[kach22i]

Porsche DP 935 Long Windshield One of Just Four Produced
https://rennlist.com/how-tos/slideshows/porsche-dp-935-long-windshield-one-of-just-four-produced-591233#rare-beautiful-sinister







https://www.mecum.com/lots/CA0819-381105/1989-porsche-dp-935-long-windshield/

The outrageous bodywork is further enhanced by the long windshield, designed to achieve the optimal intersection point of low wind resistance combined with aerodynamic downforce..........................

The black interior is fitted with competition Lollipop bucket seats, a leather-wrapped steering wheel and the dashboard-mounted “dial of death”—a knurled knob enabling on-demand boost control of the turbochargers. .............

Any information out there on the aerodynamic testing and then sourcing of this long windshield?

It's probably buried in a book somewhere - or in one of your heads.