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Technical data - 911 Carrera

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2005 Porsche 911, 2004 Porsche 911, 2003 Porsche 911, 2002 Porsche 911, and 2001 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
BRAKE TECHNICAL DATA - 911 CARRERA SPECIFICATIONS

Designation Notes, dimensions Wear limit
Operating brake (foot brake)   Hydraulic dual-circuit brake system with front-axle / rear-axle brake circuit division. Vacuum brake booster, internally ventilated and perforated cast iron brake discs with black four-piston monoblock fixed calipers at front and rear axles. (1)(2)
ABS as standard. (1)(2)
As an option: (1)(2)
- up to model 99 with ABS/TC (1)(2)
Brake booster (vacuum)   10 inch
Boost ratio   3.85
Brake master cylinder front 23.81 mm
rear 23.81 mm
Stroke 18/18 mm
Brake proportioning control (3)   1 proportioning valve 5/55 or EBV (3)
Brake discs front 318 mm
rear 299 mm
Effective brake discs front 261.8 mm
rear 247.4 mm
Piston in brake caliper front 2 x 40 + 2 x 36 mm
rear 2 x 30 + 2 x 28 mm
Brake pad area front 254 cm 2
rear 196 cm 2
Total brake pad area   450 cm2
(1) Description of Traction Control (TC) in Repair group 45.
(2) Porsche Stability Management (PSM) with the functions ABS, Traction Control (TC), ABD, MSR (engine drag torque control), FZR (vehicle regulator) and EBV (electronic brake distributor). Passive switching possibility for TC, FZR and MSR.
(3) EBV = electronic brake distributor (brake proportioning control). As a result, no screw-in brake proportioning valves are required.