2008 Dodge Viper Owner Manual Supplement - Page 20

5.6 Track Set up Ride Height Adjustment The factory ride height of your ACR is approximately: Front: 5 ¼ in. (132 mm) Rear: 6 in. (153 mm) measured from the bottom of frame rail to ground at the axle centerline with no passengers, a full tank of fuel and tire pressures set to 29 psi. A low ride height setting may not be optimal at all tracks. It will generally be more acceptable to run a lower ride height at a track with smoother surfaces, fewer abrupt elevation changes and fewer bumps. The optimum set up for your vehicle also varies with track, driver and ambient conditions. Below is a recommended starting point for two typical track configurations. Smooth track set up: Front: 4 in. (102 mm) Rear: 5 3/8 in. (136 mm) Adjusting lower than then smooth track set up is not recommended. Rough track set up: Front: 4.375 in. (111 mm) Rear: 5 1/2 in. (140 mm) The rake of the car (or front to rear ride height difference) may also be changed with your ACR suspension. Changing the rake may be beneficial at some tracks. Use caution when changing the rake angle. CAUTION: Depending on your set up, driving style, and track condition, some tire to wheel liner contact may occur. To avoid excessive wheel liner wear, adjust your ride height accordingly.