There seems to be a problem with the 997TT data at the point of 26 seconds. There is a clear hickup with the long Gs and altitude (dropping) at the same time, as well as a speed dip, typical of a signal problem or datalogger movement. Not saying this is what happened, but a close up would make it clearer.

CGT, you can fix the long G scale from -0.4 to +1 for example on all your graphs, that would make all these charts less painful to read.

Also showing the altitude scale would be meaningful to any of the posted data. The slopes on the Corvette and the TT are not the same, different roads.

The 250-300kph time is close to the RUF 550 time, which is quite unlikely, but then again, reading the data is almost impossible here.