A sway bar is only pre-loaded in one direction (one drop link longer than the other). Unless you are only turn in one direction (NASCAR) you don't want any preload. You cannot preload both ends of the rear bar to effect spring rate at the rear (together, the same, equally) as all you will have done is lower the two ends (assuming your bushings are actually working and letting the bar rotate).
The NASCAR guy in the pit is actually removing/adding wedge to the car by changing the suspension perch height on that corner (effectively re-corner balancing the car). It may effectively impact preloading of the rear bar but I'm not sure of the linkages/geometry of NASCAR cars.
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Martin
2011 Cayman S (Gone) - Hardtop Blechster
2006 Cayman S (DD)
2016 Mazda CX-5 (Her DD)
2002 Boxster S (Gone) - Ragtop Blechster - Pura Patina!
Dorkiphus: I buy it for the articles
Last edited by N0tt0N; 05-04-2014 at 09:15 PM.
Reason: clarification
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