Lancia Motor Club

Model Technical and Interest => Fulvia => Topic started by: DELTONA on 29 October, 2019, 05:13:38 PM



Title: Sound proofing / deadening recommendations?
Post by: DELTONA on 29 October, 2019, 05:13:38 PM
Hi, with all the various types of sound proofing/deadening material out there its a mine field. Mine has pretty much dissolved and needs replacing therefore I would prefer to go on a recommendation that somebody on here has used on their Fulvia and found it to be good. Any advice much appreciated.


Title: Re: Sound proofing / deadening recommendations?
Post by: lancialulu on 29 October, 2019, 05:35:58 PM
What!!! Cut out that beautiful sound a Fulvia makes?????


Title: Re: Sound proofing / deadening recommendations?
Post by: fay66 on 29 October, 2019, 07:38:41 PM
What!!! Cut out that beautiful sound a Fulvia makes?????

+1
Brian


Title: Re: Sound proofing / deadening recommendations?
Post by: Caracad on 06 November, 2019, 08:49:46 PM
Well you can have too much of a good thing.
I like to soundproof my old cars, often because the old stuff is rotten.

It is very difficult to find proper stuff that works. However it can be done.  noise reduction has to be tackled  in three ways.

1. Damping. Material applied directly to metal panels. Floor, bulkhead etc, to damp out the steel itself.
                   For this I use a proprietary self adhesive material like Dynamat. No need to cover the whole       surface, just a piece in the middle of the panel should do.
2. Sound absorption. This reduces airborne noise and is normally felt or foam. OEMs now use very lightweight fleece-like material. Hard to get hold of but good. Failing that closed cell soft foam works.
3. Finally a barrier. This is a heavy layer that blocks noise. Bitumen type material used to be common, but OEMs now use more of a rubber or EPDM Sheet.

All this stuff is available through eBay and should be applied in the order listed. Before you do any of this first check that you bulkhead is sealed. Most old cars have loose or missing grommets. These can be replaced or packed with some sort of sealant, or even Bluetac.


Title: Re: Sound proofing / deadening recommendations?
Post by: frankxhv773t on 07 November, 2019, 04:35:02 PM
Dynamat seems to be much used by professional restorers from what I can see.


Title: Re: Sound proofing / deadening recommendations?
Post by: nthomas1 on 07 November, 2019, 05:06:52 PM
I've been using Noico Black 80mil (2mm) Butyl Mat from Amazon.  Quite a bit less expensive than Dynamat but seems very similar and doesn't have the bold lettering which I (probably irrationally) don't like.  I've applied it to the roof of my car, and plan on using it on the floor and bulkheads.  It will be some time before I can comment on its effectiveness.


Title: Re: Sound proofing / deadening recommendations?
Post by: Caracad on 08 November, 2019, 08:42:21 AM
Dynamat is expensive. I think I found an alternative, but canít remember what it is.
Some stuff is just cheap bitumen like stuff that melts when it gets hot.
Proper stuff if more elastic. Hereís mine. Note I didnít use much as it was only to dampen the panels.



Title: Re: Sound proofing / deadening recommendations?
Post by: Caracad on 08 November, 2019, 08:45:03 AM
Another pic.


Title: Re: Sound proofing / deadening recommendations?
Post by: frankxhv773t on 09 November, 2019, 10:28:27 AM
That Amazon stuff looks very much like the original sound deadening on more modern Lancias.


Title: Re: Sound proofing / deadening recommendations?
Post by: BlueKSO on 09 November, 2019, 04:36:26 PM
Whatever adhesive is used for fixing the sound proofing/deadening to the roof or boot panels, make sure it is heat resistant.  Otherwise, in respect of the roof lining, youíll be wearing it.  Both roof and boot lid get extremely hot in the summer when the car is parked up.

Cheers,  Peter