the diffuser section above (Sebring '00) with below (Sears
Point '00). The
Sears Point diffuser is smaller than maximum width (1000 mm).
Point diffuser. Note that the diffuser's walls have
in towards the car centerline, the walls being in the same place as the
strakes in the Sebring diffuser. The Sears Point diffuser
have any strakes in the section. The narrowed diffuser is now
effected by the negative interaction with the rear wheels therefore
actually more downforce even with reduced exit area.
bottom edge of the longtail sections is very sharp (yellow
highlights). One could possibly surmise that a vortex sheds off the sharp edge helping to enhance rear downforce.