I have been testing and testing and testing my 12r5 with lipo on med bite carpet and have found some success. With the lack of info on LiPo set ups I thought I might get the ball rolling by posting what I have found works for me in 17.5 and 13.5 1 cell. I'd love to hear what anyone else has experienced.

Front

.20 BMI springs(~.18 AE equivalent) only use 2 shims on top of kingpin.
0 reactive castor
2 mm of spacers between upper arm mount and bulkhead (effectively lengthening the upper arm)
both spacers to the back for static castor ~6-7*?
4 mm RH
9650 Servo w/201 Kimbrough Med SS and balls mounted in lowest holes.
Jaco Dbl pinks 42 mm
.60" of spacers on axle behind wheel
2* camber
0* toe

Middle

4 mm RH
3 mm droop spacer in center shock (1 mm shorter than std)
#2 shock mount (1=bottom, 4=top)
30 wt ae oil in center shock
black AE spring in center shock
std length AE ball cup threaded all the way onto shock. Gives 2-3* of droop
blue side springs all the way up.
20 wt side shock oil

Rear

4 mm RH
Jaco Yellows 44 mm
172 mm axle width
centered BL pod

Other

Parma Speed8HD body
SpeedPassion 13.5 w/84 mm rollout with 26* timing in SpeedPassion esc
4.5' circles
Full paragon F and R
SMC 1 cell LiPo
Spektrum Micro Receiver
Novak Booster