Door sound

Removing the door cards have no problem with. It's putting them back together 100% perfect fit that I worry about :headbang:


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What thickness sound absorber did you guys use? Dynamat (which I read everywhere as being the best) is $140 for a 32"x 54" (813mm x 1372mm) in half inch thickness. Would thinner than that still be suitable? I'm assuming that that size sheet would do both doors comfortably - each door is around 1100mm long and 500mm tall.
 
I bought a third generation Mazda RX-7 R-1 right after they came out. Mazda put this car on crash weight loss program with some predictable results. The car was scary fast but the lack of sound deadening gave rise to a lot of road noise and when closing the doors it made a sound that reminded me of slamming the lid onto a rubbish bin. My 2003 Z4 sounds pretty good to me.
 
Mangozac said:
What thickness sound absorber did you guys use? Dynamat (which I read everywhere as being the best) is $140 for a 32"x 54" (813mm x 1372mm) in half inch thickness. Would thinner than that still be suitable? I'm assuming that that size sheet would do both doors comfortably - each door is around 1100mm long and 500mm tall.
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$140.... sheeze, don't even think of paying that. I attended the Grovsner open day in Reading UK & they had an independent auto guy there. After a bit of chat I got 4 sheets sent by post for about £25... as it happened, I only had US$ in my pocket & he was off to the US on hols so struck a deal for 40 US.

Suggest you go to some event, get pally with the audio guy & ask for his advice over te tinny doors... & wait for him to suggest what to do & how hard door cards are to get off... then see what he'll let the deadening material go for cash in hand...

For those in UK that know ''johnnyfive', he has this auto electricians details'(sorrz m8, lost te guys info)
 
Don't think I used dynamat. Looked on line at some kind of audio insulating supplies company, kind that supply sound proofing wholesale for any application not just cars. IIRC their where two different basic types of foam. One would deaden sound,one would prevent it passing through (or something like that). Then within each of these categories there where many products.

I went for a cheaper option within this, think it was the "deadening kind" and i think foam that I bought was either 0.5 or 1 inch thick. Cut it into strips and used a spray adhesive to stick into door. In easy to reach places through the metal frame of the door I doubled it up. The result was a lovely weighty feel to the door and on closing a really deep, but quiet thud. A bit like a combination of a great big oak door that had been fitted with those "soft close" mechanisms they put on kitchen cupboards these days.

Sounded much better than the doors of my current M, which came with sound proofing from factory.

Don't be worried about taking the trim off. Search for some how to guides on here (some really knowledegble people with well written guides on here!), and just go really slowly,methodically, and carefully.
 
ranski said:
I'm going to do the door soundproofing the weekend
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Is it safe to assume you will photographically document the entire process? :D

I hope you didn't buy a whole 36 foot roll of that fat mat! How thick is it?

Oh and that vid of removing the door panel is priceless!
 
There's plenty of options for sound deadening material on the web , i went for a foil backed bitchman type that is self adhesive , easy to cut and use and does the trick just fine, dont be fooled by the hype or branded names. A sheet 500 x 1000 mm will be plenty to do both doors.

I bought mine of ebay from ghost-audio-accessories for about £20

'Sound Barrier' by Ghost Audio Accessories is a fantastic Sound Deadening made from a black bitumen type material. This fantastic 'Sound Barrier' Sound Deadening can be used for many things such as In Car Audio Systems, Road Noise and Vibrations, Heat lose and much more. With a trading history of over 25 years we can assure you that this 'Sound Barrier' will not only give you good value for money but will also give you good Sound Deadening for your In Car Audio System and reduce Road Noise and Vibration.

2M X 1M sheet of good quality 'Sound Barrier' car sound deadening
Easily applied to flat surfaces such as car doors, roof and boot
'Sound Barrier' Sound deadening is ideal for killing annoying rattles or vibrations caused by in car audio systems (ICE)
One of the easiest and most effective ways to improve sound quality
Excellent for reducing general road noise
Adhesive backing for easy application - simply clean surface and stick on! Applied easier if the 'Sound Barrier' Sound Deadening is slightly heated
Easily cut to shape
Black bitumen type material
Reflective surface on 1 side increases heat resistance
'Sound Barrier' Sound Deadening comes in 10 different lengths; 1m, 2m, 3m, 4m, 5m, 6m, 7m, 8m, 9m and 10m.

The last bit was taken from there site hope this helps
 
I used some bitumen and silver roofing material from screwfix or toolstation.

Cost lots less and has been doing a good job for over a year now.

Just make sure that you fully degrease the door inner.
Its also better to do this on a warmer day as the stuff is more sticky and flexible.
 
Don't think there is a wax coating inside the doors. Its more of a rust prevention layer of undercoat paint. Its unlikely that you'll damage this with simple cleaning.
 
I didn't touch the panel with any kind if cleaner. Best left well alone.
Mine has remained perfectly stuck on after a couple of years of temp. extremes.
 
Cant find the sound barrier stuff anywhere, anyone got a link?

do you think this would work?

http://www.ebay.com.au/itm/Bull-Dog-Barrier-Sound-Deadener-Deadening-Mat-12-x19-/110564417023?pt=LH_DefaultDomain_0&hash=item19be271dff#ht_1046wt_907

Seems to thin... but the price looks good
 
Hotride said:
http://www.ebay.com.au/itm/Bull-Dog-Barrier-Sound-Deadener-Deadening-Mat-12-x19-/110564417023?pt=LH_DefaultDomain_0&hash=item19be271dff#ht_1046wt_907
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Yeah surely that's too thin? I'm thinking probably 1/4" thickness is probably the way to go: http://www.ryda.com.au/Dynamat-11102-Dynaliner-p/11102.htm

cj10jeeper said:
I didn't touch the panel with any kind if cleaner. Best left well alone.
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I agree that is safest. I realise the rust protection is not a wax coatingper se but whatever it is you don't want to mess with it...
 
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