FWIW I was playing with my EFI live and recorded a 0-60 time of 4.2 with my cam headers and intake on my 11SS, and I'm far from skilled when it comes to launching. I would think the lighter Z28 would have no problem matching it with bigger tires and lighter weight.
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American Racing 1 7/8" Headers and Hi-Flow Cats, CAI cold air intake, Flowmaster AT exhaust, Vengeance Racing Stage 2 cam, VMax ported throttle body, TEA valve springs and titanium retainers, Trick Flow hardened pushrods, 180* T-stat, Comp Trunion kit, ZL1 Fuel Pump, ADM Fuel Pump Control Module, 20% window tint, Whipple Supercharger. Tuned by Mike Norris Motorsports. 656rwhp/584rwtq @10 PSI.