Technical Values

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Location	Description	Type	Basic value
Brake booster (vacuum)	All (Turbo, GT3/GT3 RS)	Tandem/diameter	9 inches
Brake booster transmission ratio (i)	Turbo	Factor	5.5
Brake booster transmission ratio (i)	GT3/GT3 RS	Factor	3.5
Diameter of brake master cylinder, front/rear	All	Diameter	26.99/26.99 mm
Brake master cylinder stroke, front/rear	All	Dimension	20.5/15.5 mm
Brake disc diameter, front		Diameter	350 mm
Brake disc diameter, front	GT3 as of 2010 model	Diameter	380 mm
Brake disc diameter, rear		Diameter	350 mm
Effective brake disc diameter, front		Diameter	284 mm
Effective brake disc diameter, front	GT3 as of 2010 model	Diameter	315.8 mm
Effective brake disc diameter, rear		Diameter	292 mm
Piston diameter in six-piston brake calliper, front	Turbo and GT3/GT3 RS up to 2009 model	Diameter	2 x 38/2 x 32/2 x 28 mm
Piston diameter in six-piston brake calliper, front	GT3 as of 2010 model	Diameter	2 x 32/2 x 30/2 x 28 mm
Piston diameter in four-piston brake calliper, rear	All	Diameter	4 x 34 mm
Effective brake pad area, front		Area	448 cm²
Effective brake pad area, front	GT3 as of 2010 model	Area	428 cm²
Effective brake pad area, rear		Area	248 cm²
Total brake pad area		Area	696 cm²
Total brake pad area	GT3 as of 2010 model	Area	676 cm²
Pad thickness, front		Measured value	approx. 12.0 mm
Pad thickness, front (wear limit)		Measured value	2 mm
Pad thickness, rear		Measured value	approx. 12.0 mm
Pad thickness, rear (wear limit)		Measured value	2 mm
Brake disc thickness, new (front)		Measured value	34 mm
Brake disc thickness, new (rear)		Measured value	28 mm
Minimum brake disc thickness after machining, front	Brake disc can only be reworked symmetrically, i.e. equally from both sides!	Measured value	32.6 mm
Minimum brake disc thickness after machining, rear	Brake disc can only be reworked symmetrically, i.e. equally from both sides!	Measured value	26.6 mm
Brake disc wear limit, front		Measured value	32.0 mm
Brake disc wear limit, rear		Measured value	26.0 mm
Peak-to-valley surface roughness of brake disc after machining (max.)		Measured value	0.006 mm
Thickness tolerance of brake discs (max.)		Measured value	0.02 mm
Lateral runout of brake disc (max.)		Measured value	0.03 mm
Lateral runout of wheel hub (max.)		Measured value	0.03 mm
Lateral runout of brake disc when installed (max.)		Measured value	0.06 mm
Pushrod play	Measured at brake pedal plate	Measured value	approx. 1 mm
Diameter of parking-brake drum	Parking brake/hand brake (drum brake acting mechanically on both rear wheels)	Diameter	180 mm
Diameter of parking-brake drum, wear limit		Diameter	181 mm
Width of parking-brake shoe		Measured value	25 mm
Thickness of parking-brake pad		Measured value	4.5 mm
Thickness of parking-brake pad, wear limit		Measured value	2 mm
Brake booster diameter (vacuum)	All (Turbo, GT3/GT3 RS)	Tandem/diameter	9 inches
Brake booster transmission ratio (i)	Turbo	Factor	5.5
Brake booster transmission ratio (i)	GT3/GT3 RS	Factor	3.5
Diameter of brake master cylinder, front/rear	All	Diameter	26.99/26.99 mm
Brake master cylinder stroke, front/rear	All	Dimension	20.5/15.5 mm
Brake disc diameter, front		Diameter	380 mm
Brake disc diameter, rear		Diameter	350 mm
Effective brake disc diameter, front		Diameter	315.8 mm
Effective brake disc diameter, rear		Diameter	292 mm
Piston diameter in six-piston brake calliper, front	Turbo	Diameter	2 x 36 mm
Piston diameter in six-piston brake calliper, front	Turbo	Diameter	2 x 32 mm
Piston diameter in six-piston brake calliper, front	Turbo	Diameter	2 x 28 mm
Piston diameter in six-piston brake calliper, front	GT3/GT3 RS	Diameter	2 x 32 mm
Piston diameter in six-piston brake calliper, front	GT3/GT3 RS	Diameter	2 x 30 mm
Piston diameter in six-piston brake calliper, front	GT3/GT3 RS	Diameter	2 x 28 mm
Piston diameter in four-piston brake calliper, rear	All	Diameter	4 x 34 mm
Effective brake pad area, front		Area	448 cm²
Effective brake pad area, rear		Area	248 cm²
Total brake pad area		Area	696 cm²
Pad thickness, front		Measured value	approx. 12.0 mm
Pad thickness, front (wear limit)		Measured value	2 mm
Pad thickness, rear		Measured value	approx. 12.0 mm
Pad thickness, rear (wear limit)		Measured value	2 mm
Brake disc thickness, new (front)		Measured value	34 mm
Brake disc thickness, new (rear)		Measured value	28 mm
Brake disc wear limit, front	Minimum brake disc thickness (wear limit) is stamped on the brake-disc chamber. Example: Min. Th. 33.7 mm	Measured value	mm (Read value on brake-disc chamber) X.XX
Brake disc wear limit, rear	Minimum brake disc thickness (wear limit) is stamped on the brake-disc chamber. Example: Min. Th. 27.7 mm	Measured value	mm (Read value on brake-disc chamber) X.XX
Wear limit: Surface changes in front and rear brake discs	Wear limit: Connected surface fracture > 1 cm² and/or surface roughness of brake disc > 80 micrometer. Replace PCCB brake discs on each axle.	Surface changes	Values and procedure for: checking front 46 51 02 PCCB brake discs/checking rear 46 54 02 PCCB brake discs.
Thickness tolerance of brake discs (max.)		Measured value	0.02 mm
Lateral runout of brake disc (max.)		Measured value	0.03 mm
Lateral runout of wheel hub (max.)		Measured value	0.03 mm
Lateral runout of brake disc when installed (max.)		Measured value	0.06 mm
Pushrod play	Measured at brake pedal plate	Measured value	approx. 1 mm
Diameter of parking-brake drum	Parking brake/hand brake (drum brake acting mechanically on both rear wheels)	Diameter	180 mm
Diameter of parking-brake drum, wear limit		Diameter	181 mm
Width of parking-brake shoe		Measured value	25 mm
Thickness of parking-brake pad		Measured value	4.5 mm
Thickness of parking-brake pad, wear limit		Measured value	2 mm