Okay, I tested a scion with your setup and these are my official results:
Your gearing is WAY to high for any drift. I could only really manage to do a burnout.
The car wanted to turn and would not go straight to save its life.
Couldn't drift because it was way to sensitive and over reactive.
I changed the settings and its much easier to drift, try this on the sunset track:
tires: front 29, rear 37
Gearing: final: 4.10, 1st: 3.63, 2nd: 2.45, 3rd: 1.66, 4th: 1.25, 5th: 1.01, 6th: .86.
Alignment: Camber: 0.3/0.0, Toe: -0.5/0.7 Caster: 5
Anti-roll: 25.50/21.30
Springs: springs: 769.5/673.0, ride height: 3.4/3.6
Damping: rebound: 8.8/7.9, bump: 8.7/7.8
Aero: rear: 150
Braking: balance: 30%, pressure: 110%
Differential: 80%/80% (you don't want your wheels to unlock when you let off throttle, that will spin you out.)
Hopefully this helps. Happy drifting!