This is a very important adjustment on your Porsche. It affects how well the car drives in a straight line, in corners and how your tires wear. There are three types of alignment factors to consider:
Camber & Toe
The two measurements that need the most attention are camber and toe. Camber is the difference between the top of the wheel and the bottom of the wheel in relation to the road. If the top of the wheel is tipped “in” 1 degree compared to the bottom of the wheel, this is considered to be 1 degree of “negative” camber.
Toe is the measurement between the front of the tires and the rear of the tires. “Toe-in” refers to the measurement between the front of the wheels being “less” than the measurement between the back of the wheels. Generally, a slight amount of “toe-in” results in more stability under braking and acceleration.
Porsches have the ability to adjust corner balance weights and ride height. Ride height is measurement between the ground and the fender lip. This is important in the appearance of the car and tire clearance. Electronic scales show the overall weight of the car as well as the amount of force each wheel applies to the ground. A “cross weight” percentage for the car can be determined. This is an indicator of how equal or flat the car is sitting on the ground. If the “cross weight” is off, the car will handle differently in a right hand corner compared to a left hand corner. An unbalanced car also takes longer to take a set or balance during turn-in, so optimal corner balancing leads to a better driving Porsche.
Bump-steer happens when a wheel changes its toe or steering angle when the suspension is deflected, such as when a wheel hits a bump, is called “bump steer”. A Porsche with a lot of bump steer will be more difficult to drive, as every bump will make the wheel change steering angle and thus the car will want to change direction. A car setup to remove bump steer will take bumps while cornering without issues.