This is the on-board video I used to try to somewhat match the gearing:
0:52.797 is my best lap so far. I'm
not having an easy time getting this car to go fast or feel great to me.
I have to brake early & accelerate late for every turn.
I know setups are highly dependent on individual preferences & driving styles, so it won't hurt my feelings if you hate this one. I'm not saying anything about this tune is "objectively good." I'm not saying any of these settings "make sense" according to any real-world mechanical principles. I'm only saying, out of what I've tried so far (and I haven't tried everything), and given the parameters you set (HP, weight, & tires), these are the settings that felt better to me on this track than other settings I tried, and these are the settings that resulted in my fastest laps. Your mileage may vary. Maybe there are pieces of this you can use; maybe not.
power level: 2
weight reduction level: 1
power %: 136 (270 HP)
weight %: 96 (2,284 lbs.)
traction control: 0
tires: SS
brake balance: -5F
ride height in. F/R: 4.02/4.72
natural frequency Hz F/R: 2.20/1.50
anti-roll bars F/R: 6/10
damping compression % F/R: 58/67
damping rebound % F/R: 88/88
camber F/R: 2.0/1.0
toe F/R: 0/0
diff. initial/accel/braking: 5/25/5
transmission: custom
top speed (auto set) MPH: 112 (set this 1st, after selecting custom gearbox from default manual)
final gear: 3.775 (set this after setting top-speed auto-set)
(Edit/note: I never shift below 3rd gear with this setup at this track.)
It'll take more time and/or a better tuner than me and/or a faster driver than me to pull a 51.x out of this car at this track.