Stiffness and Sound Deadening - Saab General Bulletin Board - Saabnet.com
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Stiffness and Sound Deadening
Posted by Tim (more from Tim) on Thu, 3 Feb 2011 16:29:30
In Reply to: weight distribution?, James, Thu, 3 Feb 2011 07:49:39
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Besides the growing size, structural stiffness probably takes up a lot of weight: anything from beams in doors that are mandated since about a decade and half ago to almost an order of magnitude of higher bending coefficient for today's common sedan platforms compared to a decade ago. Sound deadening material is notoriously heavy. The bigger brakes and bigger wheels/tires are solid weights.
I don't quite understand the obsession with higher mpg. In the grand scheme of things, fuel cost difference between cars of comparable utility is usually miniscule compared to the overall ownership cost for anyone who is not in the delivery or livery business. For people driving more than 12-15k miles a year, a move to a place closer to job (or better yet telecommute) would save far more gas than tinkering with unsafe light-weight cars.
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