Ackerman Principle

[jmking]

Ackerman is the relationship between the turning angle of front tires. Neutral Ackerman occurs when the pitman arm is directly in line with the ball joints on the steering arms. Both tires with turn at roughly the same angle. Negative Ackerman occurs when you place the pitman arm behind the imaginary line that connects both ball joints on the steering arms. Negative Ackerman causes the inside tire to turn more than the outside tire. Positive Ackerman occurs when pitman arm is located in front of that imaginary line.

You should be able to tell where the servo pitman arm is located in relationship to the steering arms. I would always run a negative Ackerman on our off road race cars.