We prefer a solid spool in the front instead of a oneway for short tracks, it' just suits me kids driving style better.
Maybe try 1/8 turn out front diff and1/2 to 5/8 out on the rear, also use less or more droop in the car for the push, I guess you have the slipper spring in the steering rack or do have it locked solid?? If all else fails set the car up at dead 0 caster/ camber and droop and start over.
I use 2 degrees camber 9 degrees caster 1 degree rear toe 0 toe in front 50 wt shock oils all the way round and #3 pistions, blade bar at 0 to 45 degrees on front 40 shore front and rear tires and purple springs front and rear,2 degrees droop front and 0 droop rear, and the car is on a rail!!! No push or nothing just good speed!!!!! Not trying to push foams, but if you guys have tire issues, or want to try the best tire for the $$ out there you need to switch to GQ racing foams. BEST FOAM TIRE ON THE MARKET!!!!! And the pricing is well with in reason!!!!! BB