Limited support
This feature is only present in Portal 2: Community Edition and Portal: Revolution.

sv_portal_turret_fire_cone_z_tolerance

🟩 Executable on Server

sv_portal_turret_fire_cone_z_tolerance <value>

The max height of the turrets firing view cone (in degrees)

Warning:

This is a cheat command and can only be used when sv_cheats is set to 1.