Sound deadening

[Billy Hunt]

I have just bought the MGB pictured below which has had a full body restoration (including mint resprayed underside).
At the moment it is a rolling shell with a bare interior.

Before I put anything into the interior carpet or panel wise I want to put sound proofing / deadening on every panel (Floor, firewall, roof lining, door skins, transmission tunnel inner wings etc etc).

What is the best product to use for this? I use my current B everyday and this one will be used the same so would be nice to reduce cabin noise for the longer motorway runs etc.

[Dave Hedgehog]

gorgeous colour

[Riley Blue]

Have a look at this (link below), the Corotherm Butyl Flashing Tape seems to be highly rated. I've bought a roll to try in the doors of my Riley to turn the 'clang' into a 'clunk'.
http://www.ttforum.co.uk/forum/viewtopic.php?f=2&a...

[na]

cabin noise ??

seals reduce cabin noise too unfortunately some rubber seals you get now are wrong profile and/or poor quality rubber

personally I wouldn't put the matting soundproofing in (or carpets) until I knew for certain the car was pretty much water tight as the matting type of sound proofing can hold a lot of water for a very long time

I've never worried about having sound proofing in the Midget but it's a different car to a B and anyway the quieter you get the car the more you heard the road and tyre noise

[Billy Hunt]

Cheers for the link, he certainly seems quite obsessive about his noise

Don't worry na, the list of things to do starts with getting it water tight!

[na]

as you're a everyday B user BH you'll know much more about the car than the vast majority of B owners

as to how near you'll get it to modern standards of quiet is another matter, as long as the tyre/road noise doesn't drown out the engine, induction, g/box, r/axle and exhaust noises then that's about right to me

[droopsnoot]

I've been trying to quieten down the Firenza this year. I got some closed-cell foam to use as carpet underlay precisely because it doesn't hold water if it does get damp, and some types of it are heat-resistant. I got mine from a local guy that does shows around here (in the North West) but it's on ebay as well.

I second the seals - I had terrible wind noise from mine at motorway speeds, so loud you couldn't hear the engine over it, turned out that there was a ~4mm gap between the top door seal and the body. I got some self-adhesive foam strip (draught excluder, basically) and stuck it to the bodywork to close the gap (new door seals are a figment of the imagination for the Firenza, sadly) and it's much better now. You can hear the whining ZF box at speed now.

[SWH]

Owning one, and having commuted on the motorway in it, I found the MGOC sound deadening kit was reasonable, well, everything was cut the right shape and it came with a funky smelling adhesive anyway. Value for money, well I was happy enough, not great results but certainly quieter.

Cutting out the wind noise was key... a length of gaffa tape up the drip/gutter down the A pillar looked horrific, but made a massive difference. Tightening up the doors so they shut properly helped loads too.

I found this again after a good googling, read it once before, and it stuck in my mind as being full of good ideas. Looks like you maybe at a reasonable stage to implement at least some of it: http://www.vord.net/cars/mgb_mods/noise/sound-proo...

Good luck, and keep us posted on what you do, and more importantly, whether it works!

[Billy Hunt]

I'm certainly well aware that I wont get the interior as quiet as a modern car which in some ways is good! I find many new cars very isolated from the outside world which makes it very easy to go over the speed limit completely unaware.

Borrowing an image from the link shows basically what I'm planning on doing. I never would thought of 'body sealing' so thats something else I can incorporate.
I also wouldn't of thought of the rubber strip running up the roof gutters which may also be worth a try.



I found this whilst ebaying last night: http://www.ebay.co.uk/itm/280960553266?ssPageName=...

This looks ideal (if its effective!) as it has a bit of thickness to it and a nice rubber type coating facing up.
Any thoughts on this product?

[na]

Billy Hunt said:

I find many new cars very isolated from the outside world which makes it very easy to go over the speed limit completely unaware.

I agree, been saying it for years, also helps to make even fast modern cars seem boring

Billy Hunt said:

I also wouldn't of thought of the rubber strip running up the roof gutters which may also be worth a try.

I've not looked this up but remember to allow water to get away also rememer it's a balance the more you isolate the noises from the cabin the more you'll notice things like wind/tyre/road noise, sotheb less you do of one then the less you may need to do of the other, you could end up chasing your tail a bit like trying to get the perfect hi-fi sound when using electronics

personally I like the sound of tappets, induction and a raspy exhaust

Billy Hunt said:

I found this whilst ebaying last night: http://www.ebay.co.uk/itm/280960553266?ssPageName=...

This looks ideal (if its effective!) as it has a bit of thickness to it and a nice rubber type coating facing up.
Any thoughts on this product?

don't know that particular stuff but its type is very good for stopping panel drumming and the like, I'd sonner have a lot of that and very little soundproof matting to keep the balance and hear the components as I put above

I'm not a big fan of soundproofing the bonnet or using the ally rocker covers, the noises help with the impression of speed and being in a mechanical vehicle

I had a short passenger ride in a Teslar the other night now you can feel the speed in that and have very little noise, I've seen an electric driven Midget how about you doing a BGT

[Riley Blue]

Billy Hunt said:

I found this whilst ebaying last night: http://www.ebay.co.uk/itm/280960553266?ssPageName=...

This looks ideal (if its effective!) as it has a bit of thickness to it and a nice rubber type coating facing up.
Any thoughts on this product?

It doesn't actually say what it is and looks like sticky backed foam rubber to me (see the negative feedback which says that too). If that's what it is, you'll be wasting your money.

[Billy Hunt]

This is very true from looking further into that product. I have managed to find some 'closed cell foam' soundproofing that looks a lot more promising.
I reckon I should get away with 10mm thick under the carpets + on the door skins etc then maybe the 3mm thick for behind the footwell panels and under the sill carpets.

[Richie Howard]

check the fit of the seat runners - you may need to leave a space

[na]

haven't you gone from sound deadening on to soundproofing now?