[Diy_efi] Off Topic: Car sound and heat insulation

[Bill & Janet Washington]

Ben,
     to minimise solar heating and maintain 
headroom, here is a wild idea for you:
Do you remember the early Land Rovers? They had an 
extra skin mounted above the roof with an air gap 
between! It wouldn't do much for aerodynamics, but 
the Land Rovers had the aerodynamics of a well 
trimmed brick, so you wouldn't have noticed the 
difference.
Might something like that be an option for your 
Mighty Boy? It certainly wouldn't impact your 
headroom.....

Regards
Bill
On 26/10/2012 11:25 PM, Ben P wrote:
> 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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