first off read the instructions that came with your cam. it'll tell you the valve lash adjustment. but usually you set it to 0 lash ( with no slop between the rocker arm and lifter plunger in the push rod and not pushing the plunger in) then you set your lash at 1/2 a turn or 3/4 or even 1 turn down on the rocker nut after you had the valve lash set to 0. but it should tell you in the cam instructions to set it at 1/2 3/4 or 1 turn down. i set my valve lash before i put the intake on.