The answer is probably the Sound Symposer, which we all know about.

But, is there a way to have this induction noise "on" all the time? I'm assuming the sound symposer valve is what pipes the induction noise into the cabin, but all of our discussions I've seen over the years only talk about how to mute/turn off the symposer.

It's clear that the interior induction noise gets much louder around 2,600-2,900RPM IIRC, and it's quite noticeable. I'm not confusing this with the exhaust valves opening up around 3,300RPM.



Oh, and, I missed you guys.

 

are you referring to the PSE button?

 

Nope. If I'm not mistaken, I'm referring to the actual sound symposer system (the valve and pipe that let engine induction noise into the cabin). I know that we can essentially disable this system and/or plug the pipe to reduce the intake induction noise.

What I'm wondering is if the opposite is possible-- to allow engine/induction noise to enter the cabin 100% of the time. As it stands, the induction noise valve sounds like it opens around 2,800rpm.

 

The symposer opens up with the Sport or Sport Plus buttons engaged. It is not related to the engine RPM.

 

Symposer is a fancy word for sound pipe that opens and closes. I suppose you could probably force the solenoid open if you wanted. To be honest I like being able to leave it off or turn it off sometimes especially on long road trips...

 

Not sure we're talking about the same thing. I understand that the symposer opens/closes with Sport/SP. However, the cabin noise exponentially increases because something opens up around 2,800RPM. Next time you're in the car, go full throttle in 2nd or 3rd gear when you're around 2,000rpm and keep an ear out. You'll hear interior induction noise go up tenfold around 2,800RPM. I am assuming the symposer opens up fully at this point. It closes again when you let off the throttle.


Yeah. Thing is, this noise isn't always piping in; definitely not while cruising. It only happens at full throttle (or almost full throttle). And it opens right around 2,800rpm.

 

I believe Christophosphorus is correct. Both the symposer and the sport exhaust open their "flaps" at full throttle even without the sport button selected.

 

Resurrecting this old thread. Is the Sound Symposer standard equipment, or an option? This question is specific to a 2015 Turbo S.