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  #41 (permalink)  
Old 11-21-2002, 03:41 AM
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Joe,

Unsprung weight is the stuf that must move when a wheel hits a bump. The wheel, tire, upright, suspension arms, and maybe the brakes all contribute. The rest of the car - body, chassis, engine and payload are insulated from the road by the springs. A good thing.

One of the prime functions of the shock absorber (a terrible misnomer...) is to damp the motions of the unsprung weight. (Ever see a car with "bad shocks" going down the road with a wheel literally bouncing on the pavement?)

The more unsprung weight, the stiffer the required damper. The downside of a stiff damper is a poor ride, and possible loss of traction under bumpy conditions, plus there are transition issues - when the car turns into or out of a curve.

Sooo - the lower the unsprung weight, the better.
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-E.R.A.-

Please address parts inquiries to eraparts@sbcglobal.net
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