markc0220k Posted December 4, 2009 Share Posted December 4, 2009 i did follow the Sound Deadening FAQ (thanks Sands). but i'm little bit confused about #3, i did front door and trunk, yeah i could tell the noise from mid and trunk areas (drum effect?) is much improved. just because those areas becomes quiet, now the noise from suspension is much pronounce (or annoying?). i'd knocked around like the way i decided spots to dynamat my doors/trunk, but nearby suspesion, i couldn't find which sheet of metal is/are obviously weaker. So, can anyone show me where i should dynamat at four corners to reduce suspension noise please? thanks mark Link to comment Share on other sites More sharing options...
tangcla Posted December 9, 2009 Share Posted December 9, 2009 Just go nuts Link to comment Share on other sites More sharing options...
markc0220k Posted December 10, 2009 Author Share Posted December 10, 2009 means ... ? Link to comment Share on other sites More sharing options...
RedDawg Posted December 10, 2009 Share Posted December 10, 2009 to quiet suspension noise i would think you should apply it to the wheel wells and floor Link to comment Share on other sites More sharing options...
markc0220k Posted December 11, 2009 Author Share Posted December 11, 2009 to quiet suspension noise i would think you should apply it to the wheel wells and floor pics please? Link to comment Share on other sites More sharing options...
CDN 2.5i Posted March 6, 2010 Share Posted March 6, 2010 some good pics in this thread here: http://legacygt.com/forums/showthread.php?t=86076 I'll be putting down mass loaded vinyl over top of a decoupling layer of some sort, foam or something similar, to cut down on road/exhaust noise. Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted March 8, 2010 Share Posted March 8, 2010 don't over think it. rap your knuckles on every metal piece you can find. If it resonates more than you like, put sound deadener on it. If it doesn't resonate before or after applying sound deadener, then you are done, and move on to the next section. FWIW the Sands write-up has statements that can be true but definitely have a false basis. You are adding mass to change a panel's resonant frequency. Absolutely nothing else. FWIW my rear wheel wells needed very little sound deadener. The pass side was rock solid already. The driver side needed a tiny bit more. I did find some crazy trouble areas though (flat section between wagon lights and wheel wells, spare tire well, rear side panels.) [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
CDN 2.5i Posted March 8, 2010 Share Posted March 8, 2010 don't over think it. rap your knuckles on every metal piece you can find. If it resonates more than you like, put sound deadener on it. If it doesn't resonate before or after applying sound deadener, then you are done, and move on to the next section. FWIW the Sands write-up has statements that can be true but definitely have a false basis. You are adding mass to change a panel's resonant frequency. Absolutely nothing else. FWIW my rear wheel wells needed very little sound deadener. The pass side was rock solid already. The driver side needed a tiny bit more. I did find some crazy trouble areas though (flat section between wagon lights and wheel wells, spare tire well, rear side panels.) To echo that sentiment - it's usually the flat panels that are the worst offenders. The wheel well itself is probably quite rigid and won't need much dampener. That said, I plan to cover mine with mass loaded vinyl to block the sound - something the dampeners by themselves don't do all that well. Link to comment Share on other sites More sharing options...
markc0220k Posted March 8, 2010 Author Share Posted March 8, 2010 the most noticeable diff before-and-after is both front doors and spare tires tub. but i'm thinking what to do to reduce those suspenion noise...? Link to comment Share on other sites More sharing options...
ClimberDHexMods Posted March 8, 2010 Share Posted March 8, 2010 To answer your original question, I had a lot of trouble reducing resonance on a piece of metal that I think is just inside of the visible rear wheel wells. Though the visible stuff is really solid, something under it somewhere is not good at all. But you would have to do some serious taking things apart to find it. Sorry, but this is a really tough one. [CENTER][B][I] Front Limited Slip Racing Differentials for the 5EAT now available for $1895 shipped, please inquire for details! [/I][/B][/CENTER] Link to comment Share on other sites More sharing options...
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