ace37

I'd start with amazon personally. Probably lots of options so perhaps others have found a better source.

Dynamat is one trade name you can google for starters. Car audio shops carry this stuff and car audio forums discuss it. Mass loaded vinyl is another product that was mentioned. Good coverage will add a bit of weight.

991 Dreamer

Thank you Ace.

Lancelakewood

Last Fall I had a fellow change out carpets in my TR6. I read up and decided to use RAAMmat and Ensolite. The car stereo shop told me it would be a waste. It wasn't. I put it everywhere but the doors. It is in the firewall, tunnel, wheel wells, trunk. I can tell the car is a little slower but it is not a 911 which has about 210 more HP and only a few hundred pounds more weight than than a TR6. I love how I can hear both the radio and the exhaust note on the TR6 much better now.

I am looking at something for sound in my 997.1 C2. I see I have Michelin on back and I forgot the Japanese brand on front. Maybe that is part of the sound problem. Fare amount of wear on the rear.

I love Michelin for sound and ride on my Outback. I have had couple sets. I love them.

I was just now reading on a Tacoma forum where a guy used part Dyanamat and part RAAMat with Ensolite in his truck. He said as far as application goes, Dynamat was easier to work with, less sticky, easier to reposition and get into nooks. He said next time he would get Dynamat but add the Ensolite foam to it.

shake1

I need to give this a shot one of these weekends. After driving a Cayenne all weekend I realized how loud the 911 is. I don’t mind exhaust / engine sound at all but it’s the road noise and rock sounds I find annoying. Always feels like rocks are rattling around on there. It does feel cheap like you mentioned.

See U n RearView

What a great thread! I also like a more soundproofed car. I mean I’ll probably be purchasing a cab so if I want noise, I should be able to hear all I need by opening the cab

thanks for all the great pics. This is a must do for me

991 Dreamer

I have a cab and still hate all the road noise. Love the angry engine though

I’m surprised Porsche doesn’t create a package to reduce the noise and charge us an exorbitant amount to fatten their bank account. I’m sure a lot of people would select it.

PJ Cayenne

It's just one of those things that when you test drive a 911 and hear the gravel and other noises you say to yourself "you've got to be kidding".
A couple of pounds of rubberized coating on the inner wheel wheels would do wonders to knock down the tin can noise.

Edit: One thing that makes the gravel noise worse is the stickiness of the tires. The tires pick up the gravel by adhesion and then the gravel is released by the force of the spinning tire.

See U n RearView

That would be a big seller! What maybe $1750

Bemo

I’ll pay for sound deadening and 2 more sound symposers, to pump even more NA noise into the cabin!

R_Rated

IPD plenum and BMC filters will do this.