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Old 07-05-2010, 07:31 AM
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Rule of thumb the smoother the track the stiffer the spring..If the car is too stiff then it will "pogo" and get loose in the chatter boards or rough portions of the track. main thing to understand is that the spring rates and shock valving is a variable component in setting up the car..Of course we now have cars with computer contolled active suspensions that adjust on the fly to road conditions going from soft ride to stiff when excessive body lean or roll is detected. Back in the day we carried several sets of springs and used the rebuildable/revalvable shocks to try and find the happy spot for the particular car and driver on a particular track.

Sam
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