 sound proofing, what is the best method or methods |
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| pete-stevers |
 Jan 20 2007, 04:52 PM
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#1
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saved from fire!  Group: Members Posts: 2,642 Joined: 10-October 04 From: Abbotsford,BC, Canada Member No.: 2,914 Region Association: Pacific Northwest 
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jsut wondering
i put dynamat on the interior side of the fire wall on harlot..it deadens the sound...but not enuf would putting a double window in work....completely sealed all the way around but two mils apart??? any other ideas how bout sound adhesive on the engine side any other materials that might work better.... |
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Replies(1 - 16)
| dflesburg |
Jan 20 2007, 05:04 PM
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#2
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Senior Member Group: Members Posts: 1,720 Joined: 6-April 04 From: Warm and Cheerful Centerville Ohio Member No.: 1,896 Region Association: None |
dynamat on firewall, underside of carpet, floor board area, inside door panels, engine bay side of firewall (engine bay dynamat)
300 watt amp extra speakers I don't know the results yet but will soon... (almost there, Almost There, ALMOST THERE!!!!) |
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| pete-stevers |
Jan 20 2007, 07:17 PM
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#3
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saved from fire! Group: Members Posts: 2,642 Joined: 10-October 04 From: Abbotsford,BC, Canada Member No.: 2,914 Region Association: Pacific Northwest
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did you dynamat the lower portion of the engine compartment?
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| banger |
Jan 20 2007, 07:43 PM
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#4
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Member Group: Members Posts: 354 Joined: 12-November 06 From: Santa Clarita Member No.: 7,205 Region Association: Southern California |
You can also add wool carpet padding, and dynamat the targa top, add wool padding there as well, then add a foam backed fabric headliner. Also make sure you have a rain tray, since this will cut down the noise. There is a guy on ebay that makes custom sound padding for the porsche engine compartments. He can make them for the 914 as well. He goes by APPBIZ on ebay. I would dynamat the engine compartment, then add his pad over the dynamat, then it should be pretty quiet.
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| craig downs |
Jan 20 2007, 08:02 PM
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#5
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Senior Member Group: Members Posts: 768 Joined: 25-November 05 From: mira loma ca. Member No.: 5,189 Region Association: Southern California |
I'm going to use Quiet Car its a spray on sound deadiner. Their web site is
wwwquietcar.com with some good imformation |
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| Crazyhippy |
Jan 20 2007, 08:20 PM
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#6
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Insert witty comment here... Group: Members Posts: 1,659 Joined: 28-July 05 From: Home of the Coyotes, AZ Member No.: 4,493 Region Association: None |
Earplugs??
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| Hammy |
Jan 20 2007, 08:25 PM
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#7
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
I know sound padding on the engine bay side of the firewall will reduce noise more than on the interior side. If you do put any sound padding on the engine side, make sure it's easy to access and/or remove for routine cleaning behind it. Or else your firewall is prone to rust easily.
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| brer |
Jan 20 2007, 08:57 PM
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#8
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Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
Quiet car is the same as QuietKote... which is available as an industrial item for less money. We use it, and I have used it in my Subaru with excellent result.
Water based, spray on several coats, and it can then be painted over with automotive paints. you can brush it on if you dont mind the messy texture. (IMG:style_emoticons/default/smile.gif) |
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| Heeltoe914 |
Jan 20 2007, 10:11 PM
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#9
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Senior Member Group: Members Posts: 1,135 Joined: 31-January 06 From: Tujunga Calif, Member No.: 5,506 |
I used Dynamat on floors, inside Longs, firewall, inside cabin, inside doors and on the eng lid. Works very well no earplugs needed.
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| brer |
Jan 20 2007, 10:17 PM
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#10
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Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
find anything at pomona leamon?
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| IronHillRestorations |
Jan 21 2007, 12:40 PM
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#11
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I. I. R. C. Group: Members Posts: 6,731 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
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I've been using B-Quiet's "Brown Bread" sound mat, which is very comperable to Dynamat and much less. Here's a pic of a job I used it on. I've got plenty on hand if you are interested, pm me.
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| Hammy |
Jan 21 2007, 05:01 PM
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#12
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mr. Wonderful Group: Members Posts: 1,826 Joined: 20-October 04 From: Columbia, California Member No.: 2,978 Region Association: Northern California |
QUOTE(9146986 @ Jan 21 2007, 10:40 AM)  I've been using B-Quiet's "Brown Bread" sound mat, which is very comperable to Dynamat and much less. Here's a pic of a job I used it on. I've got plenty on hand if you are interested, pm me. How much of a difference did you notice? |
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| anthony |
Jan 21 2007, 06:02 PM
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#13
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2270 club Group: Benefactors Posts: 3,107 Joined: 1-February 03 From: SF Bay Area, CA Member No.: 218  |
I've also heard good things about Brown Bread and it's price relative to dynamat.
http://www.b-quiet.com/ FWIW, there are two ways to sound deaden. One is to block vibration and one is to block sound. The highest level of sound absorption is achieved with both methods. For example, first use the Brown Bread stuff or equivalent dynamat on the metal panels. That stuff blocks vibration. Then do a layer of B-quiets Vcomp or a similar product. Actually, the stock backpad blocks a lot of sound. Also, use a stock air filter and stockish exhaust if you want a quiet 914. |
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| IronHillRestorations |
Jan 21 2007, 07:53 PM
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#14
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I. I. R. C. Group: Members Posts: 6,731 Joined: 18-March 03 From: West TN Member No.: 439 Region Association: None
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QUOTE(Hammy @ Jan 21 2007, 03:01 PM) QUOTE(9146986 @ Jan 21 2007, 10:40 AM) I've been using B-Quiet's "Brown Bread" sound mat, which is very comperable to Dynamat and much less. Here's a pic of a job I used it on. I've got plenty on hand if you are interested, pm me. How much of a difference did you notice? I think it helped. It's not my car though, so it's hard for me to say. Personally, I think it's not a bad idea for a custom car, I wouldn't use this exact product on a concours resto because of the shiney foil, but functionally it works as well as most other adhesive bituminous mat products. |
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| drive-ability |
Jan 21 2007, 11:08 PM
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#15
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Senior Member Group: Members Posts: 1,169 Joined: 18-March 05 From: Orange County, California Member No.: 3,782 |
QUOTE(Crazyhippy @ Jan 20 2007, 06:20 PM) Earplugs?? The only thing that works!!!! (IMG:style_emoticons/default/agree.gif) Dual pane rear glass (IMG:style_emoticons/default/chair.gif) |
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| John |
Jan 21 2007, 11:31 PM
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#16
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member? what's a member? Group: Members Posts: 3,393 Joined: 30-January 04 From: Evansville, IN (SIRPCA) Member No.: 1,615 Region Association: None |
Ear plugs.
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| SLKWrx |
Jan 22 2007, 07:47 AM
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#17
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Member Group: Members Posts: 318 Joined: 28-September 04 From: Woolwich, NJ Member No.: 2,845 Region Association: North East States
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There is another company out there for sound deadening that I have been faithful toward for a long time. www.raamaudio.com His Raammat product is very impressive and cheaper than a lot of the competition. Also Rick takes great pride in his work. I have completely done 3 cars in raammat with great success.
Just another option to put out there. |
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