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I know I won't be allowed to go fast enough for PSM to even be an issue for a few sessions, maybe even a few days or a couple of events, but I'd like to know what this forum thinks - should I begin my learning process with PSM off or on? I understand PSM will always kick in if need be. I am not at all concerned that PSM may slow me down or hamper my laps times. What I am getting at is in the long long run will I become a better driver by starting the learning process with PSM off or on?
btw, I think I should mention that I am have your typical toxic male mix of overconficdence and lack of fear. But I know the club rules and my instructors will keep that in check. Just being honest about my shortcomings.
Much thanks!
PSM - Porsche Stability Management
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.
I know I won't be allowed to go fast enough for PSM to even be an issue for a few sessions, maybe even a few days or a couple of events, but I'd like to know what this forum thinks - should I begin my learning process with PSM off or on? I understand PSM will always kick in if need be. I am not at all concerned that PSM may slow me down or hamper my laps times. What I am getting at is in the long long run will I become a better driver by starting the learning process with PSM off or on?
btw, I think I should mention that I am have your typical toxic male mix of overconficdence and lack of fear. But I know the club rules and my instructors will keep that in check. Just being honest about my shortcomings.
Much thanks!
When you read how a pro learns a track they start out extremely slow - by walking it. Then they drive slow and try to learn the lines. Then they accelerate a bit and slowly build up to their performance speeds.
I recommend that you leave the PSM on. How it will manifest itself is by (perhaps) slowing you down a bit if you are a bit aggressive on the throttle coming out of a corner. That's a good thing to be slowed down at. We call it Please Save Me - it's not a bad thing at all.
The way our PCA club teaches corners you brake linearly on the way into the corner, take your foot off the brake as you do the corner and don't get on the gas until you can see your way through the apex. This is seen as a safe way to start out. PSM won't do much if you drive this way - again - it will only help and not hurt.
Finally there was a lawsuit (last year?) where someone had turned off the stability system on their car and then gotten into an accident. Turning off the stability system created additional liability for the local club and for the driver. Again - I would recommend leaving PSM on.
My view is that I want to bring my car back without wrinkling the metal. I don't want a $5k re-alignment exercise to go through. I want to be a better driver and I want to learn to safely drive faster. I am more likely to accomplish all this with PSM on.
There's people at the track who don't have PSM (older vehicles) or who turn it off. It's a choice but I have an obvious bias.
D.
PSM - Porsche Stability Management
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.
PCA - Porsche Club Of America
The Porsche Club of America - http://www.pca.org
CaymanClub.Net members who are also PCA members should request access to the PCA Member only forum by filling in their PCA Member ID# into their profile and then requesting a group membership addition, both of which can be done in the User Control Panel (User CP)
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If you need PSM at your first DE, then you are doing something wrong. I strongly recommend keeping it on, because it will save you (PSM = Please Save Me). Once you have a few DEs under your belt, you'll have more experience to choose whether you need/want it or not. Like Dfogal said, and has been reiterated to me several times ... You go to a DE to have fun. If you crash your car, it really wouldn't be too much fun. Have a blast, be safe, and only do what you are comfortable with.
PSM - Porsche Stability Management
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.
__________________
"The Cayman doesn't need any more toys." -- My wife
btw, I think I should mention that I am have your typical toxic male mix of overconficdence and lack of fear.
Add in inexperience and you've got a dangerous mix. Leave PSM on. It may save you from your mistakes and likely won't interfere with your driving at all if you're reasonably smooth. When you get to the point that you can rotate your car with full control, turn off PSM.
Oh, and leave your ego at the front gate. You'll be passed by faster drivers in slower cars and you'll pass slower drivers in faster cars. Neither means much at a DE. Have fun.
PSM - Porsche Stability Management
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.
I think this is one of those questions, if you have to ask, leave it on
Perhaps by the time you get to Intermediate II then it's a good time to re-evaluate. If you have SC, you could turn it on to give you a higher threshold before PSM kicks in.
Your number 1 goal is to come out of this without any damage*. Number 2 is to learn to drive the track smoothly. Speed will come naturally as you learn the first 2, and as your brain becomes acclimated to the speed. (something forgotten by even veterans at times). By the end of the weekend, you will be surprised how fast you are moving.
* Having fun is actually number 1 but they go hand-in-hand
PSM - Porsche Stability Management
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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It may save you from your mistakes and likely won't interfere with your driving at all if you're reasonably smooth.
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
PSM - Porsche Stability Management
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.
PCA - Porsche Club Of America
The Porsche Club of America - http://www.pca.org
CaymanClub.Net members who are also PCA members should request access to the PCA Member only forum by filling in their PCA Member ID# into their profile and then requesting a group membership addition, both of which can be done in the User Control Panel (User CP)
I just went to my first DE last month (April 18 2008) at Summit Point, WV. I will advise you to leave it on, there was a novice, like myself, in my group in a Honda S2000 in front of me, which spun a 180. He would not give me way prior to this, which turns out that his instructor was egging him on to push harder.
Be on the safe side, leave it on, at best, you will only feel it kicking in when you punch it out of a corner, since the car lacks a limited slip or TBD. That is what I did and I lived to tell another day with no damages.
LSD - Limited Slip Differential
A limited slip differential (LSD) is a modified or derived type of differential gear arrangement that allows for some difference in rotational velocity of the output shafts, but does not allow the difference in speed to increase beyond a preset amount. In an automobile, such limited slip differentials are sometimes used in place of a standard differential, where they convey certain dynamic advantages, at the expense of greater complexity.
The main advantage of a limited slip differential is found by considering the case of a standard (or "open") differential where one wheel has no contact with the ground at all. In such a case, the contacting wheel will remain stationary, and the non-contacting wheel will rotate freely– the torque transmitted will be equal at both wheels, but will not exceed the threshold of torque needed to move the vehicle, thus the vehicle will remain stationary. In everyday use on typical roads, such a situation is very unlikely, and so a normal differential suffices. For more demanding use however, such as driving off-road, or for high performance vehicles, such a state of affairs is undesirable, and the LSD can be employed to deal with it. By limiting the velocity difference between a pair of driven wheels, useful torque can be transmitted as long as there is some friction available on at least one of the wheels.
To see the installation of a LSD style unit Click Here -> Article Forthcoming Stay Tuned
Until 
