R. The roll bars can have two versions, low front tire or high front tire. All enclosed cars and cars that retain the windshield frame must have a high front tire design. Open-top cars can include a high or low front tire design. High front tires are also known as side tires. 2. Convertibles of model year 2006 or later shall be equipped with a roll bar that meets safety level 2 standards for materials and construction, unless one of the following criteria is met. B. The vehicle is equipped with a roll bar or commercially available roll bar, which is described by the manufacturer as rollover protection suitable for the track.
(For example, style bars are not acceptable.) G. Removable spacers are allowed in one of the following configurations. Swing door bars can help a driver and passenger get into a vehicle without having to go to yoga classes, and as long as your car is slower than 8.50 ET, they`re completely NHRA legal. The Chassisworks kit has a fork clutch connector that exceeds the minimum thickness required by the NHRA. The tipping rules are quite broad and are as follows: J. All roll bars shall be tightened to prevent forward and backward movement, with the spacers located in the upper third of the roll bar. At least two (2) spacers must be used parallel to the sides of the vehicle and attached to the outer ends of the roll bar. These efforts should, if possible, be reversed. Diagonal lateral struts shall be fitted to prevent lateral deformation of the tyre. In most cases, lateral bracing from the bottom corner of the tire on the side to the top corner of the tire on the other side is sufficient. Although installing diagonal side bracing in the main tire is the strongest (and therefore most preferred) alternative, there may be cases when such an installation is not practical. In such situations, the installation of the diagonal strut from the bottom of the front/rear beam on one side to the top corner of the tire on the other is acceptable.
In convertibles with a production line from 1990 or later, such as the Mazda Miata, a “V” design, also known as a “double diagonal”, between the rear brackets is acceptable. The upper windshield is another important part of the cage. It serves as a support for the front tire and prevents the roof from collapsing. Again, it must be welded to both front links with the same specifications as the front bars and the main bar at the top of the windshield bracket. The handlebar is slightly curved at both ends, allowing it to adapt to the shape of the windshield and store it away from the rider`s point of view. “The windshield bar is one of the most important handlebars in a rollover cage during a rollover situation,” Wright explained. “This prevents the front of the roof from entering the driver.” Chris Alston`s Chassisworks Complete Bearing Cage, Swivel Door Brackets and Window Net Kit Participants are reminded that there is a significant gap between a minimum standard and the best protection that current technology can offer. It is recommended that seats, restraint systems, roll bars and helmets meet the highest possible safety standards. Note: This means that for 2006+ vehicles, if the engine is not the original equipment model as delivered in that vehicle, if forced induction has been installed, or if the vehicle has more than six (6) cylinders or six (6) cylinders and forced induction of any kind, the vehicle must be equipped with rollover protection on the aftermarket or documented protection in the event of Factory overturn. C. The vehicle is equipped with a roll bar that meets safety level 2 for materials and construction.
1. Convertibles up to and including model year 2005 must be equipped with roll-over protection that meets one of the following criteria: The front tire and windshield rules are vague as written. The front rod should be a continuous piece of pipe of the same diameter and thickness as the main support. It welds to the top corner of the main tire and follows the roof and A-pillar line to another 6-inch x 6-inch plate in the floor. The front tire can pass through or in front of the dashboard. The straight bar from the main tire must be parallel to the roof before making its first turn. There may also be bars connected to the front bars, passing through the firewall and connected to the front frame rails. Wright explained: “When you get into the 8-second zone, the lower rail links on the front chassis really help stiffen the chassis. They are usually more difficult to assemble when standard dashboards, heating and wiring are installed.
“When building a race car, one of the most frustrating and misunderstood parts of construction can be the roll bar. The vehicles have different frame designs, could have made changes to this frame, or it`s a convertible – all require different features for the cage design. There`s more than you think with this jungle tube gym in your car. In general, the main bracket is installed as close as possible to the roof or roof lining without friction. NHRA rules state: “All roll bars must be less than six inches from the driver`s rear or side of the head, extend at least three inches high above the driver`s helmet when the rider is in a normal riding position, or less than one inch from the roof/roof trim in the area above the driver`s helmet and be at least as wide as the driver`s shoulders or within an inch of the driver`s door. You can also lean the main tire backwards or forwards to get the right measurements. In addition, the bottom of the main tire must be welded with a pair of 6-inch x 6-inch plates above. These specifications apply to all vehicles (except those that issued an SCCA logbook before 01.01.19). Vehicles that have created an SCCA logbook before 01.01.19 may continue to compete with their previously approved rollover structure or meet the following specifications. M. For vehicles of uniform construction or frameless, mounting plates may be used to attach the roll bar structure to the vehicle floor. It is important that the burden is distributed as widely as possible.
On the opposite side of the plate, a support plate of the same size and thickness should be used, with the plates screwed. b. Male or female clevis(s) allowed. Male fork couplings must use two brackets (CM or MS) at least 1/8 inch thick welded to each vertical roll bar; The woman must use a support (CM or MS) at least 1/4 inch thick that is welded to each vertical roll bar. The pins must be within 8 inches of the vertical portion of the front and main tires. A half-shell support device must be welded to the vertical part of the main tire (inside) or to the upper end of the swivel rod (outside), wall of at least 0.118 inches (CM or MS) extending at least 1 5/8 inches beyond the center of the pins. A fork assembly with a male component at least 0.350 inches thick and two female components at least 0.175 inches thick may use a Level 5 screw with a diameter of 1/2 inch and does not require a half-shell support device. One. All parts of the roll bar touched by the driver must be padded with at least 1 inch of material. Upholstery that meets or exceeds SFI 45.1 or FIA 8857-2001 (curved upholstery) or SFI 45.2 or FIA specifications for sports car headrests (flat upholstery) is recommended. B.
Vehicles with tubular chassis: The roll bar shall be integrated into the chassis or chassis. E. For vehicles whose rear window/bulkhead prohibits the installation of rear struts (e.g. Honda del Sol), the main bar shall be attached to the body using plates welded to the cage and bolted to the attachment points of the standard shoulder harness. This installation design shall include a diagonal bar connecting the top of the main bar to the lower mounting point on the passenger side (small bar). Alternatively, the rear window can be removed and a clear LEXAN replacement™ installed. The rear beam struts can pass through this replacement window and through the engine hood or body to allow connection to the frame or monocoque. A roll bar is defined as the main and diagonal tire that are placed behind the driver and complemented by two struts. The roll bar shall be designed to withstand the compressive forces resulting from the fall of the weight of the vehicle on the roll structure and to absorb forward and rearward loads resulting from skidding the vehicle on the ground on the rolling structure.
The main purpose of the roll bar is to protect the driver in the event of a rollover of the vehicle. C-arms must meet the following criteria: A.
