2023 Charger Rules

(Subject To Change)

COMPETING MODELS: 

  1. 1970-2020 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 height's and frame heights must be a minimum 4 inches and will be checked on 4' blocks.
  9. Rear spoiler 5” high with 54” width. Max spoiler height from ground – 39 inches.
  10. Wrecker hookup required front and rear of car.
  11. 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.

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. Adjustable cups allowed on front and rear.
  2. Spring spacers or screw jacks may be used on front and rear.
  3. OEM type steering box. Aftermarket tie rods, center-link, idler, pitman arm, allowed. No rack and pinion.
  4. No one piece billet spindles allowed.
  5. Lower A-frames must be OEM Design. Lower A-Frames must be same length. Aftermarket lowers can be used.
  6. Upper A-frames may be fabricated.
  7. Front sway bar may be OEM or aftermarket. Mounting points may be aftermarket.
  8. Leaf spring and/or coil spring suspension allowed.
  9. Steel rear lower trailing arms required.
  10. A fabricated metal top link and track bar allowed.
  11. Damper shocks may be used.
  12. Rubber bushing, metal bushing, Teflon bushings or heim joints allowed.
  13. Lowering blocks and trailing arms may be adjustable.
  14. Aftermarket, OEM 5×5 design, or Wide 5 hubs allowed.

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

SPRINGS and SHOCKS:

  1. Tie rod or spherical end shocks allowed. OEM aftermarket Struts allowed.
  2. Aftermarket metal body shocks allowed. No canister shocks allowed. Coil springs minimum diameter 5”. 
  3. No composite leaf springs. Coil over eliminator allowed. All cars must compete with type of springs from OEM. 
  4. NO coil binding, bump stops, or travel limiting devices.
  5. NO spring rubbers allowed.
  6. Shocks may be claimed by any Charger driver finishing in race for $175.00 cash each. Shocks to be claimed must be in writing to officials with cash within 10 minutes after race. Driver must finish on leap lap and can only protest within 5 positions of finishing order.
  7. For specifics on spring rules, refer to the current NASCAR rulebook.

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, ford#347sr

  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 / Ford 347SR Crate engine rules will 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 carburetor.
  2. No alterations except choke hardware may be removed and all vacuum ports must be plugged.
    C. Base plate must not be altered in shape or size.
  3. Boosters may not be altered in any manner including size, shape or height of model #.
  4. 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. Driveshaft must be of magnetic steel only. 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. REMOVED: 20 lb weight penalty.
  6. MSD claim rule, $300 by speedway or any driver that completed the charger series race.
  7. No open ended wiring in driver’s compartment.
  8. Any type 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 Myrtle Beach 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.
    GM 602: 3050 lbs / 1350 lbs / 650 4bbl carb
  2. FORD 347JR: 3050 lbs / 1350 lbs / 390 4 bbl carb/ NO SPACER PLATE
  3. GM 604: 3075 lbs / 1375 lbs / 500 2 bbl carb 4412 / .750” thick two-hole spacer plate /
  4. FORD 347SR / 347SR7: 3100 lbs / 1400 lbs / 450 2 bbl carb / .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. HMS ENFORCER: 3100 lbs / 1400 lbs / 450 2 bbl carb / .750” thick two-hole spacer plate
  8. LMSC UPGRADE: 3100 lbs / 1400 lbs / 450 2 bbl carb 2300 / .750” thick two-hole spacer plate
  9. ANY STOCK CLIP CAR WITH ANY ENGINE COMBO CAN TAKE 50 LBS OFF FROM LISTED WEIGHT TOTALS ABOVE.
  10. 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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EMAIL

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