The basic information for Tuning Center settings is here: http://www.xsimulator.net/tuning-centre/

Keep in mind that the Tuning Center is working with whatever % you set in the SimTools Game Engine.

Increasing the Min/Max numbers will slow how fast the rig reacts for that force and decreasing them in value makes the rig respond quicker. By unchecking the tick you can set the Min/Max at different values, which is useful for simulating things like gear shift

There are default values that plugins supply for the Tuning Center, but they are not always correct.

The first thing to do before fine tuning motion settings in the Tuning Center is to get you simulator to establish some base settings. The proper sequence to do so is click capture max/min, reset all, drive/fly for a while without hitting anything, back in Tuning Center save then finally stop capture, as explained by @noorbeast here: http://www.xsimulator.net/community/threads/pitch-problem-with-fsx.6482/#post-71837

See here for the official Tuning Center documentation: http://www.xsimulator.net/tuning-centre/