If your running on lower grip or your tires are on the harder side like the Gravity tires we used at MHIC try more droop. 2.5 - 3mm in the front and 3-3.5mm in the back over ride height. We found harder tires like these need more droop for the car to be fast.
If you start traction rolling back out droop until it stops but go no less than 1mm in the front and 1.5 in the back. Start making other changes like softening the suspension.