2024 rules

Please note these are Xtreme Late Model Series rules

Download Rules

ELECTRONICS

Scoring transponder must be mounted on bottom right rear of motor plate

CHASSIS

Any car not less than 103” wheelbase
Late model chassis only
No uni-body cars
NO MIRRORS PERMITTED

BODY

Aluminum or composite (MD3 or Stakt) bodies only “Late Model Style”. Steel bodies are not allowed
Body must be mounted securely on the chassis from the rear of the driver's seat forward
Nose to be late model plastic
Standard Dirt type bodies only.No wedge bodies
No wings or roof mounted spoilers. No Gurney lips, foils, or rudder of any kind
Floor pan / firewall must be steel or aluminum from the rear of the driver's seat (left to right) forward
No outside iron rails (Nerf bars)
Front fenders and hood must be at least as far back as the engine plate. No protruding sharp edges will be allowed
Hood must be secured on all four corners
Car will NOT be allowed to run without a hood in place. NO HOOD, NO RACE
Body width to be 71’’ minimum and 76’’ inches maximum rear width measured at spoiler. 82’’ max at bottom of door
Ground to top of deck maximum 39” (within a 1” tolerance)
Quarter panels may not be higher than the rear deck
Flat aftermarket aluminum or fiberglass roofs
Driver's compartment must be enclosed
No devices allowing adjustment from driver’s compartment, other than brake bias
All windows must have a minimum 12” (twelve inches) vertical opening. The entire interior must have 12” (twelve inches) of clearance from interior deck to roof and all sections of roll cage
All cars MUST have 3 posts or straps located in front of the driver. Post will be built and attached securely. They must be built with ½” tubing or 1/8” x 1” straps
Must have at least one number on both doors and on the roof. Minimum size of number 18” tall 2” wide and contrasting color of car
No mirrors or electronic communication devices of any kind, No sign boards. U. Spoiler specs Maximum height 8” tall by 76” wide

ROLL CAGE

All roll bars to be built using round tube
Roll bars shall be of the full cage type, mild seamed steel 1 ½” or 1 3/4” X .095 wall minimum. 4130 Chromoly 1 ½” or 1 3/4” X .095 wall minimum, with full loop from frame over the driver. These bars are to be connected on the top of both sides with another bar. Cage shall be within 3” to the top of the car and 6” to the sides of the top. In the back loop, running from the right top to the bottom bar at about 45 degrees, there shall be a bar. These bars must be properly welded together and attached to the frame. Roll bars to be welded to the frame/chassis
All “T” intersections must be gusseted and welded on both sides
Cage to be above the driver's helmet by 2”. E. Must have one bar front to rear approximately center of the cage
Roll cage must include three door bars on the driver's side within 3”of the door. Welded to both the front and back uprights, evenly spaced to protect the driver’s hips and legs. Minimum of one brace running vertically. 1/8” steel or ¼” aluminum door bar plate on driver’s side is REQUIRED
Front loops are allowed inside the body in front or behind the radiator
There will be two bars angled from top of cage towards rear end, which can extend past rear axle to frame rail
You may be asked to drill 1/4” hole in a roll cage for inspection purposes
All cars must be equipped with a tow hook or similar device both front and rear
Radiators may be mounted to a front bar with stock mounts removed. Bar may extend to fenders but must remain behind the bumper. Bar must be independent of the cage and NO larger than roll bar material
The technical official or race committee must approve all roll cages

SUSPENSION AND STEERING COMPONENTS

Steering box or Rack & Pinion steering is allowed
Quick release steering wheel required
Cockpit operated suspension devices are NOT allowed.

ENGINE SETBACK

The engine set back will be no more than 6” from the center or top of the ball joint to the forward most spark plug or 25 ½’’ inches measured from the center of the ball joint to the front of the engine plate for those cars that have engine plates
Centerline of crankshaft may not vary more than 1” from center-line of front stub

ENGINE

Cast Iron block and heads (Except 604 crate motor)
No Titanium rotating parts. Crank and rods.
No Dry Sump oiling systems ● See class rules for specific regulations

RODS

Any steel rod only

PISTONS

CAMS

Roller cams are allowed
No roller cam bearings

GEAR DRIVES

Allowed

CYLINDER HEADS

Must be OEM or aftermarket cast iron heads only. (Except 604 crate motors)
All heads must be stock valve angle for make: (Chevy = 23-degree, Ford = 20-degree, Dodge = 18-degree)
No angle milling of heads

ROCKER ARMS

INTAKE MANIFOLD

Any production intake manifold
No fabricated intakes.

CARBURETOR

Must have TWO return springs
Must have a toe strap on the throttle pedal
Maximum 1 ½” spacer plate is allowed. ● See Class Rules for specific regulations
EVACUATION SYSTEMS ARE NOT ALLOWED OF ANY TYPE! Note: This means any type of vacuum system

IGNITION

ALL CARS TO HAVE MSD BOX INACCESSIBLE TO DRIVER DURING COMPETITION, BUT ACCESSIBLE TO TRACK OFFICIALS. SINGLE BOX per car ONLY. Boxes allowed are 6A #6200, 6AL #6420, 6ALN #6430, Digital 6AL #6425, Digital 6CT #6427
Track tech officials are allowed to test boxes at any time.
A kill switch is required within easy reach of the SAFETY CREWS. It must be clearly labeled “ON” and “OFF”.See class rules for RMP restrictions

FUEL PUMP

No electric pumps

FUEL

Crate motors: Pump, race gas, racing alcohol or E85 from a service station. 2 Barrel cars: Pump, race gas or racing alcohol or E85 from a service station only. No Nitro or Nitrous Oxide
NO ADDITIVES. Including oxygenated additives of any kind. Subject to inspection at any time
Specific gravity on alcohol is not to exceed .795 or within (plus or minus) .10 of standard track fuel sample

FUEL SHUTOFF

All cars to have a 1/4 turn off valve in the fuel line in the driver's compartment, to be accessible to the driver and painted RED. It must be 1/4 turn off type. Must be clearly marked ON - OFF

FUEL CELL

Approved fuel cell (Maximum capacity 32 gallons) in approved fuel cell can be required, must be fastened securely
A fire shield of no less than 18-gauge metal to be placed between tank and driver. Must have an L shaped shield in front and bottom of the fuel cell
Fuel cell is to have a full sealing cap and a roll over vent
Tanks must be protected with one tubular bar in front of the tank and behind the tank not to exceed 2” in outside diameter
All fuel cell mounts subject to safety inspector’s or race committee approval
Any car leaking or spilling fuel will be black flagged

RADIATOR

Must be in front of the engine
ANTI-FREEZE IS NOT ALLOWED. Water Wetter is suggested

TRANSMISSION

Must have two forward and reverse gear
Bert, Brinn, Falcon, etc. or OEM manual transmissions are allowed
Starter may mount on the reverse side of the motor for Bert, Brinn, and etc. transmission
Must run approved scatter shield for manual transmission
All cars must be able to move smoothly and slowly through pits
If a trans cooler is used and located inside the car it must be shielded from the driver

DRIVE-LINE

Steel, aluminum, or carbon fiber drive-lines may be used, but must be painted white
Drive shaft loop (360 degrees) are mandatory. Must be placed 6” minimum to 16” maximum from the transmission tail shaft

REAR-END

Full Floater rear end is allowed
Quick change rear ends are allowed. No live axles (sprint car)
Maximum track width 88”

REAR SPRINGS/REAR SUSPENSION

Any type of rear suspension (except independent) is allowed

SHOCKS

Approved conventional closed in shock absorbers only.Must be constructed of aluminum or steel
Coil over covers allowed, must be removed for inspection
Remote reservoir shocks allowed
No air, air dumps, inverter, crossover, cross connected, electronic, or three or four-way adjustable shocks
One shock per wheel, plus may have one traction shock on left rear and one shock on lift bar

SPRINGS

All coil springs must be maximum 20” (or less) free height with 0.5-inch tolerance
Progressive springs are allowed

No torsion bars, air bags, air sprints, or inner liners
Stacked springs and spring rubbers are allowed

BATTERY

All batteries must be mounted in an approved manner
‘Maintenance Free’, no vent caps and sealed battery highly suggested
Batteries that are not sealed must be sealed in a marine type box
Batteries are not allowed in the driver’s compartment

BUMPERS

Front bumpers will be of aftermarket tubular design, and must be behind the nosepiece
Rear bumpers may be made from .095 round 1 ½ inch and/or square stock 2x2 inches or less
Rear bumper may extend no more than 4” past the main frame rails
Rear body panels to be held with flexible strapping OR a maximum .095, 3/4” tube may be used past frame rails to stiffen rear quarter panels
A lower hoop and upper hoop off the main bar is required to protect the fuel cell

TIRES

Hoosier 88.0/11-15/D55,90.0/11-15/D55, 92.0/11-15/D55,M40/D55, WRS2/D55

Size Pattern T.W. Dia. Circ. Wheel Compound

90.0/11.0-15 Large Cross Block 11.0” 28.5” 89.0” 12”-14” NLMT3

92.0/11.0-15 Large Cross Block 11.0” 29.0” 92.0” 12”-14” NLMT3, NLMT4

No Grinding!! Buffing only with sander to remove feathering (glaze). Grooving and sipping is allowed.
Tires can be inspected at any time

WHEELS

Steel or Aluminum wheels only. Carbon fiber and titanium wheels will not be allowed
12’’ or 14” wheel for 11’’ tire.
Wheel studs minimum 5/8” and 5/8” lug nuts are required
Bead locks are allowed, mud plugs are allowed
Bleeder valves are allowed

BRAKES

Must have at least three-wheel brakes operational. L/F and both rear
Rotors must be all steel. Carbon Fiber brakes are not allowed
No copper or plastic brake lines
Aftermarket brake pedals with bias controller allowed

EXHAUST / MUFFLERS

Stock exhaust manifolds or headers bottom dump or over the engine are allowed
Mufflers and headers must remain attached. All muffler and header components must remain intact and operating. Failure to comply with this provision will result in automatic disqualification
Track DBA requirements must be met 95 dba @ 100’. ABSOLUTELY NO EXCEPTIONS AS THIS NOISE REQUIREMENT WILL BE STRICTLY ENFORCED.

SEATS

Car must have approved racing type bucket seat
Seat must be mounted securely to ROLL CAGE
Headrest is mandatory or a high back seat is required. Containment seat recommended
Upholstered and padded highly suggested
Positively No Homemade Aluminum, Plastic or Fiberglass seats allowed

SAFETY BELT REQUIREMENTS

General - Each Competitor is solely responsible for the effectiveness of personal safety equipment used during an event. Each competitor is expected to investigate and educate themselves with the effectiveness and availability of personal safety equipment
Seat Belts - Each car should be equipped with an SFI 16.5 or SFI 16.1 approved seat belt restraint system until the date of the belt expiration (usually two years). Seat belts restraint systems shall be installed in accordance with the directions and application of the system supplier or manufacturer. (A quick release seat belt and shoulder harness no less than 3” wide and submarine belt (crouch) are mandatory. 2” wide shoulder harness for Hans device ok)
Seat belt webbing that comes into contact with any sharp or non-radiused metal edge should be protected from that edge by means of push on grip vinyl trim. Seat manufacturers supply the seat with trim protecting the webbing from abrasion or cutting under impact conditions and should be used to their specifications
It is the responsibility of the driver, not the Track, Officials or Promoter to ensure that his/her seat belt restraint system and all components are SFI approved, correctly installed, maintained and properly used
All belts must be mounted to the roll cage separately from the seat with 7/16” grade five bolts minimum
A steel plate may be welded to the roll cage at the driver's right side for belt attachment to prevent drivers from sliding side to side under the belt
Belts must come from behind the driver. The mounting position is important! Shoulder belt should be mounted approximately 4” below the shoulders. The lap belts mounting should be the same width of the driver
Harness/belts must be worn at all times when the car is on the track
2yrs old on belts maximum. The date stamp must be readable and belts must not be worn (frayed) or they will have to be replaced for your safety

SAFETY

Drivers should wear a full-face helmet, with at least a valid SA 2005 or better Standard Snell label at all times on the track or when the car is fired
The driver should wear the helmet in accordance with the directions provided by the helmet manufacturer and/or supplier
Head and Neck restraints are required. If a head and neck restraint system is connected it should conform to the manufacturer's mounting instructions
Helmet and face shield must be worn at all times while operating A car on the race track. No goggles permitted
Each driver should wear a fire-resistant uniform meeting the SFI 3.2A/5 specification and display a valid SFI 3.2A/5 label
Each driver should also wear fire resistant accessories that effectively cover the remaining parts of the body. Shoes and gloves should meet the SFI 3.3 specification and display a valid SFI.3label. Nomex-type or equivalent fire-resistant uniforms (suit), gloves, neck brace, are mandatory
Nomex-type or equivalent hood, socks, underwear and shoes are highly suggested
Driver’s side window net are required or arm restraints must be worn. Window nets must be equipped with quick release mechanisms. An all-steel release system is highly recommended
Other Safety Items:
- No sharp or protruding edges in or around the cockpit, which would impede the driver’s rapid exit from the car
- A marked electrical kill switch in reach of the driver
- A marked fuel shut off valve in reach of the driver
- Flame retardant seat, roll bar, knee and steering pads or padding are suggested
- Driveline u-joint scatter shields are suggested

FIRE CONTROL

A fully charged fire extinguisher meeting SFI 167.1 with activation push or pull knob within the reach of the driver to protect the driver by flooding the driver’s compartment is suggested
Valve plunger (actuator) must be mounted at the right of the driver and in plain view
On-board system will be inspected and must be passed by Tech inspector or race committee
It is recommended that teams have in the rear of their transporter an easily accessible fire extinguisher of at least 2.5 gal FFF or equivalent, in addition to the in-car system
If no on-board system, suggested minimum 2.5-pound FFF or equivalent (dry powder) fire extinguisher must be mounted within driver’s reach in an approved bracket, for the driver’s safety

WEIGHT

Any car weighing light after the heat race or feature event will be scored and paid for last place.This includes not stopping at the scales after an event when required (See classes below)

SPECIFIC CLASS (ENGINE / CAR) RULES:

CLASS A - LATE MODEL CHASSIS ONLY

ENGINE GM Crate #602 or #604

CARBURETOR One four barrel

WEIGHT 2300 lbs. (All weights enforced with the driver at any time)

IGNITION 6800 RPM ignition chip

Tech on crate motors consists of, but not limited to; Valve Spring Check, Bubble Test, Cam Doctor, Whistler Gauge Test, and a Rocker Arm Go-No-Go Gauge

CLASS B – LATE MODEL CHASSIS ONLY

ENGINE All cast Iron Motor, wet sump only 410 cid max

CARBURETOR One 4412 must pass Go-No-Go Gauges. Air horn may be removed. 4412 XP ok

WEIGHT 2400 lbs. (All weights enforced with the driver at any time)

IGNITION 7200 RPM ignition chip

If running alcohol, the letter “A” behind the car number, must be displayed for safety personnel and tech purposes

ADDITIONAL WEIGHT

All added weight must be in block form, painted white, with the car number on it. Weight must be securely fastened, with minimum ½ inch bolts, inside the body panels and not on rear or front bumper. 25 lbs. per bolt mount. One bolt 25 pounds, two bolts 50 pounds. No one piece over 50 lbs.

PROTEST ENGINE/TRANSMISSIONS/CHASSIS

Participating car owners and drivers ONLY may protest another car’s compliance with the engine rules. Car must be still running competitively at the end of the feature. The protest must be filed with the track referee or the Technical Inspector with a $1000 deposit (parts & labor) for a top end inspection which includes all top end items plus the piston rod assembly, timing chain, camshaft, or converter/clutch. Factory Sealed Crate motors will not be torn down unless factory seals have been tampered with and protester deposits cost of a new crate motor. Deposit must be within 10 minutes after the main event and protested CAR OWNER may counter protest within 10 minutes after being notified. Once the Technical Inspector receives protest money, protest has begun. Money will not be dispersed until protest inspection of the engine rules and the office notified of results. If anything, else regarding the engine is being questioned it must be written down on the original protest, it must state what is to be inspected. MUST BE REGISTERED PARTICIPANT OF TRACK
Tear down location shall be agreed upon before leaving speedway. Both parties must agree and sign a protest agreement. Driver/Owner being protested may have first choice of where tear down will take place, must be in Local area and shop properly equipped. Officials will make the final decision. The protest car must leave for tear down area within 30 minutes or be declared illegal
Teardowns will be made by the driver, one pitman or mechanic, the Technical Inspector or person chosen by him to be an observer and two alternates. The committee will also safely check cars and assist in rules interpretations
If declared legal the deposit goes to the protest owner. If declared illegal the deposit is returned to the protester, the car and owner/drivers will be penalized a two weeks suspension, car and drivers money and points for the night and lose all accumulated points in this division, additional fines may be imposed
No alcohol before or during the protest inspection

*All rules are subject to promoter’s discretion