Technical Values
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2019 Porsche 911, 2018 Porsche 911, 2017 Porsche 911, 2016 Porsche 911, and 2015 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.
| Location | Description | Type | Basic value | Tolerance 1 | Tolerance 2 |
|---|---|---|---|---|---|
| Brake booster (vacuum) | C2/C4 | Tandem/diameter | 8/9 Zoll | ||
| Brake booster transmission ratio (i) | C2/C4 | Factor | 5.5 | ||
| Diameter of brake master cylinder, front/rear | C2/C4 | Diameter | 26.99/26.99 mm | ||
| Brake master cylinder stroke, front/rear | C2/C4 | Measured value | 24/12 mm | ||
| Brake disc diameter, front | C2/C4 | Diameter | 330 mm | ||
| Brake disc diameter, rear | C2/C4 | Diameter | 330 mm | ||
| Effective brake disc diameter, front | C2/C4 | Diameter | 277.8 mm | ||
| Effective brake disc diameter, rear | C2/C4 | Diameter | 274.6 mm | ||
| Piston diameter in four-piston brake calliper, front | C2/C4 | Diameter | 4 x 38 mm | ||
| Piston diameter in four-piston brake calliper, rear | C2/C4 | Diameter | 4 x 32 mm | ||
| Effective brake pad area, front | C2/C4 | Area | 286 cm2 | ||
| Effective brake pad area, rear | C2/C4 | Area | 200 cm2 | ||
| Total brake pad area | C2/C4 | Area | 486 cm2 | ||
| Brake booster (vacuum) | C2S/C4S | Tandem/diameter | 8/9 Zoll | ||
| Brake booster transmission ratio (i) | C2S/C4S | Factor | 5.5 | ||
| Diameter of brake master cylinder, front/rear | C2S/C4S | Diameter | 26.99/26.99 mm | ||
| Brake master cylinder stroke, front/rear | C2S/C4S | Measured value | 24/12 mm | ||
| Brake disc diameter, front | C2S/C4S | Diameter | 340 mm | ||
| Brake disc diameter, rear | C2S/C4S | Diameter | 330 mm | ||
| Effective brake disc diameter, front | C2S/C4S | Diameter | 286.6 mm | ||
| Effective brake disc diameter, rear | C2S/C4S | Diameter | 274.6 mm | ||
| Piston diameter in six-piston brake calliper, front | C2S/C4S | Diameter | 2 x 34 mm | ||
| Piston diameter in six-piston brake calliper, front | C2S/C4S | Diameter | 2 x 32 mm | ||
| Piston diameter in six-piston brake calliper, front | C2S/C4S | Diameter | 2 x 30 mm | ||
| Piston diameter in four-piston brake calliper, rear | C2S/C4S | Diameter | 4 x 32 mm | ||
| Effective brake pad area, front | C2S/C4S | Area | 348 cm2 | ||
| Effective brake pad area, rear | C2S/C4S | Area | 252 cm2 | ||
| Total brake pad area | C2S/C4S | Area | 600 cm2 | ||
| Pad thickness, front | All | Measured value | approx. 12.0 mm | ||
| Pad thickness, front (wear limit) | All | Measured value | 2 mm | ||
| Pad thickness, rear | All | Measured value | approx. 12.0 mm | ||
| Pad thickness, rear (wear limit) | All | Measured value | 2 mm | ||
| Brake disc thickness, new (front) | C2/C4 | Measured value | 28 mm | ||
| Brake disc thickness, new (front) | C2S/C4S | Measured value | 34 mm | ||
| Brake disc thickness, new (rear) | All | Measured value | 28 mm | ||
| Brake disc minimum thickness after machining, front C2/C4 | Brake disc can only be reworked symmetrically, i.e. equally from both sides! | Measured value | C2/C4 = 26.6 mm | ||
| Brake disc minimum thickness after machining, front C2S/C4S | Brake disc can only be reworked symmetrically, i.e. equally from both sides! | Measured value | C2S/C4S = 32.6 mm | ||
| Brake disc minimum thickness after machining, rear, all | Brake disc can only be reworked symmetrically, i.e. equally from both sides! | Measured value | All = 26.6 mm | ||
| Brake disc wear limit, front | C2/C4 | Measured value | 26.0 mm | ||
| Brake disc wear limit, front | C2S/C4S | Measured value | 32.0 mm | ||
| Brake disc wear limit, rear | All | Measured value | 26.0 mm | ||
| Peak-to-valley surface roughness of brake disc after machining (max.) | All | Measured value | 0.006 mm | ||
| Thickness tolerance of brake discs (max.) | All | Measured value | 0.02 mm | ||
| Lateral runout of brake disc (max.) | All | Measured value | 0.03 mm | ||
| Lateral runout of wheel hub (max.) | All | Measured value | 0.03 mm | ||
| Lateral runout of brake disc when installed (max.) | All | Measured value | 0.06 mm | ||
| Push-rod play | Measured at brake pedal plate | Measured value | approx. 1 mm | ||
| Diameter of parking-brake drum | Parking brake (electrically actuated, drum brake acting on the rear axle) | Diameter | 180 mm | ||
| Diameter of parking-brake drum, wear limit | All | Diameter | 181 mm | ||
| Width of parking-brake shoe | All | Measured value | 25 mm | ||
| Thickness of parking-brake pad | All | Measured value | 4.5 mm | ||
| Thickness of parking-brake pad, wear limit | All | Measured value | 2 mm | ||
| Brake booster diameter (vacuum) | C2/C2S/C4/C4S | Tandem/diameter | 8/9 Zoll | ||
| Brake booster transmission ratio (i) | C2/C2S/C4/C4S | Factor | 5.5 | ||
| Diameter of brake master cylinder, front/rear | C2/C2S/C4/C4S | Diameter | 26.99/26.99 mm | ||
| Brake master cylinder stroke, front/rear | C2/C2S/C4/C4S | Measured value | 24.0/12.0 mm | ||
| Brake disc diameter, front | C2/C2S/C4/C4S | Diameter | 350 mm | ||
| Brake disc diameter, rear | C2/C2S/C4/C4S | Diameter | 350 mm | ||
| Effective brake disc diameter, front | C2/C2S/C4/C4S | Diameter | 286.6 mm | ||
| Effective brake disc diameter, rear | C2/C2S/C4/C4S | Diameter | 294 mm | ||
| Piston diameter in six-piston brake calliper, front | C2/C2S/C4/C4S | Diameter | 2 x 34 mm | ||
| Piston diameter in six-piston brake calliper, front | C2/C2S/C4/C4S | Diameter | 2 x 32 mm | ||
| Piston diameter in six-piston brake calliper, front | C2/C2S/C4/C4S | Diameter | 2 x 30 mm | ||
| Piston diameter in four-piston brake calliper, rear | C2/C2S/C4/C4S | Diameter | 4 x 32 mm | ||
| Effective brake pad area, front | C2/C2S/C4/C4S | Area | 424 cm2 | ||
| Effective brake pad area, rear | C2/C2S/C4/C4S | Area | 252 cm2 | ||
| Total brake pad area | C2/C2S/C4/C4S | 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 | |||
| Brake disc wear limit, front | Minimum brake disc thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th. 33.7 mm | Measured value | mm (Read value on brake disc hub) X.XX |
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| Brake disc wear limit, rear | Minimum brake disc thickness (wear limit) is stamped on the brake disc hub. Example: Min. Th. 27.7 mm | Measured value | mm (Read value on brake disc hub) X.XX |
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| 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 | |||
| Push-rod play | Measured at brake pedal plate | Measured value | approx. 1 mm | ||
| Diameter of parking-brake drum | Parking brake (electrically actuated, drum brake acting on the rear axle) | 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 |