1971 Porsche 917 K

 
Downforce:
293 lbs. @ 150 mph, with 399 lbs. of drag
422 lbs. @ 180 mph, with 576 lbs. of drag
521 lbs. @ 200 mph, with 710 lbs. of drag

Lift-to-drag ratio: .73:1
Coefficient of drag: .417
Coefficient of lift: -.306
Reference area: 1.546 meters square

Reference: Paul Frere's The Racing Porsches

ęCopyright 2004, Michael J. Fuller