This panel makes our car a complete flat bottom. It complements the OEM panels and covers where the factory left open. A lot of care went into the design of the undercar aero with the Verus Engineering kit. The flat bottom panels has vent holes for the headers and CV joints.
These parts are the 3 pieces of the rear diffuser which are made of dry carbon. The two other pieces on the lower right are the plastic vortex generator strakes. These are made of plastic to be able to take hitting the ground. The two pieces on the left are the dry carbon front canards. Since the splitter is on the short side, these are used to give the car aero balance in the front.
You can see that the carbon of the rear diffuser is fairly substantial to take aero loads.
We got these Composite Concepts GT4 style side scoops that fit the 987. We made the cars side openings functional. We converted the drivers side airbox to be open to the scoop so now its a cold ram air box with the scoop forcing more air into the intake. On the Grand Am cars, a similar setup was good for 7 hp at 100 mph. On the passenger side the scoop now forces more cold air into the engine bay. Since the flat bottom panel makes the engine bay less open to air circulation, we figured that having cold air circulated into the engine compartment couldn’t hurt.
One of the great things about the Verus Engineering system was that the design was optimized through many iterations of CFD or Computational Fluid Dynamics, an analytical design tool using computer simulation. First the base car is digitized and then parts are added and the effects studied. The Verus system went through many iterations on the computer before any physical parts were made and tested. In this rendering surface pressure distribution has the flow patterns superimposed over it.