Had the Go Pro and a GPS data logger on Kenneth Murphy's Sil80 yesterday.
Here is the video of the qualifying runs.

Kenneth Murphy Qualifying :: Drift Fest Masters Round 1 - YouTube

The data also allows a map to be drawing showing the speed at all areas of the track The data and the map are slightly off by a few meters.

http://www.gpsvisualizer.com/display...8.109.150.html