Unhappy with Akra exhaust @ gear changes

SPQR M3 · 11-23-2011, 06:46 PM

I have the Akra Evo setup with ESS tune. I am happy with the tune and and the performance, the car is smooth and over 4000 rpm the sound is intoxicating.

However I am not happy with the sound when moving up through the gears (DCT), there is a pronounced "boom" especially in the sub-4000 rpm rev range when shifting up.

Does anyone else with a similar setup have the same issues and is there anything that can be done? Everything else about this exhaust is fantastic, the build quality, the appearance, the weight etc. But I feel that Akrapovic should have designed an exhaust that sounded good across the entire rev range, not just at high revs.

m3heaven · 11-23-2011, 06:53 PM

I actually like the sound the Akrapovic makes when you shift gears hahaha.

tlp · 11-23-2011, 06:57 PM

The quick burst sounds like a exhaust sneeze between shifts. I don't notice it that much anymore. I think the exhaust has mellowed out bit after break in.

SPQR M3 · 11-23-2011, 07:12 PM

Yes - sometimes it sounds like a sneeze, which I don't mind, but sometimes it sounds like a hollow boom, which I hate

klammer · 11-23-2011, 07:40 PM

Have your setup and absolutely love everything about it. Not sure about the "boom" you describe, but love the "sneeze" others mention. Best complementary setup on the market IMHO.

Daft · 11-23-2011, 08:52 PM

I don't know how anyone cannot like the upshift sounds. In fact every note this exhaust makes is so nice!

w00tw00t · 11-23-2011, 08:56 PM

for me, I think the "boom" has gone away... I think I've done about 1000 miles since I got the exhaust .. and its noticably deeper, even more amazing and no more boom.. (i think) or maybe I've stopped noticing it..

bigeye · 11-23-2011, 09:58 PM

I hated the boom at first also...used to it now...

edu09 · 11-23-2011, 09:59 PM

Quote:

Originally Posted by w00tw00t

for me, I think the "boom" has gone away... I think I've done about 1000 miles since I got the exhaust .. and its noticably deeper, even more amazing and no more boom.. (i think) or maybe I've stopped noticing it..

I also have the akra evo with ESS DF Akra Tune and my "boom" has gone away also or so I think but I love everything about this exhaust, it is just awesome

Singletrack · 11-24-2011, 11:24 AM

Sound changes as it breaks in - although I only have the rear section. It was more bassy and boomy initially.

Oh and it you still don't like it, and to make you feel better - listen to the sound the X5M and X6M make at shift points stock - sounds like a fart : )

E93Blackhawk · 11-24-2011, 11:38 AM

Quote:

Originally Posted by edu09

I also have the akra evo with ESS DF Akra Tune and my "boom" has gone away also or so I think but I love everything about this exhaust, it is just awesome

Sorry slightly off topic...

Getting the akra eve with the eSS akra tune myself very soon.

Do you have any hp gain numbers pre/post installation of the two?

M3DCTBT · 11-24-2011, 12:26 PM

Quote:

Originally Posted by SPQR M3

I have the Akra Evo setup with ESS tune. I am happy with the tune and and the performance, the car is smooth and over 4000 rpm the sound is intoxicating.

However I am not happy with the sound when moving up through the gears (DCT), there is a pronounced "boom" especially in the sub-4000 rpm rev range when shifting up.

Does anyone else with a similar setup have the same issues and is there anything that can be done? Everything else about this exhaust is fantastic, the build quality, the appearance, the weight etc. But I feel that Akrapovic should have designed an exhaust that sounded good across the entire rev range, not just at high revs.

Your stock exhaust does it too. You just hear it more now. Its a dct trait

JCtx · 11-24-2011, 02:17 PM

I think people get used to the new sounds more than 'it changes' with mileage, but why don't you give it at least 1K miles? If you still don't like it then, look for fixes. Good luck.

edu09 · 11-24-2011, 03:24 PM

Quote:

Originally Posted by E93Blackhawk

Sorry slightly off topic...

Getting the akra eve with the eSS akra tune myself very soon.

Do you have any hp gain numbers pre/post installation of the two?

I didnt dyno my car when it was stock but the hp gain is very noticeable with the akra evo system, I previously had the BMW performance exhaust with the ESS DF tune and couldnt notice any real gain but with the akra evo you remove the cats and that makes the hp gain very noticeable, make sure you get the ESS DF with the akra tune to avoid the dip you will feel with this system below 2000 rpms

Raptor251 · 11-24-2011, 03:58 PM

Sell it and buy a 6MT?

I love the noise... It scares people

dex37 · 11-25-2011, 06:21 PM

Are there any videos which capture those sounds which the exhaust makes?

OC ///M · 11-27-2011, 10:42 AM

Quote:

Originally Posted by M3DCTBT

Your stock exhaust does it too. You just hear it more now. Its a dct trait

^ +1

It pops with the faster shifting DCT. 6MT'ers experience a more subtle version of this. I love it all.

11-23-2011, 06:46 PM	#1
SPQR M3 First Lieutenant 43 Rep 330 Posts Drives: 2009 E92 325i Join Date: Jan 2009 Location: Australia iTrader: (0)	Unhappy with Akra exhaust @ gear changes I have the Akra Evo setup with ESS tune. I am happy with the tune and and the performance, the car is smooth and over 4000 rpm the sound is intoxicating. However I am not happy with the sound when moving up through the gears (DCT), there is a pronounced "boom" especially in the sub-4000 rpm rev range when shifting up. Does anyone else with a similar setup have the same issues and is there anything that can be done? Everything else about this exhaust is fantastic, the build quality, the appearance, the weight etc. But I feel that Akrapovic should have designed an exhaust that sounded good across the entire rev range, not just at high revs.
	Appreciate 0 Tweet Quote

11-23-2011, 06:53 PM	#2
m3heaven Major 179 Rep 1,245 Posts Drives: 2003.5 E46 M3 Join Date: Feb 2008 Location: Los Angeles, CA iTrader: (10)	I actually like the sound the Akrapovic makes when you shift gears hahaha.
	Appreciate 0 Quote

11-23-2011, 06:57 PM	#3
tlp Colonel 276 Rep 2,216 Posts Drives: 991 GT3, Sold:'11 e92 M3 SG/FR Join Date: Jul 2005 Location: Las Vegas/SoCal iTrader: (6) Garage List SOLD 2011 BMW e92 M3 [9.10]	The quick burst sounds like a exhaust sneeze between shifts. I don't notice it that much anymore. I think the exhaust has mellowed out bit after break in. __________________ 991 GT3, Sold: '11 e92 M3 SG/FR ZCP\|ZCV\|ZP2\|2MK\|494\|415\|6NR\|752
	Appreciate 0 Quote

11-23-2011, 07:12 PM	#4
SPQR M3 First Lieutenant 43 Rep 330 Posts Drives: 2009 E92 325i Join Date: Jan 2009 Location: Australia iTrader: (0)	Yes - sometimes it sounds like a sneeze, which I don't mind, but sometimes it sounds like a hollow boom, which I hate
	Appreciate 0 Quote

11-23-2011, 07:40 PM	#5
klammer Brigadier General 97 Rep 3,246 Posts Drives: 11 spc gry m3 e90, 19 X5 Join Date: Jan 2010 Location: chicago iTrader: (0)	Have your setup and absolutely love everything about it. Not sure about the "boom" you describe, but love the "sneeze" others mention. Best complementary setup on the market IMHO. __________________ mods: track ready stuff
	Appreciate 0 Quote

11-23-2011, 08:52 PM	#6
Daft Major 384 Rep 1,202 Posts Drives: 2021 M2C Join Date: Jan 2009 Location: Ontario, Canada iTrader: (2) Garage List 2003 BMW M3 [10.00] 2011 BMW M3 [9.71]	I don't know how anyone cannot like the upshift sounds. In fact every note this exhaust makes is so nice!
	Appreciate 0 Quote

11-23-2011, 08:56 PM	#7
w00tw00t Colonel 408 Rep 2,171 Posts Drives: 2016 MW M4 Join Date: Oct 2010 Location: San Jose, CA iTrader: (13)	for me, I think the "boom" has gone away... I think I've done about 1000 miles since I got the exhaust .. and its noticably deeper, even more amazing and no more boom.. (i think) or maybe I've stopped noticing it..
	Appreciate 0 Quote

11-23-2011, 09:58 PM	#8
bigeye Enlisted Member 0 Rep 37 Posts Drives: E92 M3 Join Date: Mar 2011 Location: Perth, Australia iTrader: (0)	I hated the boom at first also...used to it now...
	Appreciate 0 Quote

11-24-2011, 11:24 AM	#10
Singletrack 4th down; 4th quarter? Renegade. 87 Rep 3,850 Posts Drives: 09 SSII E92 M3; 19 FG M5C Join Date: Aug 2008 Location: Pittsburgh, PA iTrader: (3)	Sound changes as it breaks in - although I only have the rear section. It was more bassy and boomy initially. Oh and it you still don't like it, and to make you feel better - listen to the sound the X5M and X6M make at shift points stock - sounds like a fart : )
	Appreciate 0 Quote

11-24-2011, 02:17 PM	#13
JCtx Major General 258 Rep 5,012 Posts Drives: No BMW yet Join Date: May 2008 Location: El Paso TX iTrader: (0)	I think people get used to the new sounds more than 'it changes' with mileage, but why don't you give it at least 1K miles? If you still don't like it then, look for fixes. Good luck.
	Appreciate 0 Quote

11-24-2011, 03:58 PM	#15
Raptor251 ESS Dreaming 27 Rep 870 Posts Drives: 2011.5 e92 m3/Ford Raptor 6.2 Join Date: Jan 2011 Location: San Diego iTrader: (1)	Sell it and buy a 6MT? I love the noise... It scares people
	Appreciate 0 Quote

11-25-2011, 06:21 PM	#16
dex37 Second Lieutenant 12 Rep 206 Posts Drives: E92 M3 Join Date: Nov 2011 Location: Germany iTrader: (0)	Are there any videos which capture those sounds which the exhaust makes?
	Appreciate 0 Quote