Mr. Dirt RC Series



          We would like our racers and spectators to enjoy themselves in a fun, competitive racing environment by implementing a simple set of rules that are racer friendly and cost effective.  Our focus shall be on Eastern Dirt Modified (EDM) , Sprint Car and Late-Model racing.  Whenever possible, the series will aim to welcome auxiliary classes governed by other bodies (i.e. Trucks, etc.).


Race Format:

          The race format will be determined and announced prior to the race with the intention that racers will know exactly what to expect of the race regardless of track size and weekly track programs.  Refer to the series schedule for track information and race lengths.

          All series races will utilize the same set of “house” transponders, however personal transponders are also welcome and encouraged.  The same AMBrc Decoder, laptop computer, and  software will be used at each race.  An appointed Race Director will conduct each race as well.


Class order:

1. Small Block EDM

2. Sprints

3. 2WD Late-model

4. Big Block EDM

5. 4WD Late-model

6. DODC Spec EDM


*Auxiliary classes may precede, follow, or be in between series classes in an attempt to allow time for multi-class racers to prepare.


-All heat races will be four (4) minutes in length.

-All Qualifiers will be Ifmar style races.

-There is a six (6) car maximum for each heat.

-Fastest time qualifies your position in the mains.

-2 Rounds of qualifying minimum.



-All Lower Mains will be 4 min. in length

-2 cars will bump up from each lower main

-A Mains may be either 4 or 5 min. races, or lap races, varying from 75-100 laps depending on track.

-All races will be heads-up style races.




All classes will utilize DODC Stock Rules as listed here:


Class Specifications:

Small Block EDM:

-Foam Tires only

-Any Roar Legal 17.5 Brushless Motor and Lipo

-Any Roar approved ESC

-All ESC's in Roar Approved Spec/Blinky Mode only

-EDM Bodies per the DODC Old Style (sail panel style) rules (listed in detail below under the Big Block Rules)

Top 3 drivers in the A Main, Top Qualifier and randomly selected drivers will be subject to ESC software check.


-Foam Tires only

-Any Roar Legal 13.5 Brushless Motor and Lipo

-Any Roar Approved ESC

-Bodies and Wings per the following DODC Rules:

Sprint Car Bodies:
-Must have scale appearing cage, hood, side panels, fuel cell, nerf bars and front and rear bumpers.

-All cage and body components such as cage, bumpers, nerf bars, hoods, side panels, tanks, etc. must be mounted on the center-line of the cage. -Chassis may not extend outside of the side panels by more than 1/4" on either side.

-All electronics, radio gear, fuel tanks, transmissions and gears must be positioned inside the cage side frames.

-Three dimensional scale appearing exhaust headers must appear on both sides of car in “engine area” (left side of nitro sprint is optional).

-Rear cage side panels may be used but may not extend beyond cage frame more than .250".

-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.

  • Maximum Length: 18.000"
  • Maximum width of hood: 3.600"
  • Maximum Chassis width: 4.025"
  • Maximum cage width at driver halo, down tubes, and top frame rail: 3.600"
  • Minimum vertical gap from top of hood to bottom of front cage crossbar: .750"
  • Wing minimum height at leading edge: 5.000" from bottom of chassis

Sprint Car Wings:

-Center section and side panels must be made from at least 3 separate pieces of polycarbonate, carbon or aluminum material.

-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” turn-down at the leading edge.

-The 6x6" wing will be the standard Sprint Car wing size. Race organizers and series directors may at their discretion allow the optional 7x7" wing rule for races and series using buggy or rubber tires.

-Top wings are mandatory and front wings are optional for all sprint classes. Race organizers may also choose to run wingless sprint classes at their discretion where top and front wings are not allowed.

1/10 2wd 17.5 Late-models:

-Any Roar Legal 17.5 Brushless Motor and Lipo

-Foam Tires only

-No Side Dams

-Any Roar Approved ESC

-Bodies Per DODC Rules:

-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.

-All four wheel wells must be cut out to appropriate scale dimensions.

  • Rear Spoiler: maximum chord is 2.75" from body deck including any wicker-bills.
  • Maximum rear deck height from bottom of chassis is 4.0"

Approved Bodies:

  • Custom Works #9012 Eldora Late Model
  • Custom Works #9014 Paducah Late Model
  • Custom Works #9015 Springfield Late Model
  • Custom Works #9016 Paducah 2 Late Model
  • Custom Works #9070 Keystone Late Model
  • McAllister #207 Tulsa Late Model
  • McAllister #250 Vegas Late Model
  • McAllister #252 Winchester Late Model
  • McAllsiter #237 Bakersfield Late Model
  • BMS Racing #P103 Shadow
  • Factory Works #7353 Rocket Late Model
  • Factory Works #7357 Concord Late Model
  • C&M Bodies #2010 Volunteer Late Model
  • C&M Bodies #2010-003 Nightmare Late Model
  • C&M Bodies #2011-001 Volunteer 10"
  • C&M Bodies #2011-002 Nightmare HD 9.5"
  • Stalker Bodies #009 Sniper 9 Late Model
  • Stalker Bodies #010 Sniper Late Model
  • Stalker Bodies #011 Specter 9.5
  • Stalker Bodies #012 Specter 10
  • Stalker Bodies Specter 9.0

Big Block EDM:

-Any Roar Legal 17.5 Brushless Motor and Lipo

-Foam Tires Only

-Any Roar Approved ESC

-ESC must be in Roar Approved Spec/Blinky Mode at all tracks except The Bakery and Wizards Raceway

-EDM Bodies per DODC Old Style Rules:


-Hoods optional (Mr. Dirt Provision)

-Body must be made of .020" thick Lexan


-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 overlap side or sail panel. As an alternative side window material may be removed but A pillar must still remain in tact from front of door to front of Roof.

-Roof, windows, side and sail panels must be symmetrical.

-Front edge of Door/side panel may not extend past the center-line 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 wicker-bills

1/10 4wd Late-models:

-Any Roar Legal 13.5 Motor and Lipo

-Open ESC

-Foam Tires only

-DODC Approved late-model bodies only

-No Side Dams


-DODC 17.5 Motor and 3200 Lipo

-Foam Tires only

-Any Roar Approved ESC

-ESC must be in Roar Approved Spec/Blinky Mode

-Bodies Per DODC Spec EDM Rules:

-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 must remain clear.

-No rear wheel cutouts are allowed on the horizontal plane of the inner.

-Right and Left rear wheel wells must be cut out to appropriate scale dimensions.

Dimensional specifications Drawing:

  • All fabricated body panels ie: Doors, Windows, Roof, and Inner Panel must be made from minimum .020" thick lexan/polycarbonate material (.020" measurement does not include any decal or wrap)
  • All Vacuum formed body panels must be pulled from minimum .030" thick lexan/polycarbonate material. Separate hoods and front body panels may be pulled from .020" lexan/polycarbonate material.
  • Inner panel and spoiler can not extend beyond front or rear of side panels
  • Inner panel must be flat (on 1 plane) from spoiler base to a point within 1.5" from front of door.
  • Maximum length of complete car: 19.5"
  • Both sides of body must be at 90 Degrees to the rear of body and or spoiler
  • Door/side panel may have a 90 degree "BEND IN" max 3/8" at bottom for strength
  • Maximum front bumper width: 5.0"
  • Front body panel max width: 4.0"
  • Front body panel max chord length: 3.00"
  • Rear spoiler: max chord is 3.0" from body deck including any wicker-bills
  • Left Side Panel must be inside a straight line drawn from the outside of both left side wheels/tires and outside of left side of chassis.
  • Bodies must have at least 1/3 of right rear tire exposed when viewed from front, top and rear of car.

-Inner panel must have SCALE APPEARING hood that extends from at least the door leading edge to at least the leading edge of the roof.

-The following specifications are relative to the hood in the area defined in previous sentence.

  • Hood must be centered on inner panel
  • Hood Width: Minimum 2.5"
  • Minimum hood height for entire length is: .750"
  • Clearance between top of hood and leading edge of roof is min. 1.0" and max 2.0"

Please refer to the DODC Rules listing on to see templates.


Modified EDM:

-Any Roar Legal Motor and Battery

-Open ESC

-No Weight Limit

-Foam Tires only

-EDM Bodies Per Mr. Dirt Rules

Mr. Dirt EDM Body Rules:
1. All cars must have an EDM body. No wedge, buggy, truck, on-road etc.
2. All bodies must be made of polycarbonate. No aluminum, etc.
3. No side dams, other than “sail panels”.
4. All drivers are encouraged to have their bodies numbered and painted.
5. Maximum body height is 7-3/4”, measured at any point.
6. Maximum body width is 8”.
7. Door panels may not extend past the center-line of the front axle.
8. Right rear tire must be at least 1/3 exposed.
9. Front tires must be fully exposed.
10. Front nose piece may not exceed 4-1/2” in width.
11. All measurements will be given some tolerance at official’s discretion.
12. Body can be made of .020" or .015" Lexan

1/10 Losi Sliders:

-Must use box stock motor, tires and body

-3200 mah max Lipo may be used

-Must use stock servo and Radio

-Aftermarket BRUSHED Motor ESC may be used

-Ball Diff, bearings, aftermarket tie rods and shock shafts may be used.

-Shock pistons, springs and oil may be changed to tune car to track


1/10 Trucks:

-Must use truck length arms, truck bodies and truck tires.

-Tires may be foam or rubber street treads.  No spike or mini pin tires allowed.

-Any Roar Legal 17.5 Brushless Motor and Lipo

-Any Roar Approved ESC

Other Rules:

-Only foam tires will be allowed in all EDM, Sprint, and Late-model classes.  1/10 Trucks, if they are to run, may run street treaded rubber tires in addition to foams.  Losi Sliders must run kit tires.

-Voltage Rule - 8.44 Volts for Lipos.  Random voltage checks will be made throughout each event.  If you are found to be over-charging (purposely), you will be disqualified for the entire event.


-Racers are limited to running only three (3) classes per event.  This includes any auxiliary classes.


-During all qualifiers and mains, a car that misses the scoring loop loses that lap.  Missed laps will not be replaced at the end of the race.


-It is the responsibility of the individual race facility to provide the appropriate scoring loop antenna to be buried under the track as well as coaxial cable to connect the AMBrc Decoder to the loop.


-Marshaling duties are the responsibility of each racer.  After a race is completed racers listed at 1 through 4 must marshal the subsequent race.  A racer in a bump-up position is not required to marshal.  In this case the next racer from the list will marshal.  If for any reason a racer is unable to carry out their marshaling duty, it is the responsibility of that racer to provide a substitute.  If a racer’s marshaling position is not covered by the time the next race is ready to begin, that racer’s fastest qualifying time will be disqualified.  A station will be provided for racers to temporarily place their car and radio while carrying out their marshaling duties.

-Top 3 finishing drivers may be teched for weight, correct motor/lipo/ESC software, at race directors discretion.



Point System:

1st – 100 points

2nd – 95 points

3rd – 90 points

4th – 85 points

5th – 80 points

6th – 76 points

7th – 72 points

8th – 68 points

9th – 65 points

10th – 62 points

11th – 60 points

12th – 58 points

13th – 56 points

14th – 54 points

15th – 52 points

*All others will receive 50 points.


2012 Series Directors:

1st Director- Dylan Watier

2nd Director- Matt Olmsted

Race Director- Steve Harris (or substitute appointed by series directors)

Series Secretary- Dylan Watier

**Future Director positions may be created to fulfill the needs of the series as it grows.












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