Road Noise - S vs Turbo S
#31
This is an old post but I'm seeing a possible misconception here. The lightweight noise insulating glass option is lightweight first and tries to compensate for loss of thickness with sound insulation. As I understand, this option is actually louder than the base glass.
Last edited by midwstCostofLivg; 08-09-2023 at 12:59 PM.
#32
Drifting
This is an old post but I'm seeing a possible misconception here. The lightweight noise insulating glass option is lightweight first and tries to compensate for loss of thickness with sound insulation. As I understand, this option is actually louder than the base glass.
#33
I don't think that conclusion is correct. Porsche seems to say it can reduce noise transmission by about 15%. But the 911 model is just noisy, especially from tire roar, so it's a car best suited to people who don't mind some hearing loss over time. If the sound deadening material does what BlueHighways says, I wonder why Porsche doesn't offer it as an option to those who don't mind adding 50 lbs of weight in exchange for a car that is 10db quieter. I wouldn't want to apply this stuff to the outside of the car though (i.e. wheel well). I'm sure plenty of water gets into the area when driving in rain storms or through puddles and who knows where it will get trapped. Rust is always a concern.
#34
Nick Murray has also said that the 911 lightweight glass option is noisier than base. (during a review of 2 992's - one with and one without the option)
Last edited by midwstCostofLivg; 08-09-2023 at 02:21 PM.
#35
The TTS has more sound deadening for sure and has much less road and tire noise then my GTS had.
In normal mode it is quiet, in sport mode or with the exhaust switched on it actually pipes engine noise into the cabin, this is what my dealer told me and it is definitely noticeable.
In normal mode it is quiet, in sport mode or with the exhaust switched on it actually pipes engine noise into the cabin, this is what my dealer told me and it is definitely noticeable.
#36
Instructor
Also, this glass was definitely marketed for its noise-insulating qualities over its lightness when I bought my C4S in 2021. This whole subject is so subjective and confusing, I have even started wondering whether there are two types of glass. One is lightweight (and noise insulating) for the T, GT cars etc, and the other is noise insulating (and lighter weight) in the C2, C4, Turbo etc. (And similar to what is in other models like the Panamera in the article above)
Last edited by aquatone; 08-09-2023 at 02:56 PM.
#37
Drifting
I'm not so sure. They rate the thermally and noise insulated glass on 4 door models at 7% reduction - but that is not a lightweight glass option. https://newsroom.porsche.com/en/2021...401-26834.html
#38
I'll add that when I upgraded from a 991 C4S to a 991 Turbo, there is a really big difference in cabin noise levels. The Turbo is much quieter. That's how I landed in this thread - looking for answers on what differences there might be, and recently was learning about the 992 glass options as I look to place an order. Here's the Nick Murray video where he mentions the lightweight glass being noisier, granted it's a GTS vs a CS, but the guys is very well versed in Porsche options so I expect he's taking that into account.