I'm working on the video from last night. Forgot I never posted this one over here.
Here it is
http://www.03svtcobra.net/Videos/LankC6Z06VsGT500.wmv
Still somewhat hard to believe that the GT500 needs ~180 RWHP extra to run even with a ~500-510 RWHP C6 Z.
For comparison, here are the runs with the 640 RWHP one - This is not the linked video, but an older run with a different GT500
YouTube - Lankhoss' C6 Z06 Vs. KB '07 Shelby GT 500
I was told that the GT500 does have headers - and dyno'd 670 RWHP. I didn't know about this until after I made the video.
Also, the driver / passenger in the GT500 are ~215+ each - the driver / passenger in the Z are ~165 and 145 - we're big dogs,
We did run with the GT500 not having a passenger and me in the Z - and the GT500 pulled about a fender up until he had to shift into 5th - then the Z slowly pulled back.
Seems a lot of people are calling BS on this video on other forums (Streetfire idiots especially) and claiming that the dyno #'s for the cars must not be correct.
However, the majority of people just don't seem to have a clue as to how big of difference weight makes in a race. The Z06's race weight with occupants was ~3420 lbs, the GT500 was ~4,430 lbs. A 1,000 lb difference will take a massive amount of HP to overcome. The Z06' dyno #'s are HOT and the GT500' #'s are with a cool-down.