that was crazy.... just wasnt drivable... well for me anyways. I also had the 200cat and a resonator and that was perfect.. which is the EVO version...

aus · 10-26-2012, 09:14 AM

It's probably the clamps but find another car and go for a ride.

Merlosso · 10-27-2012, 09:22 AM

Stop driving in auto and select a different gear, maybe?

m3an · 10-27-2012, 09:28 AM

Quote:

Originally Posted by aus

It's probably the clamps but find another car and go for a ride.

You're kidding right?

aus · 10-27-2012, 01:40 PM

It's the only non-stock piece he has on the system if it's installed right.
What's your brilliant conclusion?

sleepless · 10-28-2012, 01:49 PM

My guess is that the OP is sensitive to the frequency, like I am. For me, even the stock exhaust drones a bit at those RPMs. I can tolerate very few exhaust systems

truths2k05 · 10-28-2012, 01:56 PM

Make sure the clamps are fully tightened, and not making contact with body or each other.

burakkose · 11-25-2012, 08:24 AM

Evo system drones for sure. You can also be happy with the slip on exhaust !

Longboarder · 11-25-2012, 08:33 AM

I have the Akra slip but its coupled with a catless x-pipe. It has a "bassy drone" (not sure if it's drone or just base) also but at different RPM's...below 1,500 and also between 2,000 and 2,500. My base/drone is louder than yours and I'm also sensitive to the loud exhast noize but I like the extra power it provides so I just find myself up-shifting at around 4,000 RPM (at least

) so no bassy drone!!

10-25-2012, 09:43 PM	#1
dadealus Second Lieutenant 21 Rep 228 Posts Drives: 13'E92 M3 Join Date: Jan 2012 Location: Atlanta Ga iTrader: (0)	Akra Evo Drone? Installed the Akrapovic Evolution exhaust. I heard this system has little to no drone. Yet at 2k and at 3k RPMs I am getting seriously hardcore brain humming drone. any ideas? The video doesn't really capture how much the drone dominates the cabin but you can kind of hear the difference. you can even hear where the drone disappears once the revs drop below 2800ish Last edited by dadealus; 10-25-2012 at 09:57 PM..
	Appreciate 0 Tweet Quote

10-25-2012, 10:00 PM	#3
onnex Major 162 Rep 1,169 Posts Drives: 2015 F80 M3 Join Date: May 2010 Location: Palo Alto, CA iTrader: (16) Garage List 2011 E92 M3 [9.26]	yeaa, if you think the evo has bad drone.. then I dunno what to say. It's for sure one of the more mild systems– maybe just an axel back is the route for you. __________________ 2015 MG F80 M3 \| H & R Sport Springs \| M Performance Diffuser \| 20" DPE SP-SC 5 \| IND Matte Black Cosmetic Package \| *More coming soon*
	Appreciate 0 Quote

10-25-2012, 10:41 PM	#5
aus Major General 892 Rep 9,032 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	Either you're way to sensitive or something is wrong with the install. It's not loud at all inside the cabin. It's pretty loud outside when the engine is cold. Try a race exhaust and then you'll see what drone is. __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
	Appreciate 0 Quote

10-25-2012, 10:47 PM	#6
TheDeliverator First Lieutenant 11 Rep 393 Posts Drives: A Singularity Join Date: Mar 2012 Location: MD iTrader: (1) Garage List 2013 BMW M3 [0.00]	I'd suggest attempting to find another M3 in VA equipped with same setup and a ride in the passenger seat. If you do not hear the same level of drone, you will know the issue is specific to your system\install.
	Appreciate 0 Quote

10-25-2012, 11:07 PM	#7
Rshane M-Flight Member 38 Rep 1,085 Posts Drives: 2011 E92 M3 Join Date: Jul 2010 Location: San Antonio, Texas iTrader: (0)	Dumb question, but are you sure you got the Akra Evolution system and not the Akra GT4? __________________ 2011 Le Mans Blue M3// Black extended Novillo w/ Blue Grey Aluminum trim/DCT/ZTP/ZCW/ZPP/ZCP Premium Sound ///Akrapovic Evolution Exhaust 2015 Audi S4 Prestige, Brilliant Black S-tronic 2012 Le Mans Blue 135i M Pkg DCT
	Appreciate 0 Quote

10-26-2012, 02:38 AM	#8
F16RCE First Lieutenant 84 Rep 307 Posts Drives: Soon to be M4 Join Date: May 2012 Location: Delaware, USA iTrader: (0)	My Akra evo ystem definetly doesnt drone at all. Had it for 14 months and my only complaint is lack of volume when not under hard thottle... Get it checked out...
	Appreciate 0 Quote

10-26-2012, 02:53 AM	#9
slicer Major General 2739 Rep 6,734 Posts Drives: 'E46 M3 Race Car, '23 X7 Join Date: Jan 2009 Location: Wisconsin - Instagram - @slicer_m iTrader: (39)	I would call myself sensitive to drone and I have not considered Akra Evo to be "droney". It's not stock quiet and I can't hear any drone in your video. As others have said it's subjective and you should try and find another car with the same system to determine if yours is out of the ordinary. Best of luck. __________________ '23 X7 '04 M3 - Fall Line Motorsports Built Race Car - S65 swap, Dry Sump, Bosch Stand-Alone ECU, Drenth Sequential Trans, MCS 3-Way, Flossmann Wide Body, Brembo Motorsports Brakes, Drexler LSD, BBS E88 Etc. INSTAGRAM - @Slicer_M
	Appreciate 0 Quote

10-26-2012, 04:08 AM	#10
BLACK OPS Major 109 Rep 1,102 Posts Drives: E92 M3 6MT Join Date: Sep 2011 Location: CO, USA iTrader: (1)	Could this be that you're breaking in both the car and exhaust at same time? I would expect the exhaust to get louder even as you break it in. __________________ 2011.75 Jet Black E92 ///M3: ZCP\|6MT\|FR\|EVOLVE 600 SUPERCHARGER\|DINAN\|BBS\|VORSTEINER\|BMW PERFORMANCE\|IND EDITION\|TMS\|LUX 5K\|
	Appreciate 0 Quote

10-26-2012, 07:54 AM	#12
THE TECH BimmerPost Supporting Vendor 307 Rep 13,093 Posts Drives: BPMsport 2012 E92 M3 Join Date: Jun 2011 Location: Kansas iTrader: (45) Garage List 2013 Nissan GTR [0.00] 2019 Sierra Denali ... [0.00] 1999 Nissan Silvia [0.00] 1999 Nissan Skyline ... [0.00] 1998 Toyota Supra [0.00]	^That's definitely the Evo. Like others have said, you must be sensitive to sound as the Akra is the least droning, full exhaust system that you can buy.
	Appreciate 0 Quote

10-26-2012, 08:09 AM	#13
w00tw00t Colonel 408 Rep 2,171 Posts Drives: 2016 MW M4 Join Date: Oct 2010 Location: San Jose, CA iTrader: (13)	dibs if you ever want to sell your Akra Evo !!
	Appreciate 0 Quote

10-26-2012, 08:10 AM	#14
Grail05 Putcha ang ganda... 281 Rep 5,441 Posts Drives: 17 F82 M4 Join Date: Feb 2010 Location: Los Angeles, Brea CA. iTrader: (10)	I am assuming you bought this exhaust used? didnt read your entire post but this bothered me ( THE COUPLING THAT IS HOLDING THE EXHAUST IS NOT THE ONE THAT CAME WITH IT. ) maybe im just being picky... anyways. AKRA has the least drone of all exhaust. and if thats loud for you stock is the only way ... but anyways good luck. i Had installed my Akra for 2 years now and barely just broke it in... for the last 2 months, it had increased at least 20% in noise... i am currently running a slip on but had a not cat non res pipe before and that was crazy.... just wasnt drivable... well for me anyways. I also had the 200cat and a resonator and that was perfect.. which is the EVO version... __________________
	Appreciate 0 Quote

10-26-2012, 09:14 AM	#15
aus Major General 892 Rep 9,032 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	It's probably the clamps but find another car and go for a ride. __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
	Appreciate 0 Quote

10-27-2012, 09:22 AM	#16
Merlosso Banned 24 Rep 495 Posts Drives: Results Join Date: Mar 2011 Location: Germantown, MD iTrader: (2)	Stop driving in auto and select a different gear, maybe?
	Appreciate 0 Quote

10-27-2012, 01:40 PM	#18
aus Major General 892 Rep 9,032 Posts Drives: Odysse Join Date: Jul 2005 Location: Seal Beach, CA iTrader: (10)	It's the only non-stock piece he has on the system if it's installed right. What's your brilliant conclusion? __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
	Appreciate 0 Quote

10-28-2012, 01:49 PM	#19
sleepless Private First Class 10 Rep 118 Posts Drives: 11 E90 M3 Join Date: Jan 2008 Location: Redmond, WA iTrader: (0)	My guess is that the OP is sensitive to the frequency, like I am. For me, even the stock exhaust drones a bit at those RPMs. I can tolerate very few exhaust systems
	Appreciate 0 Quote

10-28-2012, 01:56 PM	#20
truths2k05 Banned 3 Rep 184 Posts Drives: 11 M3 6 SPD, 12 135i PPK DCT Join Date: Nov 2010 Location: Palm Trees And Sun iTrader: (0)	Make sure the clamps are fully tightened, and not making contact with body or each other.
	Appreciate 0 Quote

11-25-2012, 08:24 AM	#21
burakkose Second Lieutenant 9 Rep 224 Posts Drives: i8 Join Date: Nov 2010 Location: Istanbul iTrader: (0)	Evo system drones for sure. You can also be happy with the slip on exhaust ! __________________ I ///M Back ! www.twitter.com/verykingman
	Appreciate 0 Quote

11-25-2012, 08:33 AM	#22
Longboarder Major General 3431 Rep 6,771 Posts Drives: 2016 BMW i8 Join Date: Dec 2006 Location: Monarch Beach iTrader: (1) Garage List 2012 BMW e92 M3 [0.00] 2021 BMW X5M [10.00] 2015 Porsche 991 Tu ... [10.00] 2015 Porsche 991 GT3 [10.00]	I have the Akra slip but its coupled with a catless x-pipe. It has a "bassy drone" (not sure if it's drone or just base) also but at different RPM's...below 1,500 and also between 2,000 and 2,500. My base/drone is louder than yours and I'm also sensitive to the loud exhast noize but I like the extra power it provides so I just find myself up-shifting at around 4,000 RPM (at least ) so no bassy drone!! __________________ Current BMWs: 2022 X5 40i, 2016 X5 50i 2015 Porsche 991 Turbo S 1979 Porsche 911 Turbo (930) a couple others IG: longboarder949; YouTube: https://www.youtube.com/channel/UCT1...eoFBszPIK0gf9w Last edited by Longboarder; 11-28-2012 at 01:33 PM..
	Appreciate 0 Quote