[Info@mad-us.com]

Originally Posted by yoandry

Actually, that's what they said, but that 50% is like 90%. I really cannot tell that big of a difference at all.

50% valve might not create enough pressure to force the air through the oem muffler. Bmw chose that 30-40% valve angle for a reason.

[mike@x-ph.com]

Originally Posted by OGOverkill

I currently have the AA catted DPs and have yet to install the AWRON valve controller. Was considering the Remus secondary cat delete or the Akrapovik ti resonated mid pipe

deleting the resonators or cats and keeping the stock dual-pipe design will make the car louder but not necessarily better.

I recommend you get a single midpipe instead for a cleaner sound with a deep mid-range tone. you want a more aggressive sound but with minimum rasp and noise.

[Jax327]

Originally Posted by Info@mad-us.com

50% valve might not create enough pressure to force the air through the oem muffler. Bmw chose that 30-40% valve angle for a reason.

Mike,

Ive been running mine at 50% to keep the drone to a minimal. Its still pretty loud though. Will running the car at 50% hurt the motor?

[Info@mad-us.com]

Originally Posted by Jax327

Mike,

Ive been running mine at 50% to keep the drone to a minimal. Its still pretty loud though. Will running the car at 50% hurt the motor?

Not Mike but quick answer is no. You can run it however you like. The valve plays more of a role in where the exhaust gasses travel - through the straight pipe section or muffler section. More valve closure means more muffler which results in less volume.

A 50% percent open valve is likely to flow almost all gases through the straight pipe.

The only concern I would have is locking the valve completely shut in a high temp situation like a track day. As you can see the stock muffler piping diameter is much smaller and this will likely cause more back pressure, heat build up and less hp.

We use a slightly larger muffler piping diameter on our axle back but I still wouldn't suggest 100% closure in the above situation.

Hope that helps

[Berzerker]

Originally Posted by Jax327

Mike,

Ive been running mine at 50% to keep the drone to a minimal. Its still pretty loud though. Will running the car at 50% hurt the motor?

If you want it to keep it quiet I would just leave it at OEM control, that'll give you the silence at lower RPMs with the loudness at punching it, with the ability for the gasses to flow more freely.

IMO 50 and 100% are more for if you want it louder all the time/at lower RPMs.

[mike@x-ph.com]

Originally Posted by Jax327

Mike,

Ive been running mine at 50% to keep the drone to a minimal. Its still pretty loud though. Will running the car at 50% hurt the motor?

as long as you do not have the valves fully closed and you are pushing the car on a track, you will be fine

[SigmaShift]

Originally Posted by Jax327

I would definitely get the SST controller. I currently have the MAD non-res midpipe and if I were to do it over again I would get the resonated version. I still may swap them down the road here.

Just do the resonated downpipes.

[JDUNITNOW]

Originally Posted by gunmike1

I recently did the non-resonated MAD midpipe and SST valve controller, and am very happy with it. At first with the valves open on the freeway it had a little drone, but once I turned off ASD in BimmerCode it is great. If you want it quieter then put it in OEM or closed mode, and it is far quieter.

Turning off ASD, can you still hear exhaust and burbles?

[Berzerker]

Originally Posted by JDUNITNOW

Turning off ASD, can you still hear exhaust and burbles?

Burbles are "real" controlled by the computer, as long as the middle exhaust button is on, it'll burble. A midpipe swap will make the car actually physically audible, and it's advisable to disable ASD to not mix real with fake sounds.

[mike@x-ph.com]

Originally Posted by JDUNITNOW

Turning off ASD, can you still hear exhaust and burbles?

the burbles are the same

The sound of the exhaust is lower inside the cabin but that's because you are hearing what you sound like and not the fake sound.

I'm shocked that customers haven't pushed back against manufacturers for using fake sounds in cars. It's like purchasing a sports car with a 0-60 mph acceleration time of 6 seconds, but the dashboard shows you a time of 2.5 seconds, and no one is bothered by it.

[Berzerker]

Originally Posted by mike@x-ph.com

the burbles are the same

The sound of the exhaust is lower inside the cabin but that's because you are hearing what you sound like and not the fake sound.

I'm shocked that customers haven't pushed back against manufacturers for using fake sounds in cars. It's like purchasing a sports car with a 0-60 mph acceleration time of 6 seconds, but the dashboard shows you a time of 2.5 seconds, and no one is bothered by it.

I mean, sound is all completely subjective and if 99% of people never swap exhausts and like the sound then they're gonna keep doing it...

[mike@x-ph.com]

Originally Posted by Berzerker

I mean, sound is all completely subjective and if 99% of people never swap exhausts and like the sound then they're gonna keep doing it...

I don't care about the sound, I care about it being fake. it's so cheesy and stupid in my opinion.

if your car is quiet and you don't care about that, that's 100% fine.
but pushing a fake sound from your speakers is the part that bothers me

[eric97h]

Originally Posted by mike@x-ph.com

I don't care about the sound, I care about it being fake. it's so cheesy and stupid in my opinion.

if your car is quiet and you don't care about that, that's 100% fine.
but pushing a fake sound from your speakers is the part that bothers me

Mike do you have a link for resonated downpipes and good brand etc or example?

[mike@x-ph.com]

Originally Posted by eric97h

Mike do you have a link for resonated downpipes and good brand etc or example?

I like the single midpipe design, it offers the cleanest sound.

We offer MAD & Active Autowerke resonated midpipes. both are excellent with spot-on fitment and high-quality finish.

[eric97h]

Originally Posted by mike@x-ph.com

I like the single midpipe design, it offers the cleanest sound.

We offer MAD & Active Autowerke resonated midpipes. both are excellent with spot-on fitment and high-quality finish.

by resonated do you mean catted downpipes?

[Info@mad-us.com]

Originally Posted by eric97h

by resonated do you mean catted downpipes?

A Resonator not to be confused with a catalytic converter is basically a fully straight through tube with sound deadening material around the outside that helps reduce higher frequency sounds such as rasp. You can see it on the pipe below.

Good illustration https://www.cjponyparts.com/media/im...or-diagram.gif

[mike@x-ph.com]

Originally Posted by eric97h

by resonated do you mean catted downpipes?

resonated and catted are different. some manufacturers offer catted midpipes, i prefer the resonated option

[JDUNITNOW]

Originally Posted by mike@x-ph.com

the burbles are the same

The sound of the exhaust is lower inside the cabin but that's because you are hearing what you sound like and not the fake sound.

I'm shocked that customers haven't pushed back against manufacturers for using fake sounds in cars. It's like purchasing a sports car with a 0-60 mph acceleration time of 6 seconds, but the dashboard shows you a time of 2.5 seconds, and no one is bothered by it.

That's OK that I hear the exhaust and burbles, I don't think want to totally kill the sound inside car. I'm not doing down pipes but want more deeper sound. The only reason I would consider resonated is to make sure there is no drone. My wife complains about how loud it is with valve opened but I think it's the drone with ASD on.

[kgelfen360]

How about thoughts on Dinan mid pipe?

[mike@x-ph.com]

Originally Posted by kgelfen360

How about thoughts on Dinan mid pipe?

Dinan uses an X-pipe design, which leads to a high-pitched sound. It's closer to the exotic car sound but has a lot of raspiness. The Dinan is an excellent option if that is the sound you are after.