Nissan R390 GT 1 - My settings

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Ok here are my settings , i made them and i think they're aren't bad but i would like to get some advice this is my first tuning setting so please for some advices
i think i made something wrong with brakes so please help

Car - Nissan R390 GT 1
Power- 939 PS

Exhaust - Racing
Computer system - None
NA Tune-up - None
Tires - Racing Medium
Nitrous - NOS - 60
Turbine kit - Stage3
Intercooler - None
Supercharger kit - None
Brakes- Normal
Brake Balance Controller - Brake Controller
Front - 5 Rear - 5

Suspension - Racing
Front Rear
Springrate - 12.3 13.2
Ride High - 64 70
Damper - = =
Damper(bounceside) 8 8
Damper(reboundside) 7 7
Camber angle - 2.8 1.9
Toe angle - 1 1
Stabiliser - 4 4

Transmission - Fully customized

1st - 3.909
2nd- 2.624
3rd- 1.864
4th- 1.393
5th- 1.099
6th- 0.914
Final- 3.109

Clutch- Standard
Flywheel- Standard
Propeller shaft - None
Driving aids - (i dont know how to make it good ;P )
ASM (oversteer) - 10
ASM (understeer) - 10
TCS - 7

DownForce- Front - 53 Rear - 67

LSD - Fully Customized
Front Rear
Inital Torque = 15
LSD Acceleration = 50
LSD Deceleration = 25

AYC Controller - Nonce
Variable Centre Difference Controller - Standard

Weight Balance :
Balance weight - 5
Front /Rear Balance - 13

Enjoy