In reply to TravisTheHuman :
For starters, what calculator or equations are being used to determine theoretical top speed? Is the horsepower being used the the physical force (at the wheels) required to overcome the weight and aero forces, or is it also accounting for assumed inefficiencies for engine power?
Also, I am not finding officially published drag coefficient numbers for any C8, let alone for the ZR1. The CdA on the first page appears to be for the C7 Corvette, and the pre-adjustment Cd at that. Chevy later bumped the official number to .34, not including the extra downforce aero package(s). Apparently the full downforce setup took 8mph off the Z06 and 10mph off the ZR1.
With a .34 Cd x 2.023m^2 frontal area, the C7 top speed was claimed at 194mph for the Z06 (3524lbs) and 212mph for the ZR1 (3560 lbs). What is the power required for each of those?
With full aero that apparently dropped to 186mph and 202mph respectively. Assuming the same area, what is the drag coefficient required for that?
Now the C8 apparently has a slightly higher frontal area at 2.075m^2, and the ZR1 should add a little to that, so may be 2.08M^2. Assuming an equivalent percentage theoretical vs actual hp difference as for the C7 Z06/ZR1 above, what's the drag coefficient for 233mph with an expected ~4000lb curb weight based on the 3670lb 'dry' weight? Is the theoretica drag coefficient reasonable considering the amounts of downforce over the C7's also being claimed for the car?