Masterpiece Theatre Reply #45 – February 13, 2008, 06:44:42 PM Here's a visual example of what's going on. Pardon the horrible drawings. Picture 1: This is how our cars are currently set up (minus the factory sound deadening material). Heat pours out from the exhaust pipe in the form of radiation and passes through the air gap between the pipe and the sheet metal at the speed of light. It then hits the sheet metal, which probably soaks up 80-95% of the radiant heat energy. Picture 2:You slap on some Fatmat/Dynamat/Damplifier on the outside of your mean machine. Heat pours out...blah, blah, blah - except when it hits the foil, 90%+ is reflected back. The increase in reflected energy is due to the higher reflectivity properties of the foil itself. Picture 3:You put the FM/DM/DF on the inside of your car, under some wicked brown shag carpet. The foil is now sandwiched between the butyl/sheet metal and the carpet. There is no air gap on either side of the foil, thus radiation cannot take place. The foil portion becomes ineffective in deflecting radiant heat. If you removed the carpeting, then the foil could act as a radiant barrier to keep heat in the car. Quote Selected
Factory sound deadener Reply #46 – February 13, 2008, 07:21:54 PM I guess what he's saying is reflect it before it hits the floor Quote Selected
Factory sound deadener Reply #47 – February 13, 2008, 07:45:47 PM here's somethinghttp://www.amazon.com/DEI-010412-Adhesive-Shields-Reflect/dp/B000SJVMAA/ref=sr_1_17?ie=UTF8&s=automotive&qid=1202949793&sr=1-17 Quote Selected
Factory sound deadener Reply #48 – February 13, 2008, 11:22:56 PM daminc, I'm in modeling and simulation - currently working on Project Constellation. Quote Selected
Factory sound deadener Reply #49 – February 13, 2008, 11:33:04 PM Now that is real cool. Quote Selected
Factory sound deadener Reply #50 – February 14, 2008, 11:28:30 AM Are you shiznitting me?!? That is so fricken cool!! Quote Selected
Topic: Factory sound deadener (Read 5110 times)
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