<VV> Sound Dampening for Roof

[Rick Loving]

It's that and that any chamber can focus and amplify sounds picked up
from around you.

Think of just how a hard rain would sound without a simple tar mat stuck
to the underside of the roof, let alone some loud muffler or a semi
engine braking next to you....sound can come from above.

Rick Loving



-----Original Message-----
From: virtualvairs-admin@corvair.org
[mailto:virtualvairs-admin@corvair.org] On Behalf Of Mike Kost
Sent: Thursday, December 09, 2004 9:13 AM
To: Virtualvairs
Subject: Re: <VV> Sound Dampening for Roof

It might be that GM engineers found, either during testing or by 
analysis, that at some wind speed the roof panel had a vibration which 
was damped by the material which you removed.

Mike Kost
Show-Me Corvair Club

Hank Kaczmarek wrote:

> Jim.
>
> Thanks for your ideas.  Only 2 questions, and I know you know the 
> answer to one of them.
>
> 1. What did you use for the "Full Treatment" on your car??
>
> 2. What was the purpose of the crap that took me two hours to scrape 
> off the roof??? even using a Shop vac to get most of it off the roof 
> (thought I'd need a heat gun as Smitty said, but I guess the San Diego

> heat negated the need for that), I ended up looking like I'd rolled 
> around in a coal bin!!
>
> Some kind of treated paper I guess. But if it wasn't for soundproofing

> (since you did a convert, not debating your premise),  Why did they 
> bother to put it in?? Some other purpose??  If they wanted to save 
> money ( and not using a Park Pin on a PG was an example) that stuff 
> wouldn't have been in there. Sure wasn't any in the door panels. and 
> suchlike. Of course the EUM arrived sans door panels.  But not in 
> other cars I stripped out either.
>
> Thanks
>
> HANK
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