Quote:
Originally Posted by repo
Are you talking about XREAS? I thought KDSS is basically a fancy end link disconnector. Which is as soft as it gets because its disconnected.
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KDSS has a few functions. One of which is the use significantly bigger sway bars because they can be softened on demand. The KDSS bars are 40% larger in diameter than the non KDSS version. Sway bar spring rate is proportional to diameter to the 4th power. Assuming that they have similar dimension otherwise : wall thickness, width, and lever arm effective length (not necessarily true, but I'm just giving a rough example), KDSS sway bars are 2.8 times as firm on the highway as the std bars. I think that's probably pretty close to reality. They are a lot stiffer.
The issue with being too firm is off-road between about 12mph and maybe 40-50. The valves close off the accumulator chambers at 12mph and that's when they get very firm. Sometimes too firm for smooth ride at medium speeds. A softer bar could be better for some people and still have pretty good highway ride too. The 4runner KDSS is also sort of KDSS lite compared to the Land cruiser. So it does limit travel once you start using longer travel shocks. Softer sway bars could help there too.