The refined PSM also helps drivers apply full braking force when needed. If the driver hits the · brake pedal hard, but not with f

The refined PSM also helps drivers apply full braking force when needed. If the driver hits the brake pedal hard, but not with full force, PSM instructs the hydraulic pump to apply the rest, right up to the ABS threshold. Like all Porsche dynamic safety-enhancement systems, the enhanced PSM does not interfere with a skilled enthusiast's pleasure. If the driver doesn't increase his pressure on the brake pedal past a certain point, the additional pressure built up by the system is reduced. Critically, the pressure booster does not always cut in. And since Porsche engineers firmly believe that the driver is always in command of the car's dynamics, the additional functions are deactivated if the driver presses the Sports button or switches the PSM off. Even more traction is available for the Turbo Coupe compliments of an optional mechanical differential lock with asymmetric distribution. The differential lock is available only with the manual gearbox and provides 22 percent locking under power, 27 percent otherwise. This differential complements PTM's qualities by allowing higher traction on the inner wheel when tackling a fast corner. Always under the driver's command Given the demands and expectations of the typical Porsche driver, PSM has been designed to act seamlessly and all but invisibly. Porsche engineers programmed the system to allow the driver to fully enjoy the Turbo Coupe's agility and speed without coarse interference and abrupt actions. But the highly skilled, enthusiast driver who may wish to fully experience the Turbo's balance and ultimate handling limits can temporarily switch off PSM. The system automatically re-engages when one of the front brakes exceeds the ABS control threshold. Sports Chrono Package Turbo option The available Sports Chrono Package Turbo provides the choice of an even more sporting set-up of various vehicle functions, including engine and Tiptronic S management, and profiles of the Porsche Stability Management (PSM), Porsche Active Suspension Management (PASM) and Porsche Traction Management (PTM). The option also brings overboost. By hitting the Sport button on the center console, the driver engages overboost. This briefly increases turbocharger pressure when accelerating under full throttle. An arrow in the turbocharger boost display informs the driver that the car is in overboost. This additional boost of turbocharger pressure is achieved by adjusting the turbocharger blades to increase maximum turbocharger pressure by approximately 2.9 psi (0.2 bar), in the engine speed range of 2100 to 4000 rpm. The extra high level of turbo boost lasts for about ten seconds allowing the driver to confidently execute a fast maneuver. Standard and optional Besides the Sports Chrono Package Turbo, there are several other optional features available for the Turbo Coupe.