Quote:
Originally Posted by STLPCA
It may save you from your mistakes and likely won't interfere with your driving at all if you're reasonably smooth.
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Great comment.
I recently took part in a
PCA DE driving instructors class, and opted to leave it fully engaged (
PSM On,
SC Off). While I was surely not driving 10/10nths, I was expecting to feel
PSM intervene exiting tight corners, and perhaps entering a few corners too fast, but in reality, I never noticed it all.
In an AX situation on tight sources (tight meaning some 1st gear sections), it is very noticeable as it cuts the throttle to combat wheel spin, and when late braking when the ABS part of the system kicks in. In AX, it is always turned Off.
But on an open track, where there was nothing below 2nd gear, it was surprisingly unobtrusive. That said, no timing was present, but I did not at all sense that it was slowing me down.
So, to add another answer to your original question, definitely leave
PSM fully engaged.
Brian
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PSM - Porsche Stability Management
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While it can’t overcome the laws of physics, the revolutionary Porsche Stability Management (PSM) system does lend an added degree of balance and control to the Cayman’s mid-engine driving dynamics, inspiring surefooted confidence in corners and extreme situations.
A standard feature on the Cayman and Cayman S, PSM continuously monitors steering input, road speed, yaw velocity and lateral acceleration to calculate the actual direction of travel. If the car begins to steer off line, PSM instantly intervenes with precision brake inputs on individual wheels to help bring the car back onto the driver’s intended path.
If braking alone isn’t enough to correct the vehicle’s cornering line, PSM then calls on the Cayman’s engine management system, adjusting engine output as needed to help stabilize handling. PSM can also compensate in an instant for mid-corner changes in load resulting from deceleration or braking. When Sport mode is selected with the optional Sport Chrono Package, PSM’s threshold for intervention is raised, allowing for greater driver involvement. If you prefer driving without automatic PSM assistance, the system can be set to standby at any time. In this case, it will only intervene under heavy braking, where both front wheels exceed the ABS threshold.
For all of its technical ability, PSM goes virtually unnoticed in everyday driving situations, preserving the Cayman’s natural agility. |
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