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Filed under: Aftermarket , Motorsports , Tuners , Sports/GTs , Supercars , Dodge Click above to view Hennessey's Viper ACR upon delivery Gearheads across the country are crossing off days on the calendar until May 2 when One Lap of America returns. The annual event, for those unfamiliar, takes participants across the country on a Cannonball-style rally competing on racetracks and road courses scattered along the way. Dodge always makes a strong showing at One Lap, and the team at the company's SRT workshop planned on entering two vehicles this year: a Challenger and a Viper. Time and resources being limited however, Dodge SRT turned to noted Viper tuner John Hennessey to help prepare a brand spankin' new Viper ACR - unveiled just this past November in LA - for the event. To that end, Dodge sent the first Viper ACR off the assembly line to Hennessey, who is now undertaking the task of preparing the car for the race next week. With SRT chief Erich Heuschle driving the Challenger...
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Filed under: Aftermarket , Tuners , Coupes , Sports/GTs , Supercars From the Mustang to the Viper and Veyron, Hennessey Performance has spread its abilities across the performance car spectrum. And with hi-po vehicles like the IS F, ZR1, and GT-R on their way to buyers' garages, John Hennessey says he is working on packages to make all of those cars even higher-po. The IS F looks to be the first in line, with the experiment subject arriving at Hennessey's shop next week. The car will be a test bed for "headers, exhaust and air induction systems first. Then maybe a blower." He's also got his eye on the baddest boy Corvette ZR1, for which his website advertises "700+ HP coming soon!" The physics-defying GT-R is in the crosshairs as well, and if he can make it better than it already is, that would be among the best testaments for his services. Coming down just a notch -- but still up there -- the Cadillac CTS-V and Camaro will get their chances for glory as...
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Filed under: Aftermarket , Tuners , Coupes , Sports/GTs , Dodge Click above for high-res gallery of the 2008 Dodge Challenger SRT8 It's been less than a month since Dodge officially took the wraps off the Challenger SRT8 , and horsepower fanatic John Hennessey already has a performance package available called the SRT700 that will have muscle car fans tingling with excitement. Since there's no replacement for displacement, Hennessey adds extra cubes to the 6.1-liter V8 with a stroker crankshaft, pushing it out to 426ci. For good measure, a 67mm turbocharger system is added as well, complete with an air-to-air intercooler. Forged aluminum pistons, forged steel connecting rods, high-flow cylinder heads, and a 3-inch exhaust system are also added, among other upgrades. The result is a tire-shredding horsepower increase of nearly 75% - 725 bhp @ 5200 rpm and 750 lb-ft @ 4000 rpm. Hennessey claims it's good enough for the Challenger SRT8 to hit 60 mph in 3.5 seconds (with the optional...
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Filed under: Aftermarket , Supercars Evidently not satisfied with having trounced the Bugatti Veyron in Road & Track 's 0-200 mph showdown with its twin-turbo Viper, those tuners on speed over at Hennessey Performance Engineering are preparing a mid-engined supercar of their own. We brought you initial news , coupled with a teaser image, back at this year's SEMA show, but the company has now released additional information and the conceptual sketch you see above, which was penned by British auto designer Steve Everitt , who evidently likes the Lotus Elise/Exige, but thought it could use more oomph. Built around the company's thousand-horsepower twin-turbocharged Dodge Viper V10 engine, the Venom GT would benefit from the immense power in a lighter-weight package weighing in around 2700 lbs. Carry the zeros and we're looking at 2.7 lbs per hp, giving the special Hennessey a 0-100 km/h (0-62 mph) time estimated at less than 2.5 seconds, en route to an anticipated 300 km...
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