Is there a way to enable the CharacterController collider to tilt?

I'm working on a script for a character that can run up curves onto walls, and go through loops Sonic-the-Hedgehog style, but I'm finding that the CharacterController has its collider locked into the upright position... I don't want to use a rigidbody because I don't want to depend on the built-in physics, and the move function does just what I need... but the CharacterController seems unable to tilt. What's up with that? O_O

The character controller cannot be rotated. It's basically optimized for Quake/Unreal/etc. type games.