I've layered the in-car floor pan of my AWD with Dynamat but there's still a bomb-load of road noise. I've only been able to do about half the height of the firewall too.

I need to buy some more dynamat but so I can get the correct amount, I need to clarrify;

To kill the road noise I need to do the doors really don't I?? And for the folks who've already done it, how effective was it? I guess doing the boot would be necessary too. I'm gunna be broke after this 'little' adventure :shock:

Yeah you should do the doors, if not for your road noise, it will benefit your speakers. I used half a sheet on the inner door around and behind the mid woofer and a hole sheet on the outer skin of the door ( the bit you can directly see when you take the trim off ). Did heaps more than putting it on the floor.

Boot will only help stop rattles and reduce cancellation of your sub bass. Perhaps you should look at quieter tyres as well if you want to reduce ambient noise???

yeah, ditto for looking at quieter tyres.

I've layered the in-car floor pan of my AWD with Dynamat but there's still a bomb-load of road noise. I've only been able to do about half the height of the firewall too.

I need to buy some more dynamat but so I can get the correct amount, I need to clarrify;

To kill the road noise I need to do the doors really don't I?? And for the folks who've already done it, how effective was it? I guess doing the boot would be necessary too. I'm gunna be broke after this 'little' adventure :shock:

to Kill road noise from the boot you need one of those rubber boot liners - Genuine from Mitsu about $175 or OEM off Ebay about $90 (but the Ebay ones aren't as thick). They completely kill the road noise - even better if you put a layer of underfelt under it.

to Kill road noise from the boot you need one of those rubber boot liners - Genuine from Mitsu about $175 or OEM off Ebay about $90 (but the Ebay ones aren't as thick). They completely kill the road noise - even better if you put a layer of underfelt under it.

Thanks guys. I already have a rubber boot liner.

What about the roof?? Thoughts?

I think this link is pretty good regarding sound deadening and the differing materials for doors vs floor vs boot vs roof.

http://www.mobileelectronics.com.au/forums/index.php?showtopic=50295&view=findpost&p=954892

(Post 160 in this thread)

Thanks guys. I already have a rubber boot liner.

What about the roof?? Thoughts?

wow mate,,,, what are u trying to make it so quiet u can sleep in there or something?? me thinks u need a louder exhaust or stereo.... that way u wont have any noise...

however i doubt doing the roof would really make much difference, although if ur goin to this much effort why not... also I think a huge contributor to road noise is the plastic triangles on the front door near the mirror there... seal those up and u will notice a massive difference.

Ok guys. Car audio is a passion of mine, but I tend not to post much on the Audio section of this site. My time is Sound quality, so i know a bit about what you are trying to achieve.

I can tell you now that Dynamat Extreme is fantastic stuff, but, will NOT get ride of road noise to the levels that you are looking at.

There are massive write ups on www.caraudioaustralia.com regarding what is best to combat road noise. The most practical idea is to go down to jaycar, and get the sound insulation, looks like thick carpet, and works wonders.

If your wanting to spend a little more, then Dynapad is probably some of the best stuff on the market :)

I think this link is pretty good regarding sound deadening and the differing materials for doors vs floor vs boot vs roof.

http://www.mobileelectronics.com.au/forums/index.php?showtopic=50295&view=findpost&p=954892

(Post 160 in this thread)

From what I can remember ...

To get minimize road noise:
1) Put underlay on the floor pan (instead of Dynamat)
2) Paint the wheel arches with sound deadener.

With doors, some say you should do the enitre door, others say just a little bit is fine - I guess it depends on whether your aim is to prevent road noise or to improve the performance of your speakers (less vibration).

Can't really remember much about the boot or the roof.

If your going to all that extent, why not just buy a better car that is much much quieter from factory? And again, what is the point?

I just got a louder stereo to stop hearing any rattles etc. Cars are ment to be loud :D

If your going to all that extent, why not just buy a better car that is much much quieter from factory? And again, what is the point?

I just got a louder stereo to stop hearing any rattles etc. Cars are ment to be loud :D

Then I'd just have another Bimmerdore ;)

Just want to make the car more comfortable since it'll be around for a few more years.

I believe that sound deadening the doors is the most important part in reducing road noise after finding that most of my road noise was reduced by Dynamatting my doors and using the left overs for the parcel shelf. I also put foam underlay under the cabin floor carpet, behind the rear seat backrest and in the boot and it's very quiet. However, little things like the odd plastic on plastic creaks inside the car tend to make their presence felt because the cabin is otherwise much quieter. Perhaps a more effective method of sound deadening the floor pan is a tar based spray against the underbody and wheel arches thereby reducing noise before it can enter the cabin. I had this done before I picked up the car and the different on the test drive without it and after when I picked it up was very noticable. But yeah, you definitely need to do the doors and expect the car to initially feel a little heavy around corners with the added weight in the doors but you get used to it soon enough.