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 TC3 to be safe.
      - TC2 if you are good on the M4
      - TC1 or Off if you master the M4

HotLap/Qualifying lap adjustement:
- Front Target psi tyres at the end of the lap 27,0-27,1 
- Rear Target psi tyres at the end of the lap 27,0-27,1
- Front Toe: decrease 2 clicks if you want more turning OR increase 1-2 click if you want more stable but understeer appears (it depends on the feeling of player)
- Rear Toe: don't touch
- Front Antiroll Bar: increase 1 click if you want more stable
- Rear Ride Height: increase 1-2 clicks if you want more turning OR decrease 1 click if you want more stable OR don't touch

Race adjustement (advice):
- Front Target psi tyres at the end of the lap 27,0-27,1 
- Rear Target psi tyres at the end of the lap 27,0-27,1
- Front Toe: decrease 2 clicks if you want more turning OR increase 1-2 click if you want more stable but understeer appears (it depends on the feeling of player)
- Rear Toe: don't touch
- Front Antiroll Bar: increase 1 click if you want more stable
- Rear Ride Height: increase 1-2 clicks if you want more turning OR decrease 1 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: 1:43.027 (on a mega lap, there is the possibility of doing 42.9 low, so you can improve so much my time)

Good Luck and Have Fun.

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