Problem with Performance exhaust: drone at 2.ooo rpm

MischiMischi · 08-30-2011, 01:06 AM

Hi,

my dealer in Germany installed the performance exhaust last week on my e90 M.
I really like this exhaust, it has a very exotic sound at 3.500-4000 rpm.

They only problem which I have with this exhaust is, that it drones!
My e90 has DKG and I drive it very often in the automatic mode (going to work in the morning, etc).

At 2.000 rpm the exhaust really has a drone. it is really disturbing and reduces the fun which I have with this exhaust a lot.
The automatic mode also switches gears up as fast as possible, so the engine is very often below 2.000 rpm. If you now accelerate slighty, the automatic mode will not switch the gears down. Now I get the drone

Does anyone has the same?
I am wondering, because when I checked in this forum, everyone said, that the performance exhaust has no drone at all...

Another issue which I have detected is, that the performance exhaust expanse when it is warm.
I have the hahmann-diffusor installed on my e90. With cold exhaust the tips are behind the diffusor (around 1 cm) - you can not see the ///M-logo on the tips.
If the exhaust is warm, the tips come out of the diffusor around 2-3cm - now you can see the ///M-Logo.

Has anyone recognized this on his performance exhaust?

Thank you for you helb.

Best regards from Germany,
Michael

Rshane · 08-30-2011, 02:31 AM

There is a difference between drone and normal exhaust sound. What I've discovered is some folks have differing opinions on what the difference is. The only common thing I've noticed is the younger the individual is the more likely they will say the sound you hear is normal exhaust sound, and the older folks will say what you are hearing is drone.

MischiMischi · 08-30-2011, 03:58 AM

I think it is definitely a drone - you can also feel a slight vibration.

edu09 · 08-30-2011, 04:24 AM

Quote:

Originally Posted by MischiMischi

I think it is definitely a drone - you can also feel a slight vibration.

You may have to tighten the bolts, your exhaust is probably loose, I dont have any problems with vibrations, drone or expansion on my exhaust

J08M3 · 08-30-2011, 06:09 AM

Quote:

Originally Posted by MischiMischi

I think it is definitely a drone - you can also feel a slight vibration.

Even OEM has slight drone at that RPM. BMW put out a tech bulletin about that years ago. In my opinion the performance drone is no more or less than the OEM muffler.

gthal · 08-30-2011, 07:36 AM

Don't drive at 2,000 RPM

The only time the M3 sees that number is as it passes it. I think what you are hearing is normal, expected and not dissimilar to the non-performance exhaust.

Team Plutonium · 08-30-2011, 08:44 AM

Just get an Eisenmann Race instead.

MischiMischi · 08-30-2011, 08:55 AM

Quote:

Originally Posted by edu09

You may have to tighten the bolts, your exhaust is probably loose, I dont have any problems with vibrations, drone or expansion on my exhaust

You were right, thanks a lot.

The garage shop around the corner just put my M on their auto lift.
One connecting pipe was twisted and one clamp was loose.

It looks like the drone is gone now. I will see tonight, when I drive home from the office.

chris s · 08-30-2011, 09:15 AM

Quote:

Originally Posted by SehrSchnell

Just get an Eisenmann Race instead.

LOL

edu09 · 08-30-2011, 09:19 AM

Quote:

Originally Posted by MischiMischi

You were right, thanks a lot.

The garage shop around the corner just put my M on their auto lift.
One connecting pipe was twisted and one clamp was loose.

It looks like the drone is gone now. I will see tonight, when I drive home from the office.

glad you solve it, now enjoy your exhaust, you are going to love it!

VictorH · 08-30-2011, 03:04 PM

There should be no drone with this exhaust really at any rpm. Glad you found the reason for the problem. I thought the German dealers were super conscientious about their service work but I guess you can find some who are not so hot too.

MischiMischi · 08-31-2011, 02:27 AM

Quote:

Originally Posted by VictorH

I thought the German dealers were super conscientious about their service work but I guess you can find some who are not so hot too.

I think this is the same all over the world...

08-30-2011, 01:06 AM	#1
MischiMischi New Member Drives: M3 e90 Competition Join Date: Nov 2010 Location: Germany, Close To FFM Posts: 9 iTrader: (0)	Problem with Performance exhaust: drone at 2.ooo rpm Hi, my dealer in Germany installed the performance exhaust last week on my e90 M. I really like this exhaust, it has a very exotic sound at 3.500-4000 rpm. They only problem which I have with this exhaust is, that it drones! My e90 has DKG and I drive it very often in the automatic mode (going to work in the morning, etc). At 2.000 rpm the exhaust really has a drone. it is really disturbing and reduces the fun which I have with this exhaust a lot. The automatic mode also switches gears up as fast as possible, so the engine is very often below 2.000 rpm. If you now accelerate slighty, the automatic mode will not switch the gears down. Now I get the drone Does anyone has the same? I am wondering, because when I checked in this forum, everyone said, that the performance exhaust has no drone at all... Another issue which I have detected is, that the performance exhaust expanse when it is warm. I have the hahmann-diffusor installed on my e90. With cold exhaust the tips are behind the diffusor (around 1 cm) - you can not see the ///M-logo on the tips. If the exhaust is warm, the tips come out of the diffusor around 2-3cm - now you can see the ///M-Logo. Has anyone recognized this on his performance exhaust? Thank you for you helb. Best regards from Germany, Michael
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08-30-2011, 02:31 AM	#2
Rshane M-Flight Member Drives: 2011 E92 M3 Join Date: Jul 2010 Location: Geilenkirchen, Germany Posts: 1,063 iTrader: (0)	There is a difference between drone and normal exhaust sound. What I've discovered is some folks have differing opinions on what the difference is. The only common thing I've noticed is the younger the individual is the more likely they will say the sound you hear is normal exhaust sound, and the older folks will say what you are hearing is drone. __________________ 2011 Le Mans Blue M3// Black extended Novillo w/ Blue Grey Aluminum trim/DCT/ZTP/ZCW/ZPP/ZCP Premium Sound ///Akrapovic Evolution Exhaust 2012 Le Mans Blue 135i M Pkg DCT 2008 Brilliant Red Audi TT 3.2 Quattro 6M

08-30-2011, 07:36 AM	#6
gthal Colonel Drives: C63 coupe Join Date: Jul 2007 Location: Canada Posts: 2,055 iTrader: (2) Garage List 2011 M3 [3.37]	Don't drive at 2,000 RPM The only time the M3 sees that number is as it passes it. I think what you are hearing is normal, expected and not dissimilar to the non-performance exhaust. __________________ 2014 Corvette Stingray \| Cyber Grey \| Z51 \| On order... 2012 C63 coupe \| Obsidian Black \| Performance Package (481hp, 443ft/lbs) \| Sold 2011 M3 coupe \| Jerez Black \| ZCP/DCT \| Sold but never forgotten nor will the love affair end 2010 M3 coupe \| Alpine White \| 6MT \| Sold

08-30-2011, 08:44 AM	#7
Team Plutonium Major General Drives: 911 Join Date: Dec 2007 Location: Upstate Posts: 8,806 iTrader: (1)	Just get an Eisenmann Race instead. __________________ Gone... ESS VT2-625 \| ESS Tune \| M24 Oil Cooler \| Brembo 380mm BBK \| Dinan 4.10 Diff \| KW Variant 3 Coilovers \| Dinan Camber Plates \| Dinan Strut Tower Braces \| Dinan X-Pipe \| Akrapovic Exhaust \| Vorsteiner GTS3 Bumper \| Varis System One Diffuser \| OEM Performance Spoiler \| Stack Gauges \| GTS Door Sills \| Volk TE37 \| Falken Azenis RT615K 275/315 \| Pulled Fenders \| Turner Stud Kit \| OMP ARS Racing Seats New: 991C2S

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08-30-2011, 03:58 AM	#3
MischiMischi New Member Drives: M3 e90 Competition Join Date: Nov 2010 Location: Germany, Close To FFM Posts: 9 iTrader: (0)	I think it is definitely a drone - you can also feel a slight vibration.

08-30-2011, 03:04 PM	#11
VictorH Lieutenant Drives: '09 M3 Join Date: Dec 2007 Location: SC Posts: 548 iTrader: (1)	There should be no drone with this exhaust really at any rpm. Glad you found the reason for the problem. I thought the German dealers were super conscientious about their service work but I guess you can find some who are not so hot too.