Dynamat in the trunk
 

Hey everyone! While I'm waiting on my clutch to be shipped, I decided to isolate my trunk from all the road noise and mainly because of the Tomei exhaust I have. So far I've stripped the trunk, which took me around 20-30min because I had to look up where the pins are located at. Anyhow, I will keep updating this thread as I'm making progress.

Dynamat: $150 from Amazon
http://imageshack.com/a/img537/5906/LURYTr.jpg

http://imageshack.com/a/img911/8258/OOkukF.jpg

http://imageshack.com/a/img661/346/t4qv6w.jpg

Random bolt under the foam...
http://imageshack.com/a/img661/2986/NxvZ5E.jpg

http://imageshack.com/a/img540/6572/AxPX90.jpg

Next step: Cleaning.

Do they recommend anything,or just soap and water?

Nice! I have been meaning to do this but don't want to spend that much on dynamat - I've heard there are better alternatives.

Just irritated by road noise, luckily the Ark CBE isn't that loud on normal driving :)

Yes. I vacuumed, cleaned with a wet towel, and then rubbing alcohol. The surface has to be clean in order for the dynamat to stick well. You don't have to clean as much as me if your trunk is somewhat clean. I'll recommend rubbing alcohol though.
Here is the result.

http://imageshack.com/a/img540/3418/LswcM8.jpg

Next step: Putting the dynamat(which I've already started). I'll try to finish today after work.

I hear you. But for $150 I'd rather try to isolate as much as I can. I even measured the decibels in my car at idle(low 20s). So I'll compare afterwards and let you know.

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If you put a layer of closed cell foam over the dynamat you'll get a much better result. Google "ensolite". It's cheap, light and self-adhesive.

:iagree:

Dynamat is just a vibration dampener. The CCF is the stuff that actually helps with noise.

No need to pay for the Dynamat name. I used GTMat's Onyx product (they are local). It cost <$50 to do the entire hatch.

I'll first do the Dynamat and then if I'm not satisfied with the results I'll try what you suggested. Thanks for the tip! :tiphat:

Honestly, why put the plastics back in to pull them out again? You'll be much happier in the long run if you drop $50 on some foam before you button everything up. It does much so more than the dynamat.

My back would not have given me the option to do this project twice. Leaning over the hatch for hours gets really old.

You are right. I'm not sure if I can post links here but is this the foam you are talking about? http://www.raamaudio.com/ensolite-iu...on-the-market/
I wonder if I can buy it locally instead of waiting to be delivered?

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That's the stuff.

Here is the update.

http://imageshack.com/a/img912/2417/RgHGxM.jpg
http://imageshack.com/a/img540/7259/ydEGfq.jpg
http://imageshack.com/a/img901/8351/kJDpdE.jpg

I still have 1 more day worth of work till I finish it completely. I have a question though. Do you guy think I should put dynamat on the middle divider(across the 2 fenders) ? Oh, car sounds quieter even now, I test drove it :)

What about this product? Sound Dampening, Vibration Damping, Thermal Insulation for automotive applications - HUSHMAT.

That's why I just decided to climb into the hatch. Also it was a good avatar photo op :icon17:

I put material on the middle divider.

Wow ... you still have a whole day left? I think I did my entire hatch in about 6 hours minus an hour or two for breaks. I was working from 12" squares though, so I did very little cutting until I was filling in the last areas.

Looks good man, now that extra umph in the back will help u hit the corners on the drift better...

Keep the updates coming! I almost did this last week and will eventually get to it.

Chuck, I think you just sold me on a kit from RAAMaudio. I'm thinking about purchasing the "Package 1" kit today that includes 37.5 sq. ft. of their BXT II sheets and 41 sq. ft. of their Ensolite.

That's what I used. It's not a bad deal at all.

That's awesome. Keep the updates coming.

Any recommendations other than the product itself? Install tips, things you'd try differently? Notice a good improvement?

It was a pretty good improvement. I just did the hatch and back side of the wheel wells. I've got a lot more to do in the future. It's fairly unpleasant to install since you're leaning over for hours, but it's not hard. Be careful with the deadener. The metal backing for it is SHARP. Wear gloves or it will cut up your fingers pretty bad.

Thanks, Chuck. I'll start with the hatch too and move to the doors next in the near future, as well.

Sorry for misrouting the thread, OP. I'll shut up and tune in for updates. :tiphat:

By a day I mean 2 hours. I've worked total of 4-5 total. I think I'll need a couple of more to finish it.

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you need to be a tiny little asian like myself so you can sit in the hatch comfortably :bowrofl:

i used hushmat, it's great. i'd also suggest using gloves if you were using it as the aluminum top can get sharp and i found myself with a lot of cuts on my hands the next day.

it's pretty easy to install and easy to cut with a good pair of sheers or a sharp razor.

aside from what most people said i also suggest getting a roller to help press the product to the panel/surfaces. i improvised and got a bedframe wheel.

i'd also keep a pair of sheers/fresh razor handy so you can make cuts/adjustments as you are installing.

wear thin gloves if possible i found myself getting a bunch of mini cuts from the sharp edges of the hushmat

i have done my doors and rear hatch and i have noticed the biggest improvement in the form of no 'ding-ing' when going over gravel or dirt and less 'raining' sound when driving on wet surfaces. the actual road noise is mildly quieter but i wouldn't say it's super quiet like a lexus. that said i was able to hear my exhaust and engine (stock at the time) a lot more clearly. :excited:

Use some gloves or something. I cut my goddamm fingers 7 times( wish I was kidding lol). Use a small roller to press on the dynamat. You can also use a tennis ball for the weird curves. Start with the bigger pieces/areas first so the left over material can be used for patching. Don't be afraid to get in the trunk, I'm almost 6'"3 190 pounds and it was fine. Oh, dunt forget to pull the e break hehe

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:iagree:

Also, the rounded butt end of a screwdriver seems to be the perfect tool to get in some of the smaller curved areas.

Here is the final result. It helps; now I can have normal convo in my car :)

http://imageshack.com/a/img538/2276/sqOzq2.jpg

http://imageshack.com/a/img661/992/MR8JMg.jpg

http://imageshack.com/a/img673/227/3cuXhi.jpg

http://imageshack.com/a/img909/1385/WegAif.jpg

Very clean. If you want quieter, go back and do the fenders. That's where a lot of the noise comes from. I used nearly 2 boxes of Dynomat. There is not an inch of bare metal showing from the seats back in mine.

Yeah, I know fenders let a lot of noise. I was so tired/impatient at this point that I couldn't care less about the spots I missed lol

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A side note, I noticed the noise from the fender area as well, not as much from the trunk side, can we get better fender wells/covering on the underside or is the CCF on the fenders the best bet?

You have a local contact? Send me a PM, I might pay them a visit or just an email - trying to get an idea of how much they charge? I might just do it myself on a saturday, though.

This. It's really tedious, but not hard. I can imagine the labor on this being really high.

It took me 3 days x 2 hours every day after work. Now, the labor is simple enough, however it's tiring. You are either bending over the trunk or cutting the dynamat inside the trunk (unless you want to get out of it every time you need to cut something).

Spent about 4 hours yesterday on my hatch and have it finished up with the RAAMmat BXT II sheets from RAAMaudio. The application was pretty lengthy and tedious like others have said but I this stuff is really flexible and applied very well. Applying the Ensolite foam over it tonight before putting the plastics back in.

The "Package #1" that I bought was the best deal I found and had to pull the trigger last week. It came with 20 sheets of BXT II material (37.5 sq ft) and 3 yards of Ensolite foam (41.625 sq ft). Thanks again, Chuck, for recommending this product.

Excuse the microfiber towel and windex in the hatch :tup:

How much sq ft do you want of which product? In addition to the Onyx butyl product I used, they also have a product called Quadro, which is essentially the Onyx butyl product with foam already adhered to it. Pretty convenient, but I have zero experience with it.

And btw, I did the install myself. So that price was just for the Onyx product I purchased, not any labor. I did my hatch install in approximately 6 hours with four 30 min breaks.

No idea how much sq ft I need but I want to cover the rear fenders and trunk - that quadro stuff sounds like it has both the deadening and vibration material.

My other question is if we need to entirely cover everything? The CLD Tiles site mentioned just putting it in patchy spots as you don't need to cover everything - is that the same for this stuff?

I think to cover the whole hatch it takes around 30 sq ft of material. ;)

You don't need to cover everything, I haven't. The more you cover the better the isolation.

So what is the final dB measurement?

In for final before and after dB readings!

FWIW, I think the CCF is the stuff that will really affect dB readings. I borrowed a dB reader and the difference between my before and after readings was statistically insignificant with just the vibration dampener installed in my hatch. Even the difference between my before readings with the hatch completely bare and after with the Onyx installed and the spare tire and all panels put back in the hatch was very minimal.