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Old 09-11-2008, 07:34 AM   #4
insite
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Join Date: Sep 2004
Location: Atlanta
Posts: 1,820
so let's talk about the velocity plot above. there are a few things to look at. first, there are two phases to most automotive dampers: low and high speed. low speed generally is for handling while high speed generally is for bumps. low speed is usually a damper shaft velocity of about 0 - 4 inches / sec and high speed is over 4 or 5 inches / second.

the 'knee' in the plots above shows that the ksport's damping curves change from low to high speed slopes at 2 inches / sec. this is a little early.

without getting into discussions on transmissibility, etc, let's just look at the slopes. generally, the compression slope should be about 2/3 (.67) of total damping and the rebound slope should be about 3/2 (1.5).

the min plot has no knee in rebound. the slope multiplier is only 1.08; this means that the 'min' setting is overdamped in compression compared with rebound. the damping ratio is a comfy 0.5.

mid has an obvious knee at about 2 inches / sec. the multiplier is 1.41 and the damping ratio is 0.78. this is a pretty good curve. the only thing i'd change would be to move the knee to 4 inches / sec.

max has the same knee at 2 inches / sec. the multiplier is 1.73 and the damping ratio is 0.96. this is overdamped all around, leaning heavily toward rebound.

the middle setting looks like a good choice here.
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'99 Boxster
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