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991.2 Carrera S with RAS
P- Zero N1
Vmax - 217kmh
Vmin - 83kmh
LatGmax - 1.38
Peak boost - 17.4 psi
Peak brake pressure - 1227 psi
Gears - 3 and 4
PDK - sport plus/auto
Average velocity - 132kmh (82mph)
Time - 67.13s (fastest lap 66.12s)
Temperature ~ 23 degree C
Conditions - sunny and dry
Track - water before turn 7 affected entry - T1 double apex (R), T2-T3 esses twin transition (LR), T4 (L) uphill to blind crest, transition pre T5, T5 post crest (R) 20m drop, 9.2% gradient to T6 double apex (R), Vmax recorded before T7 single apex (R).
Note 1: data is plotted in the form provided by SC e.g negative lateral g is a consequence of a right hand turn
Note 2: the daily driving circle is .5 left, .5 right, .5 braking.
Note 3: conservative trail braking
You are getting great performance out of those P-Zeros! Just curious: Did you measure G difference between human launch vs computer launch?
I haven't done that test as yet
However, I suspect I would need 10Hz-100Hz telemetry to pick up the subtle differences. The 1Hz SC system installed in both of my cars delivers one reading per second whereas the 10 to 100Hz systems deliver between 10 and 100 readings per second (and thus deliver the fine detail)
Its worth picking up Harrys Lap Timer - on your iphone (1Hz). If you calibrate the phone correctly and mount it mid-screen you can generate pretty good data.
The Porsche precision app is meant to work with 991.2 generation cars but, once again, the limitation is the frequency of data collection. In contrast, the list of variables is impressive
The next step up in telemetry comes with an order of magnitude change in price
Corner entry and exit - turn 6 (981GTS 3.4NA and 991.2S 3.0TT)
You are carrying a lot more speed through the apex in 991.2. 15 KM / 9.3 miles more! Any guess on what 991.2 update is the biggest contributing factor behind this?
Your thought process about PDCC and SPASM is same as mine by the way. Body roll gives a good indication of when tires are about to lose traction. PDCC masks the roll, which might result in overconfidence through a turn that looks like flat...flat...flat...catastrophic loss of traction.
I did feel a tinge of doubt when I saw the new generation development film and the one of the engineers mentioned that PDCC shaves 5 seconds off of Nurburgring time. Ah well!
^^^^^^^
Rear axle steering for sure and E-PTV - like yourself, I like a small amount of roll - I know exactly what the car is doing or more specifically, I can feel the loading across the patches.
The blue circles are data from an anti clockwise circuit - the car at the time was on very tired P Zeros - notice the massive difference in performance level between the new and old (too many heat cycles) tires. I have also added the data field for my preferred "all round" track tires (Yokohama Advan 050).
04-17-2017, 07:15 AM
Telemetry - 991.2 Carrera S
