I have a 12RR and I am setting it up for a small indoor track that is smooth cement with some type of black sealer. The problem is that I have a horrendous under steer. This is a new track and we haven't raced the 1/12th scales yet. During practice every car I've observed with foam tires has pushed. While the rubber shod touring cars have immense traction to the point where some are traction rolling.
I started with the set-up straight from the 12RR's instruction manual and have progressed slightly, but I still feel the car handles very poorly. Basically I'm trying to drive fast without hitting the outside walls as opposed to driving fast without spinning. I am currently set up as:
FRONT - Jaco Magenta full sauced; 4 mm ride height; 1.5 mm camber; 10 degree caster blocks; 1 shim on either side of caster block; 0 deg toe; .20 linear spring w/1 shim preload; no oil on kingpins.
REAR - Jaco Double pink 3/4 sauced; 4 mm ride height; gold spring; 40 wt oil; 1 mm droop; thin flex bars w/o tweak screws; batteries full rear; diff as loose as possible w/o slipping.
Protoform speed 12; 13.5 brushless w/ 65 mm roll out; 100% steering dual rate; Paragon or Jack the Gripper.
Everything I've read says my car should be impossible to drive due to over steer. But I have the opposite problem, the car is almost okay for the first minute and gets worse from there. The huge push on power is almost as bad as the push off of power. It is so bad that I "knew" something was wrong in the way I built the car. So I have rebuilt, and checked for slop or binding in the front and rear suspensions and everything seems correct.
Any suggestions would be greatly appreciated.