Dear Unregistered, the permission changes should be complete, if you notice any issues with your access on the site please let us know and we will check into it.
Hey Unregistered it seems that you haven't posted a message in our forums yet. Please join in on the fun and post a message!
Dear Unregistered,
We've noticed that you are not yet a member of our Cayman Insiders group. This group provides a number of additional value-add services via this website for a very low annual fee. You can find out more about this group here:
Insider Announcement
You can join the Cayman Insiders Group here:
Insider Enrollment Form
We hope to see you "Inside" soon!
Cayman Tires & WheelsDiscussion of Tires, Wheels, Suspension, etc.
Your Donation Will Be Used To Pay For our ever increasing bandwidth costs, our hosting Service, domain registration, software licensing fees, maintenance costs and product evaluations Only!
Please enter your donation amount above, and then click on the donate button below.
I live in Atlanta and the last couple of days it has been in the low 20s here (very cold for Atlanta). Drove to work today as it was a fairly sunny day. On the way to work no problems as the tires were relatively warm from sitting in my garage but on the way home (and after sitting in a 20 degree parking garage all day) the loss of traction was very noticeable. Wierd thing was the tires kind of hopped (spin then grab, spin then grab) as opposed to smoothly spinning. I think perhaps traction control kicked in but I saw no dash indicator. I have the standard Michelin PS2s. In any case now I know - Porsche isn't kidding when they give a temperature limit for the tires!!!!
Jim Ellis Porsche
Porsche.... The driving experience is utterly unlike any other. When it comes to the finest in workmanship, technology, and exclusivity, there is no competition. Along with our certified sales professionals, we have the most highly trained service technicians in the industry. Most importantly, after 24 years with Porsche, we have a long history of customer loyalty and commitment to customer care that sets us apart from the crowd. We relish selling and servicing one of the most desired brand names in North America, Porsche. We welcome you and we hope you enjoy your visit - virtual or preferably, in person! We look forward to seeing you.
Yea, I noticed the PS2s started getting a little slippery when they got down to the 40 degree range.
My Alpins are a little slippy when they're 20 degrees also, but they seem to "warm up" to better traction pretty quickly.
__________________ My Blogs
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
Wierd thing was the tires kind of hopped (spin then grab, spin then grab) as opposed to smoothly spinning. I think perhaps traction control kicked in but I saw no dash indicator.
It is nice and smooth with a TBD and sport mode. Both tires pull evenly and while they still both spin, it is significantly more controlled. I haven't broken out into donuts yet but I may just do that if we stay in the 20s through the weekend .
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
__________________
"The Cayman doesn't need any more toys." -- My wife
With lows in the 20's the Cayman is going to be parked today and tomorrow but it is supposed to be up in the low 60's by Sunday and high 60's by mid-week.
I wonder is the size of the tire makes any difference. In other words, would a 17" wheel/tire combination flex more and generate more heat than an 18" or 19" wheel/tire combination? I'm running 17" wheels/tires during the winter to save my 18" "S" wheels from potholes.
__________________
Porsche Cayman 2.7
Mercedes E320 Bluetec
Ducati Paul Smart LE
BMW R1200GS
I've hesitated to post this, but I have a great deal of fun driving the Cayman at those temps because of the loss of traction. Power slides are easily achieved by just modulating power. Below freezing the car effortlessly brings the tail out and can go around turns in a nice controlled drift.
If you're not comfortable driving sideways, I don't recommend trying this. but if you are comfortable, it can be a great deal of fun. If you don't turn PSM off, it shuts you down real fast. I've also found that if you go to PASM sport mode I get no wheel hop and the car stays very flat and controllable as the tail comes out. But be careful, it all happens much faster in the Cayman than it does in a front engine rear drive car. You need to be very gentle, and if you are the car is very controllable and can acheive a very smooth slightly tail out drift.
PASM - Porsche Active Suspension Management
This active damping system offers continuous adjustment of individual damping forces based on current road conditions and driving style.
The driver can choose from two setup modes, ‘Normal’ and ‘Sport’, using a separate ‘damper’ button on the center console. ‘Normal’ mode is designed for general road driving and circuits with uneven tarmac. ‘Sport’ mode is intended for smoother track surfaces, where the harder settings help eliminate pitch and roll.
In either mode, PASM continuously evaluates the current conditions while automatically selecting the corresponding damper rates from the respective set of mapped values.
A range of sensors are used to monitor the movement of the body under acceleration, braking and cornering maneuvers, as well as on poor road surfaces. The PASM control unit then evaluates this data and modifies the damping force on each individual wheel in accordance with the selected mode. The result is a significant reduction in body movement as well as a better grip on the road.
For example: if ‘Sport’ mode is selected, the suspension is automatically set to a harder damper rating. If the quality of the track surface falls below a certain threshold, the system immediately changes to a softer rating within the ‘Sport’ setup range. When the quality of the tarmac improves once more, PASM automatically returns to the original, harder rating.
Need more information about PASM? Click this link: FAQ for PASM
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've hesitated to post this, but I have a great deal of fun driving the Cayman at those temps because of the loss of traction. Power slides are easily achieved by just modulating power. Below freezing the car effortlessly brings the tail out and can go around turns in a nice controlled drift.
If you're not comfortable driving sideways, I don't recommend trying this. but if you are comfortable, it can be a great deal of fun. If you don't turn PSM off, it shuts you down real fast. I've also found that if you go to PASM sport mode I get no wheel hop and the car stays very flat and controllable as the tail comes out. But be careful, it all happens much faster in the Cayman than it does in a front engine rear drive car. You need to be very gentle, and if you are the car is very controllable and can acheive a very smooth slightly tail out drift.
Yes, it is alot of fun swinging the tail out at will. Your tail coming out can be a problem when it happens due to an evasive action, or when unexpected due to a sudden change in road conditions (small patch of ice).
If you are going to drive your Cayman regularly in sub 40 degree weather, be smart and buy winter tires.
__________________
FREE SPEECH FOR ALL
2007 Cayman S
2008 Cayenne Turbo
2002 Carrera Cab
1995 993 The track car
1984 944 The former track car
Yea, I am in the Dc area and are still on my summers because I couldn't find a place I trusted to change tires out. It's been interesting. I noticed as soon as it got under 40 but now that it's 20 deg out - it's been fun. The CS is my only car so.... I thought before that all I had to do was stay out of the snow but that's not quite true. Fortunately, I'm going to Arizonna for a couple weeks this weekend so hopefully I 'll miss some snow storms.
__________________
2006 Arctic Silver CS with SRP and LSD
Gator bite - I like your post, I was thinking the same thing but I'm not that good of a driver. I have my eye on the next DE courses to help rectify this
It's fun until the first time you slide too far and do serious damage to your car. Having grown up in Canada, I've got lots of experience driving in snow and ice. My first car when I was in my teens was an MR2, with high performance summer tires. Despite the mid-engined balance, I still remember what a handful it was when the tires exceeded the boundaries of their temperature ratings.
My suggestion would be to keep the car parked on cold days, or get yourself real winter tires. It's a relatively small investment to avoid an accident.
__________________ 2008 Porsche Boxster - X1 Arctic Silver Metallic, V9 Black Top, P77 Leather Sport Seats, 342 Heated Front Seats, AT Black Full Leather, 403 19" Carrera S Wheels, 475 Porsche Active Suspension Management (PASM), 435 Sport Steering Wheel, XSC Porsche Crest in Headrest, 490 Sound Package Plus, 551 Porsche Windstop (Deflector), 584 Storage Box