Hard Rev Limiter - The most basic of rev limiters, a Hard Rev Limiter does nothing until the engine reaches the predefined engine speed at which point fuel and ignition are shut off. What is a Rev Limiter? - A rev limiter is a safety device that cuts fuel, ignition or both at a specified RPM to prevent an engine from continuing to rev beyond its mechanical safety limit. Here is some clarification that will help you to understand some of the functions:.The Porsche Sport Exhaust will automatically switch to its' sport sound.(PDK also has Sport+ mode, more info below) The Triptronic S/ PDK transmission will switch to a more aggressive shifting map that keeps the engine ready to go.The Soft Rev Limiter is replaced with a Hard Rev Limiter allowing you to get full power all the way to redline (more info below).(In normal mode PSM triggers if one wheel is about to lock up, in sport mode it triggers when two wheels are) PSM (Porsche Stability Management) intervention limits are increased to allow more aggressive driving without triggering a system response.PASM is switched to Sport Program to provide more crisp handling and less body roll.The drive by wire throttle map is changed making the car feel more responsive and making 'heel-toe' downshifting easier. When the Sport Chrono button is pressed, many things happen including: This option takes control of many of the Cayman's on board systems delivering absolute sport driving characteristics. Like PASM, the truth about the Sport Chrono Package has eluded many automotive a journalist, many of whom have suggested that Sport Chrono is nothing more than a $920 stop watch, but Sport Chrono is much more than that.
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