You might want to try and move some of the weight to the rear of the car, so the angle of attack is increased, exposing more of the lifting surface to the relative airflow, thus improving the amount of lift generated by the wing.
You might want to try and move some of the weight to the rear of the car, so the angle of attack is increased, exposing more of the lifting surface to the relative airflow, thus improving the amount of lift generated by the wing.