2013 STAFFORD SPEEDWAY LATE MODEL DIVISION
X-Y-G TUBE FRAME RULES
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The following rules apply for the SMS Late Model division (X-Y-G SUB-SECTION). Additionally, the NASCAR Whelen All American Series rules will apply where noted. FOR ALL OTHER RULES REFER TO THE (OEM) LATE MODEL RULE BOOK.
DRIVER ELIGIBILITY– All drivers must have a NASCAR CHD (Charger Division Driver) or higher driver’s license. Drivers competing in the Late Model division are not permitted in the SK LIGHT MODIFIED, LIMITED LATE MODEL, or DARE STOCK division on the same event date. Drivers must be a minimum 16 years of age to compete in the SK Modified® division.
20F- 1 COMPETING CHASSIS - The only approved frame will be the X-Y-G Tube Frame. Built from rules listed below. All frames must fit SMS X-Y-G fixtures and measurements. NO EXCEPTIONS! CHECK BEFORE YOU BUILD IT!
20F- 2.1 APPROVED COMPETITION MODELS
The following are the 2013 approved steel and or composite body models eligible for competition:
YEAR MAKE MODEL
2000 – 2005 Chevrolet Monte Carlo
2006 Chevrolet Monte Carlo SS
2001 – 2004 Dodge Intrepid
2005 – 2006 Dodge Charger
2000 – 2005 Ford Taurus
2006 Ford Fusion
2000 – 2003 Pontiac Grand Prix
YEAR MAKE MODEL
2012 Metric Ford Mustang
2012 Metric Chevrolet Camaro
2007-2013 Chevrolet Impala
2007-2013 Dodge Charger
2007-2013 Toyota Camry
2007 -2013 Ford Fusion
2007-2013 Chevrolet Monte Carlo SS
2009-2013 Chevrolet Cadillac CTS
2009-2013 Ford Lincoln MKS
2009-2013 Chevrolet Pontiac G8
2009-2013 Chevrolet Malibu
20F- 3 DETAILED BODY REQUIREMENTS –Bodies and their installations must be SMS approved. Body dimensions must remain as manufactured except for changes which may be necessary for tire clearance.
A. Cars must have complete bodies, which includes the hood, roof, front fenders, doors, quarter panels, front and rear bumper covers. The minimum thickness for any exterior sheet metal body part of the 2000 through 2006 steel body cars must be 24 gage (0.025 inch thick) magnetic sheet steel.
B. Body mounts may be solid or adjustable, and may be made of metal, plastic or Polycarbonate.
C. Installation of aerodynamic or air directional devices of any type are not permitted. Streamlining/contouring of body panels or windows is not permitted. Grilles must resemble OEM Stock in their dimension and location.
D. A full windshield and full rear window is mandatory. The windshield and rear window must be installed in their OEM Stock position, and must be sealed to the window beds using removable sealers/adhesives.
E. Fenders and quarter panels may not be modified except for wheel or tire clearance.
F. The interior area of the car must be completely enclosed from front to rear with firewalls made of not less than 24 gage (0.025 inch thick) magnetic sheet steel. The floor area on the left side must not be lower than the top of the frame rails except directly under the seat where the floor may be dropped not lower than one (1) inch above the bottom of the frame rail. The floor area on the right side of the seat may be raised a maximum of eight (8) inches to the top of the drive shaft tunnel and extend to the right door panel. All interior panels must be welded.
G. Cars must be equipped with approved front and rear bumper covers for your year/make/model. Installation of aerodynamic or air directional devices of any type are not permitted. All SMS Late Models are subject to the NASCAR LMS body measurements. SMS Officials will use NASCAR LMS templates to insure conformity. All vertical measurements listed in the NASCAR rule book are plus one (1) inch for SMS dimensioning. With the exception of the 18 ¼" minimum deck lid length, all other measurements listed that say minimum or maximum are considered as exact for the SMS Late Model division. All listed tolerances are built into the templates from the manufacturers. All listed vertical body measurements are checked with car at ride height. Older Late Models and Limited Late Models with higher roof heights will be adjusted according to the rule.
20M- 3.4 FIRE WALLS
A. Front firewall must be no further than 2.250" from the front edge of frame rails, and be made of minimum .031" magnetic sheet metal with all holes covered using sheet metal a minimum of .031" thickness. The front firewall must extend down to the top of the frame. The bottom 8.0" may angle no more then 70 Degrees, before going upward at 90 Degrees.
B. Rear firewall must be made of minimum .031" magnetic sheet metal securely installed over the rear seat back brace and top shelf or “hat rack”, completely closing off the trunk compartment.
C. The top shelf or “hat rack” must be positioned horizontal and approximately level, attaching to the #7 bar. On the driver side of the hat rack, there must be a containment area for the seat belts. This can be constructed by making a cut out 42" from the back edge of the hat rack. The inverted box should go from the top of the hat rack to the top of the #6 bar. This box should be approximately 13.500" by 8.250" and be angled at 70 degrees and must be welded in place.
D. The interior area of the car must be completely enclosed from front to rear with fire walls made of not less than 22 gage (.031 inch thick) magnetic sheet steel. The floor area on the left side must not be lower then the top of the frame rails except an area maximum 24 inches by 24 inches directly under the seat where the floor may be dropped not lower than two (2) inches above the bottom of the frame rail. The floor area on the right side of the seat may be a maximum eight (8) inches to the top of the driveshaft tunnel and extend to the right door panel. All interior panels must be welded. Door bars may not be paneled on the inside. All door bars above eight (8) inches must be visible from inside car. The floor must be sealed to the bottom of the door on both sides of the car. The rear seat area must seal to the rear firewall.
E. Door bars may not be covered on the interior of the car and must be visible for inspection from the inside of the car.
20F- 3.5 DOORS - Doors must be magnetic sheet steel. External nerf bars may be used if no larger than 1” round tubing. Bars must be “skin” tight and painted the same as the body panel it is attached to. Bars must be at centerline of the front and rear tire. No bars behind rear wheels. Ends must be turned into and go through the body or bolted at the end of the bar with a flush bolt that goes trough the body to an interior bar of the same length as the outside bar to prevent hooking. The outside bar must have the ends rounded. No spreading or narrowing of body. Replacement doors must have stock contour. No slab sided cars. B. Cars must have a magnet steel anti-intrusion plate minimum 0.090 inch thick, installed on the outboard side of the left side door bars. (See NASCAR rule book 20F-3.5-B for mounting instructions & diagram).
20F- 3.6 FENDERS - Approved composite type material only. The approved composite quarter panel and fender must be used as manufactured.
20F- 3.8 HOODS, ROOF
A. Hoods must be 2007-2012 approved composite bodies only .All panels must be flange -mounted and remain as manufactured .The hood and scoop must seal tight to the fenders and windshield. Hood must be in place at all times.
B. Hood must be held closed with quick release pins. Hinged hoods are permitted.
C. No holes or functioning air scoops allowed. Hoods must lay flat.
E. All roofs must be the same size and shape of a production roof. Steel or fiberglass roof permitted. Roof panels must be permanently mounted in the stock position the same as a stock production roof for the make and model car being used. THESE BODY PANELS MUST CONFORM TO THE NASCAR APPROVED MANUFACTURER TEMPLATES AND THE NASCAR APPROVED BODY AND COMPONENT TEMPLATES.
20F- 3.10 BUMPERS/BUMPER COVERS –
B. Magnetic steel tubing must be used to reinforce the front and rear bumper covers. The tubing that is used for the main structure of the bumper must not be exposed and must remain behind the bumper covers. A maximum of two 90 degree one and a quarter (1 ¼) outside diameter round tubing will be allowed to be added to the fuel saver bar, and connect to the bottom of the main bumper bar. These bars may be bolted or welded in place, and are the only bars that will be exposed from the bumper cover. This will be the only allowed configuration, NO EXECPTIONS!
20F- 4 GENERAL ENGINE REQUIREMENTS
THE ONLY APPROVED ENGINE FOR THE X-Y-G LATE MODEL WILL BE THE SMS SPEC MOTOR
20M- 9 ENGINE EXHAUST SYSTEM- The exhaust if exiting out the side of car must not exit through the body. It must turn down before the inside of the body. NO EXCEPTIONS !!Both exhaust pipes must be independent with no connection between them.
20H – 11.2 FRAME REQUIREMENTS
(NOTE: THE ONLY APPROVED FRAME UPRIGHTS FOR THE FRONT & REAR SUB-FRAMES WILL BE OF THE MANDREL BENT SECTIONS NO EXCEPTIONS.) ALL VERTICAL MEASUREMENTS WILL BE ON 5 INCH RIDE HEIGHT BLOCKS)
A. Main Frame
(1) A tubular magnetic steel frame must be used. Offset frames will not be permitted. The main frame side rails must be parallel and be an equal distance from the centerline of the frame. The main frame side rails must be the same size (left and right, height and width), constructed using a single tube, and must be magnetic steel box tubing three (3) inches in width by four (4) inches in height with a minimum wall thickness of not less than 1/8 inch meeting ASTM A-500 specification. The main frame side rails start at a distance of 20 inches forward of the rear axle centerline and extend forward a length of 66 inches. When measured from the outside of the left frame rail to the outside of the right frame rail, a width of 54 inches, plus or minis (+/-) 1/2 inch, must be maintained. The distance from the outside edge of the main frame side rails, left and right, must be the same, measured from the centerline of the tread width, front and rear.
(2) Sub-frame kick outs must be constructed using a single tube and must be magnetic steel box tubing three (3) inches in width by four (4) inches in height with a minimum wall thickness of 1/8 inch meeting the ASTM A-500 specification. The sub-frame kick-outs must turn in 90 degrees to the main frame side rails and be welded to the inside ends of the main frame rails. The open ends of the sub-frame kick-outs must be closed by welding caps on the ends or bolting weight containment caps. The distance from the front of the front kick-out to the rear of the rear kick-out must be 66 inches. The front kick-out must measure 86 inches from the rear axle centerline.
(3) A crossmember constructed of magnetic steel box tubing, two (2) inches by two (2) inches with a minimum wall thickness of 0.083 inch meeting the ASTM A-500 specification, must be welded between the main frame side rails at a distance of 48 inches from the rear axle centerline.
(4) All frames must have diagonal cross bracing constructed of a minimum one (1) inch by one (1) inch by 0.065 wall thickness tubing.
(5) All crossmembers and diagonal bracing must be installed flush to the top of the main frame side rails. Center of crossmembers a maximum width of 12 inches may be dropped for driveline clearance. No part of the crossmembers or diagonal bracing will be permitted to extend lower than the main frame side rails.
(6) On race tracks 3/4 mile or more in length, a rear transmission crossmember will be mandatory.
(7) If the optional tubular metric frame is used, the center to center dimension of the main roll bar #1 and the rear axle must be a minimum of 23-1/2 inches.
B. Rear Sub-Frame
(1) The rear sub-frame rails must be configured and attached in the same location on the left side and right side to the sub-frame kick-outs four (4) inches in from the outside edge of the main frame rails. The rear sub-frame when measured from the outside edge of the left sub-frame rail to the outside edge of the right sub-frame rail must measure 46 inches, and this width must be maintained for the entire length of the sub-frame. The rear sub-frame must angle rearward and upward at an angle between 45 degrees and 50 degrees to a maximum height of 22 inches from the ground (on five (5) inch blocks), then angle rearward parallel to the main frame rails a maximum distance of 16 inches, then angle down to a minimum height of 11 inches and a maximum height of 14 inches from the ground. The rear sub-frame must be constructed using magnetic steel box tubing, two (2) inches in width by three (3) inches in height, with a minimum wall thickness of 1/8 inch and must be similar in design and configuration to standard OEM automotive rear kick-ups.
(2) The rear sub-frame tail section must extend rearward at a minimum height of 11 inches and a maximum height of 14 inches, to a maximum length of 38 inches from the centerline of the rear axle. The rear sub-frame tail section side rails must be parallel to the main frame side rails and have a minimum length of 24 inches. The rear sub-frame tail section must be constructed using magnetic steel box tubing two (2) inches in width by three (3) inches in height with a minimum wall thickness of 0.083 inches.
(3) The rear sub-frame must incorporate the mounting locations for the rear springs, shock absorbers, panhard bar, and fuel cell, ending with a crossmember constructed of magnetic steel box tubing two (2) inches in width by three (3) inches in height with a minimum wall thickness of 0.083 inches a maximum length of 38 inches from the centerline of the rear axle.
(4) A reinforcement bar, made from round magnetic steel tubing, minimum 1-1/2 inches in diameter with a minimum wall thickness of 0.083 inches, must extend below the rear sub-frame section behind the fuel cell. This reinforcement bar must be as wide as the rear sub-frame rails and extend as low as the bottom of the fuel cell with two (2) vertical uprights evenly spaced between the sub-frame rails and attached to the rear crossmember. Two (2) support bars, one (1) located on each corner, must angle upwards and be welded to the rear sub-frame side rails. (See the Construction Guidelines in the rear pages of the Rule Book)
(5) Weight containers, if used, must only be attached to the inside of the frame rails and must not be lower than the bottom of the frame rails.
(6). The back of the rear sub frame from the center line of the rear end may be mitered to conform to the rules stated above. (This will be the only mitered section allowed, excluding the front radiator support.) After the car is built, if the rear sub-frame has to be repaired, a mitered section will be allowed. NOT THE FRONT. NO EXCEPTIONS.
C. FRONT SUB-FRAME
The front sub-frame must be constructed by the following guidelines:
ALL VERTICAL DIMENSIONS WILL BE ON FIVE (5) INCH RIDE HEIGHT BLOCKS
Many Dimensions will come from a front frame kick-out that is eighty six (86) inches from the rear axle centerline constructed of three (3) inches wide by four (4) inches magnetic steel tubing with a minimum wall thickness of 0.125 inch meeting ASTM A-500 specifications. The GM-METRIC TUBULAR mainframe width will be an O.E.M. dimension of fifty four (54) inches from the outside of the left frame rail to the outside of the right frame rail and a length of sixty six (66) inches starting at a point eighty six (86) inches forward from the rear axle centerline constructed using three (3) inch wide by four (4) inch high magnetic steel tubing with a minimum wall thickness of 0.125 inches.
(1) A GM-METRIC type front steer tubular front sub-frame must be constructed using two (2) inch wide by four (4) inch high magnetic steel tubing with a wall thickness of 0.125-inch meeting ASTM A-500 specifications. The front sub-frame rails must be parallel to each other both vertically and horizontally. The front sub-frame rails must be parallel both vertically and horizontally to the mainframe rails from the jack bolts forward. All front steer assemblies must maintain a dimension of 31 inches from the center of the left side frame rail to the center of the right side frame rail at a point from the jack bolt extending forward in front of the steering assemblies. Spring bucket and jack bolts may be cut into left side and right side frame rails. Top of spring buckets will maintain a vertical height of 15 1/4 (+/-) 1/2 inch. Jack bolts will maintain a centerline distance of 33 1/2 (+/-) 1/2 inch measured at top of spring bucket from left side to right side and be located equal distance from centerline left and right. A distance of 21 inches (+/-) 1/4 inch must be maintained from the front frame kick-outs forward to the jack bolts centerline. Jack bolts will be allowed a maximum angle of five (5) degrees from vertical. The front sub frame rails may angle outwards and downwards from the jack bolts to the front frame kick-out to a maximum distance of 41 inches. If frame rails are angled outward a wishbone made from round magnetic steel seamless tubing 1½ inch by .083 minimum wall thickness meeting ASTM A-519 specification must extend from dash bar #8 to an area at the rear lower a-frame mount and continue to connect at an intersection of roof support bar #12 and diagonal bar # 7A. The front frame extensions using two (2) inch wide by three (3) inch high minimum wall thickness of 0.083 inch magnetic steel tubing meeting ASTM A-500 specifications must angle out and forward and extend a distance of twelve (12) inches forward of the forward most top steering box bolt to a minimum distance of 33 inches from the center of the left side frame rail extension to the center of the right side frame extension. This forward top steering box bolt will be a horizontal distance of 39 inches from the front frame kick-out and a vertical height of 15 inches (+/-) 1/2 inch. (Steering box bolt location will be inspected with a fixture that will read zero (0) degrees with the frame on five (5) inch ride height blocks). At a point four (4) inches in front of the top steering box bolt a two (2) inch wide by four (4) inch high magnetic steel tubing with a minimum wall thickness of 0.125 inch meeting ASTM A-500 specification must extend rearward a distance of 34 inches than angle down 30 degrees to the front frame kick-out. A distance of 24½ (+/-) 1/8 inch must be maintained from the front of the sub-frame kick-outs to the center of an O.E.M. three quarter (3/4) inch pin boss located on the mainframe centerline at the front of the front sub-frame crossmember. O.E.M. pin boss will be used for locating inspection fixtures. The front sub-frame crossmember must be mounted at the centerline of the front sub-frame at a 90 degree angle to the main frame side rails against the back of the ¾ inch pin boss and be constructed using two (2) inch high by four (4) inch wide magnetic steel tubing with a minimum wall thickness of 0.125 inches meeting the ASTM A-500 specifications. A minimum thickness of one hundred thousands (0.100) 12ga.magnetic steel must be used to construct the remainder of the front sub-frame crossmember. The front mounting points for the front lower a-frames must be constructed using a minimum 3/16 inch thickness magnetic steel. The front mounting points for the front lower A-frames must be 9 3/8 inches, measured from the centerline of the front sub-frame to the centerline of the mounting bolt at the front side of the mount and a vertical height of seven (7) inches (+/-) 1/4 inch. The rear mounting points for the lower A-frames must be constructed using a minimum 3/16 inch thickness magnetic steel. The rear mounting points for the lower A-frame must be 13 inches (+/-) 1/4 inch measured from the centerline of the front sub-frame to the centerline of the mounting bolt at the rear side of the mount and the vertical height will be 6 7/8 inches (+/-) 1/4 inch. Adjustable insert slugs may be used on the rear mounting bolt to maintain a distance of 22 inches (+/-) 1/2 inch from the center of the lower ball joint to the leading edge of the mainframe side rail and kick-out. A 1/2 inch round by 15 inch long solid steel pin must pass freely through these points during inspection. When measuring either the right side or left side the distance from the centerline of the bottom ball joint to the centerline of the sub-frame must be equal. The mounting plates for the upper A-frames must be welded to the top of the sub-frame rails and be parallel with the centerline of the sub frame rails. A distance of 37 inches will be maintained from the top idler arm bolt centerline to the front frame kick-out with a vertical height of 14 inches (+/-) 1/4 inches. The GM-METRIC TUBULAR REPLACEMENT FRONT SUB-FRAME MUST WEIGH A MINIMUM 95lbs. A bare front sub-frame must be submitted to track officials for weigh in and approval. Front sub-frame must be acceptable to SMS track officials before it can be used in competition.
(2) Approved Front-sub frames are Johnson Chassis Part # JCI 09-011 and Part # GHC-54108-Hamm’s Welding.
20M -18 ROLL BARS- Roll Cage #1 bar must be located a minimum distance of 22-1/2 inches and a maximum 24-1/2 inches forward of the rear axle centerline. Roll bar #1 must be in the same location on the left side and Right side. SMS Track Officials may request an access hole be added or any obstructions be removed to acquire a straight line measurement from the back of Roll bar # 1 to the centerline of the rear axle. The main roll bar must be mounted vertical (90 degrees) on the center section of the frame with no offset or setback. The #1 bar must be centered to the chassis. The roof bar (referred to as #3) must be within 4” of the side window and/or door openings on both sides, as well as the front windshield. All roll bars must follow the contour of the body. The #2A & #2B bars must be no more than two (2) inches behind the length of the A-pillar in the stock location. Positively no offset roll cage !!!!
A diagram will be available for builders.
NOTICE – Competitors are solely and directly responsible for the safety of their race cars and racing equipment and are obligated to perform their duties (whether as a car owner driver or crew members) in a manner designed to minimize to the degree possible the risk of injury to themselves and others.
NOTE: ALL VERTICAL BODY MEASUREMENTS ARE AT RIDE HEIGHT WITH DRIVER AND ALL VERTICAL FRAME MEASUREMENT ARE ON 5" INSPECTION BLOCKS NO EXCEPTIONS.
CONTINGENCIES - Contingency Sponsors are a valuable part of Stafford Motor Speedways program. Contingency stickers musty be displayed for either product or monetary considerations. Each division will be notified as to what stickers are required to be eligible for contingency rewards. The stickers MUST be displayed on both sides of the car. In particular, the decals must be mounted on the driver’s side of the car in such a manner that they are CLEARLY VISIBLE in a photograph.