The Porsche 928 S4, produced from 1987 to 1991, is a grand tourer celebrated for its blend of performance and comfort. While the factory braking system was capable for its time, enthusiasts seeking enhanced performance and longevity for mixed-use driving often consider upgrades. Carbon Ceramic Brake (CCB) technology presents a compelling option, offering potential improvements in several key engineering areas without sacrificing daily drivability. This article explores the characteristics of CCB rotors as an alternative to the original iron brake setup.
Does Rotor Mass Reduction Affect Turn-In and Ride Response?
Carbon ceramic rotors are typically up to 40-50% lighter than their cast iron counterparts. This reduction in unsprung weight can contribute to a more responsive suspension, potentially improving turn-in feel and overall ride quality. With less rotational inertia, the suspension has to manage less mass, which may lead to better road holding and a more connected driving experience. This is particularly relevant for a grand tourer like the 928 S4, where a balance of comfort and performance is desired.
Can Carbon Ceramic Brakes Maintain Friction at Elevated Temperatures?
Standard iron brake rotors can experience performance degradation at high temperatures due to brake fade. Carbon ceramic rotors, however, are designed to maintain a high and consistent friction coefficient at temperatures exceeding 900°C. This thermal stability can contribute to improved braking consistency during spirited driving or track sessions. Advanced coatings may further enhance thermal tolerance, helping to ensure reliable braking performance even under demanding conditions.
What Lifecycle Profile Is Typical for Carbon Ceramic Rotor Systems?
While iron rotors may require replacement at varying intervals depending on driving style and conditions, carbon ceramic discs are designed for extended service life. Under normal street-driving conditions, CCB rotors are designed to last up to 300,000 km. However, actual lifespan depends on driving habits, pad compounds, and environmental factors. The exceptional wear resistance of carbon ceramic materials can translate to reduced long-term maintenance costs.
How Do CCB Rotors Behave in Corrosive Road Environments?
CCB technology can significantly reduce the corrosive brake dust commonly associated with high-performance iron pads, helping to keep alloy wheels cleaner. Furthermore, the material is highly resistant to oxidation and road salts, which can reduce the surface corrosion visible on traditional iron rotors. This resistance to corrosion can contribute to a cleaner, more aesthetically pleasing appearance over the lifespan of the braking system.
Material Engineering Snapshot: Continuous Fiber C/SiC Explained
Premium CCBs may utilize Continuous Long Carbon Fiber (T700 Grade) woven into a 3D matrix with Silicon Carbide. This advanced construction offers a more robust structure compared to chopped-fiber alternatives. A floating aluminum hat (bell) system is typically employed to manage thermal expansion effectively. This sophisticated material engineering can contribute to superior performance and durability in demanding braking applications.
For Porsche 928 S4 owners seeking to elevate their driving experience, upgrading to carbon ceramic brakes represents a significant investment in performance and longevity. While CCB systems offer numerous advantages, including reduced weight, improved thermal stability, and extended service life, it's crucial to consider individual driving needs and consult with a qualified brake specialist to determine the best solution. Professional consultation ensures proper installation and optimal performance of the braking system.
