I tend to lower the steering ratio because I like to have a more responsive GT3 when I turn my wheel while putting very little angle.
Don't hesitate to raise the steering ratio by 1-2 clicks if you are used to playing with more steering ratio.

TC: - I recommend the TC6.
      - TC5 for T13 and T14

HotLap/Qualifying lap adjustement:
- Target psi tyres 27,0-27,1
- Rear Toe: decrease 1-2 clicks if you want more turning OR don't touch
- Front Antiroll Bar: increase 1 click if you want more stable
- Rear Antiroll Bar: increase 1 click if you want more turning 
- Rear Ride Height: increase 1 click if you want more turning

Race adjustement (advice):
- Target psi tyres between 27,2-27,3
- Rear Toe: don't touch
- Front Antiroll Bar: increase 1 click if you want more stable
- Rear Antiroll Bar: increase 1 click if you want more turning OR decrease 1 click if you want more stable
- Rear Ride Height: decrease 1-2 click if you want more stable OR don't touch
- Front Brake Ducts: it depends on the temperature
- Rear Brake Ducts: it depends on the temperature

My best lap with this setup: 1:31.100 (on a mega lap, there is the possibility of doing 30.9 high, so you can improve so much my time)

Good Luck and Have Fun.

YouTube: https://www.youtube.com/@kelicful3729

TikTok: https://www.tiktok.com/@kelicful

X: https://x.com/kelicful