Attribute Name: Designed as a bolt in, high torque cam models.. 180 psi cranking compression, no need for compression releases.. For 22 CID engines with stock compression ratio Idle-4500 rpm. Intake Opening (degrees): 18. Intake Closing (degrees): 18. Exhaust Opening (degrees): 46. Exhaust Closing (degrees): 11. Intake Duration (degrees): 216. Exhaust Duration (degrees): 237. Valve Lift (in): .509. Intake Lift at TDC (in): .174. Exhaust Lift at TDC (in) . Values (Page 1)