View single post by Jensen Healey
 Posted: 08-30-2013 04:17 pm
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Jensen Healey

Joined: 03-11-2005
Location: San Anselmo, California USA
Posts: 983
We've all seen DynaMat installed over the entire interior of a car with foil facing. We are led to believe that this is the ultimate in sound deadening. Here's a website that disputes that notion:

Heat control is another real issue in the JH. Foil facing on synthetic jute mats is a popular product, but the foil is a conductor unless there is an airspace adjacent to it. This would work great under the car to reflect the heat from the exhaust pipe. 
I think following the lead of luxury car makers would be the prudent path to follow. Heat reflectors between the headers and floor boards, judicious use of DynaMat or similar products, thick carpet padding, and tightening any rattling screws and bolts will go a long way towards keeping the JH quiet and cool.