2008-2010 Dodge Viper ACR
For 2010 the Dodge Viper ACR increased 0-200 mph times by 14 seconds, with a top speed of 202 mph. The Viper ACR does 0-60 in under four seconds, 0-100 in 11 seconds flat, an 11.5 quarter mile, and over 2.0 peak Gs. Braking is rated by Dodge at 60-0 in 100 feet. This came about as a result of a new gear ratio (fifth gear went from .741 to .796), and redesigned rear wing and end plates, along with a new short-throw shifter. (The 2009 Dodge Viper ACR got a modified steel frame, fuel tank, and filler tube, with new colors, optional wheels, and recessed window switches.)
The 600-horsepower 2008 Dodge Viper SRT10 ACR is a street-legal Viper engineered to dominate on the race track. Because it is street legal, diehard Viper and track enthusiasts can drive their car to the race track, run it at speed on the track, and then drive it home. Mike Accavitti, Director – Dodge Brand and SRT Marketing and Communications, said, “With the Viper SRT10 as the starting point, SRT engineered a combination of reduced weight, race-tuned suspension and aerodynamic improvements to create the ultimate Viper for the street and track.”
The 2010 Vipers have customizable looks, with new colors (Toxic Orange and Silver, which was only available on a limited edition last year), Viper and 10 other exterior colors, six stripe colors, five interior colors, three interior bezels, and four wheel options. That makes for more than 7,000 different appearance combinations on a limited run of only 500 cars being produced — meaning that chances are each and every 2010 Viper will end up with its own unique look.
Viper SRT10 ACR suspension and brakes
The Dodge Viper SRT10 ACR is specifically modified and tuned for track performance. The ACR suspension includes coil-over racing dampers from KW Suspensions that are adjustable for damping and ride height. The shocks are two-way adjustable without removing the wheels – a timesaver on the track – and they include a large range for compression and rebound. The KW dampers and forks are machined from solid aluminum billet, feature spherical bearing mounts, and are optimized to minimize weight and maximize performance. A new front stabilizer bar increased roll-stiffness.
Lightweight forged aluminum Sidewinder wheels were optimized by using Finite Element Analysis to achieve a lower rotating unsprung mass. Finished in gloss black paint, they wear Michelin Pilot Sport Cup DOT-approved (street legal) race tires, providing enhanced grip on the track.
Weight-savings were achieved with the Michelin Pilot Sport Cup Tires, Sidewinder lightweight wheels, and StopTech brake rotors. With the aerodynamic and suspension elements, the 2008 Dodge Viper SRT10 ACR is 40 pounds lighter than the Viper SRT10 coupe. The optional Hard Core package further reduces the weight by another 40 pounds, for a total weight savings of 80 pounds.
StopTech two-piece, slotted, lightweight rotors combine with the Viper SRT10’s Brembo calipers to reduce rotating inertia and unsprung mass, improve brake cooling, and significantly reduce fade even under extreme conditions. The StopTech rotors feature a patented curved-fin design, a key element in improving brake cooling. The StopTech brake rotors combined with the Michelin Pilot Sport Cup Tires and Sidewinder lightweight wheels combine to reduce 60 pounds of unsprung, rotating mass. The 2008 Dodge SRT10 Viper ACR stops from 60 mph in less than 100 feet.
The 8.4-liter aluminum V-10 engine that produces a ground-shaking 600 horsepower and tire-smoking 560 lb.-ft. of torque. It features a deep-skirted V10 aluminum engine block, cylinder heads equipped with Computer Numerically Controlled (CNC)-shaped combustion chambers, large valves and Variable Valve Timing (VVT). VVT electronically adjusts when the exhaust valves are open and closed according to engine speed and load, allowing the engine to “breathe” cleaner and more efficiently.
The two-piece intake manifold combines cast aluminum lower with smooth runners for better air flow, bolted to a die-cast aluminum upper plenum. A revised air-cleaner box with a low-restriction filter sends air through a dual electronic throttle control into the intake module.
The air-fuel mixture in the cylinders is ignited by platinum-tip spark plugs fired by individual plug coils mounted on the cylinder-head covers.
Within the cylinders, pistons are equipped with large-diameter floating pins with bronze bushings for high-load capability. Forged powder-metal connecting rods are secured with aircraft-quality fasteners for increased fatigue strength.
Engine lubrication is managed by the large oil pump and a swinging oil pickup adapted from Viper competition engines, to ensure proper oil pressure in high-rpm and hard cornering conditions.
The Tremec T56 six-speed manual transmission (model TR6060) conveys power via a GKN ViscoLok speed-sensing limited-slip differential.
2008 Viper ACR styling
The 2008 Dodge Viper SRT10 ACR exterior styling provides functional benefits on the track. These include a variable geometry “fanged” front splitter, an adjustable rear wing sculpted by CFD (Computational Fluid Dynamics), and optimized front dive planes. These new aerodynamic devices are formed in high-performance autoclaved carbon fiber. By using both unidirectional and woven laminates, the aero equipment is optimized for the minimum possible weight. The splitter and dive planes feature a clear coated carbonfiber weave on all Viper SRT10 ACR models.
The front splitter includes three removable rub strips that provide protection and wear resistance. Supported by stainless steel tension cables, the splitter is designed to absorb the energy from minor upward deflections.
Aerodynamics are tuned to maximize downforce and provide increased levels of lateral grip. Each Viper SRT10 ACR also includes a track extension that replaces the center splitter rub strip and fills out the fanged splitter scallop for closed-circuit events. The aerodynamic effect of the track extension is a reduction in overall drag and an increase in front downforce of nearly one third.
The front fog lamps have been deleted and replaced with lightweight filler panels.
The 2008 Viper SRT10 ACR features a signature two-tone paint scheme with a black center section. An optional driver’s stripe is available on a two-tone Viper Red or a Viper Black ACR. The driver’s stripe also features a sewn leather accent on the steering wheel. A clearcoated exposed weave is featured on the rear carbonfiber wing of all two-tone and driver’s stripe Viper SRT10 ACR models.
A standard Viper SRT10 monotone paint scheme is also available featuring a body color rear wing and dual painted Viper stripes. The 2008 Dodge Viper SRT10 ACR is available in five colors: Viper Red, Viper Black, Viper Violet, Viper Bright Blue Metallic, and Viper Very Orange. Lightweight forged aluminum Sidewinder wheels are painted gloss black to complete the one-of-a-kind exterior styling.
Inside, an optional “Hard Core” package offers maximum weight savings by deleting the audio system, underhood silencer pad, trunk carpet and tire inflator. The radio is replaced by a lightweight cover that can be configured to mount the included lap timer. The door speakers are replaced by lightweight carbonfiber panels. The Hard Core package offers a 40 lb. weight savings and provides ultimate street legal race-ready performance.
The 2008 Dodge Viper SRT10 ACR will be hand built at the Conner Avenue Assembly Plant in Detroit. It will arrive in showrooms in the second quarter of 2008 at a Manufacturer’s Suggested Retail Price (MSRP) of less than $100,000.
All dimensions are in inches (millimeters) unless otherwise noted.
Dodge Viper ACR V-10 Engine
|Bore x stroke||4.055 x 3.96 (103 x 100.6)|
|Valve System||OHV, Variable Valve Timing, 20 valves, roller-type hydraulic lifters|
|Construction||Aluminum alloy block with cast-iron liners, aluminum alloy heads|
|Power (SAE net)||600 bhp (450KW) @ 6100 rpm; torque, 560 lb.-ft. (760 N•m @ 5000 rpm)|
|Fuel required||91 octane (R+M)/2|
|Capacities||Oil, 10 quarts (9.5l); antifreeze, 16 quarts (15l); fuel, 16.0 gal. (70L)|
- Synchronized in all gears, electronic 1-4 skip-shift and reverse lockout mechanisms.
- 2008-2009: 2.66, 1.82, 1.30, 1.00, 0.741, 0.50; 2010, 2.66, 1.82, 1.30, 1.00, 0.796, 0.50
- Axle ratio, 3.07:1; overall top gear ratio, 1.5:1
Dodge Viper ACR basics
Longitudinal front engine, rear-wheel drive layout. Made from a backbone tubular space frame with separate cowl structure. SMC and RIM body panels, aluminum sills, RIM front and rear fascias with composite impact beams. In front, aerodynamic effects include a carbon fiber ‘fanged’ splitter with rub strips; splitter extension; and carbon dive planes. In back is a carbon fiber ACR wing with 7-position adjustable stanchions. Downforce at 150 mph with the high downforce setup was 1,000 lb in 2010.
The suspension was fully independent with high-performance aluminum control arms and knuckles, and KW Suspensions 2-way adjustable competition coil-over shock absorbers. In front, they used cast-aluminum unequal-length upper and lower “A” arms, high rate coil springs, and gas charged 2-way adjustable monotube shocks absorbers, and a high rate stabilizer bar. In the rear, they used cast-aluminum unequal-length upper and lower “A” arms, toe-control links, high rate coil springs, gas charged 2-way adjustable monotube shock absorbers, and a stabilizer bar.
Other 2008 - 2010 Dodge Viper specifications
|Battery||Maintenance free 600 CCA|
|Stereo||AM-FM-CD 310 watt RMS amp with seven speakers, MP3 disk capability|
|Track, F/R||61.6 (1565) / 60.9 (1547)|
|Width (at sills)||75.2 (1911)|
|Ground clearance||5.125 (130) (with two people)|
(with two people)
|3,408 lbs. (1552 kg), ACR;
3,366 lbs. (1533 kg) ACR with Hard Core (Audio Delete) Package
Weight distribution, ACR: 49.5/50.5
|Frontal area||19.3 sq. ft. (1.79 sq. m)|
|Headroom||36.5 (926 mm)|
|Legroom||42.4 (1077 mm)|
|Shoulder room||54.1 (1375 mm)|
|Seats||45° recliner range; 7.6 inches, seat travel|
|Steering||Power-assisted rack and pinion (16.7:1 overall ratio)|
|Turning||Curb to curb diameter: 40.5 ft (12.34m); steering turns, 2.4|
Michelin® Pilot® Sport Cup with low-pressure sensors in valve stems
|Wheels||Lightweight forged aluminum, 18” x 10.0”—front, 19” x 13”—rear|
|Front brakes|| 14.0” x 1.26” (355.0 x 32) vented disc, with Brembo 44/40
opposing piston calipers, curved fin vented StopTech 2-piece slotted rotors
|Rear brakes||14.0” x 1.26” (355.0 x 32) vented disc, with Brembo 42/38
dual opposing calipers, curved fin vented StopTech 2-piece slotted rotors
|Brake assist||Tandem diaphragm vacuum with zero lost travel|
Dodge and SRT Vipers at Allpar
- Viper Prototype
- 1992 to 2002 Viper RT/10 and GTS • ACR and GT2 (1998-99)
- 2003-2007: Dodge Viper SRT-10
- 2008-2010 Dodge Vipers
- 2013 and onwards (Specs • Engine • Suspension • Design and Body)