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Just for clarity, when you stop the brake and then the gas, does it actually say Launch Control Activated? Or does that not happen and the behavior is still the same, that the revs go up a bit while your sitting still.
This is from the manual:
tick vehicles with PDK
tick engine at operating temperature
tick SPORTS PLUS mode activated
1. Press the brake with your left foot
2. Quickly press down the accelerator as far as it goes and hold it down. The engine speed will level off approx. 6000 rpm. A message indicating that LAUNCH CONTROLis active appears on the multi-function display.
3. Release the brake within a few seconds
There is a lot more going on than meets the eye - there is interplay between the engine management system SC - PDK - PSM - E-PTV (and indeed the active engine mounts and changes to RAS - PDCC settings).
The difference in meters between a LC equipped car and non LC equipped car is about 5m to 8m on a pull to 60mph
Originally Posted by M Fig
Is there a way to time the 0 to 60 speed with the cars electronics or do you need a special device?
If you have Sports Chrono - you can download the data via the USB port - its good to .1s increments (it logs all sorts of info from steering angle to lateral Gs)
If you have Sports Chrono - you can download the data via the USB port - its good to .1s increments (it logs all sorts of info from steering angle to lateral Gs)
...
If you have Sports Chrono - you can download the data via the USB port - its good to .1s increments (it logs all sorts of info from steering angle to lateral Gs)
Originally Posted by 9914s
.2 only correct?
I've downloaded and analyzed this data on both my prior 997.2 and my current 991.1 after autocrossing just for grins. On those cars it is only captured at one second intervals, I don't know about the 991.2's update rate. Although there is no time tag on my car, I can tell it is one second since the number of rows captured where the car is working hard (I've deleted the sitting-still rows) matches up with the length of the autocross run.
Here's an example after I loaded the data into Excel and applied some conversions to make it more readable. I think I may have removed a couple of columns that I wasn't interested in... I didn't keep the raw data.