stiff lowered springs for gsr/evo 1,2,3

[90xsi]

my car is currently running 17x7+40 offset and i lowered it with koni shocks and king spring super lows witth lipped guards. my problem is the rear is tucking and im slicing up my tyres REALLY bad!! after something slighly higher then superlows or something stiff!! if someone has something pls pm me cause i cant drive my car atm!! thanks in advance
Phi