Optimal design gave a lift coefficient of -0.9 from the under-tray. Simulations
showed that when the exhaust was vented into two diffuser tunnels under the car, the downforce
was increased by 35%. Half-scale modelling using the wind tunnel rolling road facility
gave a lift coefficient of -2.4. In its optimal configuration, the aerodynamic load on the front
and rear wheels respectively was able to be adjusted between 43% on the front and 57% on
the rear to 33% on the front and 67 % on the rear by changing the angle of the foils. The
drag coefficient also varied from 0.9 to 1.1.