Check out this video by GT Drummer Dude on YouTube of the Omega Motorsport NoFlyZone ARIZONA Event at the Gila Bend Municipal Airport.
Per his description:
The Z06 had a passenger and the C8 did not. This was my slowest pass of the day at 136.5 mph. My fastest pass was 144.6 mph and the fastest pass of this stock C8 was 144 mph. After 2 or 3 passes I was doing 141-144 mph the rest of the day, exactly the same as this C8 was doing all day. The fastest pass of another C8 with headers and exhaust was 148 mph. I just wish the only video I got against a C8 wasn’t my slowest pass of the day by 8 whole mph… With no passenger in my later runs I would have been door to door with this guy all the way down the track. The 1/2 mile trap speeds tell the tale though- the C8 is no faster than a stock C5Z with a good driver.