In 2006 Chevrolet released their Silverado 427 Concept, a new design that wanted to redefine the muscle car expression and the performance of the Silverado line. Powered by a 7.0 liters engine, Chevrolet Silverado 427 Concept successfully demonstrated all these in a short time. Chevrolet Silverado 427 Concept has a GM Power train's 7.0 liters LS7 engine, that is able of no less than 505 HP and a maximum torque of 470 Nm, a Tremec heavy-duty manual transmission in 6 speeds, 3.73 gears and some five spoke aluminum wheels of 22 x 10 inches, covered in Pirelli Scorpion performance tires that have dimensions of 305/40ZR22. The design of Chevrolet Silverado 427 Concept is amazing and aggressive: new front and rear cowl, hood, fascias, tonneau, tailgate, shaved door handles, ITW Active Touch system for the doors and some tight body-side cladding.
During the heyday of the muscle car, three digits struck fear into the hearts of challengers who found themselves unlucky enough to sidle up next to a Chevy wearing the badge 427. The badge is back on the Silverado 427 - a concept vehicle that demonstrates a tangible extension of the new Silverado's performance parameters.
The Silverado 427 is powered by GM Powertrain's 7.0-liter LS7, the same Gen IV small-block V-8 that is the center of power in the Corvette Z06 and available as a "crate engine" package from GM Performance Parts. Its cubic-inch displacement is 427. A six-speed manual transmission backs the engine, providing the driver with full control of the vehicle's substantial capability.
"There's hardly a more legendary - or menacing, depending on your point of view - moniker in the world of performance than '427'," said John Cafaro, chief designer for full-size trucks. "The Silverado 427 concept delivers on the expectation of that revered badge with performance that equals or surpasses the original."
More than just a pickup with a more powerful engine, the Silverado 427 is a total performance package, with a lowered suspension that delivers racecar-like reflexes and an exterior styling package that is simultaneously aggressive and understated.
"The regular cab, short box body style of the Silverado 427 was a deliberate choice, because it represents the essence of elemental performance: filling the smallest, nimblest body and chassis with the most powerful engine," said Cafaro. "Indeed, all elements of this concept are simple and minimalist; it is equipped only with the components necessary to convey its performance."
This means a traditional rear-drive layout for the Silverado 427. There is no all-wheel drive or electronic traction enhancers. Luxury features also were kept to a minimum, as the vehicle's focus was kept squarely on performance.
Complementing the Silverado 427's performance is a thoughtfully designed exterior that deftly incorporates high-performance styling cues in a restrained manner, giving the truck a look that is unmistakably aggressive yet respectful of its minimalist performance ethic. The design incorporates numerous changes compared with production Silverado models, including new front and rear fascias, hood, cowl, tailgate, tonneau and body-side cladding.
Many of the design elements are subtle, such as the tight body cladding - which incorporate polished billet side-exit exhaust outlets - and shaved door handles. Other elements immediately draw the eye; the most prominent of these being the dramatic hood scoop. It was designed as a contemporary interpretation of the famous Corvette "Stinger" hood scoop, which identified 427-powered Corvettes of the mid-1960s. And like the original Stinger scoop, the Silverado 427's hood scoop is emblazoned with the "427" numbers and a complementing accent color over the Laser Blue exterior color.
The grille, fascias and tailgate all are designed with a performance-oriented, streamlined appearance. The doors are opened via an ITW Active Touch.
Inside, the Silverado 427 is outfitted with Corvette seats that have been covered with custom Soliel Keisel leather upholstery and equipped with three-point racing-style harnesses. The perforated, black leather seat coverings have blue inserts. Between the seats is a custom center console that incorporates the shifter and houses a set of billet-face instruments. Other details include a revised instrument panel, with billet inserts and trim.
Fitting the LS7 engine into the Silverado's engine bay was relatively simple, because it is based on the same Gen IV small-block V-8 family as the Silverado's regular production V-8 engines - and is available as a "crate engine" package from GM Performance Parts. A custom-fabricated air intake system was designed for the Silverado 427, adding not only a necessary air path for the engine but also some underhood distinction.
The LS7 is rated at 505 horsepower and 470 lb.-ft. of torque, and is built with lightweight reciprocating assembly components and other design features that have their roots in the Corvette racing program. In fact, the LS7 uses a racing-style dry sump oiling system that ensures optimal engine oiling during all driving and cornering maneuvers. Engineers had to make room under the Silverado's hood for the LS7's external oil supply tank.
The Silverado 427's LS7 engine is backed by a Tremec heavy-duty six-speed manual transmission, which transfers torque to GM's automatic locking rear axle. It's fitted with 3.73 gears, which multiplies the torque of the LS7 to provide muscle car-challenging acceleration. The six-speed transmission has a steep, 3.01:1 first gear, which contributes to a tremendous performance at launch, while two overdrive gears balance the Silverado 427's performance with fuel economy that first-generation 427 drivers could only dream of.
Complementing the drivetrain is a set of 22 x 10-inch five-spoke aluminum wheels mounted to wide Pirelli Scorpion 305/40ZR22 performance tires, which do their best to maintain adherence to the Tarmac as the LS7's revs climb. The tires are the contact points for a performance-tuned suspension that used Ground Force custom front and rear lowering springs, front struts and rear shocks. The lowered suspension helps the Silverado 427 corner flatter and with more precision, while also giving the vehicle a "just right" performance stance. A set of Baer disc brakes, with six-piston calipers and 16-inch-diameter rotors, provides the stopping force for the vehicle.
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