It's a "hit or miss" linkup on the site that I got this from, but I thought some of the members might like to look at what the official rules were for the 2002 USAC Silver Crown series, so I copy and pasted the whole thing from the Official USAC web site archives.
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Appendix B
2002 Silver Crown Championship Division Technical Specifications
201 Design and Construction
All phases of design and construction are subject to the approval of the Technical Director. The Chief Steward and the Technical Director may exclude any car, design or construction, which they deem unsafe or not meeting the specifications, the spirit and/or the intentions of the rules contained herein.
202 Inspections
A. All parts indicated on the USAC inspection forms must be tested by the appropriate non-destructive testing techniques in accordance with the USAC Non-Destructive Testing Manual. This inspection shall be performed by an approved USAC inspection station prior to the start of each year's racing season.
B. Decorative chrome plating cannot be used on any parts requiring magnetic inspection.
C. A copy of the USAC inspection form, properly completed and executed, must be filed at the office of the Director of Competition before a car may be entered in competition.
D. A copy of the USAC inspection form, properly completed and executed, must be carried by the entrant or crew chief and must be available for examination by the Stewards or Technical Committee.
E. The United States Auto Club may require additional inspections during the season.
203 Dimensions and Weight
A. The wheelbase must be at least 96 inches. (See Illustration)
B. The overall length will be limited to a maximum of 15 feet.
C. The tread must be at least 47 inches.
D. The overall width will be limited to a maximum of 80 inches. (See Illustration)
E. The maximum offset allowed, for both front and rear wheels, is 4-1/2 inches (9 inches overall) measured from the centerline of the chassis to the inner wheel bead seat. The outside bead seat of the right rear wheel cannot exceed 44 inches from the centerline of the rear axle center section. The outside bead seat of the left rear wheel cannot be less than 31 inches from the centerline of the rear axle center section. The outside of the right front wheel cannot be farther out than 44 inches, measured from the centerline of the chassis.
F. All cars must weigh a minimum of 1,500 lbs. including water, oil and fuel without the driver. Cars may be weighed prior to and/or following any event. Cars weighed at the completion of an event may not add fuel and/or ballast to satisfy the minimum weight requirement.
Any ballast used must be securely bolted within the confines of the frame tubes, no farther than 16 inches forward of the front engine mounts and no further rearward than the engine plate (firewall).
204 Car Construction
A. All cars shall be rear drive only. The engine, driveline and rear axle center section must be mounted on the chassis centerline. Only torque tube type drivelines, utilizing only one u-joint, will be allowed. The engine must be mounted in a vertical (level) position. All cars must be equipped with a drive shaft restraining hoop securely attached to the chassis. Minimum hoop material is one inch X.095 steel tubing. Radius rods may not be attached within the confines of the cockpit.
B. The driver shall be seated directly behind the engine and on the centerline of the chassis. The cockpit opening must be at least 500 square inches, measured on a plane parallel to the ground and level with the uppermost point of the body or windscreen.
All cars must have an aluminum guard behind the driver extending from the front of the step in the tail tank to the floor pan. This guard must extend the full inner width of the frame.
C. All body panels must be readily removable. Body panels rigidly attached to the frame to prevent chassis flex will not be permitted.
D. The nose assembly may not be wider than parallel lines of the body and may not exceed the width of the frame. All cars must have a forward facing radiator opening, located between the main frame tubes, with a minimum of 56 square inches. The nose may not extend forward beyond the confines of the front bumper.
E. The engine must be covered with a cowling or hood secured in place. The hood or cowling need not enclose the sides of the engine. Side panels that include exit ducts may not extend more than 5 inches from the frame rails and may not extend past the front engine plate. These ducts must start behind the front axle. Vertical spill plates may be used on the outer edges of the hood and can be a maximum 2 1/2 inches in height. The outside dimensions of these spill plates can not be wider than 24 inches at the front and 30 inches at the rear of the hood. The sides of the frame must be covered from the firewall to the leading edge of the seat. Forward facing scoops must be within the confines of the main frame tubes
F. Right side cockpit panels may be a maximum of 36 inches high as measured from top of the bottom main frame tube at the motor plate and projected rearward. Left side cockpit panels may be 30 inches high as measured from the top of the bottom main frame tube at the motor plate and projected rearward. Any hood or cowl panels higher than 36 inches from the top of the bottom main frame tube may not extend rearward past a point 28 inches forward of the rear vertical (or most forward) roll cage tube.
Side panels cannot extend rearward past the rear diagonal roll cage tube or brace.
G. All cars must have a floorboard or underpan, utilizing aluminum or an equivalent alloy, extending from in front of the engine to a minimum of six (6) inches behind the leading edge of the seat. Underpans or floorboards must be bolted to the chassis in the cockpit area. Underpans may not extend rearward past the leading edge of the rear axle. The underpan or car bottom must be flat from side to side without any aerodynamic aids. Horizontal panels must not extend below the plane of the underpan. It is recommended that a fireproof absorbent pad be used under the engine.
H. Sun visors are limited to 7 inches from top to bottom including any tabs, extensions, etc. and cannot be wider than the cage. Sun visors cannot extend above the cage. For fan recognition, it is recommended that all teams place the drivers name on their visor in large letters.
I. Airfoils, wings, spoilers, or other aerodynamic appendages will not be permitted. The Chief Steward or the Technical Director may have any panel or part removed which in their opinion is not within the spirit or intent of this rule.
J. Oil tanks, water radiators, oil coolers and any remote engine accessory must be within the confines of the main frame tubes. Oil tanks mounted forward of the firewall must be behind the front axle and forward of the front engine mounting plate. Oil tanks mounted behind the engine plate/firewall may be mounted outside the main frame providing they do not protrude more than eight (8) inches from the main frame tubes. Cylindrical oil tanks mounted outside the frame, behind the engine plate/firewall, must be mounted as close the frame as practical. For the purpose of this rule, the main frame tube will be considered a straight line between the front and rear attachment point.
K. Flip-type fittings are not permitted on any tank or container carrying liquids. The coolant system must incorporate a catch tank or closed system to prevent spilling of coolant.
L. Rear view mirrors are not permitted.
205 Roll Cage
A. All cars must have a roll cage that is integral with the frame and does not encroach upon an imaginary cylinder, 20 inches in diameter, extending through the top cockpit opening directly above the seat. The roll cage must be adequately braced fore and aft, and side to side, to secure it in an upright position in case of rollover. The roll cage should extend four inches above the driver's helmet when seated in the driving position.
B. Roll cages are required to be constructed of SAE 4130 steel tubing with a minimum O.D. of 1-1/2 inches and a minimum wall thickness of .095 inches. The roll cage must be gusseted in all four corners. Cars constructed after 1/1/97 must have tubular gussets attached a minimum of 2 inches from the centerline of the angle being gusseted. Tubular gusset material must be 11/16" O.D. x .095 wall thickness or 7/8" O.D. x .065 wall thickness. Roll cage gussets should be constructed as shown in Illustration 1.
C. No water or oil coolers are to be placed above or beside the cockpit opening.
206 Fuel System
A. A conventional tail tank, fuel cell and the fuel contained must be carried on the centerline of the chassis and be located behind the driver. Tail tanks must be constructed of either an approved plastic or aluminum. Carbon fiber, Kevlar or other composite construction is not allowed. The conventional tail tank shape cannot be modified. Only approved factory supplied relief panels may be used. Axle cut outs are not allowed. No spill plates, skirts or air deflectors may be attached or used to aerodynamically enhance the tail tank. The maximum width of the tail tank is 24 inches.
The tail tank must be constructed and supported in a manner that will insure every precaution has been taken to avoid rupture or breakage.
The maximum capacity of the tail tank assembly will be 75 U.S. Gallons. The minimum capacity tank allowed is 59 U.S. Gallons.
A protective cover may be used on top of the tail tank providing it is no more than 9 inches in height, 12 inches in length and not wider than the top (head rest) of the tail tank.
B. Fuel tanks may not be mounted to the chassis utilizing any portion of the access plates or the nut plates bonded i nto the fuel bladder. The lower access cover for the fuel cell is not permitted to be a casting. An aluminum plate (3/16" thickness) may be used to seal the opening in the bladder itself, and a malleable material such as aluminum (minimum .062 thickness) may be used between the aluminum plate on the access door in the fuel cell and the mounting area to the tank. One-piece aluminum plate access covers are permitted but must be a minimum 3/16 (.1875) thickness.
C. All fuel systems must have a mechanical fuel shut off located at the main exit of the tail tank. The actuation cable for this valve must be located at the left side of the chassis within easy reach of the driver and safety personnel. The Technical Director must approve all valves used.
Cars utilizing rear inboard brakes must have a steel plate mounted to the bottom of the fuel tank directly above the brake rotor. This plate must be of adequate size to add protection to the lower portion of the tank. Stainless steel of a minimum .100" thickness is mandatory.
D. The fuel tank must have an adequate supporting structure under the forward section of the lowest portion of the tank. This structure must follow the contour of the tank and be welded or securely attached to the frame of the car on each side.
E. All mounting points between the tail tank and the chassis must have inner and outer plates attached to the tank shell. These plates must be of adequate size to insure the tank being secure to the chassis.
F. A flush-type cap is mandatory. The top access cover must be installed in direct contact with the fuel cell.
G. The tank vent must have a check valve.
H. Fuel pumps may not be mounted within the confines of the cockpit.
I. The engine must be equipped with a shut-off device located within easy reach of the driver.
J. All cars must be equipped with a fuel cell and tail tank meeting the requirements of USAC and SFI Specification 28.2.
207 Firewalls
An effective firewall of metal at least 0.0625 inch thick or other approved fire retardant material must be installed between the engine compartment and the cockpit. It must be as leak proof as practical.
208 Revolving Parts
A suitable guard must shield all revolving parts inside the cockpit.
209 Bumpers
A. The car must be equipped with a rear bumper securely fastened to the structural components of the chassis.
B. The bumper should follow the contour of the tail and have adequate clearance to permit moving the car by the bumper.
C. The height of the rear bumper, when the car is in a normal position fully loaded must be at least as high as the center of the front wheel.
D. Single tube type bumpers must be constructed of SAE 4130 steel tubing with a minimum of 1.250 inch O.D. and 0.095 inch wall thickness. Multiple tube, basket style bumpers must be constructed of SAE 4130 steel tubing with a minimum 1.0 inch O.D. and 0.083 inch wall thickness.
E. It is recommended all cars have a tubular front bumper with a minimum O.D. of 3/4-inch, extending forward not more than 23 inches from the leading edge of the front axle. Bumpers must be constructed so as not to cause a safety hazard.
210 Nerfing Bars
A. All cars must be equipped with rear wheel nerf bars. The right rear nerf bar cannot extend beyond the outside edge of the right rear tire when the right rear tire is set at maximum offset.
B. Nerf bars must be constructed from 4130 or equivalent tubing having an O.D. of one inch and a minimum wall thickness of .065 inch and a maximum wall thickness of .120 inch. A maximum of three horizontal and/or three vertical tubes are allowed in the construction of nerf bars. No ballast is allowed in the nerf bar tubing.
C. With the exception of the exhaust system, no components or accessories may be attached to the nerf bar assembly.
211 Steering and Suspension
A. The steering mechanism must be engineered and assembled in accordance with sound engineering principles.
B. All highly stressed steering and suspension parts must be made from SAE 4130 steel or an alloy, specified by the manufacturer of the alloy as equivalent in physical properties.
C. All such parts must be heat treated (including stress relieving, normalizing, annealing and hardening when applicable) after forming and/or welding as recommended by the manufacturer of the alloy being used.
D. Parts may not be joined by brazing, soldering or by dissimilar metals.
E. All steering and suspension parts that are electroplated must be oven baked at a temperature of 375 degrees Fahrenheit, plus or minus 25 degrees, for a period of not less than three (3) hours after plating.
F. Parts that have been stripped of plating must also be baked according to the specifications in 211 (E), unless the parts are to be reprocessed within a three (3) hour period.
G. Shot peening is recommended for all highly stressed parts. Authorized facilities should be used.
H. The steering wheel hub must be padded with a resilient material of not less than three-fourth (3/4) inch thickness.
I. Removable steering wheels incorporating a quick release mechanism conforming to SFI Specification 42.1 are mandatory. Pip pin type mechanisms are not allowed.
J. Shock absorbers must have all valve mechanisms housed in a single cylindrical unit. Shock absorbers may have only one external adjustment and may be adjusted remotely only by manual methods. Shock absorbers cannot operate or be adjusted electrically.
K. The use of carbon fiber or other composite material as a suspension component is not allowed. Carbon fiber torque tubes are prohibited.
212 Axles
A. Independent suspension is not permitted. The car's axles connecting the wheels must be of one-piece tubular construction without the capability of camber or independent castor adjustment to the wheel assembly. Offset kingpin bushings are allowed. Any other construction will be considered as independent suspension.
B. Axle spools attached by the coping method must have the axle wrap around the spool at least two thirds of the spool diameter. Gusset plates are recommended on all spools.
C. All front axles must be constructed of SAE 4130 steel or a steel alloy equivalent in structural strength. Titanium axles are not permitted.
D. The rear end gear assembly must be of conventional design with only one set of spur gears located behind the ring and pinion.
213 Wheels
A. The number of allowable wheels is restricted to two (2) front wheels and two (2) rear wheels only on each car.
B. The rim diameter must be 15 inches.
C. The rim width for front wheels is limited to a maximum of ten (10) inches. The rim width for driven wheels is limited to a maximum of eighteen (18) inches on the right rear and a maximum of fourteen (14) inches on the left rear.
D. FOR DIRT EVENTS ONLY, - right rear tire and wheel assembly
E. A USAC approved tire bead locking device must be used on the outer bead seat of the. Wheel assemblies, which utilize a separate wheel cover that attaches to the wheel, must have a register that is continuous with the outside diameter of the wheel cover to prevent slippage. The cover must be securely attached to the wheel assembly at a minimum three positions. Small bolts or sheet metal screws will not be acceptable. Access holes in the center of wheel covers may be plugged or covered with a soft material such as a plastic plug with a register.
F. All wheels are subject to the approval of the United States Auto Club. Wheel manufacturers shall submit a certified test report from an independent testing laboratory approved by USAC, showing dynamic radial fatigue, dynamic cornering fatigue test and minimum burst test. All tests must meet or exceed USAC specifications.
G. All wheels must be inspected at least annually by the appropriate non-destructive testing techniques in accordance with the USAC Non Destructive Testing Manual.
H. For all pavement races, the use of splined right front hubs/wheels will not be allowed. Any car using a lug type right front hub must use all six lugs. A 360-degree pressure plate of either 1/8" steel or 3/16" aluminum must be used between the lugs and the wheel face.
I. Direct mount or spindle mount wheels are not allowed on the right front at pavement races.
I. The use of full-face brake scoops/wheel covers on the inside bead of wheels is not allowed.
214 Tires
A. All tires must be designed specifically for automobile racing, and must be approved by the manufacturer for its intended use.
B. Recapped tires will not be permitted.
C. Any device(s) used for warming the tires prior to competition is prohibited.
D. Any solvents or chemicals applied to the tire that have the effect of altering tire durometer will be cause for disqualification.
E. FOR PAVED EVENTS ONLY, all tire sizes and compounds must be selected from the approved list for the event. If the right rear tire is changed during the event, under red or yellow flag conditions, the car will restart at the end of the restart lineup. If yellow laps are counted, this restart position could be in addition to the loss of lap/s incurred in the pits. The replacement tire must be the same compound as the tire removed.
215 Throttle
A. Throttle toe straps are mandatory. A minimum of three (3) return springs must be connected to the throttle and at least one of these must be connected to the butterfly shaft.
B. If the throttle actuating mechanism is the cable type, the cable must be encased.
C. The throttle pedal must have a wide-open pedal stop.
216 Brakes
A. Cars must be equipped with an effective braking system.
B. Master cylinders not fixed to the frame must have flexible lines. Copper tubing is not acceptable anywhere in the system.
C. Brake discs are limited to being manufactured of steel, ferrous or aluminum alloy. Titanium, carbon or carbon composite brake rotors are not allowed. The use of carbon fiber or other composite material in the braking system is not allowed. Brake pad material is open.
D. If at any time during a competition it becomes evident that a car is without brakes, the necessary repairs must be completed before the car can continue in the competition.
217 Starter
Provisions must be made to start the engine without pushing or towing. In an emergency, qualified cars may be push-started for the race at the discretion of the Chief Steward.
218 Clutch
Cars must have a declutching device.
219 Transmission
The transmission system must have a neutral position and forward speed, with reverse optional. A maximum of two forward gears will be allowed. One gear must be for low speed only.
220 Engine Size Limits
A. Any engines not covered by the following specifications must be submitted to and approved by the Technical Director prior to entering a competition.
B. Stock production, single non-overhead camshaft, normally aspirated engines with pushrod operated valve mechanisms will be limited to a maximum piston displacement of 355.136 cubic inches and a minimum piston displacement of 350.0 cubic inches. A one (1) percent allowance for cleanup will be allowed.
C. Stock Block Engine Rule
1. Aluminum cylinder blocks are not permitted. After marked steel cylinder blocks are allowed providing the original factory configuration is maintained. All after market cylinder blocks are subject to the approval of USAC.
2. Cylinder heads for V-8 engines may be manufactured from aluminum alloy providing that the original factory configuration is maintained. All after market cylinder heads are subject to the approval of the USAC Technical Director. Chevrolet V-8 splayed-valve (SB-2) cylinder heads are not allowed.
3. The location of the camshaft must be in the cylinder block.
4. The location of the crankshaft may not be changed or altered.
5. The number of main bearings may not be changed.
6. Standard production harmonic balancers are prohibited. Engines utilizing harmonic balancers must use a high performance harmonic balancer meeting SFI Foundation Specification 18.1.
D. To qualify as a stock block, the following conditions shall be met:
1. Models, optional engines, parts and equipment must be announced in the MVMA specifications and to USAC and be available to the public prior to January 1. EXCEPTION: Aluminum alloy heads are exempted from these sources and prices of parts and equipment. Utilization by contestants must be approved by the USAC Technical Director prior to entry in an event.
2. Source Material: The block must originate from stock production castings which have gone through a factory approved machining schedule utilized for standard production parts.
E. Subsequent Alteration: The block may be subsequently refined, modified, and reformed by further machining and reworking within the following limitations:
1. Cylinder Bores: The number of cylinder bores may not be changed, but the size of individual bores may be altered to produce a displacement combination with the selected crankshaft conforming to the requirements under which the engine is to be entered.
2. Main Bearings and Support Structure: The number and location of main bearings may not be changed, but their diameter may be altered as considered necessary. Main bearings originally supported by the block must remain in the block. Substitution of an alternate structure for main bearing caps may be substituted or altered, and "girdles" will be permitted.
3. Camshaft Location and Support: The bores for camshaft bearings may be enlarged. Substitution of an alternate structure for camshaft bearing support is not allowed.
221 Fuel-Air
A. Fuel is restricted to methanol only. The addition of any unauthorized material(s) to the fuel is strictly prohibited.
B. The addition of any material(s) to the intake air or the addition of any mechanical device(s) essential to the application of this material(s) is strictly prohibited.
C. Any device, which artificially reduces the temperatures of the fuel, is strictly prohibited.
D. All fuel is subject to testing at any time. Any fuel that does not conform to the USAC standards, as administered at the track, will be considered illegal. The use of illegal fuel could result in disqualification from the event and/or the entire program.
222 Ignition-Electronic Equipment
A. Two-way radio communication is mandatory. Each team must supply a spotter to the designated location at each event. Teams must inform USAC of their radio frequencies.
B. Electronically controlled fuel injection systems are prohibited.
C. The use of electronic logic processors to control any functions of the race car, and/or any system for continuous data gathering from any function of the race car chassis is prohibited.
D. Any ignitions, other than magnetos, must be approved by USAC prior to their use in competition. It is the obligation of the participant, not the manufacturer, to obtain proper approval.
E. All cars must be equipped with an ignition switch or emergency shut-off located within easy reach of the driver.
223 Oil Supply
A. Oil may not be added to the engine supply during a race without first receiving permission from the USAC Technical Director or the Chief Steward.
B. The entire engine lubricating system must be of the dry sump type.
C. Oil tank vents and/or breathers must be located so as not to endanger the driver.
224 Exhaust
A. Exhaust systems must be designed to create a minimum fire hazard and a minimum hazard to other competitors.
B. The car may be required to have a muffler if local track conditions warrant. If so, this will be stated on each entry blank. Mufflers should be bolted to the exhaust collector in addition to clamps. Mufflers should be attached so they follow the angle of the nerfing bar as closely as possible.
225 Seating System
A. Aluminum seats are mandatory. The seating system should provide a lateral support on both the left and right sides. The seat bottom must be mounted on the centerline of the chassis.
The seat must be mounted to the chassis in a minimum of four positions with a minimum 5/16 inch steel bolt and nut. Each mounting hole in the seat must have a steel (minimum .060 thickness) or aluminum (minimum .125 thickness) doubler with a minimum 2-inch diameter.
B. It is absolutely necessary to provide a kick-up (roll-up) forward to the buttocks of sufficient height and strength to prevent forward movement and/or rotation of the torso under the seat belt.
C. It is mandatory that all cars have a headrest of high impact, shock-absorbing material behind the driver's head with a minimum thickness of one (1) inch. Seats with built in headrests must also comply with this requirement.
D. Adequate padding must be used under the buttocks to absorb impact.
E. Seat Belts - The use of an approved seat belt with a latch/lever release mechanism is mandatory. Rotary mechanisms are not allowed. Both the fastening design and condition of the belt are subject to the inspection of the Technical Committee. Life of the belts in use shall not exceed two (2) years and must be date stamped by the manufacturer. All belts must have a label showing that they meet SFI Foundation 16.1.
1. Seat belts must be worn as tight as possible.
2. Seat belts must be worn in such a manner that it passes around the pelvic area at a point below the anterior superior iliac spines. Under no condition may it be worn over the area of the intestines and abdomen.
3. Seat belts must come through the seat at the bottom on each side, thereby wrapping and holding the pelvic area over the greatest possible area. At any point where the belt passes through the side of the seat, the seat edges must be rolled or have grommets to prevent chafing or cutting of the belt material.
4. Five or six point (crotch) belts connected to the main belt quick release mechanism and securely attached to the chassis are mandatory.
F. Shoulder Harness - The use of double over the shoulder straps is mandatory. The minimum width of shoulder straps is three (3) inches. Both the fastening design and condition of the straps are subject to the inspection of the Technical Committee. Life of the shoulder straps in use shall not exceed two (2) years and must be date stamped by the manufacturer. All straps must have a label showing that they meet SFI specification 16.1.
1. Shoulder straps must be attached directly to a strong structural member of the chassis close behind the driver's head and neck. At points of attachment, they should be four (4) to six (6) inches apart. They should be attached in a line approximately 90 degrees to the seat back and be approximately level with the top of the driver's shoulders. (See Illustration)
2. Where the straps pass through the seat, the edges must be rolled or have grommets to prevent chafing or cutting of the strap material.
3. Shoulder straps must be secured behind the driver's shoulders so that they are prevented from sliding sideways more than one (1) inch in either direction.
4. Two belts joining in a "Y" behind the neck to form one strap may not be used.
5. The shoulder harness should be worn as tight as possible.
226 Fire Equipment
A. On Board Fire Systems - It is strongly recommended that each car have built-in operable fire extinguishing equipment with a minimum content of five (5) pounds located inside the car and within the wheelbase, but it should not be the dry powder type.
B. Fire Extinguishers in the Pits - The entrant or crew chief of each car must have in his pit a fully charged 10-pound dry powder extinguisher or its equivalent. A gauge or current inspection tag shall be attached to each fire extinguisher.
227 Fire Prevention
A. No smoking will be permitted in the pit area whenever fuels may be exposed to the atmosphere. Anyone found violating this rule will be removed from the pit area and will be subject to a fine.
B. Extreme care should be taken in the handling of fuels. Where local regulations are posted, they become a part of the United States Auto Club rules. Any individual found violating these regulations will be subject to fine and may be removed from the pit area. The car entrant will be responsible for the actions of his crew.
228 Refueling
Refueling during a race under green flag conditions is prohibited. Refueling is allowed under yellow or red flag conditions providing the driver is completely out of the car prior to fuel being added. Capacity of hand held refueling containers shall not exceed fifteen (15) U.S. Gallons.
229 Safety Equipment
It shall be the responsibility of the Technical Committee to inspect all safety equipment prior to each event. Any participant not complying in full with all safety requirements in this Rule Book will not be permitted to compete.
A. Helmets - All participating drivers must wear safety helmets designed specifically for auto racing that meet or exceed the 1990/1995 or 2000 Snell Foundation or SFI Foundation 31.2 specifications and are labeled as such. Helmets will be subject to inspection at each event by the Technical and/or medical representative. The use of an approved head and neck restraint is highly recommended.
B. Uniforms - All drivers must wear fire resistant head sock/helmet skirt, underwear, socks, shoes, gloves and a one-piece uniform fitted snugly around the neck, wrists and ankles. It is recommended that these items meet SFI Foundation Specifications 3.2A and 3.3.
C. Arm Restraints - Arm restraints are mandatory and must be worn at all times during competition.
D. Roll Cage Nets - It is recommended that all cars be fitted with roll cage nets on both the left and right sides of the roll cage for all events. All roll cage nets must conform to SFI Specifications 37.1, which specifies a functional quick release opening mechanism. The life of roll cage nets shall not exceed two (2) years. Caution should be used when positioning head restraining nets to be certain that the driver's head cannot get under the net in case of an accident. The bottom of the roll cage nets should be as close to the top of the shoulders as possible.
E. Roll Cage Padding - All chassis protrusions, roll cage tubes and roll bars in close proximity to the driver's helmet must be padded with a securely attached, high impact material conforming to SFI Foundation Specification 45.1.
230 Dentures
All drivers are required to remove all dentures before starting an event.
231 Car Numbers
A. All car numbers are assigned by the Director of Competition or his designate.
B. Every car must carry its assigned number prominently painted on the nose and on each side of the tail.
C. The numerals shall be white on black background or black on white background or contrasting equivalents. The final decision on the adequacy of the numbers will rest with the Director of Timing and Scoring.
D. Numbers 2 through 99 will be assigned to entrants on a permanent basis providing a car registration has been received prior to January 15 of each year. The number 1 is reserved for the National Champion driver and will not be reassigned. The use of number 1 is not cause to relinquish the competitor's permanent number. Numbers may be reassigned if the number was not actually used the previous season. The Director of Competition may reassign numbers at the conclusion of the season. Any number released by a competitor must be reassigned by the Director of Competition. Other numbers will be assigned in the order that requests are received.
E. After a number is assigned to a particular car and entrant, it will remain with the entrant until the end of the racing season unless reassigned by the Director of Competition.
232 Car Names
A. A car may not be named after a manufacturer or organization, unless the manufacturer or organization has given its written consent.
B. A car may not be named after a car manufacturer unless at least the engine was designed by the manufacturer.
C. If a car is named after an automotive product, other than a car, the product must be used in its proper relationship to the car.
D. A car may be named after a person, who is its entrant.
E. Names that are undignified, might confuse the public or might detract from the interest in competitions are prohibited.
233 Appearance
Cars, crews and all pit personnel, whose appearance detracts from the character of the program, may be excluded.
APPENDIX B
Silver Crown Championship Division Procedures
1201 Qualification Order - All entries in the race, including post entries, are eligible to participate in a single drawing for qualifying order. This drawing will be closed no later than the start of qualifications.
1202 Qualifications Procedures - All qualifications will be held in accordance with Part VIII in the current USAC Rule Book and the Official Entry for the event with the following additions and exceptions.
1. Any car not able to qualify within three draw positions of its original position in the qualification draw order may line up at the end of the qualifying order with the loss of one lap from the qualification attempt.
2. In order to be eligible for direct transfer to the feature race based on qualification time, a car must qualify within three draw positions of its original position in the qualification draw order and complete at least one official qualification lap at that time.
3. All cars not eligible for direct transfer to the feature race will be ranked by best qualifying time for the purpose of establishing a lineup(s) for the qualifying race(s). Any car(s) not completing an official qualification attempt may start at the rear of the qualifying race(s) at the discretion of the Chief Steward.
4. In the event a qualifying race(s) is/are not held, the feature race lineup, as per the official entry, will be determined by official qualifying results. Cars which fail to meet requirements of 1202 (2) will be moved to the rear of the starting order by their official qualifying time.
5. Any replacement(s) and/or alternate(s) necessary to complete the starting field for the feature race will be based upon the posted results of the qualifying race(s) with the fastest official qualification time, or by draw order if no times are posted. Replacements and/or alternates will be lined up at the rear of the starting field.
6. The Chief Steward is empowered to change the event format, including the number of laps to be run, as set forth in the Official Entry when unusual circumstances arise that demand this action.
1203 Drawing for Starting Positions - In the event qualifications cannot be held or completed, the starting positions will be filled by a random draw(s) as follows:
1. An "Available Qualifiers List" will be produced naming all entrant/driver combinations (entries) that are declared eligible and ready to qualify.
2. Entries from the "Available Qualifiers List" will be selected for the "Preferential Draw Group". This group is limited to the number of starting positions then available. The group will then participate in a random drawing for starting positions.
3. Eligibility for the "Preferential Draw Group" is as follows:
A. Current Silver Crown Series Driver Champion, then current Silver crown Series Entrant Champion followed by past Silver Crown Series Champions in reverse order to their seniority, alternating driver then owner for the preceding five seasons.
B. Top ten Silver Crown Series point leaders from the current year in order 1 through 10, alternating driver then entrant by position.
C. Top ten Silver Crown Series point leaders from the proceeding year in order 1 through 10, alternating driver then entrant by position.
4. Should any starting positions remain unfilled following the "Preferential Draw", those positions will be filled by a second random drawing among all remaining entries on the "Available Qualifiers List". These positions will start behind the "Preferential Draw Group".
1204 Stopping on the Course - A car that stops for any reason after leaving the grid, and impedes the start of the race, will be placed at the rear of the starting field.
1205 Pushing - Push starts at any time are subject to the availability of authorized push vehicles and at the discretion of the Chief Steward.
A. Qualifications: A car in its proper position for qualifying may be pushed started with the loss of one lap from the qualifying attempt.
B. Races: Any car requiring a push start at the start of an event will be placed at the rear of the starting field. Push starts under green flag or yellow flag conditions will be at the discretion of the Chief Steward.
1206 Laps Under Yellow Flag
1. In all events of 60 laps or less, laps where the yellow flag is displayed will not be scored.
2. Cars stopped on the course and are restarted will be placed at the rear of the field.
3. If the yellow flag is displayed before the field completes the first lap, a complete, two abreast restart will be made with the exception that any cars not completing the first lap, or stopping, will be placed at the rear of the field.
4. If the field completes the first lap under green, the first lap shall be scored. Any subsequent yellow flags will result in a single file restart lineup. This lineup will be determined by the last completed lap scored under the green flag.
5. Any car not completing the lap in which the yellow was first displayed, shall be considered involved in the incident and placed at the rear of the field.
6. If an incident occurs on the first lap where the yellow is displayed, and after running laps under yellow it becomes necessary to display the red flag, the restart lineup will be based on the yellow flag procedure and cars involved must start at the rear of the field.
7. A car unable to start a race that is later red flagged can enter the restart lineup at the rear of the field.
8. During a caution period a car may be called into the "designated pit area", using the Black Flag, for inspection by the Officials. If the car is determined to be safe to resume racing, and no work of any kind is performed, it may return to its previous position.
1207 Repositioning - Any driver who improves his or her position during a start or restart by passing other cars before a designated point on the track shall be guilty of a violation. The penalty will be a repositioning of the car rearward two positions for each car passed. This penalty will be assessed at the next yellow caution period, if possible, or in the Official Finish of the race.
1208 Testing - As per the sanction agreement with the USAC Race Organizer, practice and/or testing during the five calendar days prior to a racing event is not permitted. The term "racing event" means all official USAC sanctioned functions at the track in conjunction with this race, beginning with the first day of USAC sanctioned practice.
Exceptions: A. For events scheduled on Wednesdays, the five day rule is not in effect and practices are allowed up to and including the preceding Saturday.
B. USAC scheduled and sanctioned practices.
1209 Motorized Support Vehicles are required to have a plainly visible number on the front and back of the vehicle corresponding to the race car number.
