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. On the 720S Evo, I recommend not touching.

TC: - I recommend the TC3
       - TC1 for hairpins
       - TC Off for Raidillon

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 near to -0,24 maximum if you want more turning OR increase near to -0.15 if you want more stable (it depends on the feeling of player)
- Rear Toe: don't touch
- Front Antiroll Bar: don't touch
- Front WheelRate: decrease 1 click if you want more turning OR don't touch
- Rear Ride Height: increase 1-2 click if you want more turning (but tricky) OR decrease 1 click if you want more stable OR don't touch
- Rear Wing: You'll have to learn to drive like that at Spa, because it's faster even in S2 with one wing than with three... Yes, yes, I know, it's strange. Take your time to get used to going over Raidillon, it sometimes takes several passes before you get the hang of it. Maybe increase 1 click if you want to be more safe.

Race adjustement (advice): Adjust based on race duration. For 15 minutes, you can keep the qualifying setup. For endurance with a 1h/1h10 stint, opt for a slower setting for pure performance but consistent over the duration of the stint.
- Front Target psi tyres at the end of the lap 27,2-27,3
- Rear Target psi tyres at the end of the lap 27,2-27,3
- Front Toe: decrease near to -0,24 maximum if you want more turning OR increase near to -0.15 if you want more stable (it depends on the feeling of player)
- Rear Toe: don't touch
- Front Antiroll Bar: don't touch
- Front WheelRate: decrease 1 click if you want more turning OR don't touch
- Rear Ride Height: increase 1-2 click if you want more turning (but tricky) OR decrease 1 click if you want more stable OR don't touch
- Rear Wing: You'll have to learn to drive like that at Spa, because it's faster even in S2 with one wing than with three... Yes, yes, I know, it's strange. Take your time to get used to going over Raidillon, it sometimes takes several passes before you get the hang of it. Maybe increase 1 click if you want to be more safe.
- Front Brake Ducts: it depends on the temperature
- Rear Brake Ducts: it depends on the temperature

My best lap with this setup: 2:15.640 (on a mega lap, there is the possibility of doing 15.4 low, so you can improve so much my time)

Good Luck and Have Fun.

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