Just a little side information, Ackermann steering refers to a specific type of car steering geometry. With Ackermann steering, the wheels will actually be at different angles during steering travel to more accurately approximate the path in which they are traveling. Cars have Ackermann steering for a variety of reasons: decreased scrub, better front end traction, etc.
Here's a picture to explain further:
Not all 'Car Style steering' in FRC is necessarily Ackermann Steering, some teams in 2008 used parallel steering to some success, among other methods.