[Diy_efi] Off Topic: Car sound and heat insulation

[Aaron]

I have had good luck with the Dynamat products as used in motorhomes in the
interior drivers floor and fire wall area.

The under carpet see a lot of abuse only because in a motorhome you actual
walk on residential / home grade carpet. 

That abuse is typically only small punctures in the heat reflecting foil.

The Dynamat  looks similar to what you were researching, but with added
thermal protection.

 

http://www.dynamat.com/products_automotive_introduction.html

 

I could see a spray on bed liner be easy to install and great for noise. 

But I'm not sure about much of a thermal insulation benefit. 

 

From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org] On
Behalf Of Ben P
Sent: Friday, October 26, 2012 8:26 AM
To: diy_efi at diy-efi.org
Subject: [Diy_efi] Off Topic: Car sound and heat insulation

 

So back in NZ I had a car that was a dream to be in. It stayed relatively
cool in the sun, was quiet, everything shut with a thud, it had hardly any
creaks and the ride quality was superb. The car was a 1989 Mercedes Benz
300SE. And it handled a corner like a pregnant cow going full gallop through
a hedge maze. But back to the point... I'm now about to have an 87 Suzuki
Mighty Boy (you won't find many stateside, so the description is 80's budget
Kei Class coupe utility) and it does NONE of those. I'm not going to get it
to the standards of the Mercedes but I should at least be able to get
everything but the aero noise down to current budget car levels

Given that I'm going to pull it down for a rebuild and re-power anyway it is
going to take little extra effort to address most of these concerns.

Specific things I've noticed:

There is a lot of exposed metal in the cab
Very little insulation of any kind is used
The temperature of the inside of the roof (very thin lining) changes rapidly
and often
I can hear everything mechanical in the car even when it's in perfect
condition/adjusted correctly
The carpet isn't tight and doesn't have much underneath it
The doors sound like they have the structural integrity of a dented coke can
Audio systems in similar cars (none currently in the mighty boy, but I have
a 91 charade that sounds acceptable, at rest...) need constant volume
adjustment depending on road speed
No tinting in the tropics is madness
Cheap cars from the 80's have no air-con
Having a passenger or load in the vehicle increases ride comfort
dramatically (to the point that it goes from below average to slightly
above) in terms of small bumps.

I was thinking of lining the outer door skins with this:
http://www.jaycar.com.au/productView.asp?ID=AX3680
The roof in a single layer of this (headroom is at a premium, I can only
afford one extra layer here):
http://www.jaycar.com.au/productView.asp?ID=AX3662
I'm stuck as to what to do for the floor (and rest of the exposed cabin,
actually). There is this stuff
http://www.jaycar.com.au/productView.asp?ID=AX3689 but it's expensive and
I'm not certain how durable it is when used under a carpet.

Word on the street is that lining the inside door panel is worthwhile too,
blanking off any unnecessary access holes. I may do that while I'm at it

So what products have you guys used in regards to sound and heat insulation?
And what tips have you got for me?

Also note that the car will be re-powered with an 800cc motor at least (with
50% more power than stock) an extra 30kg won't be noticed much in
acceleration.

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