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Hey, I had already posted my questions in another topic, but I thought I'd make my own so that I dont hijack another person's topic.
Some question that I just cant answer; You see, in the AX around here, there are several "figures" that can NEVER be done with PSM on, not even if SC on.
1. There are many places where a 180' spin around a barrel or so is a must, any idea what is the most time efficient way to do that with a tip!
2. The part where I think the midengined RWD cars would never make it, is the part where one has to do a 180' then reverse between 2 barrels/cones, then swing the car around and head off! Any ideas?
And the thing is, as a beginner, I'm afraid that having PSM off would get me into serious trouble, especially since this is my first RWD car!
________________________
"Sir! We're surrounded!" - "Excellent! We can shoot in any direction!"
A good car will get you from point A to point B. A great car... will just get you into trouble!
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.
Maybe someone else will chime in with exacts. I wanted to share with you some general stuff I have learned AXing in the last year. So far I had 3 AX instructors (2 drive Pcars and one Dinan M3) all told me that if I set off Porsche PSM, I am not driving smooth enough. One suggested I leave it on until I get good at it, so at least if I make a huge mistake, I don't fly into course workers.
What helped me to get better is thinking of Cayman as if it was a woman. She hates to be tossed and mistreated. Now treat her right, be smooth, and she will give you experience of a lifetime. (These comments are my wife approved Had her look at it, so I don't get into trouble here )
Order "Secrets of Solo Racing" by Henry A. Watts. Ever since I bought the book, I have been re-reading it every time before I go to AX events. It covers theory and techniques very well.
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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Thanks for the help apsinkus, still PSM on is no choice for me, because it'd never let me do a 180'
________________________
"Sir! We're surrounded!" - "Excellent! We can shoot in any direction!"
A good car will get you from point A to point B. A great car... will just get you into trouble!
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.
Making a U around a single cone or barrel can be tough whether Tip or not. The fastest way from what I was taught, was to approach it just like a mini-sweeper: approach on the outside, brake late and turn-in to catch a very late apex as you get on the gas.
This is one situation where it helps to left-foot brake and downshift to first gear (which is easier in a Tip) - just make sure the car is settled and fairly straight before you get hard on the gas in 1st or you'll spin the inside tire (we need our LSD/TBD ! ).
The alternative is to approach the turn pretty fast, trail brake as you turn in to try to get the rear to break loose as you round the cone and drift or slide around - depending on how much room you have (again downshifting to first for the exit). If you're going fast enough, or the surface is a little slippery, you will probably have enough momentum to overcome the PSM (turned off). It's a bit sloppier, and usually slower, and you risk taking out a lot of cones, but it looks like you're having fun.
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 TBD style unit Click Here
To see the installation of a LSD style unit Click Here -> Article Forthcoming Stay Tuned
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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To view links or images in signatures your post count must be 5 or greater. You currently have 0 posts.
2006 CS Tip (Daily Driver & Part-time Track Toy)
2005 Ford Expedition (to haul the CS)
2006 Lexus RX400h (wifey's)
Gone, but not forgotten: 2002 WRX, 2004 MINI
Last edited by KS-CS; 04-29-2008 at 03:56 PM.
Reason: sp.
PSM will allow you to slide 180 (done it myself successfully once at the AX) as long as it is a smooth drift rather than jerking the car into the turn and than making the breaks get into ABS. As I recall, I think it worked because I fed the power just at the right time smooth enough to break loose the back a bit.
Re. alignment, nope, have not done it yet. I am going though to the AX school this Saturday. Should be fun, since I will be getting a lot of seat time.
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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First, I would suggest finding a large parking lot where you can practice without hitting something or getting arrested. Put a cone out and try a few things.
PSM is definitely a problem if the course has a turn which requires breaking loose the rear end and sliding it around. With my last performance car (many years ago) I would routinely do U-turns on narrow streets by braking to set weight transfer to the front, start turn, then add throttle to break loose the rear and slide it around until I was facing the other direction.
This is a low speed turn - less than 25 MPH, front wheels rolling, only rear wheels sliding. This is NOT a "bootleg", a high speed turn where you use the emergency brake to lock the rear wheels to rotate the car 180 degrees.
Without thinking, I tried the low speed turn in the CS with PSM on; it does not work - you just end up driving off the road at low speed, because the back end does not rotate, the brakes are applied to retain rear traction. If you cannot drive the U-turn at low speed, you cannot make it with PSM on.
See if you can get the rear loose with PSM off. If you cannot, I think that the last alternative is to use the emergency brake to lock the rear wheels, then turn. This should bring the rear around, but is a lot more difficult to control. Try in a big empty parking lot.
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.
__________________
....its even SAFETY YELLOW! What could be more practical???
titanic, in some areas there is very little room, I could navigate it with no problem using my FWD C4 using the e-brake.
apsinkus, as facelvega mentioned, I dont think its possible to do a U with PSM on, I tried it once, and ended up going in a very wide circle, luckily nothing was around to hit.
Now any idea about how to do the 180' reversing slide?!
________________________
"Sir! We're surrounded!" - "Excellent! We can shoot in any direction!"
A good car will get you from point A to point B. A great car... will just get you into trouble!
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 c
Until 
Need advice for AX, no AX schools around!
Had her look at it, so I don't get into trouble here 
)
