Porsche Carrera 911 997 owners manual page 65

text version of content this owner's manual page from owners manual to the vehicle Porsche Carrera 911, year of production 2004 - 2011:

Porsche Traction Management Dynamometer testing procedure Brake tests (PTM) Some U.S. states and Canadian provinces con-Brake tests must be performed only on plate-type With PTM, the engine power is variably distributed duct emissions inspection/maintenance testing in-test stands or roller test stands. to the front and rear wheels. volving the use of two-wheel dynamometer. Power distribution between the front and rear ax-A two-wheeled dynamometer is a treadmill type The ignition must be off. les is performed by a map-conrolled multiple-disc device upon which a single axle of the car, the dri-The following limit values must not be exceeded clutch. ving axle of the vehicle, rotates to simulate vehicle on roller test stands: operation on the road while the vehicle remains Distribution of the engine power also depends on stationary. – Testing speed 5 mph (8 km/h) the difference in wheel speed between the two ax-Your vehicle has a full-time four-wheel drive system – Test duration 20 seconds les. which cannot be disabled. Severe damage to the The multiple-disc clutch always delivers sufficient powertrain can result if tested on a two-wheel dy-Handbrake tests drive power to the front wheels to ensure optimum namometer. propulsion even on an unfavorable road surface. Handbrake tests on the roller test stand must only In combination with the Porsche Stability Manage- Warning! be carried out with the ignition switched off . ment (PSM), the PTM ensures optimum handling and high driving stability. Risk of severe powertrain damage and a pos-Balancing wheels on the vehicle sible unexpected movement of the vehicle. Warning! f Do not test your vehicle on a two-wheel dyna-During finish balancing of the wheels, the vehicle The increased control that is provided should mometer. must be hoisted and all the wheels able to rotate not induce you to take greater risks with your f Advise the emission station of this warning be-freely. safety. The limits dictated by the laws of phy-fore testing the vehicle. sics cannot be overcome, even with PTM. Towing The risk of accidents due to inappropriate f Please see the chapter “TOWING” on speed cannot be reduced, even by PTM. The driver bears the responsibility for all dri- Page 280. ving maneuvers. f Adapt your driving style to the prevailing road Wheels/Tires and weather conditions. The PTM control unit is adapted to the approved f Obey all traffic laws. tire sizes. The use of non-approved tire sizes may lead to deviations in wheel speeds and it may influ- ence handling or result in the PTM switching off. Operation, Safety 63

owners manual Porsche Carrera 911

owners manual Porsche Carrera 911 - year of production: 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 - Porsche Carrera 911 997 owners manual EN