992 4S review by CARWOW
05-14-2019, 12:42 PM
#16
Then there's the hardware, with Porsche having upgraded both the exhaust (standard and sport versions) and the sound symposer (tuber channeling engine noise into the cabin, rather that speaker-delivered aural augmentation as you get with brands like BMW).
And, before inviting you to check out the 2020 Porsche 911 Carrera S track stint, we'll remind you how the carmaker describes the said hardware changes.
"The engineers have paid great attention to the sound balance of the intake and exhaust sides when carrying out further development. A sound symposer with activatable second channel behind the rear trim panel provides information on the breathing frequency of the flat engine. The exhaust systems have been revamped to offer a characteristic and attractive sound experience for the Porsche 911, in spite of stricter noise requirements and installation of the gasoline particulate filter. The twin-branch exhaust system now includes map-controlled and fully variable exhaust flaps. This control system permits both optimum power development as well as an emotional sound. The flaps are actuated electrically by means of stepper motors. This makes it possible to now also set intermediate positions," we are being told
And, before inviting you to check out the 2020 Porsche 911 Carrera S track stint, we'll remind you how the carmaker describes the said hardware changes.
"The engineers have paid great attention to the sound balance of the intake and exhaust sides when carrying out further development. A sound symposer with activatable second channel behind the rear trim panel provides information on the breathing frequency of the flat engine. The exhaust systems have been revamped to offer a characteristic and attractive sound experience for the Porsche 911, in spite of stricter noise requirements and installation of the gasoline particulate filter. The twin-branch exhaust system now includes map-controlled and fully variable exhaust flaps. This control system permits both optimum power development as well as an emotional sound. The flaps are actuated electrically by means of stepper motors. This makes it possible to now also set intermediate positions," we are being told
05-14-2019, 01:09 PM
#17
Source here: https://www.autoevolution.com/news/2...er-130970.html
Another source which mentions it: https://www.autoblog.com/2019/03/07/...ls-technology/
“The tweaked exhaust system — which in Europe will flow through a gas particulate filter that adds 15 pounds — employs fully variable exhaust flaps. As with the turbo wastegates, the formerly vacuum-controlled, binary-position flap controllers take orders from electric stepper motors and provide a wider range of sound. Even so, the sound symposer first installed on the 991 series has added a second, switchable channel behind the rear trim panel to pipe more aural sensation into the cabin.”
Another source which mentions it: https://www.autoblog.com/2019/03/07/...ls-technology/
“The tweaked exhaust system — which in Europe will flow through a gas particulate filter that adds 15 pounds — employs fully variable exhaust flaps. As with the turbo wastegates, the formerly vacuum-controlled, binary-position flap controllers take orders from electric stepper motors and provide a wider range of sound. Even so, the sound symposer first installed on the 991 series has added a second, switchable channel behind the rear trim panel to pipe more aural sensation into the cabin.”
05-14-2019, 01:11 PM
#18
Drove the 992s a while ago with pse and was very surprised how good the cabin sound was when driving fast and quickly downshifting. I had a 991.2 GT3 before and thought the 992 sounded even better inside with auto blipping. When watching the videos how it sounds from the outside I wouldn't be surprised if it has speaker enhanced exhaust sound.
05-14-2019, 04:32 PM
#19
Drove the 992s a while ago with pse and was very surprised how good the cabin sound was when driving fast and quickly downshifting. I had a 991.2 GT3 before and thought the 992 sounded even better inside with auto blipping. When watching the videos how it sounds from the outside I wouldn't be surprised if it has speaker enhanced exhaust sound.
I was behind a 991.2 yesterday... and oddly enough when it drove away from the light I heard the turbo spool... but not the exhaust!
05-14-2019, 05:05 PM
#20
Race Car
Drove the 992s a while ago with pse and was very surprised how good the cabin sound was when driving fast and quickly downshifting. I had a 991.2 GT3 before and thought the 992 sounded even better inside with auto blipping. When watching the videos how it sounds from the outside I wouldn't be surprised if it has speaker enhanced exhaust sound.
But excellent pipes! It really shows how much the rising/falling notes of the intakes adds to the overall flat 6 ambience.
05-15-2019, 10:51 AM
#23
Rennlist Member
