Technical Data - C2/C4 As Of MY 2009
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 |