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 Post subject: Sounddeading Mat
PostPosted: Sat May 17, 2008 7:15 am 
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Ok, did a search and couldn't come up with anything. I want to know if the factory sound deading material is worse than using Dynamat to deadin the car. My girlfriend asked me and I told her I don't really know because I haven't used the stuff. She wants to take all the old sound deading stuff from her Swift and put in the Dynamat stuff. Would it be better or worse? She has a 1998 Suzuki Swift Mk4.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 9:09 am 
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Leave the OEM deadener in there and cover over it with the Dynamat.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 9:12 am 
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I would say remove the old and replace with the new, it should work better and if not it would work just as good. You will also see that there are many places that have no sound deadening material all. So adding to the areas where there is none will help too.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 9:16 am 
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Removing the old is counterproductive. May as well have double the thickness in the oem areas. I could see removing it if your trying to lose weight but since your adding more it won't matter. Taking the OEM off can also be a major PITA.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 12:27 pm 
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Location: Southern Vermont USA
Also bear in mind that Dynamat can be really expensive if you use a lot. Around here it is appx $25 a roll, and that does not cover much. It is also really heavy when you use a bunch and add up all the weight. If your intended application is for a swift/metro and gas conservation is key, you might want to consider removing any useless weight in the car to compensate for the added weight of the Dynamat. I think a roll weighs about 5+ pounds and it takes appx 4 rolls to deaden most of the noisy areas in a car.

edit: oh... and Dynamat works awesome in computer cases if you have noisy fans installed.


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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 12:42 pm 
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^^^ very true. May also want to look into some Dynamat alternatives that are a little less costly (brown bread comes to mind) to buy.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 12:44 pm 
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Location: Palm Springs: Too hot from June to Oct.!
Dynamat Feedback:

viewtopic.php?f=13&t=28801&hilit=sound+deadener+project

Dynamat Alternative:

viewtopic.php?f=13&t=28532&hilit=sound+deadener+project

Second Skin Audio:

http://www.secondskinaudio.com/

Our sound deadener project is not completed, but so far, the dynamat alternative is very quieting...
and much cheaper. Under the hood, and in the engine compartment, the results are this:
No discernable engine noise up to 85 mph. The wind makes more noise than the engine.
Kinda hard to believe.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 1:22 pm 
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Oh, thanks alot for the replys. Well, since she wanted me to put music in her Swift, I made her a list of things she need to get since she didn't want me to buy it, and were she went to buy the stuff they told her if she wanted Dynamat to make everything sound better. Up till now, she said that she wants the Dynamat on the floor and were the speakers go. Should those be the only place or is there some other places I could put because for some reason her Swift is newer than mind but going down the road, you hear more on the inside than my Swift which is from 1989. Could it be that the factory stuff is bad? :huh:

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 17, 2008 1:40 pm 
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If the stock sound deadening crap is anything like what is/was in my car, pull it.

Don't even need heat or chemicals.

Mine was being held down with masking tape from the factory under the passenger side seat, in the spare wheel compartment, 90% of it came out when I slipped a putty knife under it.

If it isn't stuck down, it makes noise, it doesn't deaden anything, since it's vibrating against the metal instead of adding mass. :|

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B. Berry: '90 Chevrolet Turbo Sprint 1.0L 6v SOHC 5sp+ "Mk2" Made in Japan

I got 18MPG in a 3cyl with a 5 speed manual 4dr, '93 Metro! :yeahyeah


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 Post subject: Re: Sounddeading Mat
PostPosted: Sun May 18, 2008 7:54 am 
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Oh, well I will check on Tuesday which is when I will take all the interior apart to run wires and everything and let you guys know what I find. Thanks everybody.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sun May 18, 2008 6:46 pm 
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I have used latex roofing compound mixed with a fine grain sand. This has worked very well. It sticks to everything, it's pretty cheap, it doesn't stink like asphault based products, and it's only about $15 US a gallon.

Using sand is a cheap way to add mass to the compound (that is what you are after to deaden the panels) and you can vary the texture by how much sand you use.

I put it in my friends 4x4 with a lot of sand to help with the noise and it also provided a good non-slip floor to rest you feet on. The only bad thing is that it will scrape the sh!t out of your knuckles if you happen to hit it the wrong way.

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 Post subject: Re: Sounddeading Mat
PostPosted: Mon May 19, 2008 10:13 am 
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Why will it scrap your knuckles? Because of the texture. How well did this method work to bring down the noise?

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 Post subject: Re: Sounddeading Mat
PostPosted: Mon May 19, 2008 4:30 pm 
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I used alot of medium grain sand and it is pretty rough. With a fine grain sand you should be able to get it close to the top surface of a skate board.

When I knock on the panels from the outside there is just a dead thump; so I would have to say it worked very well.

For you I would recommend using maybe 50/50 mix of sand and roofing compound, you can always adjust to suite your needs. It's great for under carpet and in the door panels.

I actually believe that it is very similar in performance to the liquid based compounds found on the market for sound control already.

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 Post subject: Re: Sounddeading Mat
PostPosted: Mon May 19, 2008 5:27 pm 
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Joined: Fri Jul 27, 2007 8:20 pm
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I use brown bread all the time... or rather b-quiet ultimate

http://www.b-quiet.com its cheap, its good and its comparative to dynamat http://www.b-quiet.com/compare.html

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 Post subject: Re: Sounddeading Mat
PostPosted: Tue May 20, 2008 7:08 am 
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Ok, I will update a little later as to the condition of the old stuff. Thanks for the ideas metropwr and swift13b, I think it might be to late for the roof compund/sand mixture though.

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Last edited by a1989swift on Tue May 20, 2008 3:23 pm, edited 1 time in total.

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 Post subject: Re: Sounddeading Mat
PostPosted: Tue May 20, 2008 3:23 pm 
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Update! The old stuff comes off just by prying it with your finger nails!!! :shock: How could this happen? Why is it happening on such a new Swift? Looks like I am going to me using the Dynamat stuff as no place around here carries roof compound.

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 Post subject: Re: Sounddeading Mat
PostPosted: Tue May 20, 2008 3:59 pm 
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Can you please reduce the size of your signature to something a little more tame.

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 Post subject: Re: Sounddeading Mat
PostPosted: Wed May 21, 2008 12:50 pm 
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Sure, changed the photo. Is it ok like that? Any idea about why the sounddeading tar is like the way I said?

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 Post subject: Re: Sounddeading Mat
PostPosted: Wed May 21, 2008 1:48 pm 
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Joined: Fri Jul 27, 2007 8:20 pm
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Location: Saskatchewan
seriously, buy that b-quiet shit I recommended

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 Post subject: Re: Sounddeading Mat
PostPosted: Wed May 21, 2008 3:32 pm 
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Location: Regina, SK
a1989swift wrote:
Sure, changed the photo. Is it ok like that? Any idea about why the sounddeading tar is like the way I said?


The old stuff, is literally just a chunk of rubberized ashphalt, it's stickyness wears off over heating and cooling cycles.

Just the way it works.

B-Quiet Ultimate is the good stuff, their Brownbread and other cheap ones are the Ashphalt types, and really aren't all that great at high temps or low temps.

Dynamat is trash, Dynamat Xtreme is good but way pricey. Get the B-Quiet Ultimate if you can.

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J. McBean: '98 Suzuki Swift 1.3L 16v SOHC 5sp+ "Mk5" Made in Canada
The Mini Rattler: '94 Suzuki Swift .993L 6v SOHC 5sp+ "Mk3" Made in Canada *The Winter Beater*
B. Berry: '90 Chevrolet Turbo Sprint 1.0L 6v SOHC 5sp+ "Mk2" Made in Japan

I got 18MPG in a 3cyl with a 5 speed manual 4dr, '93 Metro! :yeahyeah


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 Post subject: Re: Sounddeading Mat
PostPosted: Thu May 22, 2008 11:14 am 
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Location: Palm Springs: Too hot from June to Oct.!
I used the 'knock off product' here in the extreme heat of the desert with very nice results. Here is a shot of a part of the hood:
Image

It is like a shiny lead finish with a thin inner tube like middle, and a sticky sticky adhesive.
The sound deadener is also against the firewall on the engine side, with no issues.

The door panels get well over 135 F here in the summer, and the "2nd Skin Audio" stays put tightly...

Image

I think the guy selling it is an East Coast transplant to Arizona, and he did his homework.

Noticeably quieter, and you can impress your friends when you rap the hood with your knuckles...no tin can sound.

No, I don't get compensation for bragging about his product. Don't even know the guy.

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Once you get the cars dialed-in (compression, leaks, bearings, alignment, brakes) swap in new rubber and glass, you've got something which should last for years!


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 Post subject: Re: Sounddeading Mat
PostPosted: Fri May 23, 2008 6:28 pm 
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Bought the B-Quiet Ultimate. Got it at Pepboys, no one around here had it. Hum, interesting gamefoo21. Is the heating and cooling cycle you mean like the car body being real hot and then hit it with could water? Because when she really want's to clean her car, she dosen't let it cool down before she hit's it with the hose.

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 24, 2008 1:03 pm 
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Location: Regina, SK
That won't help the glue stay stuck, then you have the age of it, couple that with the constant vibration, and that's how the cheap stuff works loose.

I pulled off the stuff that was stuck to the floor boards under the passenger side with nothing but a putty knife.

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My cars:

J. McBean: '98 Suzuki Swift 1.3L 16v SOHC 5sp+ "Mk5" Made in Canada
The Mini Rattler: '94 Suzuki Swift .993L 6v SOHC 5sp+ "Mk3" Made in Canada *The Winter Beater*
B. Berry: '90 Chevrolet Turbo Sprint 1.0L 6v SOHC 5sp+ "Mk2" Made in Japan

I got 18MPG in a 3cyl with a 5 speed manual 4dr, '93 Metro! :yeahyeah


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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 24, 2008 1:17 pm 
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Oh, well, I installed the new stuff today. Cleaned the floor real good after taking the old stuff out and put the new stuff. I also installed the music and so far everything sounds better then before. Will the mate make the speaker sound louder or no?

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 Post subject: Re: Sounddeading Mat
PostPosted: Sat May 24, 2008 1:39 pm 
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It sorta does ;). When you lower the noise floor of the car (all the sound coming from road noise/environment etc.) it doesn't take as much volume to listen at a given db. So say your car had a noise floor of 80db and you wanted to listen to your music at 20db over road noise you'd need the system to play at 100db. If you install the mat and drop your noise floor to 70db than you only need to play at 90db to attain the same perceived volume. You basicaly get another "free" 10db because the sound isn't fighting the noise floor for volume, so while your system doesn't gain 10db of output (to 110db) the perceived loudness goes up. Make sense? I'm too tired to explain it properly :P. Oh...and thanks for resizing your sig :D

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