Oh Willow, you've become the Tsukuba of GT6. How tired I am of this track. Not because of anything bad, I'm just rubbish on it. In any case I managed GOLD and here is the tune I used.
Suspension
RH F 50 / R 60
Springs F 13.34 / R 9.15
Dampers(C) F 5 / R 8
Dampers (E) F 4 / R 5
ARBs F 5 / R 4
Camber F 1.0 / R 0.9
Toe F 0.00 / R 0.15
Brakes F 7 / R 3
Transmission
Final - 3.692
Top Speed - 168
1st - 3.602
2nd - 2.486
3rd - 1.842
4th - 1.429
5th - 1.160
6th - 0.987
LSD
6 / 11 / 20
Stg 3 Engine Tuning
Low RPM Turbo
Semi Racing Exhaust
Power Turned down to 77.4%
Stg 3 weight redux
Downforce @ Max
200 / 500