Impreza Rear Diffuser Tuft Testing Airflow v2

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This is the airflow result after the modification to our rear diffuser and underfloor. We have added two venturi tunnels that lead into the upper deck of the diffuser, and streamlined the flow into the lower diffuser. I have since finished the centre part of the upper deck, adding two converging walls that continue the venturi tunnels into a sharp leading edge at the exit. Also added two additional strakes on the underside of the lower deck that follow the venturi tunnel walls.
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This setup is currently being replaced, so watch this space for future developments.

Full road tuft testing will be completed once the setup is ready.

undersideperformance
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It would be great to get some on road shots at 40mph and up

justinfabricius