Originally Posted by Kelmark
My guess for drag coefficient .35 looking at other Ferrari's in 1986. Does that sound about right? Still not sure on frontal area 1.82m^2? I am guessing at this point.
Seems like a reasonable guessing point.
Maybe add ~10% to the final combined CdA number just to be conservative.
but that should be good to get started on calculations and such ... you can always roll up your sleeves to get more specific if you want to later.
one basic / easy method to get a basic idea of the frontal / displacement area is to take a string or something and wrap it around the car ... find the largest part ... that is the circumference ... divide my pi... ~3.14 to get diameter ... diameter times diameter times ~0.7854 will give you a ball park frontal area.
( String / 3.14 )^2*0.7854
usually best to avoid protrusions like side mirrors and antenna.
That is an easy way to get in the ball park of your frontal area.