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Dynamat for Road Noise? 

 

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 Post subject: Dynamat for Road Noise?
Posted: Tue Mar 06, 2007 9:50 pm 
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Hey guys, and gals.

Did a search, there is a lot of info for using Dynamat (or similar) to enhance your car audio system, however I was wanting information on using the same material to reduce road noise

I am experiencing a fair bit of it at anything above 70 thanks to the rubber bands that are wrapped around my 19's.

I also want to ever so slightly reduce the interior noise of my exhaust at about that same speed. So, my question is, is Dynamat (or similar) a viable option for achieving this? Or would lining the boot and the floor of my car be an expensive and time wasting exercise with no real benefits?

Thought/Comments welcomed and appreciated. By the by its a 2002 AU3.

--Luke

 

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Posted: Tue Mar 06, 2007 11:09 pm 
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expensive yes. worth it, yes.

 

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Posted: Tue Mar 06, 2007 11:19 pm 
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how expensive would a venture like this be?

 

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Posted: Wed Mar 07, 2007 12:13 am 
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My brother spent $1200 on sound deadening in his Subaru.
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Posted: Wed Mar 07, 2007 9:40 am 
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twirqurky wrote:
My brother spent $1200 on sound deadening in his Subaru.


Sounds about right if you do it all.
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Posted: Wed Mar 07, 2007 1:21 pm 
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what about that sound deadening paint, you can either get brush on stuff, really thick tar based stuff, or you can get spray on cans. don't know if it would work very well??
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Posted: Wed Mar 07, 2007 4:17 pm 
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colin55 wrote:
what about that sound deadening paint, you can either get brush on stuff, really thick tar based stuff, or you can get spray on cans. don't know if it would work very well??


Doesn't do much.
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Posted: Wed Mar 07, 2007 4:47 pm 
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I'd have to disagree with you there.
It may not be the best solution, but I have noticed a big difference in road noise from using it.

Weighing up say less than $100 of the stuff up against $1200 of dynamat makes it seem pretty attractive to me.

It is afterall pretty much what most manufacturers use in the wheel arches of cars.

 

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Posted: Wed Mar 07, 2007 6:08 pm 
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I've redone all the inside of my doors, backs of the door trims, under the boot carpet, side of tailgate, wheel archs, didn't notice squat. Just my opinion.
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Posted: Wed Mar 07, 2007 7:48 pm 
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How thick did you go with it?
If your going to compete with dynamat it's going to have to be pretty thick.

 

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Posted: Wed Mar 07, 2007 10:13 pm 
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If you want a decent job on the cheap (it's 90% of dynamat performance, but 25% the price). Flashtac. It's a roof weatherproofing material, available in rolls from Bunnings/etc.

I've done my boot lid with it. Works great, no more number plate or wing rattle. And the boot closes with a thud.

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Posted: Wed Mar 07, 2007 10:39 pm 
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^ you say thats a weatherproofing material... So that means it also effective as a sound deadner??

 

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Posted: Wed Mar 07, 2007 10:42 pm 
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hmmm might need to get my hands on one of those sound deadeners.

the paint sounds good for its price but if it does squat...I take my money to Dynamat.

phong =P~

 

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Posted: Wed Mar 07, 2007 10:55 pm 
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fordzatmyplace wrote:
^ you say thats a weatherproofing material... So that means it also effective as a sound deadner??

Yeah does the job, bitumen backed with foil.
I did the front doors of my old ED with it, worked pretty well, punchy as mid bass, had to retune the front stage.

 

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Posted: Wed Mar 07, 2007 11:01 pm 
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How do you reckon it would go on the firewall?? my dash is out ATM and i'm looking to add a extra layer of material behind the heater box...

 

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