Technical Data - C2/C4 As Of MY 2009
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.
Operating brake (foot brake):
- Dual-circuit brake system with brake-circuit division per axle.
- Internally ventilated and perforated grey cast iron brake discs on front and rear axle.
- Four-piston monobloc calliper on front and rear axle.
- Standard Porsche Stability Management (PSM 8.0).
| Location | Description | Type | Basic value | Tolerance 1 | Tolerance 2 |
|---|---|---|---|---|---|
| Brake booster (vacuum) | C2 | Diameter | 10 inches | ||
| Brake booster transmission ratio (i) | C2 | Factor | 4.5 | ||
| Brake booster (vacuum) | C4 | Tandem/diameter | 9 inches | ||
| Brake booster transmission ratio (i) | C4 | Factor | 5.5 | ||
| Diameter of brake master cylinder, front/rear | C2/C4 | Diameter | 25.4/25.4 mm | ||
| Brake master cylinder stroke, front/rear | C2/C4 | Dimension | 20.5/15.5 mm | ||
| Brake disc diameter, front | Diameter | 330 mm | |||
| Brake disc diameter, rear | Diameter | 330 mm | |||
| Effective brake disc diameter, front | Diameter | 277.8 mm | |||
| Effective brake disc diameter, rear | Diameter | 272.6 mm | |||
| Piston diameter in four-piston brake calliper, front | 4x | Diameter | 38 mm | ||
| Piston diameter in four-piston brake calliper, rear | 4x | Diameter | 34 mm | ||
| Effective brake pad area, front | Area | 286 cm2 | |||
| Effective brake pad area, rear | Area | 250 cm2 | |||
| Total brake pad area | Area | 536 cm2 |