Originally Posted by yyhayyim
From the Master, Todd Hodge:
"...Less caster will give the car a more responsive feel and less steering into the turn, however, it will yield more corner exit steering. More caster will give the car more steering into the turn and make the car easier to drive..."
Todd is incorrect with regards to 4wd touring cars. Under certain conditions he would be correct for 2wd off road cars. The dynamics of 2wd cars vs. 4wd sedans are different.
On a 4wd sedan less caster gives more corner entry steering and less corner exit steering.
More caster gives less corner entry steering and more corner exit steering.
With the Mi Series sedans 4* works best 99% of the time for rubber tire racing on asphalt and carpet.
With foam tires on carpet 6* is the norm. The sedans have so much turn in on foams that the increase in caster has no negative effect on corner entry but certainly increases mid corner and exit steering and corner speed.