Ok, heres a pretty competitive tune for an ek9 in terms of my driving style, for others this may be a complete waste but feel free to give it a try.
CONVERSION - centrifugal supercharger and convert to rwd
AERO - forza front bumper, forza wing, chargespeed rear bumper, c-west skirts
TYRES - full race compound, BBS RE's although you can choose whatever you like at the end of the tune so long as it stays within the PI.
DRIVETRAIN - race transmission, race diff
HANDLING - race brakes, suspension, and both roll bars, full weight reduction
ENGINE - race supercharger
Now onto the tuning
TYRES - 27.5 / 27.5
GEARING - 3.70 final drive 3.95 / 2.75 / 2.13 / 1.66 / 1.39 / 1.18
ALIGNMENT - camber -1.0 / -1.2 toe 0.2 / -0.3 caster 5.7
ROLL BARS - 27.82 / 27.41
SPRiNGS - 700.8 / 635.4 and lower the fully
DAMPING - rebound 7.8 / 7.5 bump 3.8 / 3.5
AERO - full cornering front and rear
BRAKE - 51% / 165%
DIFF - 40% / 40%