With the splitter compete, it was on to the back of the car to install a wing to match the newfound front downforce. When picking a rear wing, you need to know roughly how much front downforce you are balancing against and the weight distribution of the car. The aero balance should match the weight distribution of the car fairly closely. I tend to prefer my aero balance shifted slightly rearwards because high-speed aero oversteer is a little scary! As we all know, a Miata’s weight distribution is roughly 50%/50%, which means our aero balance should closely match. Based on previous experience, we know that our splitter is in the neighborhood of 200 pounds of downforce at 100mph and we went straight to APR Performance to find a wing that matched.
APR provides all of their wings’ data, which makes finding the right wing for the job fairly easy. After discussing a few options with APR, we found a bolt-on option for their GTC-200 wing to a Miata. Mounting was easy, as they provide all the instructions and templates. We installed their added risers and gurney flap to maximize free air performance and add just a touch more downforce to ensure we had a rearward bias.
With our simple aero in place, it was time to hit the track!