Sitting around thinking about working on the car I don't even own yet... and got to wondering....how quiet inside could I make the cabin with dynamat etc.? I would like to get the inside tight and quiet as possible. Have any of you had this same mission and how successful were you?
I have been experimenting with this on a couple of cars, including the Maverick, that have fairly terrible sound deadening and significant noise transmission through the chassis. I have had some luck with dynamat, dynamat extreme and some of the other variants but I think adding a thicker padded mat (like jute or acoustic mat like in newer cars) in certain areas like above the headliner, behind the quarter trim panels, in the rear deck, under the seats and firewall areas as well as in the doors would be very beneficial. I think the Mav is still limited to a degree from outside noise due to the lack of acoustic glass and marginal weather sealing abilities. I would stay away from anything that retains moisture due to mold and rust potential. I had a remarkable improvement with a 1985 EXP turbo car with standard dynamat and jute padding in the cargo area. I swipped a firewall hush mat from a later model Escort and supplemented it with dynamat as well. It went from feeling like and sounding like a tin can to a solid tight car and I'm still in the process on my current Maverick. Keep us up to date on what you find in your own research. Good luck!
Sound can be absorbed or reflected. LOw frequency sound, vibrations are hard to reflect. Lead is best but heavy so dense butyl rubber is used in housing construction, and cars. 2lb per ft stuff from home des-pot is good but no adhesive. Dynamat, Fatmat, etc.... same stuff with fancy Chip Foose endorsement. Small gaps in insulation can negate all you efforts; it is really important to seal all holes/ gaps. I used Noxudol (google it) and painted it on with a brush.1'4" thick or more! Inside of doors, under headliner behind C pillars. Wheel wells (road noise)are really loud, so use undercoating or truck bed liner outside car, 1" lead foam mylar (boat stuff in 3x5 sheets) against firewall and behind rear seat! Then put on a set of target shooting earmuffs and you're done
Ok, what exactly is peel & seal and where do you get it? I've heard home depot mentioned but what department?
Lowe's ...lots of talk on here...search...Peel and seal... http://mmb.maverick.to/showthread.php?t=76291&highlight=Peel+seal
http://www.lowes.com/pd_154017-81326-PS625_0__?productId=1018733 How is this different than dynamat...or is it?
i dont know peel an seal but its all about density... 2 lb per foot rating was the most dense I could find. Anechoic Chamber.. google that under images
I used Peel and Seal, and it worked great. Put it on the floor, in the doors, and along the firewall. Made it real quiet. But then I replaced my weather stripping and that made even more difference. I would have put it up in the roof, but didn't want to mess with headliner at all. I also put sound deadener foam inside the back seat.
For you guys who have uaed the peel & seal, how many rolls do you think it would take to do the whole passenger compartment floor and roof? And how much does each roll weigh?
I used 10 rolls...3 layers on cowl/firewall/toe board...2 layers behide kick panels, back-side of quarter panels, rear tire housing, floor and doors...one layer on the roof and one small strip on the back-side of the dash board. I haven't done the trunk area (yet). I stopped about 6" into the trunk area. If I remember correctly, each new roll weighed 7 lbs. I didn't weight the cardboard tube and backing paper that got thrown in the trash. May I suggest you relocate the fusebox, if you go that deep into your project, if you have it out. One of the best mod I ever did. Here are some pics of my sound proofing project http://1bad6t.com/Maverick/maverick_34.html then click >Next Page< at the bottom to see behind the headliner
Wow you have almost 70 lbs of sound deadener! Are most people using multiple layers or are some using single layers? Is a single layer effective or are you wasting your time? Although mine is not going to be strictly a track car ~ I am conscious of adding weight.
I used about 8 rolls myself. I would put on the first strip, then the second strip half way over the first one. Basically making two layers. If you are worried about weight I would not put any sound deadener. As they are all fairly heavy. But having said that, one layer will quiet it down and fix any rattle issues.
