LATE MODEL RULES 2/25/2015
***CRATE ENGINE CARS WILL FOLLOW NESMITH LATE MODEL SERIES RULES***
1. Nosepiece and roof must match body style of car.
2. 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 or angle will not be permitted. Body roll must go from sides over interior, not interior over sides.
3. Floorboards and firewall must cover the driver’s area and be constructed to provide
4. Driver’s seat must remain on the left side of the drive line.
5. Front window bars are mandatory.
6. Legible numbers, at least eighteen inches (18”) high are required on each side of the car and roof.
7. No fins or raised lips of any kind are permitted anywhere along the entire length of the car.
8. Bodyline must be a smooth even line from front to rear.
9. No “slope noses” or “wedge cars” permitted. Noses must be stock appearing, subject to Series template.
10. No “belly pans” or any type of enclosure on bottom of cars will be permitted. Skid plate to protect oil pan is permitted.
11. 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.
12. All body panels must be solid. No holes, slots, or air gaps are permitted.
13. All non-approved bodies or any section/s of the body can or will be assessed a fifty pound (50#) minimum weight penalty at the discretion of the Technical Director.
14. No panels of any kind under the rear deck running from the front to the rear of the car. Bracing from fuel cell top from front to rear is legal.
15. 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 in height at the front.
16. No cockpit or driver 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.
1. Technical Inspector must approve all stock nosepieces.
2. Nosepieces must be made of molded type material.
3. Two (2) piece noses must be fastened together in the center. No spacers to gain width are permitted.
4. The nosepiece must be mounted so as not to alter its original shape.
5. Adding to the bottom of the nosepiece in the front achieving lower ground clearance is permitted.
6. A stock nosepiece can extend a maximum of fifty-two inches from the center of
the front hub to the farthest point extending forward.
7. Front fender flares 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 in width with wheels pointed straight.
8. Front fender flares must have collapsible support.
9. Front fender flares can extend a maximum of three inches (3”) above the fender tops and hood.
10. Front fender flares can extend a maximum of four inches (4”) above where the filler panel meets the hood.
11. The nosepiece 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.
Roof and Roof Supports
1. The roof length size must be a minimum of forty-four inches to a maximum of
2. The roof width size must be a minimum of forty-eight inches to a maximum of
3. Roof must be stock appearing and mounted level.
4. Roof height must be between forty-five inches (45”) and forty-eight inches (48”) from the ground.
5. The roof must be mounted parallel to body and near center of the car.
6. A maximum one and one half inch (1.5”) roll, turned 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).
7. No flat or odd shaped roofs permitted.
8. All roof side (sail) panels must extend to the edge of the body. Maximum (no tolerance) right side sail panel size – seventeen inches (17”) at the top, forty- three inches (43”) at the bottom. Maximum (no tolerance) left side sail panel size – seventeen inches (17”) at the top, forty-three inches (43”) at the bottom and minimum fifteen inches (15”) at the top, forty inches (40”) 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, if left open the openings must remain the same size. 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.
9. All cars must have a minimum of three inches (3”) and a maximum of four inches (4”)
between sail panel and spoiler side where they meet the deck.
10. Front posts must be flat and in uniform width from top to bottom – four inch (4”) maximum width.
11. Any sun shields, four inch (4”) maximum, must be able to hinge for easy exiting of car.
Front Fenders and Hood
1. Must be level and flat from left to right side of car.
2. Fenders are not permitted to gain height from rear to front of car.
3. No part of fender or hood can be outside of the bodyline.
4. The front fender can be a maximum of thirty-six inches (36”) in height. Height is measured vertically from the ground to the top of the fender behind the front tires.
1. Door to door cannot exceed seventy-six inches (76”) in width at the top of the doors.
2. Door to door cannot exceed eighty- two inches (82”) in width at the bottom in the center of the car.
3. Doors cannot exceed thirty-six inches (36”) in height measured from the ground.
4. At no point can the door sides break in towards the center of the car between the top and bottom measurements.
5. The minimum ground clearance permitted is three inches (3”).
1. No offset quarter panels permitted. Must be equally tapered towards the center of the car.
2. Tire clearance from body must be a minimum of two inches (2”). No wheel skirts permitted.
3. At no point can quarter panel sides break in towards center of the car.
4. Right side quarter panel must be straight in line with the door or taper in a maximum of one inch (1’).
5. Left rear quarter panels must extend downward from the deck a minimum of thirty-three inches (33”) and a maximum of thirty-six inches (36”) including the plastic. Measured at the front and rear of the quarter panel. Right rear quarter panels must extend downward from the deck a minimum of twenty- seven inches (27”) without the plastic and thirty-one inches (31”) with plastic. Measured at the front and rear of the quarter panel. One inch (1”) tolerance.
1. No aluminum frames permitted in construction of car.
2. Minimum 103” wheelbase.
3. 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.
4. Round Tube Frame: The frame of all cars must be constructed of a minimum of one and three- quarter inch (1¾”) round tubing and must have a wall thickness of eighty- three thousands inch (.083”) wall thickness minimum.
5. 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.
6. It is recommended that all cars be equipped with a tow hook or strap.
7. All battery supports must be braced in two axis - two horizontal and one vertical.
1. Cars must have a suitable steel roll cage in drivers’ compartment including headrest.
2. Side roll bars are mandatory and must extend into the door panels.
3. 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 (.095”).
4. Roll cage must be welded to the frame.
5. Roll cage must be above the drivers’ helmet.
6. 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.
7. Roll cage padding certified to SFI Spec 45.1 is required anywhere the driver’s helmet may contact the roll cage while in the driving position.
1. 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.
2. 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.
3. Interior must be fastened flush at the top of the door and quarter panels and must taper gradually towards the center of the car not creating a “lip effect”.
4. Interior must run in a straight line from behind the drivers’ seat to the rear spoiler.
5. If interior is flat through the car, it must maintain a twelve-inch (12”) clearance from roll cage for easy exiting from either side of the car.
6. 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.
7. If interior is dropped at firewall, that portion of the firewall must be filled for safety reasons. Dropped Interiors will be monitored by the Technical Director and his calls on dropped interiors are final.
1. Rear spoiler must be manufactured of material of adequate strength such as Lexan or Aluminum.
2. Rear spoiler material maximum eight-inch (8”) height measured from deck to tip of material. Maximum seventy-two inch (72”) width.
3. Rear spoiler is not permitted to be suspended above the deck to create a “wing effect.”
4. Rear spoiler must begin where quarter panels end. No extended decks permitted.
5. Maximum of three (3) rear spoiler supports. Option of two (2) additional one- inch (1”)
6. Spoiler supports cannot be mounted wider than the top of the quarter panel.
OPEN MOTOR MUST RUN MSD #8728 OR #8738 REV CONTROL AND 8,000 CHIP
1. Engines must be based on a factory design and must be naturally aspirated. Aluminum or steel blocks permitted.
2. No fuel injection devices, electric fuel pumps, turbo chargers, or blowers permitted.
3. Magnetos are permitted. However, the engine must have an operating self-starter.
4. The engine may be set back a maximum of twenty five & half inches (25 1/2”) from the center of ball joint to front of motor plate/ engine bell housing flange.
5. Carburetor is limited to one four barrel.
6. All engines are limited to one spark plug and two valves per cylinder.
7. No engines using coil packs are allowed. Engine must operate using a single distributor. No distributor-less engines allowed.
8. A harmonic balancer certified to SFI Spec 18.1 is required.
9. No overhead cam engines.
1. 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 (2) 1/8 x 2"
2. A firewall must be installed between the fuel tank and drivers’ compartment.
3. Gasoline or Alcohol only. Nitrous gases or other nitrate additives are not permitted.
1. No titanium chassis or suspension components
2. No titanium fasteners
Transmission, Clutch, Rearend
1. Any transmission with working reverse and working forward gears is permitted.
2. Manual transmission must be equipped with an operational clutch.
3. Automatic transmissions are permitted.
4. The transmission must be mounted to the rear of the engine and lead to one drive shaft.
5. No “live-axle” rear-ends are permitted.
6. No independent rear suspensions are permitted.
7. 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.
1. All drive shafts must be a minimum of two inches (2”) in diameter. All drive shafts must be painted silver or white.
2. Only one drive shaft is permitted.
3. The drive shaft must be protected with a secure drive shaft hoop or sling.
1. WRS D-55's on all four corners, unless otherwise announced for a particular event
1. Steel, aluminum, carbon fiber or plastic wheels are allowed.
2. Wheels must be mounted with lug nuts: no knock-off mounting devices are allowed.
3. Maximum wheel width is fourteen inches (14”).
4. Maximum width outside of front tires is ninety inches (90”).
5. Maximum width outside of rear tires is eighty-eight inches (88”).
1. Must be equipped with sufficient four (4) wheel braking system.
2. On track three wheel braking is allowed.
3. No titanium or carbon fiber brake rotors are permitted.
Shocks & Springs
1. Shocks must be constructed of aluminum or steel. Remote reservoirs are permitted.
2. Coil springs must be steel. Leaf springs may be composite or steel.
Remote Control Suspension Devices
1. 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!
Traction Control Devices
1. All Traction Control Devices are strictly prohibited
2. 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.
3. At NO time during the 2015 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.
4. 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 Technical 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.
1. 2,350 lbs after the race for open motor
2. 50 lbs in front of the motor plate
1. NO batteries to be located in the drivers’ compartment/cockpit.
2. Full containment racing seats are Strongly Recommended. All seats must be mounted properly & securely per the Technical Directors recommendations. The use of Grade 5 or better hardware is also required to attach the seat to the chassis.
3. The use of a 5, 6 or 7 point driver restraint system certified to SFI Spec 16.1 or 16.5 is REQUIRED no exceptions. All driver restraint systems shall not be in excess of 2 years of age past the date of manufacture. The use of a 7 point driver restraint system is strongly recommended. All mounting points of the racing harness MUST be mounted properly in accordance with the manufacturer’s instructions, and securely mounted to the chassis with the use of grade 5 or better hardware.
4. Window Nets certified to SFI Spec 27.1 are required and must be mounted in accordance with the manufacture’s instructions and technical director’s satisfaction.
5. A driveline is REQUIRED.
6. A helmet certified to SnellSA2005 or SA2010 Standard or SFI Spec 31.1A,
31.1/2005 or 31.1/2010 is REQUIRED. Starting 2016 must be SA2010 or newer
7. A driver suit certified to SFI Spec 3.2A/5 is REQUIRED.
8. Gloves certified to SFI Spec 3.3/5 are REQUIRED.
9.. Fire resistant socks are Required.
10. Eighteen (18)-gauge steel or one and one-eighth inch aluminum to protect front, sides and rear of driver is HIGHLY RECOMMENDED.
1. NO two-way radios. No crew to driver radio or transmitted communications of any kind.
2. NO in-cockpit driver controlled electronic devices of any kind permitted.
3. NO computer controlled devices of any kind permitted.
4. NO rearview mirrors of any kind permitted.
5. NCRA officials reserve the right to change and/or alter rules and procedures at
any time. ALL OFFICIAL DECISIONS ARE FINAL!