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Tire Rule:

Tire Rule for 311 (NC) Motor Speedway on October 26, 2019:
Hoosier Racing Tire: 1300, 1350, 1600 RR option
American Racer: 44, 48, 56 RR option

*** Tires will be checked for soaking and by durometer for hardness before each car goes on the track for qualifying or any racing action.

Weight Rules:

2350# - Open Motor
2300# - Steel Block/Aluminum Head - Spec Motor Only (8" spoiler allowed, 12" sides)
2250# - CT525 Motor (8" spoiler allowed)
2250# - All Steel Motor or Crate Motor (8" spoiler allowed, 12" sides)

* 1# per lap burnoff + 5 lbs. in B-Mains and Feature


Body Rules:

1. The rules and/or regulations set forth herein do not express or imply warranty of safety, from publication of, or, compliance with these rules and/or regulations. They are intended as a guide for the conduct of the Southern Nationals Series and are in no way a guarantee against injury to participants.

2. These rules and/or regulations will apply to all Southern Nationals Series sanctioned racing events.

3. Southern Nationals Series officials have full authority over said sanctioned racing events. In the event of any dispute the Race Directors decision will be final.

4. All racecars are subject to be inspected by the Southern Nationals Series Technical Director at any time during the event.

5. The Southern Nationals Series reserves the right to alter or amend these rules and/or regulations in the interest of fair competition.


A. Nosepiece and roof must match body style of car.

B. All cars must have a minimum of one inch (1”) and a maximum of two (2”) inches of roll at top of fenders, doors, and quarter panels. A sharp edge will not be permitted. Body roll must go from sides over interior, not interior over sides.

C. Floorboards and firewall must cover the driver’s area and be constructed to provide maximum safety.

D. Driver’s seat must remain in the same general area as the general design of the car.

E. Windshield screen or bars are mandatory.

F. Legible numbers, at least eighteen inches (18”) high are required on each side of the car and roof.

G. No fins or raised lips of any kind are permitted anywhere along the entire length of the car.

H. Bodyline must be a smooth even line from front to rear.

I. No “slope noses” or “wedge cars” permitted. Noses must be stock appearing, subject to Series template.

J. No “belly pans” or any type of enclosure on bottom of car is permitted. Skid plate to protect oil pan is permitted.

K. No wings or tunnels of any kind are permitted underneath the body or chassis of the car. A maximum of one (1) stone deflector, for rear mounted oil pumps, oil filters, and for the main oil tank will be permitted. The deflector may be made of steel, aluminum, or heavy gauge wire. The cover may only be mounted near the unit it is designed to protect with a maximum size of 18”x 18” and mounted only from the upper right frame rail to the lower right frame rail.

L. All non-approved bodies will be assessed a fifty pound (50#) minimum weight penalty.

M. No panels of any kind under the rear deck running from the front to the rear of the car.

N. Any air cleaner scoops used must be positioned in front of or around the air cleaner and cannot exceed one (1”) inch in height above any part of the air cleaner. The scoop cannot be designed with fins or raised edges to direct airflow. The scoop cannot extend behind the rear of the air cleaner and must have a maximum width of seventeen inches (17”) at the rear, with a maximum of ten inches (10”) width at the front and cannot have more than one inch (1”) opening from the in height at the front.

O. No adjustable shocks, hydraulic or pneumatic weight jacks, trackers, MSD boxes or similar adjustable components of any kind are permitted inside the cockpit of the car. Taping over of any adjuster is not permitted. The offending component must be removed from the cockpit.


A. All stock nosepieces must be approved by a Southern Nationals Series Technical Inspector.

B. Nosepieces must be made of molded type material.

C. Two piece noses must be fastened together in center. No spacers to gain width are permitted.

D. The nosepiece must be mounted so as not to alter its original shape.

E. No material can be removed from the nosepiece. No cutting from bottom, top or sides is permitted.

F. No adding to the bottom of the nosepiece in the front achieve lower ground clearance is permitted.

G. A stock nosepiece can extend a maximum of forty-eight inches (48") from the center of the front hub to the farthest point extending forward.

H. Front fender flairs must be made of plastic and cannot alter the original shape of the nosepiece. The front fender flairs cannot extend beyond the front tire more than one inch (1") in width with wheels pointed straight.

I. Front fender flairs must have collapsible support.

J. The nose piece must have a headlight decal package attached. One warning will be permitted and then the car must run contrasting color tape in the shape of a headlight.


A. The roof length size must be a minimum of forty-four inches (44") to a
maximum of fifty-four inches (54").

B. The roof width size must be a minimum of forty-eight inches (48") to a
maximum of fifty-two inches (52").

C. Roof must be stock appearing and mounted level.

D. Roof height must be between forty-five inches (45”) and forty-eight (48”) from the ground.

E. The roof must be mounted parallel to body and near center of the car.

F. A maximum one and one half inch (1.5”) roll, tuned downward, is permitted along the front edge of the roof. A maximum one-inch (1”) roll turned downward is permitted along the rear edge of the roof. (Roll permitted to help strengthen roof).

G. No flat or odd shaped roofs permitted.

H. All roof side panels must extend to the edge of the body. Maximum Roof side panel window size – seventeen inches (17”) at the top, forty-three inches (43”) maximum at the bottom. The window area may be covered with clear Lexan or transparent material. Both roof support openings must be covered or both must be left open. Decals will be permitted but must meet the dimensions in the drawing and must be approved by the Technical Inspector. Maximum two inch (2”) bow in either direction in rear roof side panels is permitted.

I. Front posts must be flat and if uniform width from top to bottom – four inch (4”) maximum width.

J. Any sun shields, four inch (4”) maximum, must be able to hinge for easy exiting of car.


A. Must be level and flat from left to right side of car.

B. Fenders not permitted to gain height from rear to front of car.

C. No part of fender or hood can be outside of the bodyline.

D. The front fender can be a maximum of thirty six inches in height. Height is measured vertically from the ground to the top of the fender behind the front tires.


A. Door to door cannot exceed seventy-six inches in width at the top of the doors.

B. Door to door cannot exceed eighty two inches in width at the bottom in the center of the car.

C. Doors cannot exceed thirty-six inches in height measured from the ground.

D. At no point can the door sides break in towards the center of the car between the top and bottom measurements.

E. The minimum ground clearance permitted is three inches.


A. No offset quarter panels permitted. Must be equally tapered towards the center of the car.

B. Tire clearance from body must be a minimum of tow inches (2”). No wheel skirts permitted.

C. At no point can quarter panel sides break in towards center of the car.


A. No aluminum frames permitted in construction of car.

B. Minimum 103” wheelbase.

C. Rectangle or Square Tubing:

The frame of all cars must be constructed of two inch (2”) by two-inch (2”) minimum Rectangular or square tubing with a minimum of eight inch (8”) circumference and a minimum of eighty-three thousands inch (.083”) wall thickness.

D. Tube Frame: The frame of all cars must be constructed of a minimum of one and three-quarter (1¾”) round tubing and must have a wall thickness of eighty-three thousands inch (.083”) wall thickness minimum.

E. If rear bumper is stubbed, it may only extend a maximum of eight inches (8”) beyond frame. Any stubbed rear bumpers that extend eight inches (8”) or more beyond frame must be rounded and directed towards the front of the car.

F. It is recommended that all cars be equipped with a tow hook or strap.

G. All battery supports must be braced in two axis - two horizontal and one vertical.


A. Cars must have a suitable steel roll cage in drivers’ compartment including headrest.

B. Side roll bars are mandatory and must extend into the door panels.

C. A minimum of three (3) bars must be used on the left side of the car. Each bar must be a minimum of one and one-half inch (1½’) in diameter with a minimum thickness of ninety-five thousands inch (.065”).

D. Roll cage must be welded to the frame.

E. Roll cage must be above the drivers’ helmet.

F. No “fin-shaped” or “foil-shaped” add-ons permitted on any part of the roll cage. The entire roll cage must be constructed of round tubing only.


A. Interior is permitted to be dropped to the middle of the car a maximum of three inches (3”) below the top of doors and a minimum of twelve inches (12”) below the roll cage.

B. Interior must gradually taper up to the quarter panel height and be level for thirty-two inches (32”) from the rear of the quarter panel.

C. Interior must be fastened flush at the top of the door and quarter panels and may taper gradually towards the center if the car not creating a “lip effect”.

D. Interior must run in a straight line from behind the drivers’ seat to the rear spoiler.

E. If interior is flat through the car, it must maintain a twelve-inch (12”) clearance from roll cage for easy exciting from either side of the car.

F. All cars with interior panels must at NO point in the car be over three inches (3”) in height. The portion of the panel running beside the driver must taper to zero or end in line with the steering wheel.

G. If interior is dropped at firewall, that portion of the firewall must be filled for safety reasons.


A. Rear spoiler must be manufactured of material of adequate strength such as Lexan or Aluminum.

B. Rear spoiler material maximum eight-inch (8”) height measured for deck to tip of material. Maximum seventy-two inch (72”) width.

C. Rear spoiler is not permitted to be suspended above the deck to create a “wing effect.”

D. Rear spoiler must begin where quarter panels end. No extended decks permitted.

E. Maximum of three (3) rear spoiler supports. Option of two (2) additional one inch (1”) aluminum braces.

F. Spoiler supports cannot be mounted wider than the top of the quarter panel.


A. An approved fuel cell (32 gallon maximum) must be securely mounted in the trunk area of the car inside a 20-gauge metal box supported by two 1/8 x 2" steel straps.

B. A firewall must be installed between the fuel tank and drivers’ compartment.

A. Gasoline or Alcohol only. Nitrous gases or other nitrate additives are not permitted.


A. Any transmission with working reverse and working forward gears is permitted.

B. Manual transmission must be equipped with an operational clutch.

C. Automatic transmissions are permitted.

D. The transmission must be mounted to the rear of the engine and lead to one drive shaft.

E. No “live-axle” rear-ends are permitted.

F. No independent rear suspensions are permitted.

G. All rear-ends using a cable to lock-in the rear-end must have the cable mounted outside the cockpit area and not in reach of the driver.


A. All drive shafts must be a minimum of two inches in diameter. All drive shafts must be painted silver or white.

B. Only one drive shaft is permitted.

C. The driveshaft must be protected with a secure driveshaft hoop or sling.


A. Steel, aluminum, carbon-fiber or plastic wheels are allowed.

B. Wheels must be mounted with lug nuts: no knock-off mounting devices are allowed.

C. Maximum wheel width is fourteen inches (14”).

D. Maximum width outside of front tires is ninety inches (90”).

E. Maximum width outside of rear tires is eighty-eight inches (88”).


A. Must be equipped with sufficient braking system.


A) Shocks must be constructed of aluminum or steel. Canister shocks are permitted.
1. The only external connection allowed to the shock is a single hose to a single remote canister with the option of a compression adjuster in the canister.
2. Compression adjuster and/or canister cannot be mounted within the reach of the driver.

B) No cross connected shocks are allowed.
1. The only external connection allowed to the damper is a single hose to a single remote canister with the option of a compression adjuster in the canister.
2. Compression adjuster and/or canister cannot be mounted within the reach of the driver.

C) No 'Rod-Through' designs are allowed.
1. 'Rod-Through' shocks are defined as those shock absorbers in which the piston rod protrudes from both ends of the shock body.

D) No Inerters are allowed.
1. No rotating parts inside the damper.
2. No inerter style dampers, either mechanical or hydraulic, or other type of primarily acceleration sensitive damping devices not permitted.

E) No electrical adjusted or active dampers are allowed. No electrical wires, transmitting or receiving components will be allowed to be attached internally or externally to the dampers or mounted inside of any components or dampers. No portion of the race car including and not limited to - shocks and spring components or chassis components may have the ability to communicate transfer/transmit/receive any type of digital or analog data or any language and or adjust or monitor in any way whatsoever including but not limited to a variation of a wireless remote device/phone/computer/table/iPad or a mechanical remote device.

F) Springs must be made of steel. Torsion bars are not allowed in the rear.

G) Coil springs must be steel. Leaf springs may be composite or steel.

H) Shock Locations:
1. Only one shock per wheel is permitted at the left front, right front right rear corners.
2. Left rear must have one shock behind the axle tube and may have one traction (dummy) shock on the front side or top of axle tube. Must mount vertically to the birdcage or clamp bracket.
3. One 5th Coil Shock permitted.
4. One 90/10 optional shock may be mounted above lift arm on upper lift arm plates.

I) Drop Chain (limiting chain) is permitted. Must mount vertically between frame and a clamp bracket.

J) Bump Stops and/or bump springs are permitted.

K) Suspension covers are not allowed. Rear covers on racecar are not allowed outside of your pit area. Spring and/or shock covers are permitted, but must be fastened directly to the spring or shock.

L) A Swing Arm and/or Z Link suspension is permitted as long as the Top and Bottom solid links are mounted on hiems and run in the opposite directions of the bird cage. The Shock on a Swing Arm or Z Link rear suspension may mount to the bird cage or the bottom radius rod.


A) Suspension and/or rear end parts can be made of steel or aluminum. Aluminum mounting brackets are permitted.

B) Frame and/or suspension mounts must be welded or bolted solid to the frame and not move. ie-Floating, sliding, pivoting and/or rotating mounts and/or brackets of any sort are not allowed.

C) Bolted components must match the correct bolt size with the hole (for instance no 3/8 bolts in a ½ inch hole will be deemed illegal) and be torqued to a min. of 40 foot pounds per inch.

D) Rear Suspension Mounts:
1. Single sheer mounts must be ¼" minimum steel and/or ½" minimum aluminum.
2. Double sheer mounts must be 1/8" minimum steel and/or ¼" minimum aluminum.
3. Sheer mounts must use minimum 5/8" rod ends with minimum ½" grade 8 bolts only.
4. Double sheer mount must be no wider than 4 inches with a minimum ½" inch grade 8 bolt with steel or aluminum spacers only.

E) Only one (1) mechanical traction device is permitted. Only one (1) pull bar or one (1) lift arm is permitted. No other options are allowed. Covers of any sort in any relation to the lift arm or pull bar are not allowed.

F) Lift Arm and Pull Bar:
1. Floating, pivoting and/or rotating mounts and/or brackets of any sort (connected to and/or associated with the pull bar or lift arm) are not allowed.
2. Lift arm is defined as a steel or aluminum triangulated car that is connected at the top and bottom of the rear end housing, extending forward where it is connected to a shock, shock-spring coil-over combination and a limiting chain. One stabilizer bar is permitted to locate the front of the lift arm from left to right in the car.
3. 6th coil or braking spring assemblies are permitted, must be in front of the 5th coil shock.
4. Pull bar is defined as a continuous assembly that is connected to the top of the rear end and extends forward to a solid mounting point located on the chassis. The mounting location at both the front and rear of the pull bar may be adjustable but must remain constant during competition (cannot be adjustable from the cockpit).

G) Radius Rods:
1. All rear suspension radius rods must be of a fixed length. No hydraulic cylinders, torsion bars, bump rods, spring rods, slider rods or shock-type radius rods are permitted.
2. Radius rods must be minimum of 1" diameter OD. Rods can be round, square, or hex shaped. Rods must be minimum of .095 steel or .120 aluminum in tubing thickness.
3. Heim joints must be a minimum 5/8, and a maximum ¾" steel heim. No rubber bushings.
4. ONLY - Two (2) radius rods per slide.
a. Radius rods must be spaced on the frame a minimum of 6".
b. Radius rods must be spaced on the birdcage a minimum of 6" and a maximum of 12".
c. Measurements will be made from center of each radius rod bolt.

H) Birdcages:
1. Birdcages may consist of multiple barrels but must bolt or weld together to work as a single barrel birdcage.
2. Limited one (1) birdcage per side.
3. Shock(s) and radius rods must mount to the birdcage.
4. Floating, pivoting and/or rotating mounts and/or brackets of any sort are not allowed. All brackets or mounts attached to the birdcage must be bolted or welded solid.


A) NO "in-cockpit driver controlled" suspension devices permitted. NO weight jacks of any kind permitted. (This includes fifth [5th] coils etc.) ANY driver using "in-cockpit driver controlled" suspension devices or weight jacks WILL BE DISQUALIFIED FROM COMPETITION.


A. Mufflers are MANDATORY. Only variance of this rule will be where not required by host track.

B. Exhaust is not permitted to be directed towards ground. Exhaust must be parallel to the ground.


A. All Traction Control Devices are strictly prohibited during any form or portion of a Southern Nationals Series sanctioned event, race or practice/test session.

B. All traction control devices whether electronically controlled in the ignition system, wheel sensors or any means of measuring ground speed to control wheel spin are strictly prohibited. All devices not mentioned in the above that are found to control wheel spin, timing or fuel delivery control will be considered strictly prohibited.

C. At NO time during the season and beyond will there be any type of ping control devices, dial a chip controls, timing controls or any modifications to the ignition control boxes, distributors, or any other part of the Ignition System. This includes any add on component or components inside or outside the cockpit of any competitors racecar. There shall be NO driver controlled wheel spin, timing or fuel delivery control devices in the cockpit area of any racecar.

D. A competitor found with any of the above mentioned will lose the complete device permanently and will lose all points earned to that point in the season. NOTE: A competitor may be asked for his electronic ignition at any time by the Tech. Director to be sent for testing and inspection. Failure to hand over the electronic ignition will result in the holding of any purse monies won.


A. Any driver or crew member found altering the racing surface will be disqualified.

B. NO two-way radios.

C. NO "in-cockpit driver controlled" electronic devices of any kind permitted.

D. NO computer controlled devices of any kind permitted.

E. NO rearview mirrors of any kind permitted.


G. Southern Nationals Series officials reserve the right to change and/or alter rules and procedures at any time. ALL OFFICIAL DECISIONS ARE FINAL!



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