Ackermann or the Ackermann effect is a property of a car's suspension that causes the car's toe angle to change as the wheels are turned to each side.
In most RC cars, the Ackermann angle is positive which means the inside wheel in the turn has less toe-in (or more toe out) than than the outer wheel when they are turned.
Your car's Ackermann can be adjusted by moving the inside or outside of the steering link either forward or back.
Depending on the car, you would do this by:
- Using a different hole for the ball stud either on the rack (inside end of the link) or the steering arm (outside end of the link)
- Changing the number of spacers at the rack (inside of the link). This only applies when the ball stud is aligned horizontally - if it is vertical, the spacers control bump steer.
Lower Ackermann angle (links straighter, more perpendicular to chassis)
- More on-power steering
- Decreases toe-out when wheels are turned
Higher Ackermann angle (links more angled)
- More off-power steering
- Increases toe-out when wheels are turned