first of all, thank you for sharing.
second, i think the setup you uploaded is a little buggy. for example:
[TOE_OUT_LF]
VALUE=30
and
[TOE_OUT_RF]
VALUE=3
i believe toe_out_rf should be 30 too.
now back to my feedback:
completly undriveable.
you have break bias 57. this makes breaking impossible. powerdrift each time when breaking.
you have rear wing to 6. getting on gas after a turn or on curbs is sudden death.
nonetheless, setting rear wing to 8 and break bias to 64 (default) the car handles much better. i managed a 1.42.9 with the modified, easier to drive version. i could be faster if i wouldnt have so serious problems with my G27. i dont know why but catching the car with the g27 sucks big time.