wallyedmonds

taken from the book.

Damper tubs: the effects of dampening are not always the same and will change with different levels of grip
in the track.On high bite carpet tracks,where traction rolling is sometimes an issue,using a thicker damper tube fluid will slow the side weight transfer and prevent traction rolling,giving a smoother,more consistent steering feel.On low bite carpet(or asphalt)too thick of a damper fluid will actually cause the car to be loose.or over steer,because the weight can not transfer quickly enough.Going to a thinner fluid here will tighten the car up by allowing more weight transfer.
hint-
a quick way to determine which way to adjust the dampening is to go out and run a few laps (preferably on the clock) bring the car in and pull 1 of the tubs off and go back out and run again.you can then make a decision (based on lap times and feel)on which way to go with your dampening,saving you a couple of re-lubes.
hope this helps you out.