2024 Charger Rules

(Subject To Change)

COMPETING MODELS: 

1970-2023 rear wheel drive cars with a minimum wheelbase of 104” Wheelbase.

CAR BODIES:

  1. Stock or aftermarket LMSC legal steel or composite bodies only. Camaro and Mustang per SELLM Series specs.
  2. All bodies must meet roof and spoiler height template specifications per LMSC rule.
  3. All bodies must be approved by speedway.
  4. All cars must be painted and lettered professionally.
  5. Rocker panels may be fabricated but must maintain 4” ground clearance.
  6. Front windshields must be full Lexan. Back window optional. Clear Lexan or Plexiglass may be installed in the rear quarter windows. No side windows.
  7. Speedway approved window net must be installed in the driver’s side window opening.
  8. All body heights and frame heights must be a minimum of 4 inches and can be checked at any time with driver in the car, as it comes off the track. (This includes all frame, side skirts, and nose.) The car will not be raised to be put on blocks, as it must be presented to tech higher than the minimum of 4 inches with no more than 20 lbs of air in the left side tires and 30 lbs of air in the right side tires.
  9. On all approved 2007-2019 models, the rear spoiler must not exceed five (5) inches in height, 54 inches in width, and be centered on the car. The maximum rear spoiler height from the ground to the top of spoiler will be 39".  The spoiler angle must be between 50 - 60 degrees.
  10. On all approved 2020 models, the rear spoiler must not exceed five (5) inches in height, 64-1/2" in width, and be centered on the car. The maximum rear spoiler height from the ground to the top of spoiler will be 39-7/8". The spoiler angle must be between 50-60 degrees.
  11. Wrecker hookup required front and rear of car.
  12. The new Late Model Stock Car body will be allowed for competition in this class.

FRAME:

  1. Stock OEM front sub frame with tubing frame connector allowed.
  2. OEM stock clip must have factory OEM mounting points for weight break. Rear trailing arm mounts may be fabricated.
  3. Frame rails minimum 2”x 3”.
  4. A Steel firewall must separate the driver from the engine compartment and fuel tank.
  5. All body heights and frame heights must be a minimum of 4 inches and can be checked at any time with driver in the car, as it comes off the track. (This includes all frame, side skirts, and nose.) The car will not be raised to be put on blocks, as it must be presented to tech higher than the minimum of 4 inches with no more than 20 lbs of air in the left side tires and 30 lbs of air in the right side tires.

ROLL CAGE:

  1. A complete speedway approved roll cage.
  2. Roll cage must be constructed of roll bar tubing with a minimum outside diameter of one and half 1 ¾” inches x .090 wall thickness.
  3. Roll cage must be centered on the frame. Perimeter style.
  4. Main roll cage uprights must be on top of outside frame rails.
  5. Full cage is required with four uprights and four top bars.
  6. Roll bars may go through front and rear firewalls.
  7. Minimum of four bars in driver’s and passenger’s door required.
  8. All bars within drivers reach must be padded.
  9. Drivers’ door bars must be plated with 1/8” steel LMSC style.

SUSPENSION:

  1. All suspension components must be in compliance with the NASCAR Advance Auto Parts Weekly Series rule book.
  2. OEM type steering box. Aftermarket tie rods, center-link, idler, pitman arm, allowed. No rack and pinion.
  3. No one piece billet spindles allowed.
  4. The front sway bar may be OEM or aftermarket. Mounting points may be aftermarket. The front sway bar must have a maximum of no more than 1.5” size diameter.
  5. Steel rear lower trailing arms required.
  6. Rubber bushing, metal bushing, Teflon bushings or heim joints allowed. Whichever bushing is used, it must be the same on both sides.

REAR END:

  1. Rear-end may be car, truck, or floater. Any ratio. A standard quick change will be allowed.
  2. Detroit Locker, or locked rear end only.
  3. No Cambered Rear End Housings. +/- .4 Grace
  4. 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:

  1. For all NASCAR Advance Auto Parts Weekly Series book for specifics on springs allowed.
  2. Bump stops, coil binding, or any travel limited devices will not be permitted.
  3. Only one (1) spring rubber insert will be allowed per spring. The spring rubber must not exceed one (1) full coil and be acceptable by Track Officials. Coil spring wire wrap will not be permitted.
  4. Shocks may be claimed by any Charger driver finishing in the race for $325.00 cash each. Shocks to be claimed must be in writing to officials with cash within 10 minutes after the race. The team performing the claim must finish on the lead lap and can only protest within 5 positions of the finishing order. The car that has their shock(s) being claimed has 10 minutes to make a shock claim to the team filing the original claim from the time it has been presented.
5. SHOCK ABSORBERS (Section A-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:

  1. Single piston metal brake calipers required. All 4 wheels must work.
  2. Steel disc brakes may be used on front and rear.
  3. Aftermarket brake and clutch pedal allowed.
  4. Dual master cylinder allowed. Any type Brake bias adjusters allowed. 

WHEELBASE and TREADWIDTH:

  1. All vehicles must compete with a wheelbase of 105”. Both sides must be between a minimum of 104 ½” and a maximum of 105 ½”. Any device or procedure which has the ability to dynamically change the wheelbase beyond normal travel parameters will not be permitted.
  2. Vehicles must not exceed the maximum allowable tread width of 64 ½”, front and rear, measured at the center of the tire, zero toe in, at spindle height. Tread width may also be measured at the outside of the left side wheel bead to outside of the right side wheel bead and must not exceed 74 ¾”. A tolerance of ½” will be permitted between the front tread width and rear tread width, but the tread width must not exceed 64 ½”.

CRATE ENGINE chev#88958602, chev#88958603, chev#604, ford#347jr

  1. These Crate engines can be used as all supplied parts from factory manufacturer including gaskets. With or without seal bolts on engine. These engines are subject to teardown procedures and legalities determined by tech committee.
  2. Crate engines are designed to cut the cost of racing. Anyone found tampering with these engines will be fined up to $1000.00 for each offense and loss of points.
  3. Run them as supplied from the factory to ensure legality. Contact Tech Official if you need clarification to this rule.
  4. Aftermarket valve covers are the only part that may be changed on the crate engine.
  5. 602 Crate engines will be allowed to run oil pans off of the GM 603 engine.
  6. 604 Crate engine rules will be directed to the NASCAR rule book.
  7. Ford 347JR Crate engine rules will be teched per Ford specifications. There can be NO changes or modifications made except to Ford factory tolerances.

ENGINE:

  1. Only stock production engines allowed. Chevrolet 350 cubic inch maximum, Ford 351 cubic inch, Chrysler 360 cubic inch plus overbore.
  2. No Chevrolet 400 cu.
  3. No polishing or coating inside of block.
  4. Overbore of .060 permitted.
  5. Only solid steel connecting rods permitted. No polishing or machine work will be permitted.
  6. Flat top or dish 3 ring pistons only. Piston must not extend above top of block.
  7. Crankshaft with stock stroke must be retained. Minimum weight 50lbs.
  8. Crankshaft must not be Knife-edged. No excessive machining or grinding other than balancing. No drilled main journals. Subject to template inspection by Tech Official.
  9. Wet sump oil system only.
  10. Enlarged oil pan allowed. Kick outs will not be permitted between the bolt holes flange and
    the top of the added sump. Oil pan 4” minimum ground clearance.
  11. No electric fuel pumps allowed.
  12. Aftermarket valve covers allowed.
  13. Aftermarket pulleys allowed.

HEADS:

  1. Stock OEM production steel heads only.
  2. No Vortec heads on built engines.
  3. NO modifications, no porting, polishing, or angle milling. No grinding of any kind. 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.
  4. Chevrolet 70cc minimum; Ford (Clev) 68cc; Ford (Win) 58cc; Chrysler 68cc minimum.  OEM valve size for cylinder head required. Steel valves required. Valve size maximum:
    Chevrolet 1.94 intake 1.50 exhaust
    Ford Cleveland 2.05 intake 1.65 exhaust
    Ford Windsor 1.89 intake 1.60 exhaust
    Chrysler 1.90 intake 1.60 exhaust

CAM SHAFT: 

  1. Hydraulic or flat tappet cam and OEM diameter lifters with a maximum lift of Chev .480, Ford .512 Dodge .500 at valve with valve lash as ran in race. Lift will be measured at the retainer.
  2. Any steel type timing chain allowed.
  3. Screw in studs and guide plates permitted with any ratio roller rocker arms allowed.
  4. Stud girdles are permitted. Poly lock allowed.
  5. Hydraulic cams will be measured with solid lifter and 0 lash.

INTAKE and SPACER:

  1. Cast Iron two-barrel intake or Edelbrock performer aluminum intakes. Chevrolet #2101 Ford Windsor #2181, Cleveland #2665, #2750 and Chrysler #2176 or P#4532852.
  2. No high-performance intake manifolds permitted. Intakes must be speedway approved.
  3. No porting, polishing, or grinding will be permitted. Do not touch it.
  4. Holley #7448 spacer a maximum ¾” metal spacer with 2 holes (max 1 ½ 1.502) centered in spacer with a straight cut. No Bevels. Spacer Gaskets .065 max thickness.
  5. Holley #4412 spacer a maximum ¾” metal spacer with 2 holes (max 1.690) centered in spacer with a straight cut. No bevels. Spacer gasket .065 max thickness.
  6. All carburetors and spacer plates must meet speedway specifications.
  7. No tapered spacers allowed.

CARBURETOR:

- The Holley 450 carburetor is a 500 top with a 350 bottom. The only 500 tops allowed are 4412 or HP 500 with a 350 bottom part #2300. No modification allowed outside NASCAR rework guidelines.

- The Holley 500 2bbl and Holley 390 4bbl carburetors must conform to the NASCAR rulebook.

See below for rework guidelines:

  1. No polishing, grinding or machine work allowed on any part of the carburetor.
  2. No alterations except choke hardware may be removed and all vacuum ports must be plugged.
  3. Base plate must not be altered in shape or size.
  4. Boosters may not be altered in any manner including size, shape or height of model #.
  5. Any attempt to pull outside air other than through the venturi is not permitted.

AIR CLEANER: 

  1. Round air cleaner element minimum of 12 inches; maximum of 17 inches.
  2. Element must be minimum of 1 ½ “and a maximum of 4 inches in height.
  3. Dry type paper element only. No cold air boxes or cowl induction allowed.
  4. No tubes, funnels or anything which may control the flow of air are permitted.
  5. Air cleaner base must not be above choke horn.

TRANSMISSION and FLYWHEEL ASSEMBLY: 

  1. OEM standard production manual transmissions. Only 3 or 4 speed permitted. All gears must work, no straight cut or machined gears. No top loaders or special production transmissions.
  2. Heavy duty OEM steel clutch permitted. No lightening.
  3. Minimum clutch and flywheel assembly with bolts 33 pounds.
  4. Hydraulic clutch control permitted.
  5. Must have steel bell housing that is speedway approved.
  6. The driveshaft must be of magnetic steel only. The drive-shaft must be painted white with two safety loops attached to the bottom of car.
  7. Tex or Richmond aftermarket transmission with stock type gears permitted.
  8. The 5 ½” clutch package will be allowed with no weight penalty as will the 7 ¼” package and 10 ½”

EXHAUST: 

  1. Headers (4 into 1) will be permitted. No stepped headers. No 180 or crossover allowed. No stainless-steel headers.
  2. Cast iron manifolds permitted.
  3. All LH exhaust must exit behind the driver.
  4. Header wrap permitted.

ENGINE LOCATION: 

  1. Engines may be interchanged from one body manufacturer to another.
  2. Engine location, Ford and GM must follow the current NASCAR rulebook guidelines.
  3. Minimum crankshaft height is 12”, from the center of crank pulley to the ground.

COOLING SYSTEM: 

  1. Aluminum radiators permitted. Any radiator allowed.
  2. Overflow hose recommended.
  3. Antifreeze is not permitted.
  4. Electric fan permitted.

ELECTRICAL SYSTEM: 

  1. Electronic or point type OEM ignition only.
  2. You may run aftermarket distributors.
  3. Only 1 racing coil permitted. (Accell, MSD, etc).
  4. Only one 12-volt battery permitted.
  5. MSD ignition box allowed, analog only. No adjustable timing controls.
  6. MSD claim rule, $300 by speedway or any driver that completed the charger series race.
  7. No open-ended wiring in the driver’s compartment.
  8. Any type of traction devices are not allowed. No computerized systems are allowed.
  9. All ignition systems must be acceptable to speedway officials.
  10. No digital gauges allowed.

FUEL and FUEL SYSTEM: 

  1. Charger cars must purchase five (5) gallons of track fuel from track fuel supply.
  2. All Fuel must pass Speedway Fuel specifications. No oxidizers or additives, fuel must pass track chemical fuel test.
  3. Fuel cells are recommended. Must be securely strapped down with no less than 1/8” steel straps. Fuel cell must be vented high and to the left side.
  4. The maximum capacity allowed is 22 gallons.
  5. Fuel cells must have 8” minimum ground clearance.

WHEELS and TIRES:

  1. Maximum width 10” on all 4. 15” Steel wheels only. All 4 wheels must be same offset.
  2. Air bleeders will not be permitted. No chemical tire treatment allowed.
  3. Tires used for qualifying and race must be approved by the speedway.
  4. Any car tires from any source other than speedway tire building will be disqualified.
  5. Only Florence Motor Speedway purchased track tire required.

WEIGHT w/ ENGINE COMBINATIONS: 

  1. GM 603: 3050 lbs / 1350 lbs / 390 4bbl carb / A one piece open hole solid aluminum carburetor spacer, a maximum 1” in thickness, may be used between the intake manifold and the carburetor. The spacer must be centered on the intake manifold with a single open hole which must be cut perpendicular with the base of the carburetor. Taper, bevels, or any other modifications will not be permitted.
  2. GM 602: 3050 lbs / 1350 lbs / 650 4bbl carb
  3. FORD 347JR: 3050 lbs / 1350 lbs / 390 4 bbl carb/ NO SPACER PLATE
  4. GM 604: 3075 lbs / 1375 lbs / 500 2 bbl carb 4412 / .750” thick two-hole spacer plate /
  5. LMSC Built: 3075 lbs / 1375 lbs / 450 2 bbl carb / .750” thick two-hole spacer plate
  6. DILLON 70cc: 3100 lbs / 1400 lbs / 500 2bbl carb 4412 / .750” thick two-hole spacer plate
  7. ANY STOCK CLIP CAR WITH ANY ENGINE COMBO CAN TAKE 50 LBS OFF FROM LISTED WEIGHT TOTALS ABOVE.
  8. The Holley Ultra XP 500 cfm and tapered spacers will not be allowed.

AMENDMENTS:

  1. These rules are subject to amendments for competition when ample notice has been given by the speedway.
  2. Any car that does not conform to the above rules may be allowed to compete with a weight and/or restrictor plate at the tech committee’s discretion.
  3. Speedway officials may use professional judgment for any infractions for a competitive race program. Rules may be in place for drivers to gain experience.

****ANY RULES YOU DO NOT UNDERSTAND OR YOU NEED CLARIFICATION, PLEASE CONTACT SPEEDWAY OFFICIALS.****

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