Home
Story
Schedule
Rules
Driver Profiles
Results
Points
Contact Us
Track Info
Media
2014 Mod Lite & Classic Dwarf Rules
CLICK HERE TO PRINT
2014 Mid Tenn Mod Lite & Classic Dwarf Car Rules
GENERAL RULES
1. Rules shall apply to all events at both tracks.
2. All vehicles are subject to inspection at any time.
3. Approval of a vehicle by the inspector shall mean only that
the vehicle is approved for participation in a competitive event and shall
not be construed in any way to mean that the inspected
vehicle is guaranteed mechanically sound.
Be it further declared that the inspector shall not be liable,
nor shall the sanctioning body, for any mechanical failure not for any losses,
injuries or death resulting from same.
SPECIFICATIONS BODY STYLES
Any car specifications not covered in these body specs are subject to Official interpretation.
Any significant performance advantage will be addressed on an individual basis.
Official reserves the right to determine what constitutes an unfair advantage.
a. 1928-1948 American-made production vehicles only,
5/8 scale, two-door sedans, coupes, or pickup trucks.
These are to be known as Classic Modified body styles.
b. Modified appearing body style such as IMCA or DIRT modified.
These are to be known as Modified Lite body styles.
c. All chassis specifications are the same for both body styles.
BODY REQUIREMENTS AND SPECIFICATIONS CLASSICS
Body must be 5/8 scale, stock appearing.
Maximum outside tire width 60", Cars must pass freely through a hoop 60 1/2” wide by 50” high,
73” wheelbase plus or minus 1".
1. Must have grill shell or simulated open radiator matching original body style, any material.
2. Doors, windows, and cowlings must retain stock appearance.
Hood louvers allowed for cooling, but must maintain stock contours.
3. Engine compartment must conform to scale and match contour of body.
Hole may be cut for breather clearance only.
Ram air induction system prohibited.
4. Must have closed trunk lid or fully enclosed trunk access panel conforming to original bodylines.
Louvers allowed no holes.
5. No fenders.
6. Wings or spoilers allowed but must maintain same rake angle as Mod Lite maximum of 14 degrees.
7. Ram air induction system prohibited.
Body will be metal construction, 26-gauge steel or .040" aluminum minimum.
Fiberglass or plastic grill shells allowed.
All exposed edges must be folded or trimmed over.
Legends cars may be allowed under local rules.
No lips or spoilers of any kind.
NO open top cars (roadsters, convertibles),
No panel trucks, station wagons, or specialty cars. Classic Overall Dimensions
1. NO car over 50” tall, top to ground.
Body height maximum 44”,bottom edge to top (including frame rail).
2. Maximum body width: 38” Maximum frame width 34”; min 30.
3. Roof hatch entrance allowed.
4. Frame ride height must not let car bottom out on track.
5. Drivers door must be operational and equipped with secure latch.
6. Fasteners on hood, trunk, or panels must be positive, locking type.
7. 124” maximum total length, bumper to bumper.
8. Kick outs or side nerf bars must be mounted at three points and run full length between tires.
1Ό” max .125 wall thickness.
Cannot stick out beyond 1” from the side of the tire.
MODIFIED LITE DIVISION
The intent of these preceding specifications is to follow the bodyline and design of a DIRT modified racecar.
Car must conform to either the Dirt Modified or the IMCA divisions.
Combination of the specifications is strictly prohibited.
IMCA body specifications will follow the specification listed.
(Body Demention Chart Here)
OVERALL DIMENSIONS DIRT MODIFIED DIVISIONS
A. 42" min 50" max from ground - total car height.
Body may be a maximum of 44” from the bottom
of the frame rail to the highest point of roof of car.
B. 128" maximum total length, bumper to bumper.
C. SIDES AND REAR QUARTER PANEL
a. 85" max - Door and rear quarter length.
D. 30" min 38" max - side height of rear quarter panel from the ground.
30” max height of quarter panel.
E. HOOD
a. 20" min 27” max - hood height excluding breather protectors (bottom of frame rail to top of hood).
Ram air induction system prohibited.
Rear of hood becomes part of windshield area rules.
No part of nose section (in front of spindle centerline) may be wider than a maximum of 24”.
Hood may taper out to door panels at the rear.
F. ROOF PANEL
a. 40" min 48" max - length of roof panel.
36" min 42" max - width of roof.
b. No part of roof panel may have more than 14o of angle rake.
c. No deflector of any type on upper sides or rear of roof panel.
d. Roof entrance hatch optional.
G. REAR UPPER QUARTER PANEL
a. 20" min 38" max rear upper side panel may contain Plexiglas.
b. Side panels maybe no higher than 3" at the rear of the straight line of quarter panel top edge.
c. Side panel may be no higher than an imaginary line from the rear
edge of roof panel to 3” above the top edge of the rear quarter panel.
H. SIDE WINDOW
a. 18" min side opening length. 10" minimum side opening height front and rear.
I. INTERIOR a. 46" min 50" max - width of rear shelf and body panels.
b. Rear shelf may have no more than a 5o max rake and may not be concave or convex in design.
c. No lips or spoilers of any kind.
d. The rear frame area from the rear shelf downward a minimum
of 16” must be completely enclosed the width of the frame.
e. Louvers allowed - no holes.
J. ADDITIONAL INTERIOR SPECIFICATIONS
a. 36" min 56" max - length of right side pod area with max 30o.
Left side pod may be altered for driver access.
b. Rear quarter distance from center of rear 20" min 30" max.
c. Cockpit cover with a max of ½” lip will be permitted providing the
on/off cutoff switch is reachable from outside the car by safety personnel.
d. Deck lid height from ground 30” minimum,
36” maximum with NO rear lip extending upward.
e. Side pod may not extend rearward past the centerline of rear axle.
f. Body must be centered on chassis.
g. If windshield is used, it must be flat.
h. All body dimensions will be teched + or – ½” unless otherwise specified.
K. REAR SPOILER
a. Must be constructed of aluminum or lexan material.
b. Must be single blade and mounted to the rear of the interior
body shelf and be no wider or higher than the inside of rear quarter panels. 50” max.
c. Maximum width of spoiler may not exceed 4”.
d. May be mounted at any angle but may not extend beyond or above
the rear quarter panel and may not be hinged or adjustable.
e. No bracing or supports on top, front, or back of spoiler blade permitted.
OVERALL DIMENSIONS IMCA DIVISION
All measurements in sections A-K apply with the exception of the following:
a. Side pod and rear shelf location must follow the same line and be
level with the top edge of the door panels and not extend beyond the
front edge of the door or beyond the rear edge of the rear quarter panel.
b. Hood may taper wider from the center line of spindles
to the outer front edge of the front door panels.
c. Side doors and quarter panels may taper out from top edge of the door
which has a maximum width side-to-side of 50” to the outside edge of both
rear tires maintaining a 50” width at the front edge of doors and the rear
edge of the rear quarter panels.
d. No part of the body or nerf bar may extend beyond the outside edge of the rear tire.
Side nerf bars may be mounted on the inside of the doors panels.
TIRES and WHEELS
a. 13" wheels only, minimum wall thickness of .090" 8" maximum width.
b. May run TUSA,American Racer, or Stars tire as long as it does
not stick any lower than 40 durometer.
c. Tires will be checked before and after qualifying.
d. May groove or sythe no chemical treating tires in any way or any other means of altering the rubber.
BUMPER DIMENSIONS
a. Front:
1. Maximum width 30"
2. Bumper height 6” to 8" with 2-bar loop.
3. Ground to top of bumper: 12” minimum, 16” maximum.
4. May not extend more than 12" forward of front tires.
b. Rear:
1. Maximum width 56” with 3 vertical bars.
2. Bumper height 6” to 8" with 2-bar configuration.
3. Ground to top of bumper: 12” minimum, 18” maximum.
4. May not extend more than 8” behind rear body panels.
c. Bumpers must be hollow with max wall thickness of .125.
FIREWALL
a. Firewall must be metal and must completely separate engine compartment from cockpit.
b. Engine protruding into cockpit must be enclosed.
WINDSHIELD
a. Windshield must be Lexan, wire mesh, or protection bars.
Lexan highly recommended when running asphalt.
No Glass. All other cockpit areas must remain open.
b. Deflectors may be used in front of driver.
1. May be no wider than roll bar area.
NERF BARS
a. Full length nerf bars between front and rear tires mandatory.
b. Maximum outside diameter of 1.25” and .125 maximum thickness. Must be hollow.
c. May not extend out beyond tread width more than 1" at the rear only.
SEAT
a. Seat must be high-backed aluminum, racing type.
b. All cars will have a permanent bar located behind top of seat at shoulder level.
c. Bottom of seat will not be more than 65" back measured from upper ball joint.
d. Seat may be tilted back for added driver head clearance and allow
for full containment seat bracing. However, no portion of the seat may be
back more than 74" as measured above.
NUMBERS AND GRAPHICS
a. Car number must be minimum 12" in height and 2" stroke.
b. Must be displayed on each side and roof or trunk.
c. Numbers in 4" size should be on front and rear of car to help with line-up
ENGINE SPECIFICATIONS (Classic and Mod Lite)
Engines eligible for this program:
Suzuki GSXR 1000, Honda CBR1000RR, Yamaha YZFR1, and Kawasaki ZX10.
2010 or older no exceptions this applies to mod lites and classics.
However there is some classics that are running the older carbureted motors that are acceptable and legal.
They must be in stock format and may run the after market flat slide carbs.
No porting polishing anywhere on these engines.
This is to allow the older GSXR and the ZX motors to compete
in original classic dwarfs along with the other older motors.
This rule will be considered for further vote discussion by the group if need be,
we will start here and see what happens.
There will be no protest fees imposed upon,
we will check the winning car for compression and adjustable cam sprockets
along with any port work on engine while bodies are off.
There will be three items checked besides the one listed above and they will be drawn by the winner.
They will be listed at a later date for all to know what they will be.
a. “STOCK” ENGINES - weight requirement 1275# for the Mod Lites
b. "STOCK ENGINES - weight requirement 1240# for the Classics
*1000 cc or less Water-cooled engines produced between
2000 and 2010 may compete in this program.
1. All engine components must remain stock OEM as per engine year.
2. Aftermarket air breather systems allowed with stock throttle
body grommets only. No aluminum velocity stacks allowed.
a. May change air filter with direct replacement. b. Secondary butterflies are optional.
3. Gaskets may be aftermarket but must remain at factory specs.
4. Oil pans may be changed or altered.
5. OEM electronic system only with no additions.
6. Gasoline only – no racing gasoline or gasoline additives 93 octane maximum.
No oxygenated fuels or nitro additives permitted. Fuel will be checked.
7. Engine must retain its stock fuel induction system with no other form of fuel delivery.
8. Alternator recommended but not mandatory.
General Engine” Specifications: All Divisions
1. Four cycle, four cylinders maximum only.
a. Must have working transmission, clutch, and starter with all parts in place.
b. Complete Clutch assembly must remain in engine.
c. External reverse boxes allowed.
d. No air controlled shifting devices.
2. Charging system optional.
3. Battery powered ignition system only.
4. Alternator cover allowed.
5. No auxiliary starters.
6. Engines must be front mounted in engine compartment.
7. Engine setback:
a. The "square of the engine" (rear fins of the jugs) may not extend
rearward more than 17" from the center of front spindle.
b. No part of the engine or transmission may extend rearward
more than 21 inches from center of front spindle.
8. No aftermarket fuel injection and no turbo system.
a. No nitro or nitrous oxide.
b. OEM fuel injection must remain stock.
9. Engine must be cooled by original intent.
a. May use extra fan or oil cooler.
10. Engine exhaust must include muffler and exit rearward.
a. All muffler devices must include baffles.
MUFFLER MUST MEET LOCAL TRACK REGULATIONS, (IF MANDATORY)
11. No form of traction control permitted.
12. Carburetor/Fuel injection boot must fasten directly to head in the stock intake port location.
13. Header must attach directly to head in stock exhaust port location.
14. Oiling system may not include a dry sump system.
15. No increasing or decreasing of engine stock stroke in any way.
Engine Tech Procedures
1. Cylinder cranking compression- minimum 100p.s.i.,
Maximum 220 psi per cylinder average of 4 cylinders, no variance,
measured with a Snap-On compression gauge,
part number EEPV303A, with adapters EEPV304A,
EEPV306A or MT26J200, after ten (10) compression revolutions of cranking,
15-45 minutes following feature event.
2. Carburetors or Fuel Injection and all 4 spark plugs must be removed before checking compression.
BATTERY, FUEL SYSTEM
a. Battery and fuel pump must be mounted outside driver compartment.
1. Battery must be secure and held with non- rubber strap.
2. Electric fuel pump allowed.
b. Fuel cell mandatory, maximum 5 gallons, located in trunk area.
c. Reinforced or steel braided line must be used in all high-pressure areas.
d. A direct manual cutoff switch wired to ground circuit will be installed
on the right rear shelf or rear fire wall within 6”
of the corner formed by the rear deck and rear fire wall.
1. Switch will be located over the right shoulder of the driver.
2. The emergency electrical cut off switch will be clearly located and marked.
DRIVE TRAIN
a. Must use steel drive shaft from transmission to automotive rear end.
1. Minimum 2.50" x .083" or 2" x .120".
2. Suggested to be painted white.
b. Quick change rear ends allowed with steel side tubes only.
c. Drive shaft tunnel must have minimum of 2 (3 recommended) 360-degree hoops between firewall and seat back.
1. Must be fabricated of minimum .1875" X 1.5" steel bar. 1" X .095" steel tube highly recommended.
d. Rear must be locked or have a solid spool.
FRAME AND ROLL CAGE
1. Main frame members will be minimum of 1" X 2" x .120" wall rectangular steel tubing only.
2. Main frame rail consist of the length between the front lower a-arm
cross member and the rear main roll bar upright.
3. No aluminum allowed in cage or frame.
a. Main frames will have a minimum of 3 cross members between firewall
and back of seat fabricated of same material as frame rails.
4. Alternate material may be steel angle, min. .125" X 1.5" X 2".
Cross-bracing in floor under driver strongly recommended.
5. Rear frame rails at rear roll bar must be 34” max and 30” minimum outside dimension.
6. Rear roll bar must meet same dimension as the frame it is mounted to.
Frame may taper forward of driver seat area.
7. Front engine area frame width must be 24: max and 20” min outside dimension.
Left and right frame rails must be the same + or – ½”.
a. Roll cage must be DOM steel minimum 1.25" x .083" (.095 recommended)
in all cars manufactured from 12/98 on.
8. Clubs may grandfather older cars with 1" x .065" tubing.
Cross-brace or diagonal strongly recommended in hoop over driver's head.
9. Roll cage may not be more than 44” from bottom of frame to top of cage.
d. All cars must have cage bars installed across door openings on both sides.
10. Bars should be welded in place as part of roll cage. Driver door only must be operational.
11. Minimum size 1" x .065". (1.25" x .095" recommended) cars with bars
mounted on doors should have full doorframe and minimum of 2 horizontal
cross bars. Minimum 1” x .083".
12. Cars with bats mounted on doors must have 1/4" x 2" steel stops welded
in on each side of opening, totaling a minimum of 4" on each end of door.
a. It is required to have a steel bar with a minimum size of
1" X .065" from doorpost to doorpost, under the dash.
13. Steel plate on driver's door bars recommended.
14. It is recommended that, if using rivets, body panels attach to tabs
welded onto cage instead of drilling multiple holes into cage bars.
15. No down tube frame cars allowed.
16. Any bars going from cowl area to snout must remain below the upper line of hood.
17. Classic pickups may have two (2) bars going from upper rear roll cage down to rear clip.
SUSPENSION
1. Front suspension must not extend rearward past the most forward panel of the firewall.
2. Aluminum spindles are optional.
3. Coil over shocks must be attached directly to the lower a-arm and upper front chassis.
4. Rear trailing arm/radius rod specifications:
5. Arms may have a maximum length of 30”.
6. Torque-absorbing devices are permitted.
7. Maximum 3 radius rods or 3 link suspension:
a. One trailing rod must be attached to each side of the rear housing by a bracket;
either clamped or welded directly to rear housing.
b. No “birdcage” type mounting of any kind permitted.
c. No linkages of any kind permitted.
Third radius rod must be mounted in a way to control the rotation of rear housing only.
d. This rod may be adjustable but have no other function.
e. A torque-absorbing device may be used in this location.
f. A lateral panhard or “J” bar will be used to maintain rear-housing position in chassis of car.
g. No cantilever or linkage suspension in front or rear permitted.
Shock with spring must be attached directly to rear housing mounts.
c. Wheel offsets are allowed.
d. Hub offsets are NOT allowed.
1. Hubs front and rear must be within 1/2” distance from mainframe
rail on either side of car, measured from center of rotor to vertical plane
of frame rail.
a. Coil-over shocks are the only allowable means of supporting the chassis.
One shock and spring per wheel only.
Shock and spring must remain as one unit.
b. Shocks must be steel bodied with no alterations to the external
body of the shock. Retail price of the shock may not exceed $100.
c. No driver shall have the ability to adjust suspension from inside car.
d. Straight front axles are prohibited. Local clubs may grandfather existing cars for competition.
e. No leaf springs.
f. No birdcage type rear linkage.
g. Anti-roll (sway) bars permitted front or rear.
Must be connected without adjustments to arm location.
h. No torsion bar suspension system of any type allowed.
j. The use of carbon fiber or titanium in any way is prohibited.
STEERING
a. All steering components must have safety fasteners such as cotter pins or self-locking nuts.
b. Manufactured quick-release steering wheel hubs mandatory.
c. Rack and pinion steering is mandatory.
BRAKES
a. All four wheels must have calipers, rotors and brake pads.
b. Rotors and calipers:
c. Adjustable brake bias and wheel shut offs allowed.
d. Competition-type master cylinders allowed.
1. Steel rotors mandatory, .225 minimum thickness.
2. Steel OEM calipers or aluminum calipers allowed.
3. Cutting & scalloping of rotors will be allowed with no rotor surface
being less than 3/4” in width in the upper scalloped area.
4. Drilling of rotors is permitted.
SAFETY EQUIPMENT
a. Fire bottle system HIGHLY recommended.
b. Recommended driver uniform will consist of:
1. Fire suit (single layer minimum, one or two-piece).
2. Fireproof gloves.
3. Fireproof shoes.
4. Approved helmet with Snell 95 or higher.
5. Full-face helmet.
6. Head and neck restraint systems recommended.
c. Car must be equipped with 5-point safety harness,
no more than 3 years old, with minimum of 3-inch belts.
d. Aluminum, high-backed racing seat mandatory.
e. Window nets, arm restraints and head & neck restraints HIGHLY recommended.
COMMUNICATION
a. NO two-way radios. One-way communication from officials only is allowed.
VISUAL AIDS
a. NO mirrors allowed.
DRIVER QUALIFICATIONS
a. All drivers must be a minimum of twelve (12) years of age.
All drivers under 16 years of age MUST have a signed waiver by parent or guardian.
This rule will be governed by track regulations.
General Conduct and Responsibilities
(a) No intoxicating spirits or controlled substances are to be consumed
before or during race events by anyone entering the pit area of tracks.
(b) Official reserves the right to reject or allow entry of any driver or car.
(c) Abuse or confrontation of any racetrack or official and/or use
of abusive language is strictly prohibited at all times.
FAILURE TO ABIDE BY THESE RULES MAY RESULT IN SUSPENSION,
LOSS OF POINTS, WINNINGS, RECORDS, AND/OR CASH FINE.
(d) Any disputes involving qualifying times, lap scoring,
finishing position is under the jurisdiction of the hosting track officials.
Officials will address winnings, points, or rules interpretations.
Any disputes or discussions of this nature are to be held with officials only.
(e) THE DRIVER ASSUMES RESPONSIBILITIES FOR THE ACTIONS OF THEIR PIT CREW AND GUESTS.NOTICE:
IF AT ANYTIME, (DRIVER,CREW MEMBER) TAKES AN AGGRESSIVE APPROACH TOWARD MEMBER OF ANOTHER TEAM
OR TRACK OFFICIAL WHETHER IT BE VERBAL OR PHYSICAL, or CYBER,
CRIMINAL CHARGES WILL BE APPLIED AND YOU ARE DISQUALIFIED FROM WEEKS EVENT
AND POSSIBLE SUSPENSION FOR REST OF SEASON.
ABSOLUTELY NO ALCOHOL OR CONSUMPTION DURING EVENTS POSSIBLE
SUSPENSION AND DISQUALIFICATION WILL OCCUR (ZERO TOLERANCE).
THIS IS A FAMILY ORIENTED GROUP SO PLEASE CONDUCT YOURSELF
ACCORDINGLY HAVE FUN AND HOPE YOU ENJOY, PLEASE BE SAFE.
MOTOR RACING IS A DANGEROUS SPORT AND MAY RESULT IN INJURY, BODILY HARM, OR DEATH.

Counter