Dynamat whole interior?

[BAC5.2]

Anyone done it?

The road noise is deafening in my Forester, and the sound of hard rain on the roof is also annoying (it's like resonating in a tin can between the headliner and the roof skin).

I am thinking about dynamatting the whole interior (using "Rattletrap" which is an 80mil variant of sound deadening similar to Dynamat). I'd probably double layer it.

I'd do the whole floor, roof, door's, and pillars. I don't care if it adds 60lbs to the car, as long as it's quiet!

Any one have any experience with this, or with Dynamat in general.

Do I have any other options to reduce road noise and decrease in-car sound levels?

Thanks!

Phil

[sheepdog]

I dynomatted my 66 mustang through and through, and it made a world of difference. Road noise was significantly reduced, and I got rid of that same rain sound you are talking about. I'd reccomend it if you arent worried about weight.

[warrior]

Before you do that, you may wnat to check out this stuff

www.quietcar.net (http://www.quietcar.net)

[Huffer]

I used Dynamat Xtreme - pretty light (1 sheet) and it made a pretty good difference to my rattle can Impreza.

I found out who the distributor was, and bought directly from them as it was cheaper than buying retail.

You could also try using quieter road tires, I find some brands are quite a bit noisier...

[BAC5.2]

That's the problem.

All the tires I want to use are loud. I'm not willing to sacrifice tire performance. My current tires are fairly quiet (Toyo Proxes 4's) and they are the "lowest" performance I'll go.

On a scale of 1-10 how noisy was it before and after?

The Rattletrap stuff is like $109 shipped on e-bay, and it's 100sq.ft. I think two rolls would do me just right for two layers. What do you think sheep?

Huffer, how much did you pay? The Bulkpak was like $210 retail. Ebay was like $150. But Dynamat Extreme is only 45mil thick wheras the rattletrap is 80mil thick (40mil = 1mm).

I'd say the Forester is about a 7 on the 1-10 scale. I'd like it to be a 1 or 2. Total silence. Will dynamat/similar material do this for me?

[JMoney]

My current tires are fairly quiet (Toyo Proxes 4's) and they are the "lowest" performance I'll go.

I know that my FZ4's were so loud I couldn't stand it. When I "upgraded" to Cooper Zeons they made a world of difference as far as road noise.

[sheepdog]

Tire noise will get transferred into the interior a lot easier than regular road noise. However, two layers should be sufficient, although I used Dynamat extreme and not the other stuff. You'll notice a definite difference, however I'm unsure as to whether itll be a 1 or 2.

I'd also consider that paint on stuff, its heavy, but if you dont care about weight it looks like good stuff if it does what it says it does.

[Huffer]

That's the problem.

All the tires I want to use are loud. I'm not willing to sacrifice tire performance. My current tires are fairly quiet (Toyo Proxes 4's) and they are the "lowest" performance I'll go.

On a scale of 1-10 how noisy was it before and after?

The Rattletrap stuff is like $109 shipped on e-bay, and it's 100sq.ft. I think two rolls would do me just right for two layers. What do you think sheep?

Huffer, how much did you pay? The Bulkpak was like $210 retail. Ebay was like $150. But Dynamat Extreme is only 45mil thick wheras the rattletrap is 80mil thick (40mil = 1mm).

I'd say the Forester is about a 7 on the 1-10 scale. I'd like it to be a 1 or 2. Total silence. Will dynamat/similar material do this for me?

Lot of questions, I'll try to answer.
I ran Goodyear Eagle F1's on the Impreza - not much road noise, considering their excellent wet/dry grip. So I would use those again, but not in my current region due to the bad roads. Good roads are quieter, faster.

I didn't Dynamat the entire car - just certain sections - the doors and part of the rear section. I didn't want to add too much weight, but I wanted to improve in-cabin acoustics. I found that the sound from my speakers was dramatically improved, the frame-less doors closed with more of a "thunk" than the traditional rattle, and overall roadnoise was less.

Don't get hung up on the THICKNESS of the material - it's the sound deadening properties you need to consider. Dynamat Xtreme (when I used it, which was a couple of years ago) was 1/3 the thickness of regular Dynamat, weighed less and eliminated more sound. Dynamat had very good acoustic tables about what frequencies were blocked.

The price I paid is irrelevant, because I paid it in NZ$ and did the install in New Zealand.

Still, I wouldn't hesitate recommending it as a good, lightweight option. It's incredibly easy to work with.

[Wiscon_Mark]

I've been thinking of using a rattlecan of dynamat on the inside of the tire wells (ya know, the plastic fenderwell covers) to see how much that'll reduce sound.

[sheepdog]

The sound comes through you're suspension mark, I don't think itll make that much of a difference