The Genius Aerodynamics Of The Subaru Impreza STI Hatchback

Do NOT spoiler-delete your Impreza hatch until you see this. I ran CFD on a 2013 Subaru Impreza hatchback to test three setups: stock, air curtains open vs closed, and spoiler removed—at 45 mph and 155 mph. At 45 mph, drag barely changes. At 155 mph, the story changes completely: the rear spoiler and air-curtain setup can flip the car’s aero behavior from planted to lift. Key questions: Do the front air curtains meaningfully reduce drag at speed? Does the rear spoiler act as a functional separation control device on a hatch? Why can a spoiler delete increase high-speed lift even if Cd barely changes? ▶ Learn CFD & Aerodynamics OpenFOAM CFD Course: 👉 https://premieraerodynamics.com/Courses/ Automotive Aerodynamics Course: 👉 https://premieraerodynamics.com/Autom... RC Aircraft Design & Aerodynamics: 👉 https://premieraerodynamics.com/RC-Ai... Commissioned CFD Simulations (your car / race car): 👉 https://premieraerodynamics.com/Simul... Chapters 00:00 The spoiler-delete myth 00:30 Spoiler removed 04:00 Air curtains test (open vs closed) 06:00 Baseline: stock aero This video uses computational fluid dynamics (CFD) to analyze automotive aerodynamics, including velocity planes, pressure fields, dynamic pressure, streamlines, and drag production orbits. Topics include drag coefficient, wake structure, diffuser design, wheel aerodynamics, pressure recovery, lift and downforce, and rear separation in road cars and supercars. Simulation details: MRFs are used for wheel rotation simulation. Note that these results are for entertainment and not for research purposes. #subaru #subaruimpreza #subaruimprezasti #subaruaerodynamics #subaruwrx #subaruwrximpreza #subaruwrxsti #CFD #Aerodynamics #VehicleAerodynamics #DragCoefficient