Dodge 2008 Viper Supplement - Manual (Page 18)

The compression adjustment (also called bump) varies the damping of the
upward travel of the wheel relative to the vehicle.
The compression adjuster is located on the remote canister fixed to the
damper body and has 14 damping positions. Depending on vehicle ride
height, the car may need to be raised to gain access to the compression
adjuster. To adjust the compression damping, turn the finger knob:
clockwise stiffens; counterclockwise softens when viewed from the top
surface of the finger knob.
All settings are referenced from the full stiff (position “0”). The “0”
position on compression is achieved by turning the finger knob clockwise
until you cannot turn it any further.
CAUTION: To avoid damage to your dampers DO NOT force the finger knob
when it stops turning. Also, NEVER use any tools to adjust the finger knob.
From the “0” position, turning the adjuster counterclockwise will soften
the damping. Count off the clicks and record your setting. Every “click” is
a new damping position (i.e. two clicks softer from the full stiff position is
position “2”).
5.3 Compression Adjustment
Soft Hard
Front
Rear
Hard Soft