The latest evolution of the Porsche Ceramic Composite Brake (PCCB) is available as an option on the Boxster S.
The PCCB disc is made from carbon fiber, making it resistant to heat. The disc compound is silicated in a high-vacuum, high-temperature process.
To maximize cooling in extreme track conditions, the last evolution of PCCB has a modified system of internal vents, with twice the number of cooling channels. This vent geometry facilitates airflow through the disc and, with double the number of channels, there are more internal walls for greater structural stability.
Using ceramic material cut the weight of the PCCB discs by approximately 50% compared with that of conventional cast-iron discs. Less weight means more fun: Reducing both the unsprung and rotating mass of the car improves road-holding during acceleration, braking and cornering maneuvers. At the same time, it improves ride comfort on poor road surfaces.
The discs are gripped by a special brake-pad compound held in the aluminum calipers. Six-piston, monobloc aluminum calipers in front are complemented by four-piston monobloc aluminum at the rear. All four calipers have a distinctive yellow-paint finish.
Porsche Stability Management.
Both Boxster models are equipped with Porsche Stability Management (PSM) as standard.
While it cannot overcome the laws of physics, PSM can provide additional control in difficult driving scenarios. Here's how it works: When the Boxster is in motion, PSM monitors the car's direction, speed, yaw velocity (speed of rotation around the vertical axis) and lateral acceleration.
Based on this information, it can then calculate the actual direction of travel. If your Boxster begins to oversteer or understeer, PSM applies selective braking on the individual wheels to help bring it back into line.
If the wheel approaches the threshold of skidding under braking, PSM uses a modified ABS to shorten the braking distance.
If you're accelerating on wet or other low-grip surfaces, PSM uses the integrated ABD (Automatic Brake Differential) and ASR (Anti-Slip Regulation) functions to help maintain traction and stability.
When Sport mode is selected on the optional Sport Chrono Package, the PSM threshold is higher, allowing greater driver involvement.
If you'd rather enjoy your Boxster unassisted, the system can be set to standby at any time. To enhance your safety, PSM remains present in the background and will only intervene under heavy braking, where both front wheels are being controlled by ABS.
All PSM inputs are more restrained and more precise, thus preserving the natural agility of the car.
Although driving in a safe and prudent manner is the driver's ultimate responsibility, PSM does provide an extra margin of safety whenever you need it most.
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