For what would be considered a first-stage buildup of the 4.6-liter Cobra, the Kenne-Bell car elicited impure thoughts and encouraged mischievous behavior with alluring grace. For a modest investment, the next level of performance could be attained with the computer chip, headers, exhaust, and throttle body that are currently completing testing at Kenne-Bell's R&D facility.
Engine: 4.6-liter DOHC V-8Major engine modifications: Kenne-Bell WhipplechargerHorsepower @ rpm: 392 @ 6300 (est.)Torque, lb-ft @ rpm: 371 @ 5850 (est.)Transmission: Five-speed manualBrakes, f/r: Baer Racing Pro Race vented discs/vented discs, ABSWheels, in.: 17 x 8.0TSW Hockenheim RTires: 275/40ZR17 GS-C, GoodyearOther mods: Eibach springs, Global West camber platesModifications and labor: $10,000
DC Sports ACURA NSX - 338HPJapanese Exotic Turned Ninja WarriorAcura's performance warrior appeared to be threatened seriously by the megahorsepower monsters gathered at the Firebird Raceway for our cost-no-object performance test. Facing the likes of the venom-dripping Hennessey Viper with 2.8 times more displacement, and the megadollar supercharged Porsche, whose every spoiler and air intake screamed autobahn dominance, the Japanese exotic appeared to be the underdog from the start.
In the company of these hairy-chested competitors, the NSX shines as one of the only supercars in the world that can serve comfortably as a daily commuter by combining the finest race technology with the Accord's user-friendly nature. Thus, the DC Sports Honda/Acura tuning gurus had their work cut out for them when they began tackling the well-balanced NSX; the wrong combination of performance mods could reduce the exceptional mid-engined sports car to a mere race sled with a bone-jarring, soap-box-derby ride.
To achieve the next stage of performance evolution, the Darwinian technicians at DC Sports took a milder approach than some of the other companies at our gathering. Led by twin brothers Darrell and Darrick Contreras, DC Sports' power-hungry scientists kept the stock 3.0-liter V-6's displacement intact and didn't mutate the species with turbos or nitrous oxide. Instead, they developed an array of bolt-on components and machining techniques to aid the NSX in achieving its genetic potential. For better breathing and much-needed torque increase, DC Sports fitted stainless-steel headers to the aluminum engine, which in turn feeds into a free-flowing exhaust system finished with a pair of cavernous four-inch tips-large enough for small forest animals to call home.
By installing modified VTEC camshafts, DC Sports was able to increase the amount of time the valves remain open, increasing the flow of the air-fuel mixture and consequently increasing the power output. To make further gains, the throttle body was bored from 64 to 67 millimeters, and both the intake manifold and cylinder heads were port-matched and polished by hand, a tried-and-true hot rodder's trick to improve engine efficiency. Continuing on the intake side, the fuel injectors were modified for increased flow, as was the air box, which now houses a nonrestrictive air filter. Because this car was being built for daily driving, albeit to outrun Yakuza hitmen, the stock oil-pump gears were replaced with heavy-duty gears that increase the oil volume and improve reliability. Once the labor-intensive engine work was complete, its oil was drained and replaced with Motul synthetic racing oil. And for good measure, the stock 4.05:1 ring and pinion was replaced with a more aggressive 4.55:1 gearset guaranteed to wake this warrior like a hearty tug on a topknot.
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