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PORSCHE 911 GT3 R | USER MANUAL
CAMBER
As at the front of the car it is desirable to run significant amounts of negative camber in order to increase the lateral grip
capability; however, it is typical to run slightly reduced rear camber relative to the front. This is primarily for two reasons, firstly, the
rear tires are 25 mm (~1”) wider compared to the fronts and secondly the rear tires must also perform the duty of driving the
car forwards where benefits of camber to lateral grip become a tradeoff against reduced longitudinal (traction) performance.
TOE-IN
At the rear of the car it is typical to run toe-in. Increases in toe-in will result in improved straight line stability and a reduction
in response during direction changes. Large values of toe-in should be avoided if possible as this will increase rolling drag and
reduce straight line speeds. When making rear toe changes remember that the values are for each individual wheel as opposed
to paired as at the front. This means that individual values on the rear wheels are twice as powerful as the combined adjustment
at the front of the car when the rear toes are summed together. Generally, it is advised to keep the left and right toe values equal
to prevent crabbing or asymmetric handling behaviour; however, heavily asymmetric tracks such as Lime Rock Park may see a
benefit in performance from running asymmetric configurations of rear toe and other setup parameters.
REAR
ARB BL ADES
The configuration of the Anti-Roll Bar arms, or “blades”, can be changed to alter the overall stiffness of the ARB assembly. Higher
values transfer more force through the arms to the ARB itself, increasing roll stiffness in the rear suspension and producing
the same effects, albeit on a smaller scale, as increasing the diameter of the sway bar. Conversely, lower values reduce the
roll stiffness of the rear suspension and produce the same effects as decreasing the diameter of the sway bar. These blade
adjustments can be thought of as fine-tuning adjustments between sway bar diameter settings. 3 ARB blade options are available
ranging from soft to hard.
PORSCHE 911 GT3 R | ADVANCED SETUP OPTIONS | CHASSIS