Nationals Series Adopts Unified Dirt Late Model Council Specs
(November 8, 2016) The Southern Nationals Series
will officially adopt the Unified Dirt Late Model Council's technical
and driver personal protection specifications, adding them to
the rule books for the Schaeffer's Oil Southern Nationals Series,
Spring Nationals, and Southern Nationals Bonus Series.
The Council's sanctioning body committee met in October to develop
unified specifications for all Council members, including the
Southern Nationals Series, World of Outlaws Late Model Series,
Lucas Oil Late Model Dirt Series, Lucas Oil MLRA Series, Ultimate
Super Late Model Series, DIRTcar Racing, and Eldora Speedway.
All dirt late model sanctioning series will be encouraged to adopt
the specifications effective January 1, 2017.
The adopted specifications, detailed in the below bulletin, will
be integrated into the 2017 General Rules and Specifications.
This includes fuel cells, battery and electrical systems, wheels
and wheel discs/covers, and personal safety equipment such as
drivers' gloves, head and neck systems, seats and fire suppression.
In addition to the outlined technical and driver personal protection
specifications, the Council will meet at PRI in December to address
weighted suspension components, rear end construction materials
and axels. Specifications for these components will be released
after the December meeting.
DIRTcar Racing and World of Outlaws continue to work with their
partners to ensure the safety and consistency of its cars and
drivers, and to solidify the sport in all its facets.
THIS DOCUMENT IS INTENDED AS A GUIDE TO THE UNIFIED LATE MODEL
COUNCIL RULES, RULE ADJUSTMENTS, RULE ADDITIONS, REFINEMENTS,
Please note: The bullet points of this bulletin will be applied
to each Series' individual rule book, amending the applicable
rule section or in some cases creating a new section.
LATE MODEL TECHNICAL BULLETIN
Effective January 1, 2017
Fuel, Fuel Cells, Fuel Systems:
*An approved fuel cell must be used at all times.
*The only fuel cells that are approved are those that meet and/or
exceed the FIA / FT3 specifications.
*Fuel cells must be used in accordance with the FT3 specifications.
Alterations of any kind will not be permitted. (Example: alterations
to top plate, alterations or removal of foam, etc.)
*Fuel valve plate, fuel pickup and fuel return fittings must be
on the top of the fuel cell.
*Fuel cells that are not contained within a welded steel tubing
"rack" must have two (2) equally spaced steel straps
that measure two (2) inches wide by 1/8 inch in thickness that
completely surround the fuel cell. The straps must be bolted to
the frame. Longitudinal (front to rear) orientation is recommended
for strap mounting.
*Willy's Carburetor roll over plate part # WCD4000 is approved
Electrical Systems, Batteries, Electrical Accessories:
*The battery must be securely mounted with positive fasteners
*The battery terminals must be insulated or enclosed with a non-conductive
material that will prevent contact with any part of the race car
should the battery become dislodged from the battery mount.
*One (1) mandatory battery disconnect switch must be installed
on the rear deck, behind the driver seat, in a location that is
easily accessible from outside the race car. The switch must be
clearly labeled with off/on direction. The switch must be directly
in-line with the NEGATIVE battery cable and be capable of completely
disconnecting the NEGATIVE terminal of the battery from the race
car. Negative or "ground" wiring connections must not
be made anywhere from the battery negative terminal to the input
side of the disconnect switch. An additional battery disconnect
switch within the drivers reach may also be used.
Wheel, Wheel Discs, Wheel Spacers:
*Only aluminum wheels will be permitted.
*Only approved wheel discs will be permitted. Approved wheel discs
are wheel discs that are fastened to the wheel using a minimum
of three (3), 5/16 inch diameter magnetic steel hex head bolts.
The use of wheel discs with any other type of fastener will not
*Only aluminum wheel spacers will be permitted.
Personal Safety Equipment:
*Drivers must wear gloves at all times they are on track, during
practice and competition.
*Driver's gloves must meet or exceed the SFI 3.3 specification
and have a legible and valid SFI 3.3 label.
*Drivers, at all times they are on the track, must have their
helmets correctly (following manufacturers installation and use
instructions) connected to an approved head and neck restraint.
The head and neck restraint must be SFI 38.1 approved and display
a legible and valid SFI 38.1 label.
Race Car Installed Safety Equipment:
*All racecars must be equipped with a complete driver full containment
type seat with head rest and head surround. All seats must meet
or exceed the SFI 39.2 specification and display a legible and
valid SFI 39.2 label.
*Seats must be used as supplied and instructed by the seat manufacturer
with the exception of trimming the length of the left side head
surround for the purpose of egress only. If the left side head
surround is trimmed to a distance that is less than the most forward
surface of the drivers helmet (usually the area crossing the chin)
then a left side head net meeting the SFI 37.1 must be installed
with a quick release latch.
*Seats must be mounted to a seat frame that is welded to the racecar
frame/roll cage structure. Attaching points, angles, and materials
for the seat frame and mounting of the seat to the seat frame
must be in accordance to the seat manufacturer instructions.
B. Fire Suppression
*All racecars must be equipped with a thermally deployed automatic
fire suppression system. The fire suppression system will consist
of a DOT approved cylinder manufactured from aluminum or steel
with a capacity of ten (10) lbs. of fire extinguishing agent,
steel or steel reinforced lines, and two (2) thermally activated
*All systems must meet or exceed SFI 17.1 specifications.
*Systems must be fully charged with ten (10) lbs. of DuPont FE-36,
3M NOVEC 1230, or Fire Aide and display a legible and valid SFI
and manufacturer label depicting fire extinguishing agent, capacity,
and certification date. Cylinders that or beyond useful certification
date must be inspected, serviced and re-labeled by the manufacturer.
*Cylinders must be mounted forward of the fuel cell. Cylinders
must be securely mounted to the frame/roll cage assembly. The
certification label must be unobstructed and easily accessible
for inspection when the mounting is complete.
*The cylinder must be connected to the nozzles with steel or steel
*Two (2) thermally activated nozzles must be used. One (1) nozzle
must be located directly above the fuel cell in the fuel cell
area and the second nozzle must be located in the driver cockpit
*An optional manual override cable may be added to the system.
As agreed by the Unified Late Model Council - November
5, 2016 rev.3