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Soundproofing advice?

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Old 02-17-2018, 11:31 AM
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GDOG8
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Default Soundproofing advice?

I am looking for soundproofing advice from people who have done it. I will be getting the whole interior of my car redone, carpet, seats, door cards, etc. I want to completely soundproof the car while it is torn apart as I am sensitive the road and engine noise-even. My interior guy recommends a combination of dynamat on the flat surfaces, and a thinner rubber material everywhere else.

Any tips and experiences you can share are appreciated, so I can have semi-intelligent discussions with my installer as I get the sense he doesn’t do this type of thing often.

Thanks,
-G
Old 02-17-2018, 12:43 PM
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samurai_k
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@foxman did a nice job writing up his interior update here...

https://rennlist.com/forums/993-foru...install-3.html
Old 02-17-2018, 01:03 PM
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GDOG8
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Just read it. Thanks.

Any other her advice is welcomed. My plan is not lightweight. A combination of dynamat and the black rubberized stuff my guy recommends with regular sliverknit carpeting which also has 1/4” or more backing.
Old 02-17-2018, 01:43 PM
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Jjm4life
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Please take this as a serious comment, but have you considered getting a set of earplugs? A lot of musicians I work with have custom made ear plugs that are very comfortable and work incredibly well. It's a cheap alternative to all of the excess work and weight you're considering adding to your car. Even the throwaway ones Ive used when working in nightclubs and music venues are a godsend. I've even ridden my motorcycle with them in from time to time.
Old 02-17-2018, 02:35 PM
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mbintx
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Originally Posted by Jjm4life
Please take this as a serious comment, but have you considered getting a set of earplugs? A lot of musicians I work with have custom made ear plugs that are very comfortable and work incredibly well. It's a cheap alternative to all of the excess work and weight you're considering adding to your car. Even the throwaway ones Ive used when working in nightclubs and music venues are a godsend. I've even ridden my motorcycle with them in from time to time.
Cheaper. Lighter. Easily reversible.
Old 02-17-2018, 03:02 PM
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Thanks, Jim4Life. I understand. I actually have the best custom ear plugs in the world for shooting( should have had the 40 years ago). I need my jams though, tough to hear my music with the plugs in, plus I think it’s slightly unsafe to drive with them in.
Old 02-17-2018, 03:03 PM
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Boeing 717
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How much weight is added by doing the things you want to do?
Old 02-17-2018, 03:38 PM
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John McM
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I took out all of the soundproofing and installed Dynamat with Dynaliner over the top. It was a full install of both and the weight was a push to the original. The heavy part was the dynamat. It noticeably reduces noise but not modern quiet.
Old 02-17-2018, 05:36 PM
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GDOG8
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Jerry- good question on weight...I don’t know. My guess is as good as yours(maybe not). I will guess +35lbs. I can weigh the old and new soundproofing and carpet.
Old 02-17-2018, 06:28 PM
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John,
Thank for the info. I’m not looking for modern quiet, but my 964 is already quieter than my 07 c2s. I really think it’s not far off from my 15 c2s already, although it has much bigger tires- which might be why.
Old 02-17-2018, 06:31 PM
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Originally Posted by GDOG8
Jerry- good question on weight...I don’t know. My guess is as good as yours(maybe not). I will guess +35lbs. I can weigh the old and new soundproofing and carpet.
Meh, 35 pounds is no big deal unless your making a track car. I'd gladly add 35 pounds if it significantly made for a more comfortable ride. That's like having 5 extra gallons of gas in your tank.

Last edited by Boeing 717; 02-17-2018 at 09:06 PM.
Old 02-17-2018, 09:49 PM
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John McM
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From my thread: I added 3.1kg in Dynaliner and 13kg in Dynamat. Add in the rubber sheets I added and this is a net PUSH on OE weight I.e. This car is no heavier than the day it was built.

btw i way overused the Dynamat.
Old 02-17-2018, 10:28 PM
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Originally Posted by John McM
From my thread: I added 3.1kg in Dynaliner and 13kg in Dynamat. Add in the rubber sheets I added and this is a net PUSH on OE weight I.e. This car is no heavier than the day it was built.

btw i way overused the Dynamat.
Have you driven it since? Did it help a lot?
Old 02-17-2018, 11:26 PM
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John McM
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Originally Posted by Boeing 717
Have you driven it since? Did it help a lot?
Yes, I have. It was certainly quieter than my other C4 but nowhere near, say, Cayenne quiet.
Old 02-18-2018, 01:14 AM
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Originally Posted by GDOG8
Thanks, Jim4Life. I understand. I actually have the best custom ear plugs in the world for shooting( should have had the 40 years ago). I need my jams though, tough to hear my music with the plugs in, plus I think it’s slightly unsafe to drive with them in.
A few steps down from shooting hearing protection and you should be fine. My sound technicians use them So you shouldn't have an issue hearing your music. I forgot to ask tonight, next time I'm at work I'll ask for what brand they use. Might be worth a look...


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