Quote:
Originally Posted by poweredbym
Quote:
Originally Posted by heavyD^2
What exactly does a track prepped race car have to do with a mass production sports sedan?
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The point is that a fixed caliper design is no doubt superior. You don't see floating calipers in race cars because they want the best consistent braking performance possible.
BMW just decided to go for adequate, which is understandable but not the best.
Quote:
Originally Posted by lemetier
All I hear is the short chime when the switch is pulled but released. It has to be pulled and HELD to activate emergency braking. It has to be held even longer when there is a hydraulic brake system failure (more than 8 seconds). The chime with Emergency Stop activated is loud, constant, and not overridden by any other audible alerts.
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That might be true, but a mechanical cable actuated e-brake is natural and universal in operation across all cars.
Not saying this is a normal thing that would happen a lot. But when needed, still preferred. |
Some race cars do have floating calipers.
The example scenario above doesn't support your argument of a mechanical handbrake benefit either. The brake system in every road car built since 1968 is split into at least 2 channels. That RS3 is split into 8/16. The failure of the right front disconnect doesn't mean all braking is lost. It is split into Primary 1 (Right Front/Left Rear) and Primary 2 (Left Front/Right Rear), along with Secondary 1 (Front Axle) and Secondary 2 (Rear Axle) at the ESP/ABS Hydropump. These are themselves cross linked with check valves, impulse reservoirs, and electromagnetic backup motors for the rear. All the driver had to do was apply and maintain full force on the pedal rather than put on that absurd display of ineptitude.