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Still trying to collect my thoughts right now because I'm beat from 2 days of hard driving in the Cayman.
Great to see the number of active Zone 1 Club members driving at this event! They included:
Cayman_Ken & his daughter in an Audi A4
diverdog
me!
doc_oct
Chris (owner of a beautiful Design Edition 1)
Retired_Teach came out on Saturday to watch and support us for a bit, can't wait to have him back on the track again soon!
Burned almost 2 tanks of gas and turned my exhaust tip into a new color (piss yellow?). The car exhaust also sounds different now, can't quite put my finger on it, it's just louder in a good sort of way.
The car is amazing and really comes to life on a track. I ran with PASM on and sport chrono off (I didn't want a jumpy throttle)
We ran two different track configurations. The first day we did the double infield and used the two NASCAR straights. Sunday AM we did two runs of the NASCAR "bowl" to test our top speeds and went back to the double infield in the afternoon.
The afternoon session was held in a driving rainstorm. My wipers on high were barely keeping the water off. But, at 90 MPH plus, water doesn't come in the side windows! Saw a 997 do a nice slow spin ahead ahead of me when they overcooked a corner. Too sharp a correction and the back end came right around.
The bowl was scary, Pocono turn 1 is banked 14 degrees and links the front and back straights. In the dry I managed to max at 135 plus, in the wet, I didn't bother looking. The Bridgestones are great tires in wet and dry. Unfortunately I think they're on their last legs at 4400 miles on 2 track days, autoX and a car control clinic.
I have these same tires on the G35 and they look OK at 10K miles also with autoX and 2 days at Watkins Glen. Oh well.
The good thing about running in the heavy rain on Sunday was that it saved some of the treadlife.
The AWE pedals did what I wanted, heel-toe all weekend with only 1 incident of tire chirping going from 3rd to 2nd.
We had some serious hardware in my group including 996 GT3, 997 GT3 and 997 Turbos. I got some very nice views of their bumper badges before they all pointed me by for some reason.
Chris in the DE1 was an amazingly fast driver. He was probably the fastest driver in our beginner group. We never saw each other the first day, but he did run up on me on the 2nd day. After giving him the pass, I never saw him again! Had a 997 hold me up for a bit, but after finally getting around him, Chris was a speck in the distance.
The best part of the weekend? No incidents and a sign-off for some solo time Sunday afternoon.
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
Sport Chrono and Chrono Plus
This optional package is a valuable addition for trackday use. Available in conjunction with the CDR-24 CD radio, it includes a swivel-mounted analog and digital timer unit which is centrally located on the dashboard. All functions are easily accessible via the control stalk for the on-board computer. Analog dials measure hours, minutes and seconds, while a separate digital field displays whole seconds, tenths and one hundredths of a second. A second digital display runs in parallel in the instrument cluster. Click this Link to visit the FAQ entry for Sport Chrono.
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Pete
2008 Meteor Grey CS, PASM, Chrono, Sport Seats, Sport Shifter, Sport steering wheel, Xenon, Fire Extinguisher, Auto Climate and clear bra!
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It was a great weekend. We lucked out with dry weather sat & sun morning. Caymans where well represented in the lower run groups (green & yellow) but I didn't notice any in the upper groups. The car is a joy to drive and very competitive with the 911-996-997-turbo, 914 & 968 in my class. I usually started in the first 1/3 of my group and no one passed me during the entire event. And yes I was looking in my mirrors lol.
The bowl was interesting but not quite the pucker test I thought it would be. My first run on it was dry and I gradually worked up my entry speed to ~110 & my best speed at the end of the straight was ~144
The rain was fun too. Started very slow & gradually worked up to a good clip. I could feel the rear end starting to slide & could rotate the car nicely with the throttle.
The most interesting run was the last one. They combined our group (yellow) with the black group (2nd highest). They let the black group on first & the us 10-15 sec later. I was 4 th in line in our group & really wanted to get close to the black guys to observe their line & see if I could stay with any of them. I got by the 3 yellow cars on the first lap (2 Carrerra S & a 911). Much to my suprise I caught and passed 3 of the black group cars! I lapped several cars and just before we got the checker I saw a white gt3 cup car behind me looking to pass.
He came over to chat after we pulled in and let me know that I help him up for 1/2 a lap. He was a little pissed. I apologised and let him know that I would be sure to check mirrors more often. Then he paid me a compliment saying that I was really fast considering I was driving on street tires. He was also supprised on how fast the car was on the straights.
All in all a really great weekend. Fantastic friends, great instruction & safe fun!
Don't forget to check out our picture thread courtesy of Blackhawk!
Good driving DiverDog! Sorry, but I was not able to floor it 100% after the apex of the bowl while looking right at the wall. Yeah, yeah, the turn will track out perfectly but concrete and Cayman are not a good mix. Next time, right?
I took it easy on the afternoon runs. I wanted to enjoy every minute of my first solo time on a track!
I'm curious why Pocono doesn't have those fancy energy absorbing crash walls at other NASCAR tracks. NOTE: I've never watched a NASCAR race and only know this as a rumor...
Can everyone post what their tires pressures were on the stock 18" rims?
I started at 31F/37R and ended with 37F/41R at the end of each session. The tire shoulders looked OK so I figured I wasn't rolling over on them.
Coming out of the infield onto the NASCAR sections (tight turn, wheel cranked hard right) in 2nd gear I noticed a thumping sound as if my rear tires were slipping, is this the infamous lack of an LSD issue?
Check out the video of our event that a 944 driver posted!
When running the "bowl", we stay on the NASCAR portion at the end of Long Pond Straight and enter Turn 1 then shoot back out the front straight. We skip the south infield portion.
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
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Pete
2008 Meteor Grey CS, PASM, Chrono, Sport Seats, Sport Shifter, Sport steering wheel, Xenon, Fire Extinguisher, Auto Climate and clear bra!
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Last edited by PistolPete13; 07-02-2008 at 02:46 AM.
Tires 31/32 cold 37/38 hot. I felt the same "thumping" in that 2nd gear entry to the straight. For me it was PSM doing it's thing. Made the rear end twitchy. Only time its happened to me so far. I think LSD would allow more throttle there & rotate the car better. Got rid of it with a smoother throttle application.
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
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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2004 Anniversary Ed. Boxster S - GT Silver/Cocoa
1988 944S - upgraded sport suspension, fire extinguisher
Editor, Metro NY Region Porsche Club MetroNY Enthusiast of the Year 2007
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