Suspension Alignment; Miscellaneous - Porsche 911 GT3 Cup 2008 Technical Handbook

Suspension alignment

Miscellaneous:

Front axle:
Rear axle:
Measuring and aligning the front and rear 911 GT3 Cup suspension is
similar to the alignment procedure for a standard road-going Porsche.
The suspension alignment can be made with any suitable optical or
electronic system or the optional Porsche Motorsport alignment system
(part nr. 997.450.351.90 / 997.450.561/562.90).
The following steps must be carried out to achieve the suspension
alignment values given by Porsche:
All suspension arms and bearings must without play.
•
• Fuel tank half-full (40 litres)
• 75 kg ballast placed on driver seat.
• Inflate all four tyres to a pressure of 2 bars.
The following procedure is recommended when checking the complete
wheel alignment:
• Disconnect the anti-roll bars
• Adjust the ride height
Adjust the rear axle camber first and then the toe.
•
Adjust the front axle camber first and then the toe.
•
• Re-adjust ride height and set corner weights
• It is not possible to adjust the castor
• The corner weights are adjusted by changing the ride height, the
smallest possible corner weight difference between the left and
right hand side of each axle is recommended.
All the front suspension alignment values should be adjusted with the
steering wheel locked in the straight ahead position.
The basic camber adjustment is made by the addition or removal of the
adjustment shims between the lower wishbone and the wishbone
bearing.
The fine adjustment is made on the McPherson strut thrust bearing.
The McPherson strut thrust bearing must be centred before setting the
basic camber value.
The camber is adjusted by the addition or removal of the adjustment
shims between the lower wishbone and the wishbone bearing.
The fine adjustment is made by adjusting the eccentric camber bolt in
the lower wishbone.
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