2004 SK MODIFIED RULES

Note: All additions to the rulebook are noted herein by Italicized red text. Every competitor must make himself/herself aware of and familiarize themselves with not only the technical rules in this chapter, but also the rules pertaining to safety and officiating in chapter one. By registering as an owner or driver you agree to be knowledgeable and bound by the contents found herein. 2.0) GENERAL DIVISION DESCRIPTION The idea behind this division is to keep engine parts as stock as possible in order to hold the expense down. While the rules listed here offer a good outline, every item cannot be covered by a written rule. If you want to run anything not covered in the rules, ASK FIRST! In the following rules you will see the term “OEM stock” used. This means “original equipment manufacturer”. The parts must come on a standard production car. Special “off-road” or racing parts will not be permitted unless pre-approved. No carbon fiber engine or chassis parts. ALL 2003 NASCAR RULES FOR THE MODIFIED DIVISION WILL BE ENFORCED FOR THE WATERFORD SPEEDBOWL MODIFIEDS WITH THE FOLLOWING CHANGES AND ADDITIONS WHICH ARE IN ITALICS. THESE RULES ARE FOR THE WATERFORD SPEEDBOWL ONLY WITH NO EXPRESSED OR IMPLIED AGREEMENT WITH ANY OTHER SPEEDWAY AS TO THE INTERPRETATION, IMPLEMENTATION AND METHOD OF INSPECTION BY THE TECHNICAL INSPECTORS. 2.1) RULES FOR MODIFIED DIVISION Open to Steel bodied automobiles provided they comply with, and adhere to, specifications as outlined for this division. NOTICE ALL EQUIPMENT IS SUBJECT TO THE APPROVAL OF TRACK OFFICIALS. NO EQUIPMENT WILL BE CONSIDERED AS HAVING BEEN APPROVED BY REASON OF HAVING PASSED THROUGH INSPECTION UNOBSERVED. ANY EQUIPMENT WHICH DOES NOT CONFORM TO SPECIFICATIONS OR TOLERANCES CONTAINED IN THE NASCAR RULEBOOK, WILL NOT BE ELIGIBLE FOR APPROVAL DURING 2003. 2.2) COMPETING MODELS Modified Division Races Modified Division races are open to eligible 1982 and later models of American-made steel bodied passenger car production sedans. Approved COMPETITION MODELS BUICK Skyhawk CHEVROLET Cavalier, Monte Carlo DODGE Daytona, Stealth FORD Mustang II, Probe, Escort MERCURY Merkur OLDSMOBILE Firenza PLYMOUTH Laser, Sundance PONTIAC Sunbird, J-2000, Grand Prix OTHER APPROVED MODELS Other models may be selected when available providing they are the same in body configuration and meet the spirit and intent of competitive racing as currently evidenced in Waterford Speedbowl’s Modified Division racing. 2.3) GENERAL CAR BODY REQUIREMENTS 2.3.1 CAR BODIES The car body must meet the following requirements: A. Cars must be neat appearing. B. All bodies must be installed on frame in a manner acceptable to the Track Officials. Window openings must remain stock appearing and must maintain the original manufacturers window opening configuration. No car will be allowed to compete with altered window openings. Bodies must be no wider than standard width from the front of the windshield opening to the rear of the car. Bodies must be no wider than the standard width from the front of the door panel to the rear of the quarter panels when measured beneath the car at the rocker panels. A minimum distance of 43 inches and a maximum distance of 45 inches is permitted across the body at the bottom of the front windshield opening. Bodies must not extend below the frame at the side rails. No skirts or additional metal may extend below the body. C. The floor area directly beneath the seat forward to the front engine firewall must be made using a minimum 1/8” inch steel. The remainder of the floor area to the right and rear of the seat must be made from a minimum 22 gauge steel. All floor area panels must be welded together. D. No streamlining at the top of the windshield. Bodies must have standard appearing windshield opening and the windshield post must follow standard configuration. E. No car will be allowed to compete with excessive body damage (excessive body damage to be determined by Track Officials.) F. No belly pans. A belly pan will be defined as any object or material that alters the flow of air under the car. Determination of whether any material or object is or is not a belly pan shall be at the discretion of the Track Officials. Bottom panel of the front nose panel may not extend rearward past the front edge of the harmonic balancer. G. The driver’s compartment may be enclosed with additional sheet metal. All interior sheet metal must be a minimum 22 gauge welded steel. No interior sheet metal can be higher than or enclose a standard window opening. Sheet metal in driver’s compartment must be horizontal from the top of the drive shaft tunnel to the right side door bars or angle from top of drive shaft tunnel upwards to top of right side door bars. Angled or horizontal metal must extend from the rear firewall or back of seat a minimum of 26 inches forward. The interior sheet metal behind the rear hoop may be roll formed upward to the top of the rear hoop cross bar. The sheet metal must extend rearward, and at the center of the rear axle housing, the sheet metal may angle upward and seal to the bottom of the rear window opening. No interior spoilers, wings, or wind deflectors allowed. No double panels. All interior sheet metal subject to Track Official’s approval. 2.3.2 OVERALL CAR WEIGHT All specified weight requirements will be with driver. THE MINIMUM WEIGHT AT ALL TIMES WILL BE 2600 POUNDS. No car will be allowed to have more than 56% of the total weight as the left side weight. 2.3.3 CAR WEIGHTS AFTER RACE NOTHING MAY BE ADDED TO OR TAKEN FROM THE CAR TO MAKE TOTAL OR LEFT SIDE WEIGHT. GAS, OIL OR WATER MAY NOT BE ADDED. 2.3.4 ADDED CAR WEIGHT Added weight must be in block form of magnetic steel or lead only in no less than five (5) pound blocks (no pellets). Added weight must be securely bolted to the frame rail. The added weight must be painted white and labeled with the car number and division. Dislodged weight cannot be returned to car for weighing after race. No added weight will be permitted inside drivers compartment. 2.4) DETAILED CAR BODY REQUIREMENTS In addition to the General Car Body Requirements specified in paragraph 2.4.1, the following Detailed Car Body Requirements shall be observed. 2.4.1 SPOILERS All spoilers must be approved by Track Officials before installation. An approved spoiler must be a non-adjustable part of the body which controls the flow of air over one (1) surface only. An approved spoiler must have a minimum thickness of 0.125 inch. Spoiler sizes will be reviewed as testing and/or race competition dictate, and adjustments may be made during the testing, official practice, or prior to events such as time trials and/or qualifying races, etc. 2.4.2 FRONT AIR DAM An approved air dam may be mounted to the front underside of cars. The optional metal or vinyl front air dam must be mounted perpendicular to the ground and no more than three (3) inches behind the front edge of the nose panel. Front nose panel and air dam must not extend past the rear edge of the front bumper and must maintain two (2) inches ground clearance. Nose panel and air dam must not extend past outside edge of front frame rails. Air dams must have a minimum ground clearance of two (2) inches. All support brackets must be mounted to rear of air dam. No horizontal or flat air deflectors may extend past the outer edges of the front nose panel side walls. 2.4.3 REAR SPOILERS All rear spoilers and spoiler mounting points must be approved by Track Officials. A solid rear spoiler of clear polycarbonate glass only may be installed at the rear deck lid and meet the requirements that follow: A. The maximum spoiler size permitted shall be eight (8) inches high by 48 inches wide. The rear spoiler must not be wider than the standard width of the rear quarter panels, measured across the top and shall not extend rearward past the trailing edge of the rear bumper. No decals or logos will be allowed on the rear spoilers. B. A maximum of two (2) one (1) inch wide adjustable supports are permitted on the front of the spoiler. C. A maximum of three (3) supports may be attached to the rear of the spoiler. The supports, front or rear, may be attached to the spoiler using a piece of one (1) by one (1) inch aluminum angle one (1) inch long. D. A maximum of 35 inches measured from the ground to the spoiler mounting point is permitted. 2.4.4 GLASS The use of a full windshield and rear window glass is optional. 2.4.5 WINDSHIELD A. A single one (1)piece radiused type of polycarbonate glass windshield must be used on the driver’s side. B. The windshield must be mounted flush with the cowl or dash panel and extend up to the top of the windshield opening in front of the driver. C. A complete steel windshield screen (with maximum openings of one (1) inch x two (2) inches) must be installed in the right side of the windshield opening. D. No decals are permitted on the windshield. E. All windshields, windshield screens and their installation must be acceptable to Waterford Speedbowl Officials. 2.4.6 REAR WINDOW The use of a rear window glass is permissible. When a rear window is used, it must be secured with two (2) exterior steel straps not less than 1/8 inch by one (1) inch bolted to roof panel with 5/16 inch bolts. If rear window is used, the opening must be completely closed with polycarbonate glass as thick as original rear window glass reinforced on inside with two (2) 1/8 inch by one (1) inch wide steel straps. 2.4.7 SIDE WINDOW GLASS/WINDOW SCREEN A. All side window glass must be removed. A nylon mesh screen must be installed in the left side door glass opening. The window screen must be a rib type, made from 3/4 inch wide nylon material with a minimum one (1) inch square opening between the ribs. The minimum window screen size shall be 22 inches wide by 16 inches high. All window screen mounts must be welded to the roll cage. The window screen, when in the closed position, must fit tight and be secured with a quick release type latch. B. The minimum side window opening on all models shall be 13-1/2 inches when measured from the top of the door panel to the roof drip rail or roll cage lowest point, whichever is lower. 2.4.8 HEADLIGHTS/PARKING LIGHTS All cars must be equipped with a solid taillight panel. The taillight panel must extend down to the top of the frame and have a maximum 1-1/2” lip on the bottom edge. 2.4.9 REAR VIEW MIRROR Rear view mirror compulsory. One mirror mounted in the upper center of the windshield opening no larger than 8"x 2". No multi-image mirrors. Drivers wearing approved head and neck restraint devices may use one (1) spot mirror that must be mounted to the #10 A bar. The Spot Mirror must be a maximum diameter of three inches (3".) 2.4.10 DASHBOARD All dashboards are subject to approval by Track Officials. 2.4.11 FIREWALL A. A front and rear firewall of a not less than 22 gauge steel must separate the driver from the engine compartment and fuel cell. B. The front firewall must be positioned below the leading edge of the windshield. C. The firewalls must be sealed and welded in place. 2.4.12 DOORS A. On all 1995 and newer model cars, the top of the door panel must be roll formed similar to a stock production car. B. All door panels shall be steel and mounted in a manner acceptable to the Track Officials. Any seams, creases or accent lines fabricated in the doors shall be made parallel with the top of the door. C. A minimum distance of 72 inches up to a maximum distance of 78 inches is permitted when measured from the center of the rear axle housing forward to the front of the door. A maximum distance of 45 inches is permitted when measured across the car at the front outside edge of the door panel. 2.4.13 QUARTER PANELS Quarter panels must be made of steel and meet the following requirements: A. On all 1995 and newer model cars, the top of the quarter panels must be roll formed similar to a stock production car. B. All cars must have rear wheel openings on the right side of a minimum of 11 inches and a maximum of 14 inches radius measured from center of the rear axle housing. C. A minimum distance of 34 inches and a maximum distance of 42 inches measured from the center of the rear axle to the rear of the body is permitted. A maximum distance of 60 inches is permitted between the top of the quarter panels measured across the body at the rear axle housing. D. The maximum height of the rear quarter panels measured from the ground to the rear of the quarter panel will be 35 inches. E. The rear quarter panels must maintain a minimum of eight (8) inch ground clearance behind the rear wheels. A maximum distance of 60 inches is permitted when measured across the top at the rear of the quarter panels. F. A maximum of four (4) degrees of rake from stock dimensions will be permitted in the body, measured anywhere along the quarter panels and doors. 2.4.14 GRILLES A. The air intake housing at the radiator must maintain a rectangular shape across the front of the nose with the opening being at least as wide as it is high and covering a minimum of 130 square inches. Only screen will be permitted in the opening to allow for proper cooling. B. No fiberglass air intake housings are permitted. 2.4.15 HOODS/ROOFS A. All cars must be equipped with a hood manufactured from a single piece of metal or fiberglass. B. The hood must be manufactured so that it will completely cover the engine compartment from the left side to the right side, turn down a minimum of four (4) inches on each side, and cover (if used) the engine side panels. No part of the hood at the side panels except for the “A” post, shock, and master cylinder covers may be higher than the lowest part of the hood. Only openings for the air cleaner and the distributor will be permitted. No portion of the hood may be higher than the bottom of the air cleaner. Hoods must be fastened with positive pin fasteners. C. All hoods must be acceptable to Track Officials. D. Roof must be stock for make and model of body used. Roof support posts must maintain the same angles as a stock production car. The front post (“A” post) must be mounted to the top front of the door panel. The rear post must be anchored to the rear quarter panels. E. Roof must be fastened for quick removal with "DZUS" type fasteners. 2.4.16 REAR DECK LIDS/TRUNKS Rear deck lid must be steel. 2.4.17 BUMPERS/SIDE RAILS The bumpers and side rails must meet the following requirements: A. Front bumpers must be made of two (2) pieces of 1-1/2 inches minimum to 1-3/4 inches maximum tubing four (4) inches to six (6) inches apart, center to center, mounted to the front frame rails, with a minimum of two (2) and a maximum of four (4) vertical connectors. If four (4) vertical connectors are used, two (2) would have to be welded at the radiused corners. Front bumpers must be convex in shape with rounded corners, and mounted to the outside edge of the front frame rails, but no wider. The maximum distance from the center of the front spindle to the front of the front bumper can be no more than 30 inches. Rear bumpers must be made from an “I” Beam extruded from aluminum. The minimum width, when measured across the rear of the car, will be 57 inches and the maximum width permitted will be 66 inches. Each end of the rear bumper must be (from the mounting side) cut on an angle and capped with a minimum 0.125 inch aluminum. All bumper caps must be welded and sharp edges must be filed. The minimum size permitted will be 2-3/4 inches by four (4) inches by 3/16 inch thick. Bumper must be mounted at axle height. A maximum distance of 46 inches measured at the center of the rear axle at the rear edge of the bumper is permitted. No weight reducing holes permitted in bumper. The height for the front or rear bumpers measured to the center will be 15”. Any inappropriate bumper will be disallowed. B. All cars must be equipped with rear corner rails and side rails. All rails must be constructed using a minimum .083 inch thick steel seamless tubing with an outside diameter of a minimum 1-1/4 inches and a maximum of 1-3/4 inches. Side rail bars should be constructed using the following guidelines. 1. Right side bars shall be constructed by using two (2) pieces of steel seamless tubing. The bottom bar shall attach to the rear of the frame rail and extend upward and outward even with the outside of the tires, or up to a maximum of 1/2 inch outside of the tires. The bottom side bar shall extend forward parallel with the frame rail and angle in to the front sub frame rail with minimal tire clearance. The bottom bar shall be mounted centerline with the rear axle and front spindle. The top side bar shall be attached centerline with the rear hoop cross bar extending outward and forward to the forward most point of the bottom bar. An additional support bar must be added in the center. The bar must be attached to the frame rail and side bar. Two (2) additional vertical support bars should be added, one (1) at the rear and one (1) in the center of the side rail bar. The distance measured at the front, center to center, of the top and bottom bars at the turn down area shall be a minimum of six (6) inches. The distance measured at the rear center to center shall be a maximum nine(9) inches and a minimum six(6) inches. No car will be permitted in competition without side rails. 2. Left side rail bars shall be constructed using the same guidelines described above except that the rear support bar may be a radiused bar that attaches to the rear hoop bar centered on the cross bar and extending down and attached to the frame rail. Left side rail bars must be mounted by centering the two parallel side rail bars with the center of the rear axle and the front spindle or left side bars may be raised a maximum of two (2) inches from center. No car will be permitted in competition without side rails. 3. Rear corner rails must be constructed using two (2) pieces of steel seamless tubing a minimum of 1-1/4 inches and maximum 1-3/4 inches in diameter. Both pieces of tubing shall be identically formed and welded to a steel bumper bracket at the rear. The tubing shall angle out and upward even with the outside of the tires, or up to a maximum of 1/2 inch outside of the tires and maintain a six (6) inch dimension measured center to center. The corner bumpers shall then turn in with a minimal tire clearance to the rear quarter panels. Additional support bars must be installed behind the body panels to the rear frame rails and/or roll cage. 2.5) GENERAL ENGINE REQUIREMENTS GENERAL ENGINE ELIGIBILITY Engine must be OEM cast iron V-8 production block heads and intake manifold. The only approved engine for GM is the Chevrolet 350, Ford 351, MOPAR 340 or 360. No deflashing, grinding, welding or painting of any internal area. Maximum overbore for GM and Ford is .045”. Maximum overbore for MOPAR is .030”. GENERAL ENGINE CHARACTERISTICS The following characteristics must be identical with the production engine upon which recognition of type has been granted. All parts listed below must originate from stock production castings and forging which have been machined according to the normal machine schedule utilized for standard production parts. They may be subsequently refined, modified and improved by further machining or rework. A. CYLINDER BLOCK:

B. CYLINDER HEAD:

DETAILED ENGINE REQUIREMENTS No changes from the Waterford Speedbowl approved standard production automobiles or component parts will be permitted except as specified in the following Waterford Speedbowl rules for engine preparation. In addition to the General Engine Requirements specified in paragraph 2.6.1, the following Detailed Engine Requirements shall be observed. 2.5.1 ENGINE LOCATION The engine location must be approved by Track Officials. The engine must be mounted between the frame rails in front of the driver. The centerline of the crankshaft when measured to the center of the lower ball joint, left and right, must be within two (2) inches in distance. The engine may not be tilted. 2.5.2 ENGINE GROUND CLEARANCE Engine ground clearance will be measured (with driver in car) at the oil pan. A minimum height of two (2) inches from the bottom of the oil pan to the ground must be maintained at all times. 2.5.3 ENGINE MOUNTS All engine mounts shall conform to the following requirements: A. Engine mounts must be reinforced and are subject to approval by Track Officials. B. All engine mounts must be securely bolted. 2.5.4 ENGINE BLOCKS The same engine block used to start the race must be used throughout that race. All engine blocks must meet the requirements that follow. 2.5.5 ELIGIBILITY A. All engine blocks must be a product of the manufacturer of the make and model car being used in competition. No aftermarket engine blocks permitted. B. The engine block must retain all standard external dimensions with the exception of the maximum allowable overbore and the surfacing of the block deck. No angle cutting of the block deck permitted. C. No aluminum blocks permitted. 2.5.6 PISTONS/RODS A. Flat top three (3) working ring aluminum pistons must be used. All three rings must be of magnetic steel Valve reliefs may be cut into pistons. No portion of piston may protrude above top of the block. B. Stock type steel rods only. All aftermarket rods must be a solid beam type steel sportsman rod. C. Only normal engine balancing; the use of aftermarket bolts and nuts and the use of full floating pins will be allowed. No deburring, deflashing, polishing, grinding, or lightening D. No billet rods. E. Maximum rod length: 6.250”. Minimum rod length is 5.700” F. Minimum weight for piston, pin, ring, bearing and rod assembly is 1075 grams. 2.5.7 OIL PAN NO dry sumps, external oil pumps or tanks or accu-sump systems allowed. Aftermarket pans with a minimum sump of 6-1/2” will be allowed. Windage trays of any type will be allowed. Waterford Speedbowl 2” ground clearance rule must be maintained. Oil coolers are allowed. Only OEM type in the pan oil pumps. 2.5.8 HEAD - OEM CAST IRON ONLY CHEVROLET must run STRAIGHT PLUG HEADS that came with a maximum intake valve of 2.02”. Intake valve must be a maximum of 2.02”. Exhaust valve must be no larger than 1.60”. FORD CLEVELAND must run heads of two barrel design and may use Ford Motorsports cast iron replacement head, with a maximum intake valve of 2.05” and exhaust valve of 1.66”. MOPAR must run heads with a maximum intake valve of 2.02” and exhaust valve of 1.60”. W2 type heads are not permitted. Only MOPAR casting # 3418915,477,2576, 4448308 and P5249574 are allowed. These are the only acceptable castings. IMPORTANT All heads must have a minimum of 60cc. combustion chamber. When heads are checked at the track you will be responsible for cleaning and carbon removal to make the 60cc. limit. THE ONLY MODIFICATIONS ALLOWED will be milling of the gasket surfaces and the addition of screw-in studs and guide plates. Optional valve seals, Poly-locks or jam-nut devises are also permitted. MACHINING OF VALVE GUIDE BOSSES FOR SEALS ONLY. Coolant return lines will be allowed to be placed on the ends of the heads. No lines will be allowed on the sides of the head. The following head modifications WILL NOT BE ALLOWED: porting, polishing, ANY grinding in ports or combustion chambers, removal of any flashing, chemical milling or enlarging of spring pockets. No interior painting or Teflon coating. No more than two intake mounting holes may have HeliCoils. Holes must take standard intake manifold bolts. 2.5.9 VALVES All valves must be identical in appearance and construction as an OEM type valve. No air directional devices will be permitted on any of the valve surfaces. Valve stems must have a minimum diameter of 11/32 inch. Stainless steel replacement valves are permitted. 2.5.10 VALVE JOBS "Valve job" rule for all heads will be as follows; All cutting and/or grinding must be centered off the centerline of the valve guide. Absolutely no hand grinding or polishing of any part of the head. On the combustion chamber side of the intake seat, no cutting and/or grinding may be larger in diameter than 2.350". On the combustion chamber side of the exhaust seat, no cutting and/or grinding may be larger in diameter than 1.930". On the bowl side of the intake and exhaust seats, the maximum angle of cutting and/or grinding will be 90 degrees. No cutting and/or grinding within 1/8" of the bottom of the valve guides.

The following are the only modifications allowed on all heads:

The following are modifications that are not allowed on any heads:

NOTE: Because of the difficulty in determining that this process has been done, heavy fines and loss of driver and owner points will result at the discretion of the competitor director as recommended by the Tech. Inspector.

2.5.11 VALVE SPRINGS Any valve spring may be used. 2.5.12 CRANKSHAFT Only stock production OEM crankshafts allowed. NO aftermarket cranks. The maximum allowable stroke tolerance will be +/- .015”. NO knife edge crankshafts allowed. NO machining or polishing of the crankshaft counterweights allowed. NORMAL engine balancing will be the ONLY acceptable modification that can be performed on this piece. NOTE: Normal engine balancing does not include any welding, plating, or grinding on the crankshaft. No painting or teflon coating. Original bore and stroke combination must be maintained. NO drilling of rod journals. Minimum main journal size .020” under stock. Minimum rod journal size .030” under stock. Minimum crankshaft weights are General Motors engines 50 lbs., Ford and Chrysler 54 lbs. 2.5.13 CAMSHAFT Stock lifter diameter must be maintained. No roller, mushroom, oversize, convex, concave or ceramic lifters. Only flat bottom magnetic steel straight barrel lifters of the same diameter and length as stock. Maximum lift at the valve with zero (0) lash will be .550”. 2.5.14 VALVE LIFTERS Stock lifter diameter must be maintained. No roller, mushroom or oversized lifters. Maximum lift at the valve with zero lash will be .550” 2.5.15 TIMING CHAIN Any type chain allowed. No gear or belt drives. 2.5.16 ROCKER ARMS Roller rocker arms permitted. Rockers must be independent and stud type. No shaft rockers. Stud Girdles Are Permitted 2.5.17 INTAKE MANIFOLD STOCK CAST IRON PASSENGER CAR MANIFOLDS OF 2 BARREL DESIGN ONLY! You are required to have an UNALTERED Stock manifold. NO porting, polishing, acid dipping, deburring, de-flashing, abrasive cleaning, internal painting, milling, cutting, drilling holes, enlarging bolt holes, matching of ports or welding. ABSOLUTELY NO MODIFICATIONS OF ANY KIND. A track supplied stock intake manifold must fit your engine complete with stock gaskets. All bolt holes must be in alignment and same size as stock. MOPAR intake manifold must be of two barrel cast iron design from a 318 or 360 engine. ABSOLUTELY NO COOLANT LINES IN THE INTAKE MANIFOLD. 2.5.18 CARBURETOR THE ONLY approved carburetor shall be the Holley two barrel model #4412. A. Body of Carburetor: No polishing, grinding or drilling of holes permitted. B. The choke may be removed, but all screw holes must be permanently sealed. C. Choke Horn: Choke horn may not be removed. D. Boosters: Boosters may not be changed. Size or shape must not be altered. Height must remain standard. E. Venturi: Venturi area must not be altered in any manner. Casting ring must not be removed. F. Alterations to allow additional air to be picked up below the opening of the venturi such as altered gaskets, base plates and drilling holes into the carburetor will not be permitted. G. Base Plate: Base plate must not be altered in shape or size. H. Butterflies: Stock butterflies must not be thinned or tapered. Idle holes may be drilled in butterflies. Screw ends may be cut even with shaft but screw heads must remain standard. I. Throttle Shaft: Shaft must remain standard and must not be thinned or cut in any. 2.5.19 CARBURETOR SPACER Only one solid spacer made of aluminum or phenolic plastic of a maximum height of one inch permitted. Only one .075” max. gasket per side. No wedge shaped mounting surfaces, both top and of carburetor. Port holes or hole must be vertical to the surface with no beveling, tapering, or flaring. No additional openings for the induction or air allowed. All spacers must be approved by Track Officials. 2.5.20 CARBURETOR JETS Carburetor jets must be the same type as supplied by the carburetor manufacturer. 2.5.21 CARBURETOR GASOLINE FILTER Gasoline filters may be used. The location and size of the filter must be acceptable to Track Officials. 2.5.22 FUEL INJECTION OR SUPERCHARGER Fuel injection or superchargers not permitted 2.5.23 CARBURETOR AIR CLEANER A. Air cleaner cannot be removed at any time during competition or practice. B. Only round dry type paper air cleaner elements of a minimum 12” - maximum 14” diameter will be permitted. Maximum of 5” in height. All air must be filtered through the element. Top of the air cleaner must be solid with no holes. It will be permissible to shield the front area of the air cleaner up to a maximum of one-half of the air cleaner circumference and not wider than the height of the element. Metal top and bottom of the air cleaner must be of the same diameter. Only a maximum of a 1” lip permitted from the air cleaner element to the edge of the top and bottom of the air cleaner. No air induction, ducts, baffles, tubes or funnels which may control the air leading to inside of, or between the air filter and carburetor. The air filter base must have a minimum round opening of 5 inches. No plastic air cleaners or parts. A 1” maximum height spacer may be used between the carburetor and the air cleaner, or an air cleaner with a 1" lip can be used, but not both. C. The bottom of the air filter element must measure within one inch of the carburetor's top flange. A spacer may be used between the carburetor and the air cleaner so long as the 1" specification is not exceeded. 2.5.23 AIR INTAKE No cowl air induction permitted. Absolutely no ducts or baffles permitted on or leading to the air cleaner or element. 2.6) ENGINE/CAR ELECTRICAL SYSTEM 2.6.1 IGNITION SYSTEM (from NASCAR rule Book, Late Model Stock Car Section) A. Electronic distributors are permitted. All electronic distributors must be in stock type housings, equipped with a magnetic pickup, gear driven and mounted in the stock location. Billet Distributor housing is permitted. B. Single or dual point camshaft driven distributors are permitted. C. Only one (1) ignition coil is permitted and must be mounted on engine side of the firewall. D. Electronic firing module amplifier box is NOT permitted. E. Computerized, multi-coil, dual electronic firing module box or crank trigger systems are not permitted. Magnetos are not permitted. All ignition systems are subject to approval by Track Officials F. Adjustable timing controls are not permitted G. Retard or ignition delay devices will not be permitted H. External RPM limiters will not be permitted. I. Accessories to regulate the power supply will not be permitted. J. The tachometer wire must run from the distributor to the tachometer along the #8 dash bar separate from any other wires and in unobstructed view for inspection. The tachometer wire must be isolated from any other wires, connection or devices. The entire length of the tachometer wire must be visible from distributor to gauge. K. A heavy red wire(positive to the battery), and a heavy black wire (negative to the ground) only will be permitted. No other wires will be permitted to enter the amplifier box 2.6.2 ALTERNATOR The alternator systems if used must be working within specifications and be mounted in front of the engine. 2.6.3 STARTER The self-starter must be in working order. Gear reduction starters acceptable to Track Officials permitted. All cars must be capable of starting under their own power. After race is underway, cars may be started by hand pushing in pit area only, but under no circumstances is any car to be pushed onto race track from pit area. 2.6.4 BATTERY Battery must be located between the frame rails. Battery must be located under hood or floor of the car. If located under the floor, the battery must be completely encased, if located under the hood, the battery must have suitable cover. No battery may be forward of the radiator or rear of the rear end housing of the car. Battery location subject to approval by Track Officials. 2.6.5 ELECTRICAL SWITCH LOCATION All electrical switches must be located on the dash panel or within easy reach of the driver. A labeled on-off master switch to the battery cable must be installed on the cowl behind the windshield opening on the right side of the driver. The switch must be easily accessible and in plain view. 2.7) ENGINE COOLING SYSTEM 2.7.1 WATER PUMP OEM type only. NO electric pumps. Modifications of stock impellers will be allowed. Any V-Belt or serpentine belt allowed. No cog belts. Fluid harmonic impellers will be allowed. 2.7.2 FAN A. Type of fan used is optional. B. Electric fans are permitted. 2.7.3 FAN SHROUD AND DUCTS When ducting air from the nose housing to the radiator, air directional shields are permitted within the duct. 2.7.4 RADIATOR The engine cooling radiator must meet the following requirements: A. Radiator must remain stock appearing and remain in front of the engine. B. Radiator dust screens permitted. C. Radiator installation must be acceptable to Track Officials. D. Radiator overflow pipe may be relocated. E. Only water may be used in cooling system. WATER ONLY, NO ADDITIVES OF ANY KIND PERMITTED. 2.7.5) ENGINE LUBRICATION 2.7.6 OIL Any oil is permissible. No combustion enhancing additives are permitted. 2.7.7 OIL PRESSURE Oil pressure may be regulated at the discretion of the crew chief. 2.7.8 OIL FILTERS Oil filters and breather caps acceptable to Track Officials may be used. 2.8) ENGINE EXHAUST SYSTEM 2.8.1 EXHAUST PIPES/MUFFLERS A. No 180 degree exhaust systems permitted. . No Tri-Y headers or Multi merge headers. Only one (1) collector allowed per side. All headers subject to approval of Track Officials B. Exhaust pipes must come out aft of engine at cowl and must extend a minimum of six (6) inches past the cowl. C. Right exhaust pipe may run beneath the car, but must turn down out toward the bottom of the right side frame rail. D. Two noise reducing mufflers must be used. The only approved mufflers for the SK Modified division are the Lobak # RCM-30-12-30, RCM-35-12-35 and RCM-35-12-30 or Moroso # 94051 or 94052. No modifications to the mufflers will be allowed. 3.5” maximum diameter. E. Header wrap is not permitted anywhere on exhaust system. F. Only one muffler and exhaust pipe allowed per side. G. Outlet of exhaust pipes must be angled down toward track surface. H. Exhaust system is subject to approval by Track Officials. 2.8.2 HEAT SHIELDS Heat shields to cover exhaust manifold can be no more than six (6) inches wide and no longer than the valve cover. 2.9) DRIVE TRAIN 2.9.1 ENGINE DRIVE TRAIN - FLYWHEEL AND CLUTCH Stock steel flywheel for engine type. Replacement OEM type steel pressure plate and steel disc only. Minimum 10” clutch and pressure plate. No drilling or lightening of any part. Steel bolts only. THE FOLLOWING WEIGHTS ARE THE MINIMUM ALLOWED FOR EACH PART: FLYWHEEL 12.5 LB. PRESSURE PLATE & COVER 13 LB. DISK 3LB. 2.9.2 BELL HOUSING Only a special production all magnetic steel bell housing can be used. The bell housing must enclose the flywheel 360 degrees with minimum 1/4 inch magnetic steel. Any changes to the bell housing must be made 1/4 inch magnetic steel and welded in place. All welds must be done inside and outside of the bell housing. No bolt on pieces. An opening no larger than 3 1/2 x 4 inches may be used for throw out bearing access. This hole may be covered with sheet metal. 2.9.3 TRANSMISSION ONLY OEM stock 3 & 4 speed transmissions may be used. Three forward and reverse gears must be in working order. The only modifications allowed are the addition of oil seals. All internal parts must be OEM. No machining of any internal rotating or non-rotating parts including gears, shafts and case. No additional or different from OEM bearings. No auxiliary, over or under drive, or automatic transmissions. High gear must have a ratio of 1 to 1 and no other gear may have a ratio higher than 1.20 to 1. Removal of first gear permitted in 4-speed.Tall shaft may have roller bearing. 2.9.4 DRIVE SHAFT The drive shaft must meet the following requirements: A. Drive shaft and universals must be similar in design to standard production type. Only a one (1) piece steel drive shaft permitted. B. It is mandatory that two (2) 360 degree solid steel brackets, no less than two (2) inches wide and 1/4 inch thick, be placed around the drive shaft and torque arm and be fastened to the crossmember of the car. C. All driveshafts must be painted white. 2.9.5 REAR AXLE The rear axle must meet the following requirements: A. Locked rear axles allowed. Floating axles with special hubs permitted. Full floating rear axles compulsory on all tracks. Quick change center sections allowed. No front wheel or four (4) wheel drive trains permitted. Axles must be magnetic steel. B. The distance, measured from the center of the rear end housing to the rear hubs, left and right, at the point the wheels bolt on, must be within three (3) inches in length. Only steel axle housing permitted. C. The rear end must be mounted so that the inside edge of the left rear tire is even with or outside the outermost edge of the left side frame rail. D. On all cars constructed for 1989 or later, the rear end must be mounted so that the inside edge of the left rear tire is even with, or outside, the inside edge of the left frame rail between the front and rear firewall. Cars competing under this amended rule must have roll cage widened and mounted on top of the frame rail the same as current models. E. Gear Rules: 5.38 maximum and 4.86 minimum, Minimum circumference of right rear tire @20 psi. is 84”. F. Spool only, no lockers, "gold tracks" type or "true track" type rear ends. 2.9.6 WHEELS AND LUG BOLTS The wheels must meet the following requirements: A. Only 15 inch diameter reinforced steel wheels with a maximum width of 15 inches are permitted. B. Any offset is permitted. C. Solid heavy duty 5/8 inch steel lug bolts with steel lug nuts must be used. D. No bead locks permitted. E. No wheels are allowed that do not meet the specifications and tolerances of the Tire and Rim Association. Specifically, oversized wheels which have an increased circumference of the bead flange are NOT allowed. 2.9.7 TIRES Track tire rule in effect (See tire rule as posted at track.). All tires must be purchased from the track tire dealer. Use of tire altering chemicals is forbidden (See track tire specifications for minimum/maximum allowable tire pressure.). 2.9.8 PHYSICAL REQUIREMENTS A. No hand grooving, buffing, grinding, and/or cutting on any area of racing tire allowed. B. Tires that have been altered by unauthorized treatment to the tread area will not be permitted. 2.9.9 APPROVED TIRE REQUIREMENTS Unless notified otherwise, all tires must be used in approved positions. Approved positions are those positions on the car which are recommended by a tire manufacturer for its tires used by competitors in the particular event being run. 2.9.10 TIRE MEASUREMENT PROCEDURE A measuring device will be used to determine maximum size of the tire. Tires may be selected at each Waterford Speedbowl event by Track Officials for measurements. Tires to be inspected must be mounted on a 15 inch wheel of the proper rim width. Twenty pounds air pressure will be required for the measurements. 2.9.11 THE USAGE RULES The following rules govern the use of approved and qualified tires: A. During the running of any Modified event, only one (1) jack and two (2) air wrenches may be used for any tire changes. B. Should identification number of serial numbers be defaced on any previously approved tire, this tire will be ruled ineligible for competition. 2.10) FRAMES No holes may be cut in frame rails to lighten. 2.10.1 GENERAL FRAME ELIGIBILITY A. All frames must meet the requirements described in the following paragraphs. B. No aluminum or light alloy frames permitted. 2.10.2 FRAME REQUIREMENTS A. All frames are subject to Track Official’s approval. A minimum ground clearance of two (2) inches must be maintained on any part of the frame. All frame components must be made of steel and welded. B. Side frame rails and rear kick up must be constructed with .120 inch minimum thickness, and be a minimum of two (2) inches wide and three (3) inches high steel box tubing. The distance from the centerline of the driveline to the left side frame rail, measured anywhere along the frame, must be within six (6) inches (eight (8) inches on 1989 and newer models with the frame rail and roll cage extension) of the distance from the centerline of the drive train to the right frame rail. A minimum width of 34 inches, and maximum 46 inches, measured from center of left frame rail to center of fifth frame rail, must be maintained in the driver’s compartment. A minimum width of 31 inches and a maximum of 46 inches, measured from center of left frame rail to center of right frame rail, must be maintained on the rear kick up, with exception for suspension and tire clearance. All rear kick ups must maintain a minimum of 18 degrees* from side frame rails to top of kick up. C. Fuel cell protector bar, using a minimum 1-1/2 inch seamless steel tubing, must be installed behind the fuel cell. This protective bar must be as wide as the fuel cell and as low to the ground as the fuel cell with a minimum of two (2) uprights from the protective bar to the rear frame crossmember, evenly spaced behind the fuel cell. An X crossmember made of one (1) inch steel tubing must be installed beneath the fuel cell from corner to corner. The X crossmember must be welded or bolted to the rear frame rails in a secure manner. Two (2) additional support bars, one (1) at each corner of the protective bar, must extend forward and be welded to the rear frame assembly. D. The front sub-frame assembly must be constructed using a minimum .083 inch thickness, two (2) inches wide, and three (3) inches in height steel tubing. A minimum of 27 inches, and a maximum of 32 inches, measured from center of left frame rail to center of right frame rail, must be maintained from the mounting point of upper control arms forward. All front sub-frame assemblies must maintain a minimum of 30 degrees* angle from side frame rails up to the top of the sub-frame. All sub-frame assembly support bracing shall be a minimum .090 inch by 1-3/4 inches round steel seamless tubing. Frame support bars, left and right, must extend from the roll cage to the sub-frame and must have a downward radius bent into the bars before they are welded to the sub-frame. The left and right support bars must not have any additional braces added between the front leg bars and where they attach to the front sub-frame assembly. A flex support tube may be added to the front support bar at the radius and extend forward and be attached to a crossmember. Any frame rejected by Track Officials for showing poor workmanship will not be approved until necessary corrections have been made. E. In order to increase the driver compartment area, the left side frame rail and roll cage may be moved out a maximum of two (2) inches. This rule applies to all cars being constructed for 1989 and later. *NOTE: Some older frames found on cars already competing at the Waterford Speedbowl may be allowed to compete without conforming to “kick up” angle rules. However, it will soon be mandatory to change all remaining frames to the present standard. All competitors are encouraged to modify their frames to comply. Speedbowl officials may require such modifications where a particular car has been so severely damaged as to require a new “clip” or “clips”. 2.11) SUSPENSION All suspensions and related parts must be reinforced and meet the following requirements. 2.11.1 COIL SPRINGS A. Coil Over Front Springs: 1. Coil covers must mount to lower control arm. 2. Strut bars will not be permitted for mounting of coil covers. B. Coil Over Rear Springs: 1. Rear spring position may be changed, but both rear springs must be located either inside or outside of frame rails. 2.11.2 SWAY BARS Only steel front sway bars are permitted. No rear sway bars (anti-roll bars) will be permitted. 2.11.3 COIL OVER SHOCKS All shocks subject to Speedway approval. No double adjustable shocks. No remote adjustable shocks. No shock with a published Racers Net Price of greater than $275.00 will be permitted. Any shocks to be approved must be available to all competitors. 2.11.4 A-FRAMES The upper A-frames and lower control arms must meet the following requirements: A. Upper A-frames and lower control arms must be acceptable to Waterford Speedbowl Officials. B. When attaching upper control arms to the mounting plate, only standard type castor-camber shims or washers will be permitted. 2.11.5 SPINDLES, WHEEL BEARINGS, AND HUBS The spindles, wheel bearings, and hubs must meet the following requirements: A. Heavy duty steel spindles and wheel bearings are compulsory. B. Aluminum hubs are permitted. C. Spindles and hubs must be approved by Track Officials. D. Wheel tethers are required for the front wheels. The only tethers allowed are those approved by NASCAR 2.11.6 TREAD WIDTH REQUIREMENTS A. Steel spacers are permitted to utilize maximum allowable tread width. B. All eligible cars must maintain a maximum allowable tread width, front and rear, of 84 inches measured at outside of tire, zero toe-in, at spindle height. 2.11.7 WHEELBASE REQUIREMENTS A. The minimum wheelbase permitted in Modified competition is 107 inches. B. When measuring the wheelbase, the minimum allowable tolerance cannot exceed one (1) inch plus or minus on the other side. 2.11.8 BODY HEIGHT AND GROUND CLEARANCE REQUIREMENTS 2.11.8.1 BODY HEIGHT REQUIREMENTS Body height shall be determined by measuring (with driver) the overall height of the car from a distance of six (6) inches behind the top of the windshield on the roof centerline. Minimum height will be 40 inches. The rear of the roof at the highest point shall be no more than three (3) inches higher than the actual front measurement. 2.11.8.2 GROUND CLEARANCE REQUIREMENTS Frame rail and sheet metal clearance will be two (2) inches. All ground clearance requirements will be measured with the driver in the car. 2.11.9 WEIGHT SHIFTING DEVICES A. No mechanical or electrical devices for shifting weight will be permitted inside of driver compartment. B. No hydraulic or electronic weight shifting devices permitted at any time. 2.12. STEERING COMPONENTS The car steering components must meet the following requirements: A. Rack and pinion steering allowed. B. All cars will be equipped with a steel steering shaft. C. Tie rods, drag links and component parts must be heavy duty. Interchangeable pitman arms may be used. D. Center-top of steering post must be padded with at least two (2) inches of resilient material. E. A quick release steel coupling on steering wheel is mandatory. The steel couplings cannot be covered with plastics or coatings. The use of universal joints in steering shaft must be approved by Track Officials. 2.13 ) BRAKES AND BRAKE COOLING 2.13.1 BRAKE COMPONENTS The car brake components must meet the following requirements: A. Four (4) wheel disc brakes mandatory. Steel rotors only B. Master cylinder(s) and reservoir(s) should be mounted on the engine side of the front firewall. C. No inboard brakes allowed. D. No electronic brake actuators will be permitted. E. Power assisted braking systems will not be permitted. 2.13.2 BRAKE COOLING One (1) air duct per wheel may be used for brake cooling. All scoops must be acceptable to Track Officials. Maximum dimension of front brake air scoops is three (3) inches x eight (8) inches when mounted to front sub-frame or front bumper. Maximum dimensions of rear brake air scoops mounted in the quarter panel or door is 10 inches long by eight (8) inches wide and must be painted the same color as the car. Screens and air ducts, from the opening to the brakes, must be acceptable to Track Officials. 2.14 ) FUEL 2.14.1 DEFINITION The word “Fuel”, whenever used in this document shall be understood to mean automotive gasoline which complies with the specifications given in this section. 2.14.2 FUEL SPECIFICATIONS - A. The fuel shall be automotive gasoline only. B. Gasoline is defined for purposes of this rule book as a mixture of hydrocarbons only. Non-hydrocarbons which do not increase the specific energy of the gasoline are allowed to the extend they do not exceed 0.15% by volume and are blended in the gasoline by the refiner or manufacturer. Gasoline is a good electrical insulator, or dielectric, and its relative effectiveness as an insulator is represented by its Dielectric Constant. the average D.C. for the hydrocarbons which comprise gasoline is 2.025. This is defined as a reading of “0” with the Gasoline Certification Meter. The standard for fuels at Waterford Speedbowl shall be SUNOCO PURPLE or SUNOCO SUPREME. The use of unleaded fuel is not permitted. C. The gasoline shall not be blended with alcohols, ethers or other oxygenates and it shall not be blended with propylene oxide, aniline or its derivatives, nitro compounds or other nitrogen containing compounds. D. No icing or cooling of the fuel system is permitted in the garage, pit or racing area. E. Gasoline may be tested and certified at any event through the application of various chemical analyses as considered appropriate by officials. Gasoline may be checked before, during and after the racing events. 2.14.3 FUEL SYSTEM A. Track Officials will reject any fuel cells, containers, or check valves which appear to be damaged, defective or do not function properly. Fuel cell vent pipe check valves are compulsory. B. No pressure system allowed. Any concealed pressure type containers, feed lines or actuating mechanism will not be permitted, even if inoperable. C. No fuel catalyst or convertors. 2.14.4 FUEL CELL & CONTAINER The use of a commercially manufactured fuel cell is mandatory. A. The maximum fuel cell capacity, including the filler spout and overflow, shall be 24 gallons. The nominal fuel cell dimensions are 24-1/4 inches x 16-3/8 inches x 13-1/4 inches. B. No materials other than standard foam as provided by the fuel cell manufacturer are permitted to make the fuel cell meet the 24 gallon capacity. 2.14.5 FUEL CELL CONTAINER The use of a fuel cell container is mandatory. The fuel cell container must meet the following requirements: A. Fuel cell must be encased in a container of not less than 22 gauge steel. Fuel cells must be fitted within the container so that the maximum capacity, including filler spout will not exceed 24 gallons. B. The 24 gallon capacity fuel cell container size shall be 25 inches x 16-3/4 inches x 13-5/8 inches (inside dimensions). C. Interior sheet metal must allow access to top of fuel cell for inspection. 2.14.6 FUEL CELL AND FUEL CELL CONTAINER INSTALLATION The fuel cell and fuel cell container shall be installed in accordance with the following requirements: A. Fuel cell and fuel cell container must be installed as far forward as possible in trunk compartment behind the rear axle and maintain a minimum ground clearance of six (6) inches. B. The fuel cell container must be secured by one (1) inch by one (1) inch square steel tubing or one (1) inch by 1/8 inch thick steel straps two (2) lengthwise and two (2) crosswise. The straps must be located as close to the fuel filler check valve housing as possible. C. Fire wall of steel not less than 22 gauge thickness must be located between trunk and driver’s compartment. 2.14.7 FUEL FILLER Fuel filler shall meet the following requirements: A. Dry couplings must be mounted at an angle on the left rear quarter panel (left fill only). Mounting must be as near to the top of the panel and as far back as possible. B. Check valve filler neck inside diameter shall not exceed 2-1/8 inches maximum; 2-1/4 inches outside diameter. C. Filler cap must be located in left quarter panel at top of fender line. D. The maximum filler spout size is four (4) inches x eight (8) inches x 18 inches. E. If a gas cap is used it must be painted white with the car number on it for identification. 2.14.8 FUEL CELL VENT The fuel cell shall be vented as follows: A. One, one (1) inch maximum vent to outside of body at left rear corner. A fuel vent flap valve is recommended on all tracks. B. Fuel cell check valve vent pipe neck inside diameter shall not exceed one (1) inch maximum. The fuel cell vent flexible hose shall have a maximum inside diameter of 1-1/4 inches and a maximum length of 70 inches. C. A screen cap with a maximum diameter of 1-1/4 inches may be placed over the vent. 2.14.9 FUEL LINES AND FUEL PUMP 2.14.9.1 FUEL LINES The fuel lines and fuel line connections must meet the following requirements: A. Either (or both) right or left side pickup in fuel cell may be used. B. Only one (1) fuel line permitted from fuel cell to fuel pump. C. All fuel lines are subject to Track Official’s approval. D. Fuel lines from cell to carburetor may be relocated to prevent vapor lock, but must remain under floor of car unless otherwise approved. Line may be replaced with neoprene hose not to exceed 1/2 inch I.D. When the fuel line runs through the right side of the driver’s compartment, it must be enclosed in a one (1) inch outside diameter steel tube. E. No additional lines may be used on fuel system. Extra fuel lines or fuel cells, concealed or otherwise, are prohibited. F. It is recommended that an on-off switch be mounted within easy reach of driver. G. Positively no electrical devices permitted in trunk compartment. 2.14.9.2 FUEL PUMP The fuel pump must meet the following requirements: A. Electric fuel pumps are not permitted. B. Water cooling of the fuel pump is not permitted. C. Only mechanical fuel pumps in stock location permitted. 2.15) ACCESSORIES 2.15.1 RADIOS MANDATORY!!! Every car must have a spotter monitoring race control by way of scanner or radio. ALL Spotters will be located in a central area provided by Waterford Speedbowl Officials with 2-way radio communication to their car. Each spotter will be identifiable as to which car they are spotting for. Failure to monitor and obey radio direction will result in removal from the race. 2.15.2 No Onboard Computers, Automated Electronics, Recording Devices or Digital Readout Gauges of any kind are permitted. “Tell-Tale” Type Tachometers are the only standard exception to this rule.