Nismo 370z wing aero testing

Tuft testing of Nismo 370z rear wing to analyze airflow. Nissan claims 150 lbs. of downforce at 75 mph for the whole car.
Airflow over the top of the rear of the car is not bad overall. There is some stagnation in the center area of the lower glass and deck. This indicates that airflow to approximately the center 1/3 of the wing comes from above the surface, and the wing angle of attack relative to airflow is actually steeper than the angle of the rear glass.
There is a bit of spillage expectedly on the sides, causing air to flow around and under the sides of the wing. About 12" of each end of the wing seem to not be very effective and not contributing much to downforce, designed more for aesthetics.
The center support is rather blunt on both ends and causes slight disruption to the airflow, further reducing the effectiveness of the wing.
The wing base (or deck lid extension) has smooth airflow over it, but the air quickly curls downward off the rear to fill the "void" created behind the car. Vents from the underbody or a good diffuser could improve this, helping the overall efficiency of the wing.
Finally, airflow over the wing itself is not bad. The tufts indicate smooth attached flow, upper and lower surface trailing edges allowing air to rejoin smoothly. There is some turbulence behind the Gurney lip on the upper trailing edge, as evidence by the top tufts waving but the lower tufts staying straight.

[@Clint_Moto34]

Thank you. I have the 2017 Nismo Model and want to drive Time Attack with it. I think about changing the Oem Spoiler to the nismo wing from Seibon Carbon.

[@jimwolf2318]

Kills this Spoiler more Acceleration than the others? Nismo v2 wing*