Ok, 997HP and 943 lb-ft of TQ at the crank depending on what you use for driveline loss but who's quibbling!
847hp / 801 lb-ft TQ
at the rear wheels on 16psi of boost!
Built block 415 CID stroker LS3 with twin 62mm turbos...
Hennessey loaded a nice rich tune (IE:SAFE) and turned the boost up from 11 to 16 and on the first pull this is what they got.
Since they're only on the hook to provide 800HP at the crank we normally run it at 11psi with a conservative tune and it makes 870HP at the crank which is actually drivable on the street believe it or not. Heh!
Gotta love 'trunk monkeys' BTW... LOL! They needed the extra weight to keep it from hazing the tires on the roller. No matter how much you winch it down that much torque/HP will spin even max performance 'summer' tires unless you add a bunch of weight.