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Fig. 5: Example: Adjusting anti-roll bars at front axle
1
Hard
2
Medium - factory setting
3
Soft
The factory setting of the anti-roll bars provides the
best compromise between high agility and
controllability of the vehicle.
For driving on race circuits, the anti-roll bars at the
front and rear axles can be set to 3 positions.
Here, it is absolutely essential that you set the anti-
roll bars on the left and right of one axle to the same
position.
Surface protection is applied to the anti-roll bars.
Following initial tightening of the fastening nut when
setting the anti-roll bar to position 1 (hard) or
position 3 (soft), the nut must be loosened and
tightened again due to the settling behavior.
e Tighten the fastening nut to the prescribed tight-
ening torque of 29.5 ftlb (40 Nm) + 30°.
Information
The anti-roll bars on the front and rear axles must be
in the factory setting when driving on public roads.
After driving on the race circuit, always:
e Return the anti-roll bars on the front and rear axle
to the factory setting (position 2).
Suspension alignment/Wheel clearance
The 911 GT3, like pure race vehicles, is very sensitive
to small changes in the chassis setup.
For optimum handling, it is essential that suspension
alignment is properly performed, in exact compliance
with nominal values and tolerances.
Despite the height adjustability of the chassis, no
further lowering is permissible. The height
adjustment of the spring struts serves exclusively for
fine-adjustment of the wheel loads. Otherwise, there
is a risk of increased contact with the end stops.
You can obtain the relevant values from your author-
ized Porsche dealer if required.
Race Circuit Driving
Information
In the course of extreme race circuit driving with the
911 GT3, harmless score marks may appear in the
wheel housing liners on the front and rear axles.
Porsche recommends regular checks of the entire
chassis setup (suspension alignment) as it has such
a great influence on handling and on the wheel clear-
ance, which is subject to tight tolerances.
Information
The chassis must be in the factory setting when
driving on public roads.
For information on the factory setting:
f Please see chapter "Technical Data" in the
Owner's Manual.
5
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