CAR CONDITION & SPECIFICATIONS

ENGINE: The engine must be of the original type and specifications as homologated when the car was produced. Displacement, carburetion intake manifold and valve train must be original in specification, configuration, and material. HMSA will perform random testing of displacement, by bore and stroke dimensions or volumetric testing. The valve train MAY be inspected via scope. The valve train will be inspected to verify that non-roller lifters and non-roller rocker arms are fitted where applicable.

WHEELS: Cars must run on wheels of the same type and size as were made available from the manufacturers at the time of production, aftermarket equivalents of period design are acceptable. We refer specifically to rim width, diameter and off set as specified in the manufacturer homologation statement. A maximum of .5" increase in rim width is allowed. In certain instances for safety reasons the offset of wheels may be altered. Requests should be made to the HMSA office in writing. Wheels must be free of cracks and faults. Have them crack tested bi-annually at a minimum. Spokes must be properly tensioned.

Bolt on Rudge Whitworth Spline adapters must have a paint strip on their retaining fasteners indicating the adapters are secure.

BRAKES: Dual brake circuit master cylinders are recommended.

BODY: All body panels must be of the original material type and adequately fastened. Body modifications from original such as contemporary flares, body ventilation holes, spoilers, splitters and/or air dams will not be accepted.

ADVERTISING ON CARS: Only historically correct markings are acceptable. Modern advertising is not allowed. Example: anything.com is modern. Any advertising that was not in existence at the time of production of your car is considered modern advertising.

PRESENTATION: Cars must be presented in a neat and finished condition. Engine compartment, suspension, chassis and drive line must be clean enough to facilitate inspection. Cables, wires and hoses must be taped or otherwise secured to prevent chafing, etc.

CATCH TANKS: A securely fastened radiator catch tank with a minimum capacity of 1 qt. is required. An additional catch tank should be fitted on engine oil breathers where practical. Cars showing indications of oil loss through their breather system will be required to fit a catch tank. No oil, fuel, water or fluid leaks of any kind will be tolerated.

COOLANT: Use of water rather than coolant is required. Glycol based coolant is not allowed. Water wetter type products are allowed.

THROTTLE RETURN SPRINGS: A minimum of two (2) system external return springs are required in addition to the original overall system linkage spring. Springs on/in the body of carburetor do not count as external return springs. Fuel injection systems must have a backup (secondary) return spring in addition to the overall system spring. Primary springs can not share the same mounting point with back-up springs. Each external spring requires a separate mounting point unless approved by an HMSA Tech official.

SEAT BELTS: All cars equipped with a roll bar must be equipped with racing type seat belts of nylon web, at least 2" in width lap belt. Both lap and shoulder belts having metal to metal buckle. Belts must be securely mounted to the frame. Replacement is required at manufactures expiration date or 5 years from date of manufacture whichever occurs sooner. All belts must have an SFI or FIA label with the manufacture date or expiration date affixed to the belt set. IF THEY DO NOT, THEY ARE VOID AND MAY NOT BE USED.

SHOULDER HARNESS: If shoulder harnesses are used, they must not be a “Y” type belt type. It is highly recommended that each shoulder harness have its own mounting point for each shoulder belt. If a Head and Neck protection system is used, 2" shoulder belts are allowed otherwise, 3” belts are highly recommended. Replacement of belts is required at manufactures expiration date or 5 years from date of manufacture which ever occurs sooner.

ROLL BARS: Roll bars are very strongly recommended. FIA or SFI spec high density foam is strongly recommended in areas which the driver may make contact in the case of an incident.

MIRRORS: Very useful! At least 1 rear view mirror with a minimum area of 8 sq. inches is required.

WINDOW NETS: If the car is fitted with a window net, it must be used.

FIRE EXTINGUISHERS: All cars must be equipped with a 2 lb., 10 BC (or Halon equivalent) fire extinguisher securely mounted with a metal bracket and metal retaining strap, plastic brackets and retaining straps are not acceptable. Hand held extinguishers should be within reach of the driver. An onboard fire system is strongly recommended. If so fitted, verified by a gauge or other method, that they are full and operational prior to each event.

ELECTRICAL CUT-OFF SWITCH: It is recommended that each car have a master electrical cut- off switch fitted outside the car and be clearly marked. ALL terminals and connections are to be covered with an insulating material.

FUEL CELLS: are strongly recommended. If a fuel cell is used it should be an approved soft bladder type not a rotational mould plastic box. Fuel cells must be securely mounted to the car in a metal containment vessel. All fuel cell bladders must have foam inside. It is highly recommended that Fuel Cells be inspected annually for signs of bladder and foam degradation. Fuel cell bladders have a specific usable lifespan from date of manufacture, consult your cell manufacture for your cells recommended lifespan.

FUEL CELL CHECK VALVE: If a fuel cell is used, a one way check valve in the vent must be used. The check valve tube must be vented to the exterior of the car.

ALL FUEL FILLER CAPS: Must be securely fastened so as not to open on impact. Monza type (quick release) caps must be wired shut.

A FIREWALL: Must exist between the cockpit, engine and fuel tank. It must be free from holes. Selected Formula cars excluded.

UNDERTRAYS: Must have drain holes.

SUSPENSION PARTS: It is strongly recommended that suspension parts and steering components be crack checked bi-annually. Three of the most common methods of inspecting material integrity are; Magnetic particle inspection, chemical dye - penetrate and x-ray. No part of suspension shall have excessive play. Any suspension part installed and secured in single shear, particularly spherical rod ends (Heim joints), must include a captive washer of sufficient diameter to retain the entire component at the mounting point. Suspension mounting points are to be in the original position and location.

STEERING: No part of the steering assembly shall have excessive play.

BRAKE SYSTEM: Brakes, lines, fluid, pedals must be in good operating condition. Dual brake circuit master cylinders are recommended. Brake calipers are to be as originally fitted to the car, in piston bore size and manufacturer. Drilled, slotted, 2 piece and or vented brake rotors are not allowed unless originally fitted to the vehicle at time of manufacturer. If the rotors are vents as OEM, the venting may not be directional.

BRAKE LIGHTS: All cars must be fitted with at least one brake light in working order. Open wheel cars are exempt from having brake light(s).

CAMERAS: The mounts for video / photographic cameras shall be of a safe and secure design. All cameras, including “Go-Pro type”, must have a secondary method (tether) for retaining the camera body, not the camera mount, to the vehicle. Cabled Lipstick cameras are exempt. All cameras must have a camera tech sticker affixed for each event.

Any cameras mounted to the exterior of a car with anything other than a solid mechanical connection shall have a secondary tether. (Cameras mounted with suction cups, Velcro, and/or tape will require a secondary tether.) Additionally, camera mounts with plastic arms shall have a secondary tether. Helmet-mounted cameras shall not be allowed.

DRAIN PLUGS: All drain plugs must be safety wired. In certain cases, where it is virtually impossible to wire the sump plug, the tech inspector may approve a paint stripe.

BATTERIES: Must be securely fastened down. All of the positive electrical contacts, connections and terminals i.e. battery, regulator, generator, alternator and some starter terminals must be covered with an insulating material to prevent grounding. Batteries located in the cockpit must be in an enclosed, covered container or have leak/spill proof caps.

CAR RACE NUMBERS: All event numbers will be assigned. Numbers should be 2" - 3" in width and 14" - 15" in height and in a contrasting color from the background.

TOW HOOKS: It is required that all cars have an eyebolt or equivalent front and rear to attach a tow cable. The location point must be clearly marked.