2024
Tire Rule:
Our tire rule for all Schaeffer's Oil Spring Nationals Series
shows in 2024 is as follows:
Hoosier Racing Tire: NLMT 2, 3, 4
American Racer Tire: 44, 48, Pro3/56, Pro4
If you have any questions concerning the 2024 tire rule, please
contact Ray Cook at 828-360-5353.
Weight Rules:
2350# - Open Motor
2300# - Steel Block/Aluminum Head - Spec Motor Only (8" spoiler
allowed, 12" sides)
2250# - CT525 Motor (8" spoiler allowed)
2250# - All Steel Motor or Crate Motor (8" spoiler allowed,
12" sides)
* 1# per lap burnoff + 5 lbs. in B-Mains and Feature
Body Rules:
In 2024, the Schaeffer's Oil Spring Nationals Series
will follow the rulebook and droop rule adopted by both the Lucas
Oil Late Model Dirt Series and the World of Outlaws Case Construction
Late Model Series. Spring Nationals Series officials reserve the
right to change and/or alter rules and procedures at any time.
ALL OFFICIAL DECISIONS ARE FINAL!
* Full
2024 Lucas Oil Late Model Dirt Series / World of Outlaws Late
Model Series / Schaeffer's Oil Spring Nationals Series Rulebook
Rear Travel Limiter (Droop Rule) -
As taken from the Rulebook linked above.
a. A vertical travel limiting chain must be installed on the left
rear of the car from the left rear axle housing to the frame.
The travel limiting chain must attach to a bearing type mount
or a clamp mounted bracket with the chain mounted to the top (12
o’clock) of the left rear axle tube, between the birdcage
and the edge of the left rear bell of the axle housing, and to
the left rear frame directly above the chain mount on the rear
axle. Travel limiting chains must be installed so that when taunt
they are as close to vertical as possible. One (1) compliance
device may be used. The compliance device must not be more than
one inch (1") thick (without a load applied) and remain completely
open and visible. Compliance devices can be rubber or any like
material but must not be installed in any type of canister. Springs,
spring loaded, and/or pneumatic devices will not be permitted.
No tapered, beveled, or roller skate type of compliance rubber
will be permitted. Compliance devices must be solid material,
same diameter top to bottom, not hollowed or drilled to soften
the material.
b. The travel limiting chain including the compliance
rubber must be installed so that when the car is jacked up from
the rear the chain assembly is tight (no slack).The travel limiting
chain is subject to inspection at any time during the event at
the discretion of the officials. Cars will be jacked up on the
under-slung frame rail between the center of the rear axle and
the panhard bar mount. The left rear under-slung rail must be
located between the left rear birdcage and the edge of the left
rear axle housing bell. Cars will be jacked up until a forty-thousandths
of an inch (.040”) shim will slide between the left rear
tire and the ground. Once the car is jacked up as described a
vertical measurement will be taken from the ground to the top
trailing edge of the rear deck bar, six inches (6”) inboard
of the left rear quarter panel outer edge. The measurement must
not exceed fifty-one inches (51”).
c. All droop limiter assemblies must support the
unsprung mass of the rear-end. The stretched value of the droop
limiter assembly may be no more than three-quarters of an inch
(3/4”) at 1,200 lbs. The procedure: preload 100 lbs. zero
(0) distance, pull to a value of 1,200 lbs.
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