991 DIY sound insulation
04-21-2020, 12:46 PM
#31
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Join Date: Jul 2001
Location: Marineland FL
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Porsche owners...this is why Porsche is making tons of money off of us, with their ala cart options menu. They know us and are profiting off all our differences. I love this forum, people helping people make the car thier own, other are pissed at why would you do that or this..the leave it stock crowd.
As long as all people enjoy the 911 in any of its form, I feel good for the brand, as it will continue on.
Go on peeps, change you sport car into a caddi cruiser with HIFI sounds! Prop the the peeps that leave it stock and just drive it!
Im only sad for the 1k/year crowd, its a lot to pay for a garage ornament. We only have a short time on this rock, why save the car for the next guy.
Cheers,
-R
As long as all people enjoy the 911 in any of its form, I feel good for the brand, as it will continue on.
Go on peeps, change you sport car into a caddi cruiser with HIFI sounds! Prop the the peeps that leave it stock and just drive it!
Im only sad for the 1k/year crowd, its a lot to pay for a garage ornament. We only have a short time on this rock, why save the car for the next guy.
Cheers,
-R
04-22-2020, 11:28 PM
#32
Noise in the 911's is the cost of light weight. You can't have both light weight and low noise. I have an E39 BMW M5 and it is like a limo compared to my 911, but the BMW weighs considerably more with a softer suspension. Needless to say the BMW does not go or corner as fast as the 911. My older Euro '85 M635 was firmer and noisier like the 911, 3300 lbs with little to no door insulation (not at all like the US M6 or 635 which weighed in at 3800-3900 lbs).
I cannot understand folks buying a street-able race car like the GT3 and then complaining about road noise.
I cannot understand folks buying a street-able race car like the GT3 and then complaining about road noise.
04-23-2020, 12:39 AM
#33
Burning Brakes
Noise in the 911's is the cost of light weight. You can't have both light weight and low noise. I have an E39 BMW M5 and it is like a limo compared to my 911, but the BMW weighs considerably more with a softer suspension. Needless to say the BMW does not go or corner as fast as the 911. My older Euro '85 M635 was firmer and noisier like the 911, 3300 lbs with little to no door insulation (not at all like the US M6 or 635 which weighed in at 3800-3900 lbs).
I cannot understand folks buying a street-able race car like the GT3 and then complaining about road noise.
I cannot understand folks buying a street-able race car like the GT3 and then complaining about road noise.
Aftermarket product anyone? No licensing fee required for the idea.
06-10-2024, 01:45 PM
#34
This thread comes up first when searching 991 sound insulation, so I'll add this here:
991.2 c2s.
Some low hanging fruit.
I removed the panel from under the rear window and noticed it's just a large cavity with one chunk of foam floating loosely around.
1. Removed the foam
2. I cut a 6x60" length of 3M Thinsulate
3. Cover the rear wit ha blanket or towel, this stuff SHEDS
4. Threaded the thinsulate between the metal support and the body of the car (in the void.) The thinsulate is wider than the body, so double it up in the corners. Stuff it into the void there.
5. Place the factory block BETWEEN the thinsulate and metal bracket
6. close it up
What happened?
The 991.2 was driving me absolutely nuts with the high frequency rubbing sandpaper/gravel/rough sound from the tires. This eliminated the worst of it.
Of course, the tires are still noisy. But now the painful octave they created is nearly gone entirely.
991.2 c2s.
Some low hanging fruit.
I removed the panel from under the rear window and noticed it's just a large cavity with one chunk of foam floating loosely around.
1. Removed the foam
2. I cut a 6x60" length of 3M Thinsulate
3. Cover the rear wit ha blanket or towel, this stuff SHEDS
4. Threaded the thinsulate between the metal support and the body of the car (in the void.) The thinsulate is wider than the body, so double it up in the corners. Stuff it into the void there.
5. Place the factory block BETWEEN the thinsulate and metal bracket
6. close it up
What happened?
The 991.2 was driving me absolutely nuts with the high frequency rubbing sandpaper/gravel/rough sound from the tires. This eliminated the worst of it.
Of course, the tires are still noisy. But now the painful octave they created is nearly gone entirely.