Dodge Viper GT2 and Dodge Viper ACR (1998-99)
Have you visited our main Viper page?
Dodge Viper GT2
In 1995, Chrysler introduced the Dodge Viper GTS-R, a limited-production racing car strictly intended for worldwide GT-class competition. The standard powertrain was a 525-horsepower 8.0 liter V-10, with 650- or 750-horsepower engines available as an option. It clinched the 1997 FIA GT2 championship and the 1998 24 Hours of Le Mans in the GT2 Class.
To publicize this achievement, Chrysler built 100 street-legal 1998 GT2 Championship Edition Vipers. It was painted the same way as the GTS-R, with an aerodynamics package of fascia dive plates, black sill ground effects, a front splitter and rear wing. An enhanced powertrain (see the ACR description) raised performance to 460 hp @ 5200 rpm from 450 hp @5200 rpm and increased torque to 500 ft/lb at 3600 rpm from 490 ft/lb at 3700 rpm.
Special badging and graphics included a "Viper GTS-R" banner on the windshield and hood sides and an American flag appeared on the upper quarter panel with "FIA GT2 Champion" underneath. 18-inch Michelin MXX3 tires and unique 18-inch one-piece wheels complete with a chrome Viper snake head logo on the center caps completed the visibility options.
The interior was black with blue accents on door inserts, bolsters, and the center console and parking brake. A dash plaque highlighting the commemorative series and vehicle identification number (VIN) was mounted on the center console. The interior came with a five-point restraint system, identical to the restraint system used by Viper Team ORECA, the France-based factory race team that captured both championships. The retail price was $85,200 including destination.
Dodge Viper ACR
The 1999 Dodge Viper ACR (American Club Racer) was a hybrid of the GTS-R and the standard Viper. The major changes to make these vehicles race-ready were more power, lower weight, and refined handling:
- Smooth intake hoses and a K&N air filter element increased air flow to add 10 horsepower.
- 60 pounds were cut by removing the audio system, air conditioning, and fog lights (brake cooling ducts can be put into the openings).
- Suspension components have been replaced by GTS-R racing units with Meritor (formerly Rockwell) springs. Michelin Pilot Sport high-performance radials (P275/35ZR18 front, P335/30ZR18 rear) mount on one-piece 18-inch BBS wheels for improved traction.
The ACR had the interior enhancements of standard Vipers: power sideview mirrors, cloth-covered sun visors, a satin aluminum finish on gauge trim rings, parking brake handle and release button, shift lever shaft, gearshift knob and inside door release handles.
The ACR concept started with the Dodge Neon; the idea was to provide racing enthusiasts with a reasonably priced entry to Showroom Stock classes. Neon ACRs won the Sports Car Club of America (SCCA) Showroom Stock/C class in 1995, 1996 and 1997. Neon drivers also scored 127 wins and 311 top-three finishes in 216 national events; one Pro Rally production-class championship and five Solo Two national championships in 1997.
Special Dodge Viper ACR Equipment
Special ACR badging and graphics including commemorative dash plate. Five-point restraint system, K&N air cleaner, smooth air cleaner hoses, one-piece 18-inch BBS wheels with chrome Viper Head center caps and Michelin Pilot Sport tires. Vents replaced driving lamps. A/C system/compressor deleted, audio system deleted, Koni racing shocks and Meritor springs. A/C and audio systems were optional.
Analog speedometer, odometer, trip odometer, tachometer, voltmeter, oil pressure, coolant temperature and fuel gauges. Low oil pressure, coolant temperature, air bags, high beam, seatbelt, brake system and service engine soon, 2-3 shift lockout, battery voltage, door ajar, turn signals and security alarm indicator lights
Body And Frame
Resin transfer molded (RTM) composite body with sheet-molded compound (SMC) hood, backbone tubular steel space frame with center spine and separate cowl structure. Full-access forward-opening hood/fender assembly
|Engine||8.0-liter, OHV, SMPI V-10|
|Type & Description||Ten cylinder, 90º V-type, liquid-cooled|
|Displacement||488 cu. In. (7,990 cc)|
|Bore x Stroke||4.00 x 3.88 (101.6 x 98.5)|
|Valve System||OHV, 20 valves, roller-type hydraulic lifters, dual valve springs|
|Intake System||Sequential, multi-port electronic fuel injection with bottom-feed, high-impedance injectors, aluminum ram-tuned intake manifolds with dual plenums|
|Exhaust||Stainless steel tubular exhaust manifolds, multiple-branch design, three-way catalytic converters with dual oxygen sensors, two per side, feedback fuel-air ratio control,one-piece stainless steel catalyst in sill and muffler assembly featuring rear exit exhaust|
|Construction||Aluminum alloy block w/cast iron liners, aluminum alloy heads, forged-steel crankshaft, six main bearings|
|Cooling||Copper-core radiator, dual-speed electric fan, front-mounted engine air-to-oil cooler|
|Horsepower (SAE net)||460 bhp (343 kW) @ 5200 rpm|
|Torque (SAE net)||500 lb. ft. (664 Nm) @ 3700 rpm|
|Max Engine Speed||6000 rpm|
|Fuel Requirement||Unleaded premium, 91 octane R+M/2|
|Oil Capacity||8 qt. (7.6 L)|
Manual, 6-speed overdrive transmission, synchronized in all gears; electronic 1-4 skip-shift and reverse lockout mechanisms. Aluminum housing, 12.2-inch hydraulic single dry-disc clutch. Gear ratios:
|Effective Final Drive||3.07|
|Overall Top Gear||1.54|
Chassis & Suspension
|Ground Clearance||5.0 (127)|
|Curb Weight||3356 lbs (1525 kg) / 3403 lbs (1547 incl. optional A/C and audio systems)|
|Weight Distribution f/r||48/52|
|Front||Independent with cast aluminum unequal-length upper and lower "A" arms. GTS-R-style Meritor racing coil springs in threaded seats. GTS-R aluminum-bodied Koni racing shock absorbers, double-acting, high-pressure gas-charged, externally adjustable for bump and rebound, 1.06 in./27 mm tubular front stabilizer bar|
|Rear||Independent with cast aluminum unequal-length upper and lower "A" arms with separate toe link. GTS-R-style Meritor racing coil springs in threaded seats. GTS-R aluminum-bodied Koni racing shock absorbers, double-acting, high-pressure gas-charged, externally adjustable for bump and rebound, 0.86 in./22 mm tubular rear stabilizer bar|
|Steering Type||Power-assisted rack & pinion|
|Turning Diameter||40.5 ft. (12.34 m) curb to curb|
|Steering Turns||2.4 lock to lock|
|Wheels||BBS forged aluminum|
|Size||18 x 10 front, 18 x 13 rear|
|Tires, f/r||P275/35ZR18 / P335/30ZR18 Michelin Pilot Sport high-performance radials|
|Front Brakes, Size & Type||13.0 x 1.26 (330.5 x 32) vented disc power assisted w/four-piston Brembo fixed caliper|
|Swept Area||304.8 sq. in. (1966 sq. cm)|
|Rear Brakes, Size & Type||13.0 x 0.87 (330.5 x 22) vented disc power assisted w/single piston Brembo sliding caliper|
|Swept Area||244.3 sq. in. (1576 sq. cm)|
|Brake Power Assist Type||Tandem diaphragm vacuum w/zero lost travel|