Hey fair enough,
CTSV 550hp / 4300lbs = 0.127906976744 Power to Weight Ratio
Z06 505hp / 3180lbs = 0.158805031447 Power to Weight Ratio
LS3 Vette 430 / 3300 = 0.130303030303
Edit:
I just realized you meant the LS3 not the LS7 in your last post. added above
That is a huge difference.
No biggie. And I think you are forgetting to account for the vastly improved suspension on a corvette.
But, I'm in no way trying to pick a fight. I'd love to see the V hit the numbers you suggest.