We
all want to have fun – and the best way to do that is
follow the rules!
All
Drivers must first sign up before you are allowed to be on
the track.
All
Drivers must drive from the drivers stand
General Rules - Offroad is 5-minute
qualifiers, and 5-minute mains. Gas A mains are 15 minutes
if there are more than 15 vehicles. If not 15 the A main
will be 7 minutes.
Oval Races are all 4 minutes
Penalties will be issued for not
being on the track to Marshall. Any car not on the tech
table after there respective heat will be disqualified.
Offroad Gas cars will be started with the starting gate
that will drop and allow all vehicles to go at the same
time. All cars must be on the ground prior to the race. The
only person allowed to be in front of the drivers stand is
the person designated to drop the gate, you are not allowed
to have someone hold your car up in the rear. The starting
gate eliminates the need for this. Any car refueled on the
racetrack will be disqualified.
All oval Cars are rolling starts. Electric Mains are also
rolling starts.
No car will be driven at any time in reverse of the track
traffic. If this occurs, a one-lap penalty will be deducted
off the driver’s best time. The use of reverse is legal in
the Traxxas slash class only.
Turn
marshals may not work on or repair cars.
Unsportsmanlike driving (i.e. intentional hitting
other cars, short coursing, and corner cutting) is not
allowed. Any driver who deliberately takes out another
driver and/or threatens to take out another driver will be
disqualified.
It is the Drivers responsibility to bring the vehicle to
the Tech table immediately following each race. Failure to
do so will result disqualification.
Any violation must be corrected BEFORE the car is raced. If
a car passes through "Tech Inspection" and a
technical illegality is over-looked, the vehicle is still
illegal.
Any
racer may front $50 for tech inspection for any car on the
track - if the car is found to be legal the $50 will be forfeited
and given to the legal racer.
Vehicle Rules
- Batteries: Only sub-C size Nimh or lipo's. A maximum of 6 cells.
Stock Motors: Stock motors must be labeled
13.5
Mod Motors: This class is modified and
therefore any 540 size can be run.
Tires: All tires must be factory available. All offroad
cars are required to run a factory available tire that is
specific to that scale car. i.e. No truck tires mounted on
1/8 scale rims.
Nitro Motors: All 1/10 scale vehicles are
required to run a .15 or smaller unless that motor came with
the kit. If your duratrax came with a .18 you can run it but
you must run it in that kit. Monster trucks are limited to a
.60 or smaller. 1/8 scales must also use a .32 or smaller.
Exhausts: Exhausts may not exceed 85 Dba.
We have a sound meter available. All vehicles found to be in
excess of 85 Db will not be allowed to compete. Stock
systems are usually below this level. This means altered or
homemade systems are usually to loud, and are not allowed.
Chassis: The underside of the vehicle may not have any
sharp edges exposed; all screws not already recessed must be
of button type. Cars
must have a front bumper that is made of a shock absorbing
material e.g. nylon, delrin, plastic, kydex etc. Front
bumpers must be mounted in such a way that they will contact
an object prior to any other portion of the car in a front
impact. Brakes:
All cars must have a braking system capable of slowing the
vehicle to a complete stop
Clutches: All vehicles must have a clutch
between the engine flywheel and vehicle drive gear
Throttle Return: In case of failure, vehicles
must incorporate a return spring attached to the throttle
arm.
Transmission: A minimum of three internal gears and one spur gear in all
offroad vehicles. The transmission must be enclosed on all
sides by a factory-molded case. All oval vehicles must run
at least one working differential.
Oval
Vehicle Rules
We Use the DODC
rules package which can be found here http://www.dirtoval.com/rules/index.html
General Rules
All races will be 4
minutes in length, qualifiers will use Ifmar starts. Turn
marshals may not work on or repair cars. Any cars damaged
and placed in the infield will remain there until that race
is over. All drivers must turn marshal the race immediately
following their race. All cars will be made available for
tech inspection before and after race. Once a car has gone
through tech before the race it must go directly to the
track and not to pit area.
Limited
Sprint and Limited Latemodel: By
entering and racing in this class you agree to the
following. The engine in the car is the responsibility of
the person driving the car. If you buy your motor from
someone or borrow a car or motor from someone and it
is illegal you will be disqualified and subject to the items
listed below. You agree to allow tech personnel to remove
and disassemble your motor at any time and agree that bumps
and jumps is not responsible for any damage that occurs even
if caused carelessness. You agree that upon request you will
immediately take the motor out of the car and completely
tear it down to the bare block with bearings. You will do
this directly in the presence of tech supervision. You also
agree that if you refuse you will be assumed to be cheating
and subject to the below consequence. You further agree that
ANY motor modification will be considered deliberate
and you will suffer a lifetime ban of running any limited
class in the future, in other words you would have to go run
the open class, where you are allowed to grind a crank or
rod.
If
an item is not addressed in the rules listed here than you
should assume it is not legal.
1/10th Scale
2wd Classes

All 2WD Classes: All
entries must be 2wd and rear wheel drive only. For turn
marshal safety all cars must have a front bumper that is
made of a shock absorbing material e.g. nylon, delrin,
plastic, kydex etc. Front bumpers must be mounted in such a
way that they will contact an object prior to any other
portion of the car in a front impact. All cars must have
4-wheel independent suspension. No straight axle cars
allowed, single speed transmissions only. All EDM bodies,
sprint car bodies and cages must resemble contemporary full
scale cars racing in “World of Outlaws” and “DIRT”
sanctioned events. All corners of bodies and wings must be
rounded for safety. Race organizers will choose either foam
or buggy tires at their discretion based on track surface.
No silicone or rubber capped tires allowed.
- Wheelbase:
9.500” min, 11.500" max
- Maximum width:
10.000” (foam tires), 10.250" (rubber tires)
Stock and Limited Nitro
Classes
Radio use is limited
to 2 channels only i.e., no wings adjustable from radio, no
front brakes allowed.
Tires
Foam tires or rubber tires may
be used but must be readily available for purchase (no
prototype tires) Tire additives that are used must be wiped
clean from the tires before any races or practice sessions.
No Grease, No Silicone or Silicone impregnated tires.
- Foam Tires:
Max wheel diameter: 2.0”
Max wheel width: 1.385” rear, 1.000” front
Max tire width: 1.435” rear, 1.050” front
Chassis
Specifications:
All height
measurements are from bottom of chassis unless otherwise
noted.
Late
Models
Molded portion of
body can be no longer than 22”. Late Model bodies may have
openings for cylinder head, fuel tank access, glow plug,
engine tuning, and exhaust outlets only. An under body
support may be added to brace each rear quarter panel, but
must hold it in stock position, can not be flared out. No
additional wings, flaps, spoilers, wickers, vents or
doohickeys will be allowed. Body may not be altered in any
way from it’s stock configuration ie: shortened,
lengthened, narrowed, flared fenders etc. Front and rear
windows may be removed at trim lines but a flat lexan or
similar material deck must be added in cockpit area. Bodies
with add on roofs may leave front and rear windows in or out
but roofs must be mounted in stock position.
- Rear Spoiler:
maximum chord is 2.750" from body deck including
any wickerbills.
- Rear Spoiler Cap:
See
Drawing
- No Side Dams
Sprint
Cars
Must have scale appearing cage, hood, side
panels, nerf bars and bumpers. Minimum of a 4 post cage
required that resembles a drivers cockpit. A driver arm
guard area is permitted on right side panel bust must be of
reasonable size. All electronics, radio gear, fuel tanks
must be positioned inside the cage side frames. Three
dimensional scale appearing exhaust headers must appear on
both sides of car in “engine area” and be made of round
stock or molded polycarbonate (left side of nitro sprint is
optional). Rear cage side panels may be used but may not
extend beyond rear cage frame. No lexan or any other
material may be mounted to nerf bars, bumpers, cage, wing or
any other part of the car that will trap, alter, or direct
air flow for the purpose of gaining an aerodynamic
advantage. Must have appropriate openings on both sides of
cage in driver compartment, forward portion of side panels
can be no taller than highest point of hood, no solid side
panels.
- Maximum Length:
18.000"
- Maximum width of
hood: (3.600")
- Maximum cage
width at driver halo, down tubes, and top frame rail:
3.600"
- Minimum vertical
gap from top of hood to front cage crossbar: .750"
- Wing minimum
height at leading edge: 5.000" from bottom of
chassis
Wings: must be
made from at least 3 separate pieces of polycarbonate or
lexan material, no one piece wings. (for the freeze only Main and Front wings
must be mounted so that they are centered on cage, no offset
wings.) Wing center sections must have all 4 corners set at
90 degree angles, no canted or angled panels. Wings must
also be mounted level from side to side. Center section of
wing may not extend beyond leading or trailing edge of side
panels. Side panels must have braces that hold side panel
rigid at 90deg. to center section during race conditions.
Two braces are required from top of the center foil to the
left sideboard and one brace is permitted below the center
foil to the right side board. Braces can be a maximum of
.750" wide and front edge of front brace must be no
more than 1.5” back from side panel leading edge. Side
Panels may have front, back, top and bottom turnouts of no
more than .375" and are included in max dimension. Flat
foil center sections will be allowed a .250” turndown at
the leading edge.
The 6x6" wing will be the
standard Sprint Car wing size.
6x6" Foam Tire Wing: See
Drawing
- Wing center
section: 6x6” (see drawing TBA)
- Front wing center
section: 8 sq. in. max (see drawing TBA)
Limited and Stock sprint:
No front wings allowed.
Wingless Sprints - no wings
front or rear.
Eastern Dirt
Modified (EDM)
Inner panel must have hood that extends from
front of inner panel to at least the leading edge of the
roof. Front bumper must be mounted flat and can not be
angled up to act as a wing. An additional front body panel
is allowed on the front of the car but may not extend
forward of the front bumper. Front and rear windows must be
removed and any clear portion is included in max roof length
dimension. Side windows and A pillars must attach to side
panels at top edge of door and must also contact entire
length of roof (i.e. no large gaps between roof and top of
windows, no T-tops). Roof width must be at least .500"
narrower than inner panel max width dimension. Side windows
must remain clear and no portions of side window may be
removed or overlap side or sail panel. Roof, windows, side
and sail panels must be symmetrical. Front edge of Door/side
panel may not extend past the centerline of the front axle
with wheels straight. Front of sail panel may be no more
than 1” forward of rear tire leading edge and can not
overlap side windows. No additional lips or flaps are
allowed with the exception of a .250" bend at top and
bottom of side and sail panel. Reasonable size and
quantities of braces are allowed if desired. Bodies must
have at least 1/3 of right rear tire exposed when viewed
from front, top and rear of car. No rear wheel cutouts are
allowed on the horizontal plane of the inner panel.
- Maximum length:
22.000"
- Maximum width of
inner panel: 8.000"
- Minimum hood
width: 2.000"
- Minimum hood
height: .750"
- Maximum front
bumper width: 5.000"
- Front body panel
max width: 4.500"
- Front body panel
max chord length: 3.500"
- Max roof width:
7.000"
- Minimum roof
height: 5.000" from bottom of chassis
- Maximum height of
body at highest point: 7.000" from bottom of
chassis
- Maximum roof
length: 6.500" plus additional .500” rear spoiler
allowed on roof
- Maximum side
panel length: 17.000"
- Rear spoiler: max
chord is 3.125" from body deck including any
wickerbills
Electric Class
Rules
All
cars must run 2-cell lipo pack. 13.5 motor may be used along with any 2-cell lipo.
13.5 motors may not measure lower than 19.2 micro henrys.
Racer is responsible for removal of motor and disassembly of
can for measurements. Mod is any 2 cell lipo and any
motor brushless or brushed.
- Modified:
All motor systems must meet ROAR Brushless
specification with the exception of the MAMBA MAX system
from Caslte Creations which will also be legal for
modified. Sensored or sensorless speed controls are
allowed. Batteries must use a
quick release hobby grade connector for connection to
the ESC ie:sermos, deans, traxxas.
13.5
Spec: DirtOval.com SPEC 13.5
MOTORS or any 13.5 novak can and DirtOval.com SPEC Li-Po 3200mah
batteries are the only motors and batteries legal for this
class. Sensored speed controls only.
All racers shall take every
precaution to insure safe charging and discharging
techniques with their batteries. This shall include but is
not limited to, attentive monitoring of battery during
charging and use of a proper charging container i.e., LiPo
sack. To insure safe charging methods are followed by all
competitors, all batteries will be checked prior to each
race to ensure battery voltage is a maximum of 8.44 volts or
less. If the battery reads 8.45 or more you do not race.
Battery and motor temperature will also be checked with the following
pre-race procedure. A control pack and motor will be placed in the
tech area for the purpose of monitoring the pack
temperature. Checked batteries and motors shall be no more than 10° F above
or below the temp of the control pack or motor. No Freezing
Cans.
Weights (including
transponder)
Sprint Car: minimum weight is 52oz.
EDM and Late Model: minimum weight is 50 oz.
Nitro Class Rules

All classes: Maximum
fuel tank size is 75cc. No stinger modifications and no
pipes with adjustable stingers allowed. Effective
immediately all vehicles will use a stock flywheel made by a
major manufacturer, no modifications are allowed, no
homemade or carbon flywheels. This is for the safety of all
racers and turnmarshals.
- Limited:
O.S. Max 12TG Production motors only. Must be out of the
box STOCK. No modifications allowed. Rotary or Slide
carb version ok. Production headers and pipes only with
max 6mm stinger opening.
- Open:
Any .12 cubic inch engine. Un-modified .15 Rtr engines
may be used.
Weights (including
transponder and fuel)
Minimum weight is 56 oz.
GAS TRUCK
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Body
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Truck
Style w/ fenders. No homemade bodies or chopped roofs.
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Weight
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64 oz minimum for gas (with fuel)
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Rear Spoiler
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Maximum
of 2" rear spoiler allowed including molded in
portions must be mounted to rear of deck lid only.
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Tires
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Tire must be rubber or foam and readily available
Minimum tire width is 2".
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Motor
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Any .15 sized motor or smaller
(any motor that comes in a RTR kit may be used as long
as it is in the original vehicle)
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Side Are Dam
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Side air dam can be from the rear of the cab to
the rear wing and may not be higher than 1" above the
roof line
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A-arms
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Long truck arms only
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Transmission
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Transmission must be a production one, aftermarket
cases are allowed but must retain same basic design
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Traxxas Slash Rules
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Body
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All
trucks must use the Traxxas Slash body
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Chassis
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No
modifications may be made to the chassis system.
Vehicle must be raced in its stock form. Original
Traxxas Replacement parts only, as supplied on
original truck, for damaged/worn parts. Any
manufacturer Bearing may be used. Original Traxxas
Slash wheels and tires only. Only the original Traxxas
Drive Train may be used. No aftermarket or Hop up
replacement drive components may be installed. Traxxas
Steel Planetary Gear Differential Only. Any of the 3
Traxxas spur gears (4683, 4686, or 8690) are
permitted. Any pinion gear that mounts without
modifications needed may be used
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Suspension
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Both
the front & the rear suspension systems must
remain in stock form. Original Traxxas parts only. No
aftermarket/Hop up replacement components may be
installed.
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Legal
Tuning Parts
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–
Original Traxxas Shock Springs may be used
Shock Cap may be replaced with Alum Shock Cap #2667
Original Traxxas Turnbuckles must be used. Ball Differentials are NOT permitted in
the Spec Class
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Steering
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No
modifications may be made to the steering system.
Original Kit parts only. You may install any servo
saver or servo drive-horn that you so choose.
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Electronics
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Original
RTR Kit electronics Speed Control (XL-5) & Servo
(2075) only. You may install any Receiver you so
choose. On board traction/drift device or Gyro’s NOT
permitted
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Motor
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This
class is restricted to a stock Traxxas Titan 12T R/C
motor.
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Battery
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This
class is limited to any 6 cell sub c Nimh or 1 - 2S
7.4 Volt Lipo battery pack – Nimh can not exceed
4200 mah
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Wheels
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Truck
must weight no less then 4.75 pounds ready to Race
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Offroad
Vehicle Rules
Elimination
of the Slick
All 1/10 scale vehicles will run
a minimum tire height of the back side of a #11 blade
All 1/8 scale vehicles will run a
minimum tire height of tip of a 3/32" driver
Monster Truck Scale - 1/10-1/8
RC Pro Series Rules
Truggy Class Scale - 1/10-1/8
RC Pro Series Rules
1/8 FUEL OFF-ROAD SPECS
RC Pro Series Rules
1/10 FUEL 2WD OFF-ROAD TRUCK SPECS
Roar rules apply
1/10 Electric Buggy
Roar rules apply
Traxxas Slash Spec and Pro Spec Rules
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Body
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Must be a Short Course Truck body.
No Beetles.
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Chassis
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Traxxas Slash, Associated SC10,
Losi Strike and HPI Blitz. No
modifications may be made to the chassis system.
Vehicle must be raced in its stock form. No aftermarket or Hop up
replacement drive components may be installed. The
chassis must be stock, no aftermarket. All kits must
use their supplied components - no mixing brands. You
may use anything that came in the OEM box.
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Suspension
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Both
the front & the rear suspension systems must
remain in stock form. Original parts only. No
aftermarket/Hop up replacement components may be
installed.
Box Stock Shocks, NO Big Bore. Aluminum Shock
caps are legal.
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Legal
Tuning Parts
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Direct replacement parts are
allowed. For instance if RPM makes it for the
Slash it is allowed.
Ball Differentials are NOT permitted in
the Spec Class. No performance upgrade
parts. Lets be honest adding aluminum parts to
your vehicle isn't going to do anything to enhance
overall performance. If you feel you need it then by
all means add it, its your money. The part must
be a direct replacement part for that vehicle.
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Steering
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No
modifications may be made to the steering system.
Original Kit parts only. You may install any servo
saver or servo drive-horn that you so choose.
Associated – #SHV1504MG, Traxxas – 2075,
LOSI – TBD and HPI – TBD Servos Only. All kits
must use their supplied components - no mixing brands.
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Electronics
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Original Kit electronics Speed Control & Servo
only. Associated – #SHV1504MG, Traxxas –
2075, LOSI – TBD and HPI – TBD.
You may install any Receiver you so
choose. On board traction/drift device or Gyro’s NOT
permitted.
HPI SC-15, LOSI RTR Speedo, Associated XP SC200
and Traxxas XL-5. All kits must use their supplied
electronics - no mixing brands.
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Motor
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This
class is restricted to a stock Traxxas Titan 12T R/C
motor550 12t and Reedy 17t RTR motor. All kit's
must run the motor that was supplied in the kit.
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Battery
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This
class is limited to any 6 cell sub c Nimh or 1 - 2S
7.4 Volt Lipo battery pack – Nimh can not exceed
4200 mah
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Tires
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Box Stock. No mixing Brands.
Slash must run the Slash tires, Sc10 must run the SC10
tires and so on. Must be 3.0” inside bead diameter x
2.2″ outside bead diameter.
Truck
must weight no less then 4.75 pounds ready to Race
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Mod
CORR Truck Rules: Same as above with the
following allowed upgrades
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Body
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Any Body.
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Chassis
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The chassis must be stock.
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Suspension
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Any Aftermarket shock, spring, or
piston allowed
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Legal
Tuning Parts
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All modifications and parts allowed
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Steering
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Any Servo may be used.
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Motor
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Any brushed or brushless motor may
be used.
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Tires
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Must be 3.0” inside bead diameter
x 2.2″ outside bead diameter.
All tires must be CORR Truck tires - no 1/8 scale
tires. Part of the large appeal to this class is it's
scale appearance, by running 1/8 tires on these trucks
they no longer have that scale look.
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