For high grip carpet try M-grips in front with full size (26mm) HPI blue or black sedan inserts. Cut about 3/8 inch out of the insert and glue the ends together with rubber cement or shoe goo. In back use S-grips with a Tamiya narrow 24mm black or blue insert cut down like the front insert (even 60D foam works pretty well). Try hard blue short springs up front (the newish sedan ones, not the older bright blue ones) and either red or yellow springs on the back. Think low. Very low. That should get you started.

Later
Doc