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Download 2022 Safety and Technical Regulations

2022 Safety and Technical Regulations


All rights reserved. No part of these Safety and Technical Regulations may be reproduced in any form by any mechanical or electronic means including information storage or retrieval systems without permission in writing from Big Rig Racing, LLC.


Modifications to these Safety and Technical Regulations can happen at any time with the approval and under the authority of Big Rig Racing, LLC.



Basic Minimum Eligibility


Any Class 8 truck which was produced in the North American continent, and had a primary use as a class 8 on highway tractor are eligible for competition in the “racing series" and must adhere to the standards provided below. Alterations to these standards will occur during the competition year only if a safety issue is identified as an emergency.

1. Single axle tractors only.

2. Said tractor will be provided power via a Mass produced engine (10,000 min production run) of at least 11 liters and a maximum of 15 liters.

3. Said tractor will have a fully dressed, race ready GVW of 11,000lb minimum.

4. Said tractor will maintain a Chassis length of 18ft minimum to 22 ft maximum.

5 Said tractor must maintain all stock body panel shape and dimension.

6. Said tractor will be no taller than ten feet six inches. Cab floor will be no lower than the top of the stock unaltered frame rail, no channeling or pocketing of the frame is permitted

7. Commercially available in statements below is defined as, any part which is offered by an OEM or aftermarket supplier to the class 8 tractor market. Specialty suppliers must be approved in advance by the race committee. Said list TBD and distributed to all eligible participants.


Engines -Transmissions


1. Engine will remain "Stock" in regards to all rotating assemblies, including but not limited to crankshaft, camshaft, connecting rods, camshaft and flywheel.

2. Engine must be mounted securely to the frame rail using only factory provided frame connections, location must retain a zero lateral shift.

3. All radiators must be mounted in front of the engine.

4. All engines must be of a modern, stock design.

5. Turbocharger must be of a single stage configuration, no larger than 88mm.

6. Transmissions are required to be a mass produced configuration utilizing a standard "stick type" shift tower with one solid rod extending into the cab for gear selection.

7. All drive power will be transmitted from the engine to the transmission utilizing a standard safety certified clutch and flywheel assembly. No more than two clutch discs are permitted. Centrifugal Clutches are not a legal option.

8. Commercial # 2 diesel, and any series approved additives are the only combustibles which is to be introduced into the combustion chamber. No other accelerants are permitted upstream or downstream of the combustion chamber.

9. Standard turbine wheel explosion protection must be installed in the downstream pipe in a cross pattern, utilizing a pair of 150,000 psi minimum tensile rods no less than .360" diameter.


10. All exhaust must exit a minimum of 12" behind the driver’s compartment in a horizontal manner, or no more than 12" above the cab in a conventional stack configuration.

11. Excessive over fueling will not be permitted due to safety reasons.



Drive Train


1. All driveshafts must be constructed using OEM type joints and tubing.

2. All third member (rear axle) housings are required to have been commercially available in the Class 8, on highway market, with a standard third member installed. (It is permissible to run a limited slip or lock the differential by means of an internal mechanical connection via a std slide lock positioned with the removal bolt only, axle stub connecting the side gears or welded spiders).

3. All third member (rear axle) housings are to retain the original geometry at the axle ends, no geometric alterations for camber or offset are permitted.

4. Driveshaft containment loops must be installed. Said loops will be attached to frame cross members and be of either box or round tube capable of containing the shaft in the event of a joint failure. Any shaft which has the ability to contact the racing surface in the event of said failure will require a second loop to prevent said contact.




1. All tractors are required to be equipped with commercially available Pneumatic "S cam" style drum brakes and linings. Front only commercially available pneumatic disc brakes are legal. All antilock devices (sensors and control units) are to be removed from the tractor.

2. Service brakes are to be actuated thru the OEM floor mounted treadle valve, no hand operated actuation is permissible.

3. All tractors must retain the cab operated parking brakes as provided by the OEM ,mechanically actuated at each rear wheel.

4. Brake cooling ducts may be incorporated, as well as a hydraulic cooling system which can be actuated-deactivated by the driver. Said system may be pressured using air over liquid or an electric pump. Tap water is the only liquid permissible in the cooling system.

5. Brake modulation via an in cab regulator only for rear brakes is legal.





1. Tractor must maintain a minimum of 45 percent of the vehicle’s total weight on the rear axle.

2. Lateral weight distribution must be balanced within six hundred pounds.

3. Front axle construction is limited to an unmodified commercially available part as provided by the OEM. Front axle camber may be made adjustable BUT if axle adjustments are welded to the axle, certified x-ray papers of the welds MUST be presented at safety inspection.

4. Caster wedges are legal up to 20 degrees.

5. Only commercially available, non-adjustable shocks are to be installed. Limit two per axle (one each side).

6. Only Standard OEM airbag or leaf style suspensions are permissible and must maintain OEM attachment bracketry.

7. Permissible alterations include "load assist springs" metal coil, air or pneumatic (combination of two is not permissible), Anti sway bars front and rear, and an anti wrap center link for the third member.

8. No coil over application is permitted in any position on any suspension.





1. Front axle mounting may only be modified using a Pin aligned wedge between the bottom of the Spring or axle support arm and the axle. Wedge angle is limited to 22 degrees

2. Physical alterations to the Front axle geometry are limited to 22 degrees. Modifications must be approved by the committee.

3. Major steering components must remain "unmolested;" these include gearbox, tie rod ends, steering knuckles.





1. Stock OEM class 8 frame rails only. Frame rails may be shortened.

2. All frame rail repairs are to be inspected prior to race eligibility, including straightening, section replacement or shortening/ lengthening.

3. Only OEM frame rail cross member additions in a lateral only configuration are legal.

4. Tow points are to be clearly identified at both ends of the chassis for the safety crew.



Cab Rollover Protection


1. Cab Rollover Protection see drawing for specifications: The internal space of the cab enclosure must contain Rollover protection with 2" DOM. 120" wall as a minimum material. Cage shall be no more than six inches from the structural steel of the four corners of the cab.

2. The Main Corner supports are to be Welded solid 360 degrees to a plate of 64 square inches minimum. Said plates must be 1/4" in thickness minimum.

3. Thru cab connection to the frame supports must be executed via bolts of a tensile strength of 180,000 psi minimum and a diameter of .500" minimum in each corner of the plate.

4. Base mount stanchions are to be bolted and welded to the frame rail when a sub plate is used, or welded directly to frame. Connection plate to the in cab rollover bars will be of the same material and dimensions as prescribed for the in cab.

5. Corners of all bar connections are recommended to have a "pie bracket" welded in for increased integrity.

6. Drawings below should be used as your minimum. All bars are to be contained with the interior part of the cab.

7. All approved Competition Seats will be attached to the rollover protection only. Attachments should be made using via bolts of a tensile strength of 180,000 psi minimum and a diameter of .375" minimum.

8. All safety belt restraints must be an "SFI" approved system with a minimum of 2" width and 5 attachment points, attached to the rollover protection bars using the manufacturers recommendations.

9. A window net is to be installed and attached to the rollover protection bars only. No point of the net is permitted to be attached to the physical exoskeleton of the tractor.

10. Rollover protection bars will be inspected prior to the race for both material and structural integrity. Failure to adhere to the minimum requirements will be cause for the tractor to be "red tagged" until all deficiencies are remedied.




Fore and Aft Crash Bar Assemblies


1. Approved materials, material size and Drawing dimensions listed below.

2. All assemblies must be affixed to the frame rail or in some cases the forward suspension horn of a set forward axle configuration using either or both welding or fasteners with a minimum tensile strength of 180,000 psi and minimum .500" diameter.

3. No Crash Bar Assembly is to extend beyond the highest vertical point of the frame rail by more than one inch.

4. Both Crash Bar Assemblies must be between 85 and 90 degrees to the top frame rail plane.

5. Crash Bar Assemblies must not extend fore or aft more than six inches from termination point of the physical frame rail.

6. Approved crash bar material to be no larger than 3 inch schedule 80.

7. Front and rear bars must be between 10” and 17”above the ground and all bars connected, welded and closed.



Side Crash Intrusion Prevention


1. Side intrusion assembly: must be affixed to frame rails using approved attachment style listed below. For side intrusion assembly design please refer to drawings provided.

2. If Modular assembly style is selected they must be connected to each adjacent assembly. Combined width of the right and left assembly when attached to the frame is not to exceed eight feet four inches.

3. Side intrusion assembly shall be no more than 36” from the axle centerline, both front and rear.

4. Side intrusion assembly ground clearance shall maintain seven inches clearance as a minimum, and sixteen inches maximum.

5. Side intrusion assemblies should be covered in an approved sheeting material

which include steel, aluminum or sheet plastic (sheet metal minimum of .035", plastic to be minimum .0625")

6. Assemblies require two horizontal round or square bars 2.0” OD minimum x .120” wall no greater than a 24" on centerline. Vertical support bars can be no more than 24” apart between each vertical tube.

7. Rear tires are to be "covered" using an approved manufacturers debris deflection device.





1. All safety equipment will be inspected at the beginning of the season and periodically checked for compliance.

2. All Driver and passenger safety equipment including but not limited to seats, seat restraints, helmets, neck restraints, socks, shoes and gloves (all required) must have a current FIA or SFI approval. In addition, the use of SFI 3.2/A1 or 3.2/A3 suit will require the driver also wear SFI- or FIA certified underpants and shirt. SFI 3.2/A5 or higher not required but recommended.

3. OEM safety glass and Lexan of a minimum thickness of .1875" are the only windscreens allowed for the forward and rearward facing openings, and are subject to inspection and mandatory replacement if they become cracked or damaged to the point of vision impairment. In addition, use of Lexan in the forward opening will require a center support of adequate material to prevent an "implosion" of the windscreen into the drivers area.

4. Door windows must be retracted into the door during competition and the opening must be covered by an approved side window net, fully attached to the rollover protection system.

5. A standard 10 lb SFI approved fire suppression system is required with a maximum of 3 nozzles, one over the engine turbocharger, one in the drivers side of the cockpit and one at the rear of the cabin facing the fuel cell, and must be capable of being activated by the driver from the seat when fully belted in, and one mounted to the exterior rear of the cabin.

6. Quick couplings must be used for steering wheel.




1. All batteries are to be located outside the cabin in an enclosure in case of explosion, and are to be a "gel" type or equivalent.

2. Standard 1/4 turn master switches are required in the cabin within drivers reach and externally for safety crews, these must be in series.

3. High pressure common rail equipped engines must have an approved Air knife to shut down the air to the turbo in the event of a runaway, activation must be capable both at the drivers location and rear of cabin externally.

4. Three brake lights are to be incorporated onto the rear of the cab, one each side at a minimum ht of 6 ft from the racing surface, and one at the top center.



Wheels and tires


1. Only hub or stud pilot one piece approved rims are legal.

2. Front wheel studs and nuts are to be covered by approved hub cover or European style lugs.

3. Internal balance bags or Centrifugal balancers only, no external balance attached to the rim is permitted.

4. Minimum pressures will be determined prior to the 1st competition.

5. Rear tires are to be duals for asphalt, discussions of dirt track will be ongoing after testing, tire prep will be limited to tread reduction only, no other modifications allowed which include but not limited to chemical or heat alteration.

6. Tire choices are left to the individual teams, we do recommend the Bandag “slick” cap for recaps as ongoing testing has been showing promising life with up to 600 laps on a right front tire.




1. Certified competition fuel cells mounted inboard of the frame rails are the only legal configuration.

2. No remote oil filtration permitted.

3. Standard # 2 diesel only will be permitted as a fuel, additives such as Lucas are permitted. No other power adder permitted (which includes but not limited to nitrous, propane, water injection or alcohol).

4. Cooling system cannot contain "antifreeze" water and racing type additives only.

5. Fluid leaks are not permitted and must be repaired prior to competition.





1. All firewall openings are to be closed using steel or aluminum sheet only.

2. No backup or side view cameras permitted.

3. Left and right side mirrors and a center rearview are required.

4. Each truck will be required to have 2 way communication between spotter and driver at all times during competition.


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