I have a GT2 but this is my setup:
Sensitivity (SEn): 720
Force feedback strength (FF): 70 /in-game 5/
Drift mode (dri): 2
ABS: 40
Linearity (Lin): 0
Deadzone (dEA): 10
Spring (SPr): 0
Damper (dPr): 0
Would how the gt2 has a belt drive and how mine has a gear drive not make a major difference? Thanks for the setup i'l try it when my dad stops playing fifa