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Fig. 9: Front diffusor adjustment positions
NOTICE
The setting of the front diffusers must not be
changed on the 911 GT3 with Touring Package.
The right and left front diffusors can be adjusted to
4 positions to increase the front axle downforce.
Here, it is absolutely essential that you set the right
and left front diffusers to the same adjustment
position so that the balance is not shifted to one side
of the vehicle.
e Tighten the fastening screws of the front diffu-
sors to the prescribed tightening torque of
1.5 ftlb (2 Nm).
Fig. 10: Front diffusor adjustment
Should adjustment be required, Porsche
recommends adapting the rear wing and front
diffusors at the same time.
For an additional improvement in brake cooling,
Porsche recommends the high downforce setting for
race circuits where the brakes are subjected to
high loads.
It should be noted that any adaptation of the rear
wing and/or front diffusors leads to a shift in the
overall balance of the vehicle.
High downforce settings also result in greater
aerodynamic drag, which affects the maximum
speed and acceleration capability at high speeds.
Race Circuit Driving
As in the case of the chassis, factory basic settings
for the vehicle's overall aerodynamic stability on the
race circuit or elsewhere are a balanced compromise
between downforce on both axles and the resulting
drag.
Thus, a steeper rear wing setting angle, for example,
not only results in a higher air resistance, but also
displaces the aerodynamic balance in the direction of
the rear axle. This means less downforce on the front
axle – and the associated potential consequences
(a tendency to understeer, etc.).
Information
The rear wing and front diffusors must be in the
factory setting when driving on public roads.
After driving on the race circuit, always:
e Adjust the rear wing to the factory setting
(position 1; front fastening screws of rear wing at
lower end of slot).
e Adjust the right and left front diffusors to the
factory settings (position 1; fastening screws of
the front diffusors at the upper end of the slot).
7
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