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SummerSledSix SummerSledSix is offline
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Join Date: Jan 2002
Location: Connecticut
Posts: 369
Sorry about the extra comma at the end of the link, guess the BBS s/w decided it was part of the link when I was typing.

Not sure what your question was, but the dynamat (and similar stuff) embodies the principles you mentioned. Depending on which product you use, The stuff is a sandwich of closed cell foam and some really gooey neoprene or PVC stuff (which is much more compliant than any undercoating I've encountered). You can get foamA/lead/foamB or black goo, or black goo with metal heat barrier. That goo is like bubble gum on a hot sidewalk. Anything that will dampen the oil can resonance of the sheet metal is a good thing, but I'd trust the geeks at dynamat to have tuned the "gooey-ness" for wide spectrum attenuation.

I don't think coating the underside of the engine lid with this stuff is a rust risk, neither the goo nor the metal absorb water and ya gotta not trap air when you install it if you expect it to stay put.
Yellow '76 914 3.2
Old 04-06-2002, 09:56 AM
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