[FC] Sound deadening material.

[George]

The real criteria on sound deadening material is Weight.  Mass. The heavier 
the better. Lead would be good, but impractical.  Heavy carpeting, Heavy 
rubber foam, The heavier the better.
Just remembered, I talked with another Corvair enthusiast a couple years ago 
at a convention, who owned a Decibel meter and had done a lot of in the 
vehicle sound measuring.  He told me the best thig he did to lower the 
inside the vehicle engine sound was the remove the rear engine motor mount.

He supported the rear of the engine with a floor jack. and the sound dropped 
dramatically.  This tells me that the better (Softer?) mount you have the 
better sound deadening.

George Koenig