Car Preparation
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It is our desire to see cars restored to their original condition and specifications. That is to say, to the same state as when it was originally produced. Only original racing options that were homologated (allowed at that time) for that model car are allowed.

We wish to establish a clear understanding of the "point in time" (i.e., 1932, 1965, 1967) to which a car is restored. Modifications which are not in keeping with that "point in time" are not allowed. Modifications which improve a car's performance and are beyond the stated "point in time" are not allowed. Non period modifications such as modern valve train replacements (roller rockers, etc.), blocks, gearboxes, vented discs and aftermarket/non period brake calipers, traction control like devices, spoiler or splitters etc. are not acceptable!

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 noses must be taped or otherwise secured to prevent chafing, etc.

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ENGINE: The engine must be of the original type and specifications as homologated when the car was produced. Displacement, carburetion and valve train must be original in specification and material. HMSA will perform random testing of displacement, by bore and stroke dimensions or volumetric testing.

WHEELS: Cars must run on wheels of the same type and size as were made available from the manufacturers at the time or the equivalent. 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.

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 3" in width lap belt and at least 2" in width shoulder belts, with 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 which ever occurs sooner. All belts must have a manufacture identification or expiration date affixed to the belt set.

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 harness. 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 densityfoam is strongly recommended in areas which 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.

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. 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. All fuel cell bladders must have foam inside.

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 excepted.

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 he mounting point.

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

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).

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.

TIRES: The BASIC TIRE RULE governing acceptable tires for each car:
Tires must approximate as closely as possible the dimensions of the tires originally available on the car at the time of manufacture. This refers specifically to diameter, cross section and tread width. (The size indicated on the side of some current tires does not mean that the dimensions of the tries are the same as an original tire with the same listed size). Hoosier Speedster tires are not acceptable.

TREAD PATTERN: All tires must have a tread pattern of period design. If hand grooved, the tire must have the correct number of grooves as originally grooved by the supplier/manufacture, i.e. Avon historic pattern.

COMPOUND: Tires must be of a manufacturers "Hard" compound.

CLASS TIRE REQUIREMENTS are listed. There may be some individual tires that may also approximate original tires for a specific car. These might include a 70 series radial tire. A request to use such tires will be considered if they are truly appropriate.

CLASS TIRE REQUIREMENTS

Class	Car Type	Tire
A-1	1900-1926 Sports & Racing Cars	FREE
A-2	1927-1939 Sports Cars	FREE
A-3	1929-1939 Racing Cars	Dunlop 204 L/Blockley
A-4	1946-1954 Grand Prix Cars	Dunlop 204 L/Blockley
B-1	1947-1955 Sports Cars (GT)	Dunlop 204 L/Blockley
B-2	1947-1955 Sports Racing Cars Under 1500cc	Dunlop 204 L/Blockley
B-3	1947-1955 Sports Racing Cars Over 1500cc	Dunlop 204 L/Blockley
C-1	1955-1960 Sports Racing Cars Under 2000cc	Dunlop 204 L/Blockley
C-2	1955-1959 Sports Racing Cars Over 2000cc	Dunlop 204L/Blockley/Michelin Pilote X
D	1959-1965 Sports Racing Cars	Dunlop 204L/Dunlop 204M/Goodyear
E-1	1955-1957 Formula I-II	Dunlop 204 L/Blockley
E-2	1958-1963 Formula I-II	Dunlop 204 L
E-3	1958-1963 Formula Jr.	Dunlop 204 L
G-1	1955-1961 GT Cars Under 2000cc	Dunlop 204L /Goodyear /Hoosier*/Avon*
G-2	1956-1962 GT Cars Over 2000cc	Dunlop204L/Goodyear/Hoosier*/Avon*
G-3	1962-1965 GT Cars Under 2000cc	Dunlop204L/Goodyear/Hoosier*/Avon*
G-4	1963-1965 GT Cars Over 2000cc	Dunlop 204 L/Goodyear/Hoosier*
i	1965-1972 FIA Makes Championship Cars	Goodyear /Avon /Hoosier
T-A	1966-1972 Historic Trans-Am Cars	Goodyear 600x15 / 700x15

* = Hoosier Vintage TD upon Approval

RULES PERTAINING TO PRODUCTION CAR CLASSES:
G-1, G-2: 1955-1962
G-3, G-4: 1962-1966
Interior: Interiors are to be installed and as original fitted by the manufacturer.
1) Modifications to the interior that reduce the weight of the car are not allowed, with the following exceptions:
a) Floor mats or rugs may be removed.
b) Window glass may be removed from doors.
2) The removal of interior trim (gutting) is not permitted.
3) The cars must have 2 seats (original and/or period bucket seats is allowed), original dashboard (you may exchange or add instruments), interior door panels.
4) Installed safety equipment may not have any influence on the mechanical performance of the car.
Exterior:
1) Tops may be removed from open cars. Soft tops are not allowed.
2) Bumpers may be removed, but if so, all projecting hardware such as brackets must also be removed.
3) Grills may not be removed.
4) Windshields may be replaced by a suitable windscreen.
5) Lighting equipment must remain in place.
6) Headlights and other glass lenses on the vehicle should be taped.
7) All exterior trim must remain in place.
8) Window frames must remain in place.
Brakes:
Must be of the original type and specifications as homologated when the car was produced. Steel braided brake lines are allowed.
Engines:
Must be original as stated in the general HMSA rules. Modern valve train replacements such as roller rockers, roller tip rockers, titanium valves, etc. are not allowed. Dry sump systems that were not originally fitted to the specific car are not allowed. Headers are allowed.
Transmission, Clutch & Differential:
Must be of the original type, as produced by manufacture. No after-market cases or internal gear sets unless they are of the same OE type replacement. Gear ratios as originally offered.
Minimum Weight: The minimum weight allowed is that listed in the SCCA Rule Book, Production Car Specifications, 1962 for G-1 & G-2 and 1965 for G-3 & G-4, less 7%.
Ignition: Points or internal electronic triggering of a coil is allowed. No external spark enhancement devices are allowed unless produced and allowed originally in the point of time for the car's acceptance date. No device may be attached to the system which results in traction control.

RULES PERTAINING TO:
HISTORIC WINSTON CUP CARS
Car Verification and eligibility:
Only cars that actually competed in NASCAR’s Grand National or Winston Cup events thru 1990 are eligible. Later cars may on a per event bases, be accepted based on application. Evidence must be provided to support such participation. Cars must be carefully prepared and presented to “a point in time”. (see car preparation). Cars will be inspected, weighed, and verified at the first 2 events of the year. Any deficiencies will be noted, and MUST be brought into compliance before the participant’s next planned event. Each car will receive an annual ‘compliance’ sticker. This does not replace the tech inspection at each event, but is, initially, supplemental to it.

Car preparation:
Cars presented for entry must be homogenous with respect to body design, paint and graphics, and mechanical components. Chassis, and body configuration and engines must be form the same year.

Cosmetic preparation:
Cars must be consistent in appearance with the year in which they ran in NASCAR. Paint and graphicsshould reflect the “point in time” year stated. Historic photos or other archival documentation is required.

Safety preparation:
Proper driver attitude and conduct are essential to on-track safety, and are covered elsewhere in the rules. With respect to car preparation, an adequate, and working, 3-nozzle fire system is required, with an engines, driver, and fuel tank nozzles. Visibility in these cars is often limited, thus, 3 mirrors (left, center, right side) are required. In the interest of visibility, modern seats with large, wrap-around head restraints and/or center restraint nets are not allowed.

Brakes:
In an effort to equip all cars with similar braking power, front brakes calipers are limited to 4 (four) pistons each, and must be of a make and model available to the year as determined by the “point in time” selected for of your car. The addition of modern brake components is not allowed.

Wheels and tires:
Wheels must not exceed 15 inch diameter or 10 inch width. Tires are specified as Goodyear Stock CarSpecial-bias ply-(part number 1372) unless otherwise noted.

Vehicle weight:
Vehicles must weigh 3400 pounds, without driver.

Engine preparation:
This is not the place to test your’s, or your motor builder’s talents and expertise. Engines must be configured and prepared exactly as they were for the “point in time” year of car. Displacement is limited to 358 cubic inches. All cars are subject to displacement verification (“pumped”) and random checks will be done. Carburetor is a single Holley 850 cfm on a period-correct (“point in time”) manifold. Cylinder heads: Chevrolet-up to and including “18 degree” cylinder heads of a design and manufacturer consistent with the year of car they are in. Pontiac- “867” cylinder heads. Ford-Ford “C-302” and early “Yates” heads.

RULES PERTAINING TO:
80’s TRANS-AM and IMSA GTO Group

This group is being formed to showcase 1980-1991 IMSA GTO and 1980-1991 SCCA Trans-am cars. The cars of this era represent a significant piece of Motorsports History. Our mission is to encourage restoration and preservation of this group of cars. The objective is to provide an opportunity to,” Let your car be the star”. There are a lot of fans who want to see these cars race. There is the expectation that the cars are to be prepared period correct. It is important to race and show the cars as they were, not as what they could be; modified with the latest technology. The drivers are not the focus, it is the cars. This has been said before but it is very appropriate,” The history of these cars has already been written”. We want to give you an opportunity to present it.

Group Guidelines
1. The cars must have history of competition in either IMSA GTO or SCCA Trans-am or both. To be considered the car must have run at least four races at four different tracks in one season. A DNF counts as long as the car qualified for the race. The four races can be a combination of Trans-am and IMSA GTO events. The entrant will be responsible for submitting a “Line of Race History”, to be considered for entry in events.

2. The car will need to have a verifiable continual chain of ownership. The owner must be able to prove the heritage from the year the car was built to present day. The owner will need to state the point in time the car is restored to, and who was the driver at that time. Proof will be in the form of period race photos, chassis number, year of construction, and the name of chassis builder. Additional proof can be documents from prior owners or drivers, magazine articles, race results, etc.

3. The car must present well. Current photos should show to what “point in time” it is restored. It can be a nicely restored car or a significant survivor with a patina of age.

4. The “point in time” is defined as: the car is correctly restored to as first raced or restored to a special event in its history, such as having won its class at Daytona. In such a case, for example, it is possible that a 1984 chassis car might be configured and painted as run in the 1988 Daytona 24 Hour . The car will need to have period correct paint scheme, graphics, decals, wheels etc. Current sponsor decals or graphics will not be allowed.

5. The cars will be correct as to engine size, weight, wheel size, brake rotor diameter, differentials, roll cages and so on. No modifications are allowed. No Radial tires are allowed. All tires used will be Bias ply hard compound construction. The car is expected to meet the rules from the series and the year to which it is restored.

6. The issue of engine size, horsepower, and weight of the cars are going to make it difficult to strike a balance, as this group covers a number of years spanning two different series. As such the group will be looking to create balance by requiring the drivers to race their cars in such a way as to provide a good show for the spectators. It is expected that no driver or drivers will run away from the pack. Close racing with passing is expected. There should be groups of cars racing together. A fast group of 4 or 5 cars switching spots for 20 minutes is a great crowd pleaser and will assure future invitations to the best race events, for these historic cars. This group will be made up of a diverse group of drivers with different levels of experience and talent. These are cars that require a certain level of skill. The drivers are expected to have the experience, competence and common sense to drive one of these cars safely. If you are found to be driving in an unsafe manor or if you do not adhere to the philosophy of the group, the group will take appropriate action. If you can not agree with this type of philosophy, then this may not the race group for you. The objective is to promote a race group where entrants will bring out very significant cars and feel comfortable racing at their level and sharing their car with the public as the cars were intended. The goal is for the spectators to come to the paddock and tell us what a great close race it was, just like it was back in the day.

7. Points to consider before restoring or purchasing a car are 1) be sure of the cars, “Line of Race History” and its “Chain of Ownership”. Be sure to consider Noise Restrictions at future events. Many tracks and events already set a limit at 103 db.

RULES PERTAINING TO:
1971-1979 Fromula Atlantic

Years of eligibility:1971 – 1979
The overlying principle is that all cars must be period correct.
Approved engines (basically saloon car steel block):
Alfa t/c; BMW 1.6 SOHC; Fiat 124 DOHC; Datsun 1600 SOHC; Cosworth BDA & BDD
Ford, 1500, 1600 pushrod t/c Porsche 1582cc Renault 1600cc TS
Maximum bore: 81.5mm (1606cc)
Stroke: 77mm
Oversize engines will be addressed on a case by case bases.
Fuel Injection not allowed
Minimum weight 1050 lbs (If using an aluminum block the minimum weight will be 1110lbs)
Max 5 forward gears
No ground effect side skirts allowed
No ground effect tunnels
Wings original positions, same type (element number) period profiles
Front wings
Front wing leading edge airfoil radius =.6" (1.5cm).
Bodywork or aerodynamic devices (wings) in front of the front tires shall not exceed 59.055" (150cm).
Rear wings
Rear wing width = 110cm - 43.307"
Rear wing set-back = 39.4" from CL of rear wheel to end of rear wing
Rear wing height = 34.5" measured on a horizontal plane from the ground w/o driver
No Carbon/Kevlar composite body panels
Shocks: Non-pressurized shocks maybe double adjustable 8212 KONI or Bilstein
Pressurized shocks shall be non adjustable
No remote reservoir allowed
Tires: No radials
Goodyear, Hoosier or Avon slicks