Here is a vid from a member of a different forum I go to who went in a Hot Lap in an F1 GTR. Pretty cool noise, wish the driver went harder but cool nonetheless.
http://web.ics.purdue.edu/~mfeldhak/hpc_dio_productions_-_mclaren_f1_gtr.mp4
http://web.ics.purdue.edu/~mfeldhak/hpc_dio_productions_-_mclaren_f1_gtr.mp4