Stiffer lf or right rear spring in slick

[hot rock]

Car is great while track has moisture but gets loose in slick on entry and in center of corner seems like it dosent pin the rr tire like it does when track has some moisture . what would be the most effective spring change between stiffing left front or right rear

[MasterSbilt_Racer]

There is no one size-fits-all answer here. If the car has stopped rolling, a stiffer rr will make matters worse. If you use little braking or slow down very little on entry (momentum track), a stiffer lf spring will do little for you.