Here is my setup, I used this in a heavy rain grand prix weekend with a Ferrari. I found it to be quicker than Bram's, particularly through the second sector.
Aerodynamics
Front Wing Angle: 7
Rear Wing Angle: 6
Braking
Balance: F 47% - R 53%
Pressure: Medium
Brake Size: Standard
Balance
Ballast Distribution: F 40% - R 60%
Front Anti-roll Bar: 7
Rear Anti-roll Bar: 5
Suspension
Front Ride Height: 4
Rear Ride Height: 4
Front Spring Stiffness: 2
Rear Spring Stiffness: 2
Gearbox
Gear 1: 142 kph / xxx mph
Gear 2: 177 kph / xxx mph
Gear 3: 211 kph / xxx mph
Gear 4: 244 kph / xxx mph
Gear 5: 283 kph / xxx mph
Gear 6: 319 kph / xxx mph
Gear 7: 362 kph / xxx mph
Engine
Throttle map: Cruise
Fuel: Fixed amount
Alignment
Camber front: -0.90
Camber rear: -3.00
Toe front: 0.11
Toe rear: 0.35
Maybe your setup is for the light rain TT and that is the difference (maybe all setups imply TT, I don't know!).
thanks mate i got a 154.048 in heavy rain with lotus in career and no assits in legend(BRILLIANT)