2024 Super Truck Rules (Subject to Change) COMPETING MODELS: 1996-2023 truck models with wheelbase of 110-112 inches. Trucks with 108 and 109 inch wheelbase must add 25 lbs. to right side. Tread width of 65 1/2 inches +/- 1/2 inch as raced. TRUCK BODIES: Front and rear windshields must be lexan. No side or quarter windows. May run window vent behind A post, maximum 9” long. Speedway approved window net must be installed in the driver’s side window opening. Body height minimum 4 inches, roof height minimum 56 inches with driver measured 10” behind windshield. Rear Spoiler height maximum from the ground– 44”. ALL BODY HEIGHTS, ENGINE, FUEL CELL, AND REAR SPOILER HEIGHTS WILL BE CHECKED ON 4 INCH BLOCKS. Rear spoiler 5” high with maximum 60” width. Spoilers may have adjustable braces. Rear spoiler angle must be the same across the spoiler. Rear spoiler must be centered on the truck, no offset to one side. No added materials to quarter panels behind the rear wheels. Wrecker hookup required on front and rear of truck. Rear bumper cover must be complete and fastened to the rear bumper bar. No cutting of bumper cover. There will be a measurement from rear axle across quarter panel to farthest end of rear bumper and this measurement will be a maximum 51" with 112” wheel-base. The only ducting allowed under the front of the race truck will be for the radiator. This duct work must not be wider than and must not extend past the radiator. All body parts must not exceed the outside edges of the tires on the truck, front or rear except for the front bumper cover. The truck body must not be skewed on the truck. All bodies must be centered on the vehicle. The front windshield angle must be no less than 35 degrees when checked in the middle. For driver safety, insulation will be allowed around the driver area and foot box for heat reduction. FRAME: Tubing front sub frame allowed. Stock OEM front sub frame allowed. Frame rails minimum 2”x 3” x .083 wall thickness between wheels. Frames must be perimeter style. Front and Rear sub-frames must be centered to roll cage. Cage must have at least 4 door bars on both sides. All bars must be as at least 1 ¾ inches x .083 tubing. Driver’s door bars must be covered by steel plate. Must have 1 ½ “ windshield bar. All bars within driver’s reach must be padded. Roll cage must be at least 43” tall when measured from top of frame rail to top of roll cage. The roof halo bar must be a minimum of 37” outside to outside. Anything less than 37” will have to add 25 lbs to right side and to the total weight. A steel interior must separate the driver from the engine compartment and fuel tank. Floorboard may be raised ten inches to the drive shaft tunnel to the top of the door bar and seal off to allow clearance for headers. No boxed interiors. A complete speedway approved roll cage. Roll cage must be centered on the main frame rails. Perimeter style. If your truck has an offset chassis, and there have been no additions to make it a perimeter style, you must add 25 lbs to the right side and total weight. The right side door boors must match the left side door boors extruding out. If you have both a narrow halo bar and an offset chassis then you will have to add 40 lbs to the right side and total weight instead of 50 lbs. FRONT SUSPENSION: Coil-over suspension allowed. Screw Jacks allowed on front and rear Fabricated spindles allowed. One piece billet spindles will NOT be allowed. Lower A-frames may be Fabricated or aftermarket. Front lower control arms may be strut rod. Upper A-frames may be fabricated. Front sway bar may be OEM or Aftermarket design. No titanium suspension parts allowed. STEERING: Rack and Pinion steering allowed. OEM type steering and steering box allowed. Steering components may be aftermarket. Any type of steering or power steering allowed. REAR SUSPENSION: Three link, leaf spring or truck arm suspension allowed. A metal fabricated pan-hard bar is allowed. Damper shock permitted on rear suspension. Rubber bushing, metal bushing, teflon bushings or heim joints allowed. Three link lower trailing arms may be metal tubing. Truck arms must be magnetic steel. Rear sway bar not permitted. No Titanium rear suspension parts allowed. All rear suspension parts must be one solid piece with no moving parts. REAR END: Rear end may be car, truck, floater, or standard quick change. No cambered rear ends. +/- .4 Grace. No aluminum tubes. No aluminum yokes. Detroit Locker or spool only. No torque limiting devices allowed. Only steel third members (9 inch chunks) allowed. No titanium rear end parts allowed. Chains or cables on the rear end to stop traveling when jacked up must be installed with bolt and lock nut. No quick release pins will be allowed. When jacking the car up, the frame must jack up a minimum of 2 inches before the tire clears. If not connected on both ends, it must be removed before you race. SPRINGS and SHOCKS: For all NASCAR Advance Auto Parts Weekly Series book for specifics on springs allowed. May use bump stops on front only. SHOCK ABSORBERS (Section 1-Z) A. Shock absorbers and components must be from an approved manufacturer. The approved shock absorbers will be of the revalvable, rebuildable, gas pressurized, mono-tube, deflective disc valve type with an integral gas reservoir. Shock absorbers must provide a resultant force dependent upon piston velocity and must be acceptable to Track Officials. Shock absorbers and components must be used as supplied by the manufacturer and all components must be used in only their respective manufacturers’ shock absorber. Modifications or changes to the shock absorber and internal components will not be permitted. Shock absorbers and components must be available to all Competitors and must meet the following requirements. As per local Track Rules, oil type shock absorbers will be permitted. Specifications and rules for these oil type shock absorbers will be developed, implemented, governed, and enforced by the individual Track Rules. B. The approved shock absorbers and components are as follows: Penske 7500 Series with only the approved Penske Digressive, Linear and High-Flow Pistons Bilstein ASN, SN or AS2 Series with only the approve Bilstein Linear U37T Series Pistons #423171 and #403556 C2P NAEX Series with only the approved Linear #62070 and Hi-Flow #40094 Pistons Advanced Racing Suspensions 4000 Series with only the approved #40094 Piston PRO PG Series with only the approved Linear/Linear #63 Piston JRI ST/08 Series with only the approved #3803-15 Piston Blackmagic Shocks (Shadow Racing Products) BML Series with only the approved BML Linear Piston In addition, AFCO and PRO shocks will be legal WITHOUT base valves. C. Changes in shock absorber force must not be made by the position of the shock absorber shaft, only by the velocity of the shaft through the compression and rebound stroke. D. Track Officials may use a shock absorber and internal components provided by the respective manufacturer as a guide in determining whether a Competitor’s shock absorber and internal components conforms to the specification of the Rule Book. E. The only shock absorbers and internal components permitted will be those approved by NASCAR and Track Officials. NOTE: The internal bore of the shock absorber body must remain as supplied by the manufacturer. The internal bore diameter of the shock absorber body must be the same from top to bottom. Tapers, steps, grooves, and other misalignments will not be permitted. Modifications which provide position sensitive piston travel will not be permitted. F. Shock absorber base valves will not be permitted. G. “Steel” deflective disc valve shims must seal the primary metering faces of the single piston in the main shock body. The only shims permitted will be those manufactured, produced and/or recommended by the specific shock absorber manufacturer. Shims must be used in only their respective shock absorbers. Ring shims and bleed shims will be permitted. Floating shims will not be permitted. The shim stack must be of the single pyramid type with the exception that multiple shims of the same size may be stacked together. The inside diameter of the shims must match the shaft diameter with the exception of the outer ring of the ring shim. H. Only a single one-piece piston is permitted in the main body with one (1) shim stack on the compression side, and one (1) shim stack on the rebound side. A maximum of three (3) bleed holes may be drilled in the piston. If bleed holes are drilled into the piston, they must be drilled into the port of the piston only. The only pistons permitted are the Linear and High-flow pistons that were submitted by the manufacturer and approved by NASCAR. The piston band must be the original band for the approved manufacturers piston. The piston band and piston band groove in the piston must remain the standard size and must not be altered. I. One-piece open style jets that bleed equally in both compression and rebound will be permitted. One-piece jets that control flow in compression only or rebound only will be permitted. Solid plugs in place of open jets will be permitted. Plugs with fixed bleed holes will be permitted. Check ball jets that control flow in compression or rebound only will be permitted. J. The gas reservoir maximum outside diameter must not exceed 2.300 inches. External shock absorber gas reservoirs will not be permitted. K. The single floating divider piston in the integral gas reservoir must be installed to the manufacturer’s specifications without any modifications. L. The gas reservoir must not be filled with any material other than in an inert gas form. Oils or any other types of liquid or materials that are not approved by NASCAR or Track Officials will not be permitted in the gas reservoir side of the shock absorber divider piston. M. The shock absorber nitrogen gas pressure must not be less than 50 psi or greater than 150 psi. Gas pressure will be measured at ambient temperature (not to exceed 100 degrees Fahrenheit) by temperature monitoring devices used by Track Officials. Gas pressure will be checked with the shock absorber removed from the race vehicle and fully extended. AZer being charged, at any time, the shock absorbers must fully compress and fully extend the entire length of the shock absorber shaft with the external adjustment (if used) set in any position without any type of mechanical assistance. An external Schrader valve, needle valve, etc. will be required to pressurize the shock absorber with gas. The competitor must have the equipment required to adapt to the technical inspection equipment to check the gas pressure in the shock absorber. N. Oils that the viscosity can be changed by any type of electro-magne5c field or by any other means will not be permitted. O. Shock absorber shaft diameter must not exceed 0.630 inch and the shaft must not have any sleeves or spacers that could limit the travel of the shaft into or out of the main body. Shock absorber shafts must be solid on all non-adjustable shock absorbers. When single adjustable shock absorbers are used hollow shock absorber shafts will be permitted. P. Suspension travel must not be limited by the shock absorber and/or components, or shock absorber mounting location. Q. Coil over shock absorbers will be permitted. R. Remote or electronically controlled shock absorbers will not be permitted. S. A maximum of one (1) shock absorber per wheel will be permitted. T. Quick disconnect shock absorber mounts will not be permitted. The shock absorber must be attached with positive nut and bolt mounting fasteners. Adjustable shock absorber mounts of any type will not be permitted. Shock absorbers must be mounted on the vehicle with the gas reservoir to the top. Shock absorber eyelets of different lengths will be permitted but must not limit the travel of the chassis. U. Shock absorbers will not be permitted inside of the front or rear coil springs, with the exception of the coil over type springs. V. All rear shock absorbers must be mounted behind the rear axle housing. W. The rear shock absorbers must not angle inboard towards the center of the vehicle more than 30 degrees from vertical. X. Heating pads and/or blankets will not be permitted for warming the shock absorbers. Y. Shock absorbers and internal components are subject to inspection at any time by Track Officials. Z. It is the responsibility of the driver, not NASCAR or Track Officials, to ensure the shock absorbers are used in accordance with the manufacturer’s instructions and specifications. BRAKES: Single or Multi piston metal brake calipers permitted. Steel disc brakes may be used on front and rear. All 4 wheels must work. No titanium brake parts allowed. ENGINES: ENGINES ALLOWED 602 CHEVY CRATE must run with a 390 cfm carburetor with no engine modifying of engine parts. 603 CHEVY CRATE must run with a 390 cfm carburetor with no engine modifying of engine parts. 602 AND 603 CHEVY CRATE must run with a 500 cfm carburetor when use rocker arm GM part # 19210724 and adjuster nut part # 88961233 or Scorpion 1.5 rocker arm part #scp1035 with matching adjuster nut. And replacing harmonic balancer with GM part #12551537. And when changing valve springs with competition Cam #2697516. 604 CHEVY CRATE must run a 500 cfm carburetor. The Holley Ultra XP 500 cfm will not be allowed. Ford 347 JR CRATE must run 390 cfm carburetor. Ford 347 SR / 347 SR7 CRATE must run 450 cfm carburetor. The Ford 347 SR7 crate must run a 7000 RPM chip. Ford, Chevy and Dodge Late Model Stock built engines must run a 450 This engine package may run the 450 carb with any 1” aluminum tapered spacer. 70CC engines must run a 500 cfm carburetor. The Holley Ultra XP 500 cfm will not be allowed. This engine package may run any 1” aluminum tapered spacer. 70CC engine rules : Only stock production engines allowed. Chevrolet 350, Ford 351. Chrysler 360 cubic inches are maximum allowed plus over bore. No coating or polishing inside of block. Overbore of .060 + normal wear permitted. Aftermarket solid steel connecting rods permitted. No polishing or machine work will be permitted. Flat top 3 ring pistons permitted. Piston must not extend above top of block. Crankshaft with stock stroke must be retained. No excessive grinding or machining, just for balancing purposes only. Subject to template inspection by tech official. Crankshaft must not be knife edged. Minimum weight is #50 pounds for crankshaft. Wet sump oil system only. Aftermarket pulleys allowed. Enlarged oil pan allowed. Kick outs will not be allowed between the bolt holes flange and the top of the added sump. HEADS Stock OEM steel heads only. World Products Stock Replacement Head allowed. No vortec heads on built motors, no angle plug heads allowed. No angle cutting heads. No modifications, no porting or polishing. No grinding of any king. 3 angle valve job ok as per speedway rule. One cut below valve seat, to bottom of valve guide. Do not radius or blend bottom of cut below valve seat. Chevrolet 70cc minimum; Ford (Clev) 68 cc minimum; Ford (win) 58cc. Stock OEM valve size only. Valve size maximum: Chevrolet 1.90 intake 1.5 exhaust, Ford Cleveland 2.05 intake 1.65 exhaust, Ford Windsor 1.89 intake 1.6 exhaust. CAMSHAFT Hydraulic or flat tappet cam and OEM diameter lifters with maximum lift of Chev .480, Ford .512 at valve with valve lash as ran in race. Hydraulic lifters will be measured at the retainer after replacing hydraulic lifter with a solid lifter and zero lash. INTAKE AND SPACER GM performer 2101 current design, FORD M2924-P No porting, polishing, or grinding will be permitted. Do not touch it. Holley #4412 carb 2bbl spacer must have 2 holes with max 1 11-16” openings. May run the same spacer on the 500 or the 450 carbs. Holley 390 cfm carb is allowed a 1” solid aluminum spacer with four holes or open spacer. Holes must centered and cut perpendicular with the base of the carburetor. No tapers Only 2 gaskets, 1 per side, maximum thickness .056 will be permitted. No adjustable spacer will be permitted. All carburetors and spacers plates must meet speedway specifications. CRATE ENGINES: The Following Crate Engines must be used as supplied from factory manufacturer. These engines are subject to tear down procedures and legalities is determined by tech committee. The staff at Florence Motor Speedway has invested a lot of time and money to be “up to date” on these engines, therefore make sure the engine is legal or it will be caught. These engines may require different size carbs to equal horsepower between different model #. GM #602 Ford# 347JR FORD#347 SR GM #603 GM#604 These engines are designed to cut the cost of racing. Anyone found tampering with these engines will be fined up to $1000 for each offense and loss of championship points. Crate Motor is a great application for Local Racing if the competitor will leave them alone. Run them as supplied from the factory to ensure legality. Contact Tech Official if you need clarification to this rule. GM Crate Engines can change valve covers and distributors. GM crate engines may run aftermarket valve springs with the same diameter, same installed height, and same open pressures as stock crate springs. BUILT ENGINE RULES: ALL BUILT ENGINES BY NASCAR LATE MODEL STOCK CAR RULE BOOK CARBURETOR All carburetors are by NASCAR rule book from past years. The Holley Ultra XP will not be allowed. GM #88958602 Crate engine may use: Holley HP80507-1 390 four-barrel carburetor. GM #88958603 ZZ4 Crate engine may use: Holley HP80507-1 390 four-barrel carburetor. With crate engines the way it comes from GM 602 and 603 GM crates with modified engine in rules above must run a 500 carb. GM #88958604 Crate engine must use: Holley 2bbl “500″ 70CC Engines must use Holley 2bbl “500” Ford 347 JR Crate Engines: 347JR - Holley HP80507-1 390 four-barrel carburetor Ford 347 SR Crate Engines: 347 SR -Holley 2bbl “450” A “450” carburetor is an old-style Holley 500, model number 4412, 350 base plate including the two blending rings in the bottom of the venturi. The built engine package, Line 7 in “Engines Allowed,”, may run the 450 and any 1” aluminum tapered spacer plate. The 70 cc package, Line 8 in “Engines Allowed,” may run any 1” aluminum tapered spacer plate. AIR CLEANER: Round air cleaner element minimum of 12 inches; maximum of 17 inches in diameter permitted. Front facial may only be half the diameter. Top and bottom of air cleaner must be the same size. Element must be minimum of 1 ½ “and a maximum of 4 inches in height. Dry type paper element only. No tubes, funnels or anything which may control the flow of air are permitted. The base of air cleaner cannot extend higher than carburetor choke horn. Base of air cleaner on 4-barrel carb no more than 1 ½”above mounting ring of carb. No cold air boxes or cowl induction allowed. TRANSMISSION and FLYWHEEL ASSEMBLY: Automatic, or 4 speed transmissions permitted. May be interchanged. All gears must be in working order. 2-speed or 3-speed transmissions, or “speed” transmission allowed. Must add 50 lbs to overall weight for 2 speed transmission. No centrifugal clutch transmissions allowed. All trucks must run a steel flywheel in original location. A metal multi-disc clutch allowed. Minimum disc diameter 5 ½”. Hydraulic clutch control permitted. Blow proof bellhousing required. Must have speedway approved scatter shield. No reverse mount starter. Bottom of bell housing may be cut for clutch service, inspection and ground clearance. Driveshaft may be steel or aluminum. Driveshaft must be painted white or silver with safety loops attached to the bottom of truck. EXHAUST: Headers will be permitted. H-pipes allowed. Header wrap or coating allowed AROUND DRIVERS COMPARTMENT. Cast iron manifolds permitted. All LS exhaust must exit behind the driver. ENGINE LOCATION: Engines may be interchanged from one body manufacturer to another. Chevrolet engine must be centered in chassis (+/- ½”) and center of #1 spark plug hole in head may be setback 2” maximum with the upper ball joint as ran in race. Ford and Dodge may be set back a maximum of 4 inches from center of spark plug hole in head from upper ball joints on the driver side. Ford JR 347 and SR 347 crate and Chevy 602, 603, and 604 crates may be set back 2” from center of #1 spark plug hole from upper ball joints. Minimum crankshaft height is 12”, measured from the center of crank pulley to the ground on all models with driver in truck in center of seat with steering wheel on steering shaft. COOLING SYSTEM: Aluminum radiators permitted. Internal or External oil cooler allowed. All trucks must have overflow hose. Antifreeze is not permitted. (SEE GENERAL RULES FOR FINE) Electric fans are permitted. ELECTRICAL SYSTEM: Electronic ignition allowed. Distributor may be welded or locked. Only 1 stock appearing coil permitted. Aftermarket distributor allowed on all engines. All Distributors maybe welded or locked on all engines. Only one 12-volt battery permitted. Stock firing order required. Only one MSD ignition box permitted. No magnetos. No adjustable timing controls. MSD claim rule, $300 by speedway or any driver that completed the truck series race. Ignition box must be visible and out of the reach of the driver. REMOVED: Starter must mount in original location. No open-ended wiring in the driver’s compartment. Tachometer must be able to unhook. No digital readout gauges. Any type traction devices are not allowed. No computerized systems are allowed. All ignition systems must be acceptable to speedway officials. FUEL and FUEL SYSTEM: Speedway fuel is the only fuel allowed. No mixtures of any kind. All Fuel must pass Speedway Fuel specifications. Fuel must be same color. Fuel cells are mandatory and mounting of them must be speedway approved for safety. Fuel cells must be securely strapped down with no less than 1/8” steel straps. The maximum capacity allowed is 22 gallons. Fuel cells must have 8” minimum ground clearance. Fuel cell must be mounted in approved steel can. Fuel cell must be mounted in the center of frame rails. After a main event you may only add 10 gallons of fuel. No fuel cooling devices allowed. WHEELS and TIRES: 10” Maximum width. 15” Steel wheels only. Air bleeders will not be permitted. Tires used for qualifying and race must be approved by the speedway. Any truck tires from any source other than speedway supplier will be disqualified, a $500 fine imposed. No chemical tire treatment allowed. Durometer and sniffer enforced. F45 Hoosier Tires is the class tire for the 2020 season. Serial numbers are recorded to make sure you race the tires that are drawn. WEIGHT: Trucks with 602 can weigh- 2825 pounds total weight with driver/1225 pounds minimum right-side weight with driver. All trucks will weigh unless otherwise stated in this rule book- 2850 pounds total weight with driver/1250 pounds minimum right-side weight with driver. Straight Rail Chassis will weigh- 2900 pounds total weight with driver/1300 pounds minimum right side weight with driver. (50lbs of it must be bolted center bar right door) ********************************************************* ADDITIONS: All trucks will be weighed with the driver in a driving position. May fuel up with 10 gallons only after race. All trucks must have the weight on the back of hood for tech purposes. Weight of trucks may be increased or decreased to assure an equal race program. All lead weight must be added to the chassis securely. No tungsten allowed. Penalty of $2.00 per pound for any lead lost on race-track and loss of lead. If a track official addresses a rule infraction that you cannot fix within a race event, you must add 25 lbs on the right side for the next race event. Failure to do so by the following event will result in an additional 25 lb penalty. Twenty-five (25) pounds must be added each week until the issue is fixed. AMENDMENTS: These rules are subject to amendments for competition when ample notice has been given by the speedway. Speedway officials may use professional judgment for any rule or infractions for a competitive race program. Any truck that does not conform to any of the above rules may be required to add weight and/or restrictor plate determined by the tech committee. Speedway reserves the right to approve any engine parts, chassis or body parts that were approved for use in the LMSTS that began in 1996. FMS Rules Click on Icon for Rules Next Event Click Image For More Info Contact FMS ADDRESS 836 E Smith St, Timmonsville, SC 29161 PHONE (843) 919-0586 EMAIL firstname.lastname@example.org Name Please enter your name. Email Please enter a valid email address. Phone Please enter a valid phone number. 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