2021 Thunder & Lightning Rules

1. Any type passenger car two or four door with a minimum of 101” wheelbase is permitted. No station wagons, no after market or home made bodies. All body parts must be stock. No plastic or fiberglass body cars. No independent rear suspension.

2. Wheelbase must b within 1” of factory listing for the year model.

3. All interiors must be removed. Doors must be welded or bolted shut. Hood and cowl must meet.

4. Stock bodies only, stock type bumpers. No bars above bumpers. You may weld flat bar from one end bumper to frame, may cut fenders for tire clearance. You may run bar in front of radiator and brace back to frame. This bar must be inside of grill area. No boxing interior in any configuration. Headlights must be covered with solid metal.
Floor pan and front/rear firewall must remain stock in there stock locations. (No excessive gutting)

5. There will be no screw jacks of any type allowed on front or year. Spring spacers are allowed. Lowering blocks will be allowed. Stock type springs in stock location on rear. Heavy coil springs will be allowed on front, stock suspension and steering is required. Minimum 5” ground clearance for frame and body. All suspension and steering mounting points front an rear must be in factory locations.

6. Shocks: No adjustable or coil over type shocks, stock only and must remain in factory position. Shocks can be claimed for$50 per shock.
Cars with strut suspension may run adjustable caster/camber plate. No adjustable spring spacers.

7. Stock spoilers: no homemade or wings.

8. Hood pins must be used to keep hood and trunk closed.

9. May use battery box and fabricated battery frame to secure battery. No battery in drivers compartment, unless completely boxed in.

10. Cars must have approved seat belt and double strap shoulder harness. Belts must be bolted to roll bar.

11. Full windshield is required. Lexan may be substituted and must fit as close as possible. Back glass is optional.

12. Roll bars are mandatory. No galvanized pipe. No exhaust tubing. No threaded joints. Bars must be fully welded. Gusses are required at all joints and welded on both sides. Pipe must be a minimum of 1 1/2 inches in diameter with a minimum of .095 thickness. May use racing type drivers seat. Seat must be securely fastened to roll cage. A full 6 point roll cage is highly recommended.

13. Weight: 3350 lbs maximum left side 54%. No more than 50% rear weight at any time. No fuel or fluids will be added after race.

14. Rear end for make an model only. must run a mini spool or open rear ends only. Stock disc brakes are legal. May weld axle gears. Seperate protest will be $100.

15. Fuel cell is mandatory, fuel cell must be a minimum of ten inches from the bottom of the fuel cell container to level ground. Must have a roll bar behind fuel cell. Must be securely strapped down with no less than four 1 1/2 inch x 1/8 inch steel straps. Steel firewall must be located between driver and trunk area. With no less than 20 gauge steel. No aluminum! Must have fire extinguisher with gauge.

16. Mechanical fuel pump only! No high performance. No electric fuel pump. No flex fan

17. Stock V8 engines only, no exceptions! No high performance. The only intake you can run is Chevrolet number 2101, Chrysler number 2176,Ford Cleveland number 2665 with 4 barrel heads number 2750 with two barrel heads, Windsor number 2181, these manifolds must remain as manufactured, no aluminum pulleys, stock type balancer. You can modify stock oil pan for capacity. Stock valves only. Chevrolet valve size 1.94 intake/1.50 exhaust. Ford valve size for Cleveland is 2.05 intake/ 1.65 exhaust for Windsor 1.883 intake/1.546 exhaust, may be bored .060 over and ,015 for wear. Flat top or dish pistons only. No pop-ups. Pistons cannot extend out of block,Single valve springs with damper only. Can pin rocker arm studs, can use poly locks, stock rocker arms only, stock hydraulic lifters only no rollers, no screw in studs or guide plates, maximum cam lift is .425 lift intake and .450 lift exhaust. stock valve jobs only. Minimum head volume in cc,s, all General Motors 72cc,s, Ford Cleveland 72cc,sFord Windsor 56cc,s, Dodge 360, 68cc,s. Engine must be in stock location. Must run stock motor mounts. You may weld a plate on the side of the motor mount to make it solid.

18. Stock factory non welded electronic ignition distributor only, no aftermarket ignition.

19. Carburetor: Holly 2300, two barrel carburetor, model #7448 (350) with a Venturi size of 13/16 inches and maintaining a throttle bore maximum size of 1 1/2 inches. Ford and Chrysler engines may compete with a Holley 2300 carburetor, model 4412 (500) main body mounted on a model 7448 throttle plate. An aluminum ring 3/8” in height may be installed to match Venturi diameter to throttle plate diameter. The rework guidelines for the Holley 2300 series carburetor are as follows: A. Body of carbs. 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: Booster: Boosters may not be changed. Size and shape must not be altered.E: Venturi: Venturi area must not be altered in any manner. Casting ring must not be removed. F. Base plate: Base plate must not be altered in shape or size. G: Butterflies: Butterflies must not be thinned or tapered. Idle holes may be drilled in butterflies. Screw ends may be cut even with shafts, but screw heads must remain standard. H. Throttle Shafts: shafts must remain standard and must not be thinned or cut in any manner. I. Any attempt to pull outside air other than down through the Venturi is not permitted. J: Only paper air filter elements!

20. Carburetor spacers and gaskets: A. Carburetor spacer must be NASCAR approved. B. Only a one piece aluminum carburetor spacer 3/4 inches in thickness may be installed between intake manifold and carburetor. C: The spacer must have two holes with 1 1/2 inch openings located in the center that match the base of the carburetor Holes must be cut perpendicular with base of carburetor. No taper or bevels. D: A one piece gasket maximum .065 inch thickness may be installed between the carburetor and spacer. A one piece gasket maximum 1/4 thick may be installed between the spacer and intake manifold.

21. Exhaust Systems: Headers with 1 5/8 diameter with 3 inch collector will be legal, must exit to the side, minimum 3 foot exhaust, may run one exhaust out each side or both out one side. No H pipe or two in one allowed. Four Tubes must go into one collector only.

22. Drive train: 3 speed, 4 speed, or automatic with or without floor shift. All gears must work. Clutch pressure plate and flywheel must weigh 45 pounds minimum Chevy, 45 pounds minimum Ford must have steel bell housing or scatter shield. Separate Protest $100.

23. Drive Shaft: Stock steel- must have drive shaft loop 2 inches wide and 1/4 inch thick. Must be painted white. No aluminum driveshafts.

24. No aftermarket brake pedal or brake system. All brake parts must remain stock.

25. Tires: 15” Hoosier Comanche tires of 15” with 8” width rims, rims must be same offset. This is the only tires you can purchase and must purchase tires from Florence Motor Speedway.

26. No reading between the lines: If not in the rules, must remain stock!

27. Any driver that wins two consecutive races must start tenth in the next race.

28. Claiming Rule: The engine may be claimed by another competitor for $2,000.00 less carburetor, headers, and distributor and pulleys.

29. Must run fully charged fire extinguisher.

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Glenski, Linker Split Late Model Twins At Florence 


  • For Immediate Release  


TIMMONSVILLE, SC (September 11) – Ryan Glenski and Matt Linker split Twin 40-lappers for the NASCAR Advance Auto Parts Weekly Series Late Model Stock cars Saturday night at Florence Motor Speedway. 

After starting from the pole in race one, Linker jumped out to the lead but was overtaken by Glenski on lap three.  The two went back-and-forth with Linker going back out front on lap 21, before Glenski fought back to take the lead for the final time one lap later.  Glenski led the rest of the way for his third win of the season over Linker, 2021 track champion Matt Cox, Casey Kelley, and RA Brown. 

For race two, the top seven finishers were inverted putting Kade Brown and Justin Milliken on the front row.  Milliken stumbled on the start, allowing Kelley to make it three-wide for the lead entering turn one.  Kelley would lead until lap 10 when RA Brown moved to the front.  RA Brown continued to lead until lap 31 when he and Linker slammed doors on the frontstretch.  Linker went on to lead the rest of the way for his first win of the season over RA Brown, Glenski, Cox, and K. Brown. 

Talon Gallimore survived a wild race to win his second Charger division race of 2021.  It all started when front row starters Ricky Locklair, Jr. and Averitt Lucas spun in turn one and collected Archie Adams, Sr.  Gallimore assumed the lead from there and would continue to pace the field when the caution waved on lap 13 when Brian Owens spun off turn three.  Gallimore led the rest of the way for his second win of the season over Michael Grooms, track champion Archie Adams, Jr., Averitt Lucas, and Brendan Lee. 

SuperTruck champion Strom Altman led flag-to-flag for his sixth win of the season.  Rounding out the top five were Cody Kelley, Neal Grant, Clay Thomas, and Adam Fulford.    

AJ Sanders and Kevin Jackson traded the lead back-and-forth before Sanders took control with 11 laps to go and led the rest of the way for his eighth Mini Stock race of 2021.  Sanders also captured the track championship with the win followed by Jeffrey Kummer, Kevin Jackson, Truett Miranda, and Corey Singleton. 

The Street Stocks returned and Ricky Locklair, Jr. brought home the win after a great battle with second place finisher Gary Ledbetter.  Following Locklair and Ledbetter at the finish were Wayne Locklair, JR Moore, and Robert Filipiak. 

After points leader Drake Williamson was eliminated in a first lap crash, Jacob O’Neal fought his way through the field to fight from behind for the Allison Legacy Series win and track championship.  Following O’Neal at the finish were David Smith, Richard Parker, Parker Davis, and Easton Brewer. 

Josh Speas passed Mitchell Thompson on lap 12 to win the Legends feature over Jaiden Bowling, Damon Burdette, and Sean McElearney.  Greg Tumbleston held off Howard Leonard, Jr. for the Thunder & Lightening win, and Riley Music was the Bandolero winner. 

             The next race at Florence Motor Speedway will be on Saturday night, October 2nd when the touring stars of the CARS Tour return.  Be sure to “Like” Florence Motor Speedway on Facebook, follow @FlorenceMSpdwy on Twitter to keep up on all that’s going on in 2021, visit fmspeedway.com. or watch all the action live each week on fmspeedway.tv. 


Contact FMS


836 E Smith St, Timmonsville, SC 29161



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