Hate to tell you this, but the car doesn't like to turn. It's too heavy. But, these tweaks might help. With them I ran a very easy 4'41.381 on the "Complex String."
Spring rate: 17.0 kg-front/18.0 kg-rear (comping for the weight)
Ride Height: Slammed!
Shock Bound: 2/2
" Rebound: 8/8
Camber: 6.0-F/5.0-R
Toe: 0.0 F/R
Stabilizers: 2/2
Brake Bal.: 12-F/11-R
L.S. Ini. Torque: 10/10
Accel.: 10-F/30-R
Decel.: 20/20
Gear: Auto Set. #34
ASM: 5
TCS: 5
VCD: 40%
You're driving style will most likely vary, but these stats should be a good place for you to start you're own tuning.