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Author Topic: Sound proofing the interior  (Read 559 times)
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JohnFol
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« on: April 19, 2021, 09:33:05 AM »

Morning all, one job I am lining up for later in the year is sound deadening the cabin. Carpets are all in good condition and removal / refitting is within my ability but how to sound proof would be new to me. I've used stuff like Dynamat in the past for fitting speakers but not sure that's the right approach for the entire car.

So, any advice on what materials I should be looking at?
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peteracs
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Peter Stokes


« Reply #1 on: April 19, 2021, 09:45:34 AM »

Hi John

I am sure Eric will be along to answer, but checkout his VX Spider build as he has photos and comments re soundproofing.


Peter
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Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
JohnFol
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« Reply #2 on: April 19, 2021, 10:32:07 AM »

I knew I had seen a picture somewhere.
http://www.betaboyz.myzen.co.uk/forum/index.php?topic=4118.40
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Orbital
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« Reply #3 on: April 19, 2021, 10:33:00 AM »

Hi,

I have just done this myself.
I cleared off all the original soundproofing as it was crumbling.
Then used a combination of Dodo mat sound deadening https://www.dodomat.com/products/dodo-dead-mat-hex-50-sheets
And Dodo Foam Super liner. https://www.dodomat.com/products/dodo-super-liner-12mm-sheets

Really easy to apply and mold around difficult shapes all self adhesive which is nice.

I cant say how much difference its made as the car isn't complete!




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peteracs
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Peter Stokes


« Reply #4 on: April 19, 2021, 10:48:50 AM »

Nice job

Peter
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Beta Spyder S2 pre F/L 1600
Beta HPE S2 pre F/L 1600
WestonE
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« Reply #5 on: April 19, 2021, 12:25:55 PM »

This is a job I hate as it is like an endless 5 year old's craft class. I used some Dodo mat on the Monte over the exhaust box, but did find it surprisingly heavy compared to dynamat. I found Fat Mat hard work to fit as it is thick and stiff a heat gun is needed really.

The OE bitumen and water holding felt is a disaster but keep the soggy rotting mess as patterns for the closed cell foam replacements. If you can copy the original felt it will be far quicker to do.

Lancia went for a minimal approach with the bitumen and I have gone over the top. But focus on floors wheel arches engine bulkhead. If metal rings or rattles to a light tap it will transmit and in some cases amplify noise.

Eric 
PS gloves to prevent your hands going black or blue and picking up cuts from the foil.   
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