Sound Proofing

[madmanluke]

hey guys,
done a quick search for sound proofing but doesnt look like its been covered much?
im not stranger to car audio and have my self pretty well hooked up.

im after some advice with sound proofing the car though. i have quite a boomy back box (lovley all the time untill i hit the motorway and have it at constant revs) which seems to drown out the subs quite a bit, even through just normal traffic, unless i crank it up. i also get quite a bit of road noise, i.e tyres on the tarmac and engine noise through the doors i can only assume.
have any of you guys fully sound proofed your mk2's, i.e boot floor and doors.
what stuff did you use?
im looking to only spend around £200 at an absolute maximum on doing this so if any one has any experiences with much cheaper stuff, dont be shy!
any advice as to doing this would be greatly appreciated, i.e where to really mount the stuff up to prevent excessive noise coming through etc

Cheers!

thanks

[Shady Pioneer]

I believe there is a much cheaper alternative to Dynamat, can't remember what people use but it is there. I'd like to sound proof my whole car soon, maybe in the summer as I'd like to maxmize sound inside the car

[tommk3cab]

I believe there is a much cheaper alternative to Dynamat, can't remember what people use but it is there. I'd like to sound proof my whole car soon, maybe in the summer as I'd like to maxmize sound inside the car

its called flashing tape. You can get it from B+Q

use enough layers and it will work, anything which adds weight will work.

[VR6_ROB]

i have heard reports flashing tape is not very good as you need to put loads on

why not try some of these

dynashield
bodyline
extreme

I have heard good feedback on extreme I think thats what i will be using

[tommk3cab]

i have heard reports flashing tape is not very good as you need to put loads on

Its a bit of a toss up between the results you want and how much you are willing to spend. Use enough flashing tape and it will be just the same, depending on the bond you achieve.... A downside is you may end up not being able to wind your window down though

[madmanluke]

thanks for the reply guys.
Ok say if I had a budget of around £200 - £250 to get this done. I want to at least deaden the sound from the outside enough to remove road noise etc. I.e enough, but not too much. What would you lot reccomend to do the job?
Where would I get the stuff from also? Your average bnq etc?
Cheers

[Len]

Its not really the weight but to stop metal panels resonating. Its down to harmonics really. metal panels all vibrating at different frequencies.
If you deaden them less background sound gets created.

Sound proofing is done with absorbant material, like felt type matting.

Best place for a starting point is under the back seat! On most models there is nothing under there!
The other most important place is the doors. Best on outer skin.

[Ben Lessani]

Tonne of 'sound' information in here ...

http://www.golfgtiforum.co.uk/index.php?topic=96439
http://volkswagen.msk.ru/forum/index.php?showtopic=96513

[Len]

If you want to go really cheap you can use flat roofing felt with the mastic adhesive!

[tommk3cab]

Its not really the weight but to stop metal panels resonating. Its down to harmonics really. metal panels all vibrating at different frequencies.
If you deaden them less background sound gets created.

Sound proofing is done with absorbant material, like felt type matting.

Best place for a starting point is under the back seat! On most models there is nothing under there!
The other most important place is the doors. Best on outer skin.

depends if you are talking about sound deadening or proofing. being in the audio section I was assuming deadening.

If you want cheap sound proofing then the stuff you will want are carrymats. They are used for camping and are thin and made of foam. They work wonders and are apparently identical to the more expensive dedicated soundproofing you can buy.