Porsche 996 TT, Repair Manual

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46 Technical data/Brake wear limit − GT2
Technical Data − GT2
Wear limit technical Data − GT2
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Technical Data − GT2
The first GT2 vehicles will start without PCCB. Instead of this a conventional braking system will be installed
with the following deviating specification:
6−piston front fixed caliper, 4−piston rear fixed caliper •
Front and rear fixed caliper painted yellow / front fixed caliper, identical part to PCCB •
Other front and rear brake pads (brake pad version) as for PCCB
•
350 mm cast iron front brake discs •
330 mm cast iron rear brake discs •
Designation Notes, dimensions Wear limit
Operating brake (foot brake)
with ceramic brake discs
(production launch with cast iron brake discs) Hydraulic dual−circuit brake system with
front−axle / rear−axle brake−circuit distribution.
Vacuum brake booster, internally ventilated and
perforated brake discs with six−piston monobloc
fixed caliper on the front axle and four−piston
monobloc fixed caliper on the rear axle.
The brake calipers are painted yellow for visual
differentiation.
ABS 5.3 with CAN−Bus (3−channel ABS
without PSM and without TC (Traction
Control).
Brake booster
(vacuum) 10 inch
Boost ratio 3.15
Brake master cylinder front 25.4 mm
rear 25.4 mm
Stroke 18/18 mm
Brake proportioning control excluding
Brake discs front PCCB = 350 mm
steel = 350 mm
rear PCCB = 350 mm
steel = 330 mm
Effective brake discs front PCCB and steel
284 mm
rear PCCB 291 mm
steel 271.2 mm
46 Technical data/Brake wear limit − GT2 1835