Unlike his other offerings, John Hennessey’s CTS-V–based V700 didn’t trigger our low-courage warning light. That may be because Hennessey told us that this was his personal car used to cart his children around suburban Houston. Or it may be that the sedan, aside from its massive 20-inch billet aluminum wheels (a $5500 option) and blacked-out trim, looks bone stock. More likely, it was because we knew that Hennessey recently lured John Heinricy, one of the GM engineers responsible for the current, very friendly CTS-V, from the cozy nest of retirement to consult with him on changes to the car.
As the V700 nomenclature hints, the modified 6.2-liter LSA underhood makes 707 horsepower at 6300 rpm. To bump output from the stock engine’s 556 horses, Hennessey pushes the redline 300 revs to 6500 and ups the boost to 13.5 psi (from 9.0) by manipulating supercharger-pulley dimensions. So that the highly stressed engine won’t cannibalize its valves, rings, and seals, he replaces the camshaft, the catalytic converters, the intake, the headers, and the middle section of the exhaust. He swaps the heads for high-flow versions, upgrades the intercooler, and reflashes the ECU. The tweaks run $19,950, installed. If getting your V to Hennessey’s shop in Texas is problematic, he offers a 650-horse mail-order kit for $5950. Our test car also came with Brembo two-piece front brake rotors ($1595), Hawk brake pads ($995), a Centerforce clutch ($2350), some “extreme duty” CV joints ($2900) that hold up to the pavement-shifting grip of drag slicks, and a few cosmetic add-ons. Total cost as delivered: $103,625.
Read More: http://www.caranddriver.com/reviews/car/11q1/hennessey_cadillac_cts-v_v700-specialty_file
