View Full Version : Dynomat ?

12-11-2001, 02:00 PM
Has anybody "dynomatted" their car to reduce noise? I am thinking of doing it because my exhaust is causing too much vibration inside the cabin. And noise level seems to upset passengers "slightly".

12-11-2001, 02:34 PM
Dynomat is great for reducing vibration in your car. I used to do competition audio setups and dynomat was my best friend. It's cheap and real easy to apply. The only downside to what you want to do with it is finding the right placement for the mat. With audio it is real easy cause you place it around speakers, trunk floors and such.

If you have excessive vibration due to your exhaust then you might want to check your pipe hangers or get some stiffer rubber mounts on the hangers.

12-11-2001, 02:39 PM
I have a ton of Dynomat in my car and it works pretty well to keep the road noise out and the stereo sound in. I guess in your case it would kind of depend on the 'noise' coming from your exhaust. Is it just because it's kind of loud or because you're actually getting a resonance inside your car? If it's just because it's kind of loud, the Dynomat should help. If it's more of a harmonic resonance, you're probably going to be out of luck there.

You can also solve this problem by telling your passengers that if they ***** about the noise, they're free to walk.

[ 12-11-2001: Message edited by: VeilSideS14 ]

Break Beats
12-11-2001, 03:24 PM
I have a N1 on my car and I had the same problem, it is loud and the sound does resonate in the car. Dynomat is so-so and no way is it cheap. I found something better but for much less than Dynomat. It's called Brown Bread and I did my whole car with it, doors, trunk, under the seats, and the roof. I went full out (Check the pics below). It took me two 70sq foot rolls ($150 per roll, much much cheaper than Dynomat) and I doubled some areas. It works, my car is really quite while driving as compaired to before. It's good stuff I recomend it.

Pictures (http://members.linkopp.com/promo/surfingmoney/sdpictures.html)

Also he sells it on eBay, search for 'brown bread'

12-11-2001, 10:38 PM
Also try http://www.cascadeaudio.com/ , Dynamat is tar based & I read that it may cause an odor in your car, cascade is not.

12-13-2001, 11:41 PM
Thanks guys that helps alot!

12-13-2001, 11:56 PM
what is that brown bread stuff? i've never heard of it and looking at those pictures it looks the same as a bunch of dynamat xtreme. I would like 2 see what the other side looks like. I know there is stuff out there that is about the same as dynamat, if its too much find somewhere that sells bulk rolls of dynamat it'll be just about at cheep. As far as dynamat stinking up your car, the original does stink, but it passes after a while, the Xtreme doesnt. I've got 7 rolls in my car and while it's about $300 bucks worth(not what i paid http://www.freshalloy.com/ ) it is about the best thing i have done for my car.

Break Beats
12-15-2001, 12:36 AM
check out this website for more info: http://www.b-quiet.com/

also here is a review on the brown bread, dynomat, rockford punch mat, dynomat super, ect: http://www.b-quiet.com/test.pdf

The underside of the BB is just black and very sticky, as for the smell, there is none.

07-01-2005, 09:27 AM
Sorry to drag up an old post, but due to the aging of my car, it seems to be getting louder and louder. I would like to do something to keep out the road noise.

Question is, anybody recently used this brown bread stuff? If so, where do you apply it? Do I have to pull the carpet and seats out and apply to the floor?

07-01-2005, 01:30 PM
I've used this stuff w/good results... Cascade (http://www.cascadeaudio.com/index2.htm)

Here is a better link...
Cascade VB-2 (http://www.acousticalsurfaces.com/hvac/vblockvb2.htm?d=26)

I chose this because it is much lighter than asphalt based deadener.


07-01-2005, 03:04 PM
id say go on ebay and buy a box of dynomat. like $150 or so... it should cure it and that should be plenty to do most of the car.

07-02-2005, 12:36 AM
How much does this stuff weigh? About the same as the stock tar stuff stuck in the back? Would it be possible that replacing that tar with dynamat (or whatever brand) might save a few pounds while still staying fairly quiet?

07-02-2005, 07:47 PM

07-03-2005, 08:42 AM
Not sure on the weight, but I'd imagine it will change depending on brand. As mentioned above, Raammat is a good choice as it's 60 mils thick (which is the same as Dynamat extreme) for a whole lot less money.

Also, Elemental designs has some different products. They have liquid that you can paint on... comes in black or blue, also some "studio quality" stuff that's like 70-75 mils thick. Their line is called e.Dead. You can find both their stuff and Raammat on ebay.

07-03-2005, 03:47 PM
Spray-in bedliner works excellent too, and it's way less hassle than cleaning, cutting, and laying sheets of mat everywhere. Weight is about the same, you'll just have to spend a little more to get it done.
I did my entire car from the footwells all the way back, up the quarter panels, above and below the rear deck, basically every exposed inch of metal past the firewall. Before laying it down I taped up all the unused holes and openings as well so it no longer has that swiss cheese look inside the car.
Very quiet, and seals out the heat/cold a little better too.

07-03-2005, 11:03 PM
At one point I was on the fence regarding sound-deadening but opted to not bother. I did the research though and almost bought some raammat, but after reading enough reviews I found that some users experienced problems with the sound deadening adhering for the long term. In the end I saw sound deadening as a weight trade off that I didn't want.

Just do your research and remember google & yahoo are your friends http://forums.freshalloy.com/images/graemlins/grin.gif