For the 2010 Asphalt Nats at NorCal Hobbies, using the old Gen-X 10 chassis I ran...
FRONT
Jaco WGT Spec tires (ran down to 52mm±)
Red springs (with no pre-load)
Caster, 1 shim forward/2 back
10º active caster
1-1/2º camber
0º toe
in-line steering
inner hole on steering arms
MIDDLE
1S Battery (approx. 1/2" behind servo)
ESC behind battery on CRC shelf part
Servo pack on left side (to transfer weight from side-to-side)
Receiver on right side
Top deck mostly dremeled away to look like an "X" above 1S battery (similar to LE)
Front shock/antenna mount replaced by a simple ball stud
REAR
Jaco WGT Spec tires (ran down to 52mm±)
Red side springs (with 1/2 turn pre-load)
30wt oil in the Losi shock, Associated blue spring
1mm droop
8,000 wt in damper tubes
Long side links
Thicker 4mm top deck for rear pod
4mm ride height all round (smooth track)
Protoform Sophia body (on wide rear body mounts)
935 grams race ready (ROAR limit is 930 for WGT)
Otherwise, for tracks with less traction, I had to run softer rear tires to have enough rear grip.
Bill