C7's already proven to be about 2-sec/lap quicker around VIR than the old C6 Grand Sport.
Whether the Z/28 will be quicker than a C7 is an interesting debate.
Yeah, it's got 55 more horsepower but it's also got about 500-lbs more to carry and it's got worse areo.
Once the C7 Z51 is available it would be really interesting to test it against the Z/28.
If you're looking for Camaro LS7 info, it's at: