2007 WORLD CHALLENGE SEASON

Transcription

1 2007 WORLD CHALLENGE SEASON VEHICLE MANUFACTURER: YEAR & MODEL: Dodge (05-07) Viper Competition Coupe (Full Prep) This specifications form was developed by SCCA Pro Racing and will be used by the Series Technical Administrator to establish technical compliance for vehicles competing in the SCCA PRO RACING WORLD CHALLENGE series. Technical Administrator can also use, but is not limited to also using the following items to check compliance: Electronic Parts Catalog (EPC), Technical Information System (TIS), and the FIA/ASN Homologation forms (or equivalent documentation). The specifications within this form include all modifications that have been approved by SCCA Pro Racing specifically for the vehicle model(s) and year(s) listed on this page. The parts, specifications and assemblies used shall be those for the unmodified stock vehicle, those permitted within the Pro Racing Regulations (PRR) and/or within this VTS. If the stock parts, specifications and/or assemblies exceed the performance potential of those approved within this form, then the parts, specifications and/or assemblies used shall meet those listed within this form. Refer to SCCA PRR for rules regarding all vehicle specifications not specifically listed within the VTS. Specifications regarding wheels and tires may be found in Article 3 and Appendix A of the PRR. Specifications regarding brakes may be found in Article 3 of the PRR. Appendix A will list what size restrictor to use if a restrictor is required to be run. When looking for the most current rules, go to and look under the Competitors section for latest Technical Bulletins, Participant Bulletins, and Appendix A. This Vehicle Technical Specification sheet is a permissive document. The exact configuration of any modification allowed within this VTS is subject to the approval of the TECHNICAL ADMINISTRATOR. Note: this form will have measurements in both U.S. Standard and Metric units of measure when practical. U.S. measurements will be in parenthesis. 1 11/01/04

2 1. GENERAL VEHICLE DESCRIPTION: A. Body Type (Sedan, Coupe, Hatchback): Coupe B. Engine Location (front, rear, mid): Front C. Drive Type: Front: Rear: X AWD: D. Wheelbase: 2515mm E. Induction Type (Turbo, Super, N.A.): N.A. F. Appendix A Competition Weight: See Appendix A G. Rear Weight Bias Percentage: See Appendix A 2. ENGINE: 2.A.1. OEM Engine Designation: Viper VGX V10 2.A.2.Displacement (Max): 8284cc / 505 cu in 2.A.3. Number of Cylinders: 10 2.A.4. Rev-Limit: Required: (Y / N) Y RPM See Appendix A 2.A.6. Method: ECU / Spark 2.A.7. Compression Ratio (Max): 10.0:1 2.A.8. Piston Stroke (Max): 100.6mm 2.A.9. Restrictors (teams are required to be prepared to install these restrictors): % of Reduction: 20, 25, 30, 35, 40 Hole Diameter (mm): 58.5, 56.6, 54.7, 52.7, A.10. Cylinder Firing Order: A.11. Direction of Engine Rotation (incl. cams): CW B. CYLINDER BLOCK: Part Number: AE 2.B.1. Cylinder Block Material: Cast Aluminum 2.B.2. Cylinder Bore (Max): 102.4mm *Note: Includes any allowed overbore, usually 1mm over stock. C. CYLINDER HEAD: Part Number: AC 2.C.1. Cylinder Head Material: Cast Aluminum D. VALVE SYSTEM: 2.D.1. Number of Valves per Cylinder: 2.D.1.a. Intake: 1 2.D.1.b. Exhaust: 1 2.D.2. Valve Head Diameter (Max): 2.D.2.a. Intake: 50.8mm 2.D.2.b. Exhaust: 40.1mm E. INTAKE PORT DIMENSIONS: 2.E.1. At Inlet Manifold Face (Stock): 2.E.1.a. Height: 55.9mm 2.E.1.b. Width: 30.5mm 2.E.2. Intake Port Work Allowed (Yes or No): No 2.E.2.a. Depth from Face: n/a F. EXHAUST PORT DIMENSIONS: 2.F.1. At Exhaust Manifold Face (Stock): 2.F.1.a. Height: 34.5mm 2.F.1.b. Width: 36.3mm 2.F.2. Exhaust Port Work Allowed (Yes or No): No 2.F.2.a. Depth from Face: n/a G. PISTON & CONNECTING ROD: 2.G.1. Connecting Rod Length (Axis Centerline to Axis Centerline) Stock: 158.0mm Approved: 158.0mm 2.G.2. Reciprocating Assembly(rods,caps,bolts,piston,rings,pin,clips, bearings) Stock: 1262g Min: 1262g 2.G.3. Aftermarket Rods Allowed (Yes / No): Yes Aftermarket Pistons Allowed (Yes / No): Yes 2 11/01/04

3 H. CAMSHAFT: Part Number: AD OR SCCA Profile#: 2.H.1. Rocker Arm Ratio: 1.73:1 2.H.2. Valve Actuation (direct action, etc.): Pushrod 2.H.3. Type of Cam Follower (roller, solid, etc.): Hydraulic Roller 2.H.4.Max Cam Lobe: I & E I. CRANKSHAFT: Part Number: 050AC 2.I.1. Mass (Stock): 38.5 kg with sprocket 2.I.2. Mass (Min): 38.5 kg with sprocket J. FLYWHEEL: 2.J.1. Stock Ring Gear Diameter: 365mm L. INTAKE MANIFOLD: Part Number: AD 2.L.1. Port at Cylinder Head Face (Stock): 2. L.1.a. Height: 54.6mm 2.L.1.b. Width: 29.2mm 2.L.2.a Allow Port Match to Head (Yes/No): No 2.L.2.b Depth: n/a 2.L.3.a Throttle Body Bore Diameter: 65.4mm 2.L.3.b Part Number: AC 2.L.4. # of Throttle Bodies: 1 2.L.5. # of Butterflies per Throttle Body: 2 2.L.6. Intake Manifold Material: Aluminum 2.L.7. Manifold Pieces: 1 2.L.8.a Intermediate Port Matching Allowed (Yes / No): No 2.L.8.b Depth from Face: n/a M. REQUIRE ENGINE SEALS LOCATION: 2.M.1. Valve Cover Seal #1: 2.M.2. Valve Cover Seal #2: 2.M.3. Oil Pan Seal #3: 2.M.4. Intake Manifold Seal #5: Left front inner valve cover bolt Right front inner valve cover bolt Left front corner oil pan bolt Drivers side # 5 cylinder bolt N. ENGINE MISCELLANEOUS: Engine shall be a sealed unit provided by Dodge: (p/n: 2005, 2006 & 2007 Model Year AA) All engine rebuilds must be performed by the official designee of Dodge Motorsports. Mahle pistons (p/n: AA) and Carrillo connecting rods (p/n: AA) may be installed by the official designee of Dodge Motorsports. The total weight of the reciprocating assembly must be equal to, or greater than, the minimum weight listed on the VTS sheet. 3. DRIVETRAIN: A. TRANSMISSION: 3.A.1. Number of Forward Speeds: 6 3.A.2. Manufacturer: Tremec 3.A.3. Gear Ratios: 3.A.3.a. 1st: A.3.b. 2nd: A.3.c. 3rd: A.3.d. 4th: A.3.e. 5th: A.3.f. 6th: A.4. Gear Shift Pattern / Gear Type / Engagement (synchromesh, dog-ring, etc.): H-pattern, Helical, Synchromesh or Dog Ring C. FINAL DRIVE: Axle Ratio: Primary: 3.07, Secondary: 3.31 / /01/04

4 D. DRIVETRAIN MISCELLANEOUS: Synchromesh gear engagement may be replaced with dog-rings. The specified shift pattern and gear type must be maintained. As of July 15, 2007, the 3.31 final drive may be replaced with the 3.36 final drive when when a replacement is needed. When a team changes to the 3.36 final, the 3.31 final may not be used again. The OE 5 th gear ratio (0.74) and 6 th gear ratio (0.50) may be used in lieu of the specified ratios. 4. SUSPENSION: 4.A. Suspension Type (Double A-arm, etc.): 4.A.1. Front: Double A-arm 4.A.2. Rear: Double A-arm 5. CHASSIS: 5.A. See Technical Department for information: 5.B. CHASSIS MISCELLANEOUS: Taxi-cab style vertical bulkhead shall be used. ABS is not permitted on full-prep cars. Replica headlight assemblies may be used due to the cost of the OE assemblies. Any replica must maintain the key design elements of the OE assembly, and look very similar to the eye from apx. 10-feet away. The key design elements of the OE Viper assembly are the chrome reflective area on the inner edge, the round headlight lens, the round turn signal lens, and the amber reflector area on the outer edge. Technical Passport chassis tag is located on the upper passenger door bar, back by the main hoop. The battery may be located in the rear hatch area behind the fuel cell and between the rear frame rails. Any chassis built after 01/01/2005 must have leg supports installed per PRR article BODY: 6.A.1 Stock Coefficient of Drag (Cd): A.2. Total Frontal Area: 2.4 m^2 6.B. Body Overhang (Measured from Axle Centerline): 6.B.1. Front: 1060 mm 6.B.2. Rear: 1195 mm 6.C. Stock Body Materials: 6.D. Maximum Body Width: 6.E. Permitted Rear Wing Design (GT class Only): Non-metallic composite (carbon fiber) 1979mm AA 6.D. BODY MISCELLANEOUS: Rear diffuser must have all strakes removed, except the outside panels. Remaining outside strakes must have 13.0mm trimmed from the bottom edge the entire length of the strake. 4 11/01/04

5 CAMSHAFT DATA FOR CAMSHAFT MANUFACTURERS VEHICLE: Viper Comp. Coupe (8.3-liter) LIFT DUR. OPEN CLOSE AREA Lobe(s) Intake BTDC 56.2 ABDC BTDC 45.9 ABDC BTDC 39.2 ABDC BTDC 34.1 ABDC BTDC 29.8 ABDC BTDC 25.9 ABDC BTDC 22.3 ABDC BTDC 19.0 ABDC ATDC 15.9 ABDC ATDC 12.9 ABDC ATDC 1.2 BBDC ATDC 15.2 BBDC ATDC 31.2 BBDC ATDC 54.3 BBDC PEAK LIFT --- LIFT DUR. OPEN CLOSE AREA Lobe(s) Exhaust BBDC 42.5 ATDC BBDC 31.8 ATDC BBDC 25.1 ATDC BBDC 19.9 ATDC BBDC 15.5 ATDC BBDC 11.6 ATDC BBDC 8.0 ATDC BBDC 4.6 ATDC BBDC 1.4 ATDC BBDC 1.7 BTDC BBDC 16.2 BTDC ABDC 30.8 BTDC ABDC 47.6 BTDC ABDC 72.0 BTDC PEAK LIFT --- World Challenge Permitted Cam Tolerances The camshafts used for this car must meet the specifications listed above within the following permitted tolerances; Duration at the seat ( ): +/- 6.5 degrees Duration on flank (0.1 lift 0.1 before max. lift): +/- 4.0 degrees Duration over nose: +/- 6.0 degrees Lift: +/-.005 (0.127mm) 5 11/01/04