New viper revealed tomorrow...

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SRT Viper Technologies

• Powertrain /
• Ride and Handling /
• Braking /
• Exterior /
• Interior

Awe-Inspiring Powertrain

The updated V-10 engine has an estimated power rating of 640 horsepower at 6,150 rpm, an increase of 40 horsepower over the 2010 Viper. Producing 600 lb.-ft. of torque at 4,950 rpm, the Viper puts out the most torque of any naturally aspirated sports car in the world.
Viper's legendary 8.4-liter V-10 engine features a new composite intake manifold, lighter forged pistons, stiffer pushrods, a revised camshaft profile, sodium-cooled exhaust valves and freer-flowing exhaust catalysts - all contributing to the 40-horsepower increase.
The new intake manifold is tuned using computational fluid dynamics (CFD), a high-performance computer-based simulation that has improved everything from Formula 1 car aerodynamics to nuclear submarine performance for silent running. The new forged pistons are not only lighter, but stronger and more durable to ensure precise piston/cylinder wall tolerances for consistent ultra-performance on the road and at the track.
Stiffer pushrods enable more precise valvetrain performance, while the revised camshaft profile works better with Viper's variable-valve timing (VVT) for enhanced power as well as lower emissions and fuel consumption. Sodium-filled exhaust valves run cooler to help protect against fuel mixture detonation in the cylinders which, along with better engine cooling, enables more aggressive spark timing for more torque and power. A revised catalyst wash-coat process enables a 20-percent reduction in back pressure that also helps improve power output.

A Tremec TR6060 close-ratio six-speed manual transmission is standard on both the SRT Viper and SRT Viper GTS. Closer ratios make Viper even more responsive, while a new sixth gear, combined with a shortened final-drive ratio of 3.55 to 1, produces noticeably better high-speed performance. New gear manufacturing techniques produce precision-formed teeth for smooth meshing while fine-pitch synchronizers reduce synchronizer travel, giving lower shift efforts and room for 15% wider first, second and third gears for better torque handling. Reverse selection is eased by the use of a double-cone synchronizer. Shift throws are 12.5 percent shorter.
The aluminum housing of the transmission is beefed up with thick flanges and cast-in ribbing to lower stress. It is also strengthened in the shift rail area, and the rails are held in place with shorter spans. This reduces the possibility of rail flex during spirited shifting while improving shift feel.
A new lighter flywheel, aluminum for the first time-ever in a Viper, gives a further tenth-of-a-second improvement in quarter-mile performance. A self-adjusting twin-disk clutch completes the package.

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Outstanding Ride, Handling and Capability

A leap forward in handling to the SRT Viper has been made via changes in the basic structure and refinements to suspension geometry. Performance is increased, weight is shed and Viper keeps its near perfect 50/50 weight distribution through its mid-front engine configuration - classic Viper since its inception in 1992.
A new lighter and stiffer space frame structure uses high-strength steel, magnesium, aluminum and carbon fiber to form the basis for all that's good with the 2013 Viper. SRT engineers designed the Viper with 50 percent more torsional rigidity and re-engineered nearly every chassis system to make the new Viper ready for both street and track.

Starting with a new chassis, SRT engineers improved torsional rigidity while shedding weight with strategic use of high-strength steel, aluminum and magnesium in critical areas. The frame is completely boxed for more strength and stiffness, aided by a new structural "X" member that ties together all four corners of the engine bay, similar to the all-conquering GTS-R competition car of 1996-2000. A cast-magnesium front firewall/dash structure, the largest such automotive casting in the world, enables unmatched strength, stiffness and mass reduction in that portion of the car.
The rear trunk pan is now a part of the overall structure, contributing to the new Viper's improved torsional rigidity. Viper has shed nearly 140 lbs., with the use of the latest lightweight materials, including composite body panels, lighter wheels and reduction in overall engine weight. Curb weight is as little as 3300 pounds with available SRT Track Package.

Suspension Enhancements

All of those characteristics provide an optimum platform for the four-wheel independent suspension system. All four corners incorporate aluminum unequal-length upper and lower "A" arms in a "SLA" (Short upper arms and Long lower arms provide optimum camber to keep tires in maximum road contact). Performance coil springs, gas-charged, aluminum body Bilstein® monotube dampers and tubular stabilizer bars front and rear complete the race-type suspension system.

The new suspension system and wheel package provides a wider front track. Rear suspension geometry is revised to move the toe link from behind the rear axle centerline to the front for increased stability on maximum acceleration and cornering. Wheelbase is 2,510 mm (98.8 inches), overall length 4,463 mm (175.7 inches) and width is 1,941 mm (76.4 inches).
Stabilty control is available for the first time on Viper and has been tuned by SRT's experienced in-house racers. The core SRT Viper has just two modes, "Full On" and "Full Off". GTS has four modes, "Full On," "Sport," "Track" and "Full Off." The settings affect the Vehicle Dynamic Control (VDC) and Dynamic Traction Control (DTC). Full Off deactivates both, but leaves active both the Anti-Lock Brake System (ABS) and Electronic Brake Force Distribution (EBD).
Both the core SRT Viper and Viper GTS take advantage of these electronic controls to optimize acceleration from a complete stop with standard launch control. The driver actuates launch control via a steering-wheel-mounted button, floors the throttle as the system holds rpm to the predetermined launch rpm, then releases the clutch. The TCS controls wheelslip by throttle only to maximize longitudinal acceleration. Viper accelerates smoothly and as quickly as possible without over-spinning the drive wheels and without over-revving the engine. Tuned clutch hydraulics ensure optimal clutch actuation.
The newly-available performance-oriented "Track Package" contributes a nearly-50-pound weight reduction through the use of Pirelli Corsa competition tires, two-piece brake rotors and ultra-lightweight wheels. The six-lug wheels are 18 by 10.5 inches in front and 19 by 13 inches in the rear on both Track Package and standard offerings. Tires are P295/30ZR18s on the front and P355/30ZR19s on the rear.
The ultra-performance steering system incorporates a premium power-assisted rack-and-pinion steering gear with a 16.7:1 steering ratio. Turning circle is 12.34 meters, 2.4 turns lock-to-lock. The system is tuned to provide exceptional on-center precision and linear response, enhancing the driver's communication with tires to the road through the steering wheel and offering increased effort gradient relative to cornering load.
Specific weight reduction contributors:
The new frame, using high-strength steel and optimized geometry, brings a 30-pound mass reduction without compromising strength or stiffness
"Lightening" holes in the ring gear of the rear axle represent a weight reduction of approximately .5 pounds
Ultra-light wheels included in the "Track Package" bring mass reductions of 24 pounds per set and the entire "Track Package" enables a weight saving of about 57 pounds, thanks in large part to the wheels and two-piece brake rotors
A robust, optimally-sized aluminum drive shaft - approximately 3.5 inches (88.9 mm) in diameter
A thinner, more efficient radiator core - 42 mm versus 52 mm - offers improved overall cooling while reducing weight
Tubular (hollow) front and rear stabilizer bars - five pounds lighter each than solid bars - represents a significant weight savings

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Benchmark Braking

While the SRT Viper is known for its sheer speed and acceleration, it also has an ultra-performance braking system. Engineered using 14-inch (355 mm) vented rotors front and rear and Brembo® 44/40 mm four-piston calipers in front and 42/38 mm four-piston calipers in the rear, the Viper has the capacity to take full advantage of the grippy Pirellis. The system is designed to deliver shorter stopping distances, better brake modulation, firmer pedal feel and less brake fade than other high-performance luxury cars. The lightweight aluminum Brembo calipers are fully machined on the exterior to maintain their striking appearance for years.

The optional "Track Package," available on both models, features StopTech two-piece rotors that reduce weight by one-third and feature a billet aluminum "AeroHat" design and curved vanes between the cheeks to pump brake cooling air at high speeds. The hats are finished with hard anodizing that retains its look despite high temperatures. Brake pad material are engineered to have the high temperature capability for the race track, while providing low noise levels and good manners for high performance road work. An optimally-sized brake booster/master cylinder assembly also incorporates lighter materials.

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I guess they figure save weight and keep using the 14 inch brakes

[BigHemiSrt]

Really shocked they didnt go with 6 piston fronts...

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Well from what i was reading they trying to save weight in alot of places so thats probably why

[DGthe3]

In the interest of keeping things organized ... please continue the discussion about the new Viper in this thread:
2013 SRT Viper .... wow