Try to edit Java files - Tires physics. Download this file, and put it to: (Your Slrr version)\parts\scripts\rgearpart\reciprocatingrgearpart\SRC
Link
And don't forget to do backup's of reciprocatingrgearpart directory.
For Example:
if (RT == tcSUPERSPORT, or TcSport, or tcDRAGRADIAL, depends what tires you use in game for drifting) // supersport tyre //
{
rubber_rigidity = 0.750;
load_mul = 0.800load_mul2;
min_rollres = 0.004roll_res_mul; // tyre: depends on contact patch
friction = default_fric/rubber_rigidity; // tyre: static friction (compound efficiency)
sliction = 0.760slic_mul; // tyre: slip ratio (slictionfriction = slipfriction)
frictn_x = 3.000; // tyre: longitudinal friction and sliction * ratio = horizontal friction and sliction
loadsmooth = 0.250;
compound_label = " soft compound racing tyre";
police_check_fine_value = 50.0;
} else
tcSUPERSPORT - Class of your Tires.
rubber_rigidity = 0.750; Very usefull. the smaller the value, the higher the contact.
you also can edit friction and sliction.
p.s. rubber_rigidity = 0.050; for drag tires makes you car go 5 seconds on VTECK.
good luck to your experiments.