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Spec Iron Rules 2021 1.0 1 ​

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Spec Iron Rules 2021 1.0 1 ​ Spec Iron Official 2021 National Rules (Rules subject to change) Nov. 30, 2020, Version 1.0 © 2013–2021 (Note: Latest revisions are in blue font and all previous revisions are in green) ​ ​ ​ ​ ​ 1. Introduction ​ ​ The American Iron Series is a series with 3 classes: Spec Iron (SI), American Iron (AI) and American Iron Extreme (AIX). The Spec Iron class (SI) is a road racing class under the umbrella of the American Iron Racing series which is a road racing series featuring American “ponycars”. The American Iron Spec Iron class was created to provide racers with the best value in amateur level road racing by combining the thunder and excitement of American style pony cars with the best possible reliability and durability of the racing platform, thereby minimizing total cost of ownership for racers. 2. Intent ​ ​ The SI rules are designed to ensure parity and optimum reliability by clearly defining allowed modifications. Success in competition will come via driving skill and fine tuning of adjustable parameters. Good sportsmanship is valued more than finishing position. This means clean, well-executed passing is to be a trademark of the series. Punting another competitor, or leaning on them to gain a position will not be tolerated. Car to car contact including bump drafting can result in an investigation and possible sanctions. Spec Iron Rules 2021 1.0 1 ​ Manipulating the race start, yellow flags or race results in an unsportsmanlike manner is also unacceptable and will result in possible sanctions. 3. Sanctioning Body ​ ​ The Spec Iron Series (SI) is supported and sanctioned by the National Auto Sport Association (NASA). All race events are governed by the rules set forth by the SI Directors and NASA officials. All competitors agree to also abide by the rules set forth in NASA’s current Club Codes and Regulations (NASA CCR) and any supplemental rules issued by the SI Directors. 4. Eligible Vehicles Manufacturers/Models/Configurations ​ ​ Eligible manufacturers, models, and base configurations are defined below. Additional combinations will be added in the future. a) 2005-2010 Ford Mustang 4.6L 3V V8 ​ ​ 5. Safety ​ ​ 5.1. Safety Requirements ​ ​ All safety requirements will follow NASA standards as detailed in the NASA CCR. Where the SI Rules and the NASA CCR’s differ, the SI Rules will supersede the NASA CCR. All vehicles and competitors must be outfitted with proper NASA CCR-compliant safety gear including, but not limited to: legal roll cages, fire suppression systems, harnesses, window nets, safety switches, and proper driver attire. 5.2. Class safety ​ ​ The NASA Chief Scrutineer or Spec Iron Series Directors may exclude any car from competition for any items that the Directors or Scrutineer deems to be unsafe. The Event Director may also exclude any car for modifications the Event Director deems to be illegal or unsafe. 5.3. Steering Wheel Lock ​ ​ Steering wheel locks must be removed. 5.4. Air Bags ​ ​ All air bags must either be removed or have the systems disabled. 5.5. Sunroofs/Moonroofs ​ ​ Sunroofs or Moonroofs made of glass must be either: a) removed from the vehicle during competition; or Spec Iron Rules 2021 1.0 2 ​ b) replaced by an acceptable covering such as sheet metal, composite or carbon fiber that is securely attached to the vehicle covering the opening. Metal sunroofs may be retained if additional fasteners are used to secure them to the vehicle. 5.6. Drive Shaft/Torque Arm Safety Loops ​ ​ A drive shaft safety loop is required to retain the front end of the drive shaft in the event of a universal joint failure. 5.7. Scattershield ​ ​ The installation of a scattershield or explosion-proof bell housing is not required but is highly recommended. 5.8. Masterswitch ​ ​ The installation of an electrical cutoff (Master Switch) is required and the switch must conform to the specifications set forth in the NASA CCR. 5.9. Fuel Safety Cell ​ ​ The installation of a fuel safety cell is not required but is highly recommended. If a fuel cell is installed, it must be installed and maintained in accordance with the rules set forth in the NASA CCR. 5.10. Fire Extinguisher/Fire System ​ ​ All cars must have a NASA CCR-compliant fire extinguisher installed in a manner that meets the requirements of the NASA CCR. The installation of an onboard fire system meeting the NASA CCR is not required but is strongly recommended 5.11. Convertible/T-top Cars ​ ​ Convertible cars are not allowed. 5.12. Roll Cage ​ ​ The roll cage must comply with the roll cage standards of the NASA CCR. However, the roll cage may also provide additional chassis stiffening by connecting the cage tubes to the chassis at points other than the main attachment points as defined in the CCR. The roll cage may NOT pass through the firewall. Interior body panels and sheet metal may be bent, removed, or altered to accommodate the roll bar design. 5.13. Door Safety Bars ​ ​ All vehicles must meet the door safety bar requirements found in the NASA CCR at Section 15.6.12 but gutting of the door beyond what is solely necessary to fit cage bars is allowed. 5.14. Seats ​ ​ Seats must be of a fixed-back competition type. No reclining seats are allowed. Spec Iron Rules 2021 1.0 3 ​ 6. Power, Weight and Dimensions ​ ​ 6.1. Power ​ ​ SI has a strict 11.75:1 (11.75 pounds of vehicle weight per each horsepower) horsepower to weight ratio and 11.25:1 (11.25 pounds of vehicle weight per each foot-pound) torque to weight ratio limit as measured at the rear wheels. All cars that compete in this class may have less power ​ and/or more weight than the specified ratios permit. 6.2. Weight ​ ​ The absolute minimum weight for SI cars is 3350 pounds with the driver. 6.3. Track Width & Wheelbase ​ ​ Vehicle Maximum Wheelbase Max Track Width ’05 -’10 Mustang, 4.6L 3V 108” 74.5” 6.4. Ride Height ​ ​ Minimum ride height is five (5.0) inches, to be measured with driver. Measurement to be taken at the lowest point of the rocker panel, but not to include welded seams or fasteners. This does not include exhaust, side skirts or other components. Rocker panels may not be modified from OEM. Isolated rocker panel damage may be corrected to prevent erroneous ride height readings. 7. Modifications ​ ​ 7.1. Permitted Modifications ​ ​ No part or component may be modified, removed, or disabled unless specifically permitted by these rules. Replacement parts must be original equipment manufacturer (OEM) for the eligible manufacturer/model/configuration defined in section 4, or the exact equivalent. Where aftermarket parts or parts kits are allowed, replacements must be those specific parts or components that make up the parts kit. 7.2. Tires/Wheels ​ ​ The Toyo Tire RR and RA1 in 275/35ZR18 are the only tires permitted. Tire shaving is permitted. No other tire modifications are permitted. (i.e. - no tire grooving or chemical tire traction treatments) Aftermarket wheels are permitted. Wheels may not be modified. Wheels Spec Iron Rules 2021 1.0 4 ​ must be 18x9.5 and must weigh a minimum of 26.0 lbs. The Ford Racing M-1007-S1895 wheel is strongly recommended. 7.3. Chassis ​ ​ The entire tub, floorpan, firewall, and frame assemblies including the cowl and windshield frame must remain stock except for the following modifications. 7.3.1 The rear floor pan area may be modified to enable the installation of a fuel cell. 7.3.2 The floor area and OEM seat mount posts may be modified to enable the installation of racing seat mounts. Seat mount bracing may connect to the roll cage. 7.3.3 The rocker area may be modified to enable the installation of a jacking pad or jacking rail. 7.3.4 Suspension mounting points may be reinforced by welding seams or by adding sheet steel along the OEM contours as long as the mounting points remain in the OEM stock location and maintain the OEM geometry. Reinforcements may not extend beyond 12” of the center of the mounting point. 7.3.5 The Ford Racing strut tower brace M-20201-S197 may be installed. 7.3.6 The Ford Racing front lower A-arm brace M-5025-A may be installed. 7.4. Body/Interior ​ ​ 7.4.1 Cars must have neat and clean appearances. All panels must fit properly and be free of sharp edges. All panels must be painted. No vehicle will be able to compete in more than one event with obvious body damage or unpainted body panels. 7.4.2 Acid dipping or body panel lightening is not allowed. 7.4.3 Only ’05-’10 Mustang V6 and GT model exterior body components, including front facias, front lip spoilers, rear spoilers, and rear wings are allowed. Body components from special edition models such as the California Special are not allowed. 7.4.4 Wheel opening lips may be rolled inward for the purpose of tire clearance but must maintain the OEM contour. 7.4.5 Exterior body trim pieces and antenna may be removed. 7.4.6 All vehicles must start with a minimum of two properly functioning rear brake lights within the OEM rear tail light assemblies. All other OEM light assemblies may be replaced with facsimiles, plates, covers, or mesh covered cooling duct openings as long as these maintain the stock external appearance. Replacements for recessed lights must also be recessed. Spec Iron Rules 2021 1.0 5 ​ 7.4.7 The grill and front bumper cover may have openings enlarged or added for the purposes of routing cooling air to allowed components.
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