View Full Version : Soundproofing
Cuprasport2000
19-06-2002, 09:44
I spent the weekend soundproofing my two Beeza Cupra doors with dynamat. The doors have a much more solid 'clunk' when closing now, but at speed on the motorway there is still a lot of noise. Has anyone on here dynamatted the roof/footwells/floorpan etc? Does it help? I am not sure if it will even help but I would like the cabin to be a bit quieter.:cheers:
About 6 months ago a bunch of us all chipped in together a brought a complete case of brown bread.
I did my Ibizas
Doors
Roof
3 quarters
Boot
Floor
Bulk head
And any large hole was stuffed with pillow wadding, any plastic had a coat of fibre glass added to the back of it.
The reason was my car used to push out 147.6db, alot of pressure to hold in:D
Now i've grown up a bit and have taken the bass box out the car is a solid as a rock very little noise no squeeks etc.
MUCH MUCH better than standard:cheers:
brown bread is 10 times better than dynamat, even dynamat extreme.
Cuprasport2000
19-06-2002, 12:52
I'm not doing it because I have monster sound (mildly uprated) but I had a Mk4 GTI before this and the soundproofing was much better. I still think 13 grand for the car is a bargain and understand they had to cut corners somewhere. I don't really want to strip the whole bloody car though to fit the stuff. (BB or Dyna) Where are the most important or effective places to cover? The doors have definately helped, but I would like it quieter.
Cuprasport2000
19-06-2002, 15:50
Where do I start getting the footwells done then? I had a look at the plastics holding the carpet down around the doors and I cant see how to disasemble to get the carpet up. I dont want to rip the door rubbers up - kinda missing the point soundproofing when there's a whoosh of air coming in through the door!! Any advice will be appreciated.
:cheers:
Cuprasport2000
21-06-2002, 11:14
Can anyone tell me where to start when soundproofing the footwells??? I guess I have to remove the door surrounds but which way does the carpet hinge? Help appreciated... :confused:
:cheers:
utter_hatred
28-06-2002, 13:13
Have dynamated footwells, floor, doors, side panels & boot.
Also stuffed rear quarter panels full of foam.
Road noise is much improved BUT still very high levels of engine/induction/exhaust noise.
Not sure but think bulkhead is major problem and I dont fancy having the dash out!
To do footwells I had all seats/carpets & plastic trim out!
Haynes manual is fairly useful but as per usual is far from comprehensive.
Took an absolute age & still not convinced it was worth it.
Doors are a lot easier.
Still havent put all the trim back in and its so long I cant remember where some of the bits are supposed to go.
Arse.
Good luck, mate.
Cuprasport2000
01-07-2002, 00:16
Cheers! Think I might just watch telly instead then!
Cuprasport2000
What did you Dynamat on the doors? My toledo also lets alot of noise through, and was wondering if I should Dynamat the doors. Have been told that you should do the outer and inner skin of the door?!?? A couple of guy's I know have done the door interiors with a blue liquid based sound proofer and the inside of the doors (I guess the inner skin) with Dynamat extreme, but there BMWs are already much better in terms of road noise than my toledo. In the toledo at least it seems that the noise comes from around the door and not necessarily through the door. I was also wondering how hard it was to pull the dash and soundproof the firewall since the pump diesel tdis are much noisier than the others.
utter_hatred
01-07-2002, 12:57
Jeez. Pulling the whole dash! Rather you than me, matey.
Haven`t got a clue where to start!
KITS_WRC_IBIZA - Do you use just 1 layer of brown bread?
I`ve got 2 rolls I`m considering using on the bonnet - nice shiny metallic finish would look cool but would it get too hot?
Cuprasport2000
01-07-2002, 15:03
Hi PRC,
I only Dynamatted the inside of the doors. I know what you mean by both surfaces but I didnt think that would make a difference at the time. The doors are very easy to do but I guess the rest gets more difficult. I am quite happy with the result though and can hear a difference already. I made sure all the peices overlapped and when you tap the door from the outside it now makes a 'thud' type noise instead of the hollow noise before. I will not bother with pulling the dash out - that seems like too much work to me and I will probably end up with more noise than I started with after all the rattles etc! I am going to have a look at doing the footwells but I am not sure where to start on the dis-assembly. I would also like to have a go at doing the roof as I can hear a fair bit of wind noise through there. I was driving on the motorway yesterday listening for noise and lot of the 'droning' sound seems to come from the rear over the axle. I would like to Dynamat there too but when I come to selling the car I dont want people to think it was in an accident and Im trying to hide it...
The roof sounds like sh&t loads of work to do. I've also noticed that there's alot of road noise coming off the rear axle (when my rear seat is down). I'm not sure if it helps as much but you could try one of those non glued foam liners (I think the dynamat version is called TACMAT) under the carpet up front and in the trunk. Removing the door trim might suffice to do the footwells .
Still wondering if anyone has used the liquid based sound proofer?
davegeorge
06-07-2002, 00:32
Dynamatts roll on product is not designed to soundproof, it is a resonance control product, desigend to turn vibration energy into heat energy.
There are many products available for soundproofing, the best place to start is by upgrading the undercarpet lining with more underlay.
Originally posted by davegeorge
Dynamatts roll on product is not designed to soundproof
Yes it is! It even says so on the box I'm looking at now!!
So far I've used dynamat extreme on the doors (both skins), rear quarter panels and boot floor. The difference is massive. Can't hear the exhaust anymore. The only place letting in noise now is the front of the car. The induction noise and front heat shield rattle :mad: are the only sounds I can hear.
I know where the next place to do is....
Icecavern
27-08-2003, 08:34
Ahhh a thread from when I wasn't around... lol
( Slaps Mike with a wet kipper ) Brown bread is definatley not better than Xtreme... ;)
Reducing road noise is a lot harder than just using damping to stop panel flexing. Start off with door skins and foot wells. The firewall is difficult to get to but would help. Most road noise is from the tyres, suspension, and drivetrain though and there's not too much you can do about it.
Pete