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Dwarf Car Rules
With the
nostalgic look of early stock cars, Dwarf Cars
are scaled copies of 1928 to 1948 vintage
American coupes, sedans and trucks. They are
powered by a motorcycle engine. The bodies are
scaled down versions of full size cars.
UPDATED
January-2010
The following
are "COMMON SENSE" type rules. Our objective is
to minimize rule changes. Do not attempt to
build a Dwarf Car without first contacting a
WSDCA Board member for rule clarification. No
exotic equipment, (meaning unusual or out of the
ordinary). If a car is built that does not meet
the Dwarf Car specifications, it will not be a
Dwarf Car. Interpretations of or amendment to
these rules may be made at anytime. The rules
and/or regulations set forth herein are designed
to provide for the orderly conduct of racing
events and to establish minimum acceptable
requirements for such events. These rules shall
govern the conditions of all events, and by
participating in these events, all licensees
will be deemed to have complied with these
rules. No express or implied warranty of safety
shall result from publication of, or compliance
with, these rules and/or regulations. They are
intended as a guide for the conduct of the sport
and are in no way a guarantee against injury or
death to participants.
If it doesn't say it in this rule book, you
can't do it!
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BODY TYPES
A.
There will be no special class of cars; all oval
track Dwarf Cars run under the same competition.
B. Car
body will be of 1928 to 1948 vintage coupe,
sedan, sedan delivery, wagon, or pick-up truck.
Must have been a production car. All frames and
roll cages, including firewall, doors, and rear
section framing, must be fabricated as a single
frame unit, already forming the actual contour
and dimensions of the finished body. Sheet metal
outside skins must be secured with Dzus type
fasteners, or permanently attached by rivets or
spot weld no more than 12" between each
attachment point located at the perimeter of
each panel where it meets the roll cage,
firewall, or trunk framing. Skin must not bulge
or gap open between attachment points. Any gap
or hole exceeding 3/8" must be covered with
sheet metal, a plug, or permanent type sealant.
C. No
open top cars such as roadsters or convertibles.
No convertible bodies with hard tops or "T"
tops. The cars must be replicas of factory stock
bodies. They must have full roof of metal
construction. The roof shall start at the top of
the cowl in the front of the car and extend,
ending at the top of the trunk. Roofs must
incorporate a front and a rear window. The
windows must be cut to simulate to match the
original body and shall extend inward to cover
the roll cage in the front and the rear. No part
of the roll cage shall be exposed. All roll cage
bracing must be intact, permanently welded.
Enter and exit by door only. Doors must be
functional and driver must be able to exit from
either door safely.
D. No
foreign makes. Only closed top, meaning hardtop,
American passenger cars or trucks.
E.
All cars will be of metal construction. No
fiberglass, plastic, nylon etc. No aluminum for
frame or roll cage. Outer skin shall be a
minimum of 26 gauge steel or .040 aluminum.
Firewall between engine and manned compartment
is mandatory. There must be a complete firewall,
front and rear separating engine and trunk
compartments from manned compartments.
F. No
fenders of any type. No structure of any type to
simulate or act as a fender. Doors and windows
must remain in stock appearance and location.
Body must be skinned to match it's type. (i.e.
3-window couple must be skinned as a 3 window,
not as a 5-window). Right and left doors must be
operational and allow passage. Windows and door
must be near scale size, shape and location. All
doors must be hinged as to open.
H.
Each car will have grill shell and simulated
original grill matching it’s body style or a
simulated radiator and vertical loop mounting
bar mounted in near stock location and a hood to
match radiator size and body style as not to
distract from overall appearance. No grill is
required if simulated radiator is used.
Functional radiator may be mounted in the trunk
area.
I.
Engine compartment must conform to scale of body
length and must match contour of body where it
meets the right and left side of body panels.
Firewall or cowling outer skin must be stock
appearance in size and shape; only inner panel
may be altered.
J Any
hood may be notched, bent or cut in such a
manner as not to distract from the stock
appearance or on car using a radiator/simulated
radiator, hoods may not be altered so as to
detract from neat appearance.
K Hood
scoop height ( ie: carbs, air cleaners, hood
scoop) will be measured from a straight line
projected out from the rear most portion of the
hood. The maximum cowl height is 24" measured
from the top of the frame rail to the top of the
cowl. No part of hood scoop (ie: carbs, hood
scoop, air cleaners) shall exceed 28". The hood
scoop may not exceed 4" above that line and at
no place on the hood may the hood scoop exceed
5". A tolerance of ½" will apply. There will be
no obstruction of the drivers view.
L. At
the beginning of race night, all cars must have
all body parts intact.
M. No
airfoils, wings or streamlining of body.
2. DIMENSIONS
A.
Maximum car height, 48", top to ground.
B.
Maximum body width, 38".
C. 40"
maximum body height from bottom of frame rail to
top of car.
D. The
slope of the roof may not exceed 3 1/2" measured
from the highest point in the rear just before
the main cage starts to turn downward, to the
lowest point just before the main cage starts to
turn downward. The slope on the front hood
should remain in proportion to the rest of the
body.
3. TIRES and
WHEELS
A.
Steel wheels only, 13" WHEEL ONLY, 7" maximum
width
B.
Hoosier Tires shall be the spec tire. Hoosier
Mediums or RC3's.
C. No
softening compounds will be allowed.
D.
Hoosier decals must be displayed on both sides
of car.
E.
Offset wheels are OK.
F. No
bead locks.
G. No
Battle bead style wheels allowed.
4.
WHEEL BASE
A.
Wheel base 73" (1/2" tolerance allowed) measured
at the center of the spindle to the center of
rear end housing.
B.
Outside tire width not to exceed 61" (must be
able to pass through 61" opening)
5. FUEL
A.
Pump gas, aviation fuel, racing gas.
B. No
nitrous oxide, no alcohol. NO nitro or propylene
oxide type additives.
6. FUEL CELL
A. Not
to exceed 5 gallons.
B.
Tank must be vented so as not leak fuel in any
position, non leaking cap.
C.
Fuel cell must be mounted between frame rails,
in trunk.
D.
Fuel cell must be mounted with metal straps
only.
E.
Must have complete fire wall between driver and
fuel cell.
7.
CARBURETED ENGINES
A.
Motorcycle engines only. No snowmobile or other
special application engines. 1250cc is the
maximum allowable displacement. Any questions
about approved motors, please contact WSDCA
officials.
B.
1250 cc maximum, 4 cycle, 4 cylinders maximum.
C.
Must be a regular production (minimum of 500
units per year)
D.
Must have working starter, clutch and
transmission in place.
E.
Charging system optional.
F..
Must be naturally aspirated.
G..
Engine must be cooled by original intent. May
use extra fans or oil cooler.
H..
Exhaust and headers must be installed so as not
to detract from stock appearing hood, with the
exception of side panels.
I..
Muffler are mandatory, 95 dba @ 100'.
J.. No
auxiliary starter.
K.
Fuel Injected Motors:
No other modifications shall be allowed except
the items listed below: (If it doesn't say it,
then you can't do it or use it!)
1k. Motor must be 2 years old to be
legal. The manufacturer model year will
determine the year of the engine.2008 motor will
be legal for the 2010 racing season. Newer model
motors have not been approved for the future at
this time.
2k. OEM fuel injection only. Fuel
injection may not be modified in any way from
it's original OEM specifications. OEM ignition
systems only. No after market fuel injection
allowed.
3k. After market boxes that adjust
Fuel Curve, Timing and RPM, that are
approved, are the only boxes that are
allowed. The boxes that are approved are the
Dynojet 2,3,3R and 5, The Dobek 2 brothers and
the Bazzaz ZFi.The Dyno jet 3 with the USB is
allowed with no external modules plugged in. Any
boxes of this type, other than those specified,
will only be approved at the annual meeting.
4k. Any car that is discovered to have
any other electronic devices other that those
outlined above, or who has made any
modifications to these allowed boxes or any part
of the fuel injection, may be disqualified.
5k. Timing retard eliminators and gear
position indicators are allowed.
6k. No electronic devices will be allowed
in the cockpit area or adjustable by the driver.
No other electronic devices that plug into
engine or wiring harness are allowed. Final
determination will be made by WSDCA officials.
7k. Engines must have stock bore and
stroke with no more than 1 mil. over bore over
the original factory specifications for the
engine manufacturer.OEM bore and stroke only.
(The 1 mil. over bore is intended for cleanup
only, not aftermarket pistons.)Engines will be
checked with a bore and stroke guage and must
not exceed manufacturers original cc's for that
motor.
8k. Unmodified OEM cylinder heads only.
9k. Cam-shafts must have stock lift and
duration, adjustable cam sprockets are allowed.
8.
DRIVE TRAIN
A. Must
use steel drive shaft from motor to automotive
rear end.
B. Drive
shaft must have a minimum of 3 360 degree loops.
One near each end, one in center. Must be
fabricated from a minimum 3/16" x 1-1/2" steel
bar, or 1.00" x .065 steel tubing.
C. No
quick change rear ends.
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No
quick change in the entire drive system,
meaning from motor.
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Drivelines must be painted white.
9. FRAME and
ROLL CAGE
A. Roll
cage must be constructed of a minimum 1.25".065
wall OD or 1.5" OD x .065 wall tubing in the
main roll cage. Secondary members will be a
minimum of 1" OD x .065. wall.
B. All
lower frame side rails will be a minimum of 1" x
2" rectangular tubing with a minimum of .120"
wall. The lower frame rails on the extreme right
and left side, may be horizontal or vertical,
but must remain continuous from extreme front to
extreme rear. Whether laid horizontal or
vertical, it must remain that way all through
the frame rail. Does not include cross member.
If frame rail is cut, it must be gusseted with 1
x 2" .120 wall. No round, oval or square tubing
in lower side frame rail. No overslung rear
frame rails.
C. There
will be a minimum of three (3) cross members in
the main compartment; one at the forward end,
one in the center and one at the rear. The cross
members will be made of steel only, with a
minimum wall thickness of .120". Cross members
may be round, oval, square or angle.
D. The
right and left doors must have a minimum of two
bars with a minimum of.065" wall x 1" OD tubing
welded through the midsection of the door frame.
The bar supporting the drive shaft tunnel may be
included as one of these, only on drive shaft
side. Drive shaft side of car must have one bar,
minimum of .065" wall x 1" tubing, welded inside
to front and rear door post positioned
horizontally.
E. All
cars will have a permanent structure support
bar, located behind the seat at approximatley
23" above the frame rail, extending from side to
side. The bottom of the seat will not be more
than 63" back, measured from the upper ball
joint to the center of the seat at the height of
the permanent structure bar. The seat may be
tilted back for added driver head clearance,
however, no portion of the seat may be back more
than 68" as measured above. A seat pan must be
welded in place, using a minimum of 14 gauge
steel.
10. ENGINE
LOCATION and SET BACK
A. All
engines must be front mounted, in stock location
for model of car.
B. Engines
may not be extended more than 12" to either side
of car body center line.
C. Engine
set back is the square of the motor (rear fins)
may not extend more than 17" from center of
front axle. No part of the engine or
transmission may be more than 21" set back, as
measures above.
11.
SUSPENSION
A. Front
suspension must not exceed 25" measured from the
ground to the highest point of any front
suspension, or extend rearward past the most
forward panel of the fire wall, except under
frame rail, where it can not be seen from either
side.
B.
Steering components must have safety fasteners,
such as cotter pin or self locking nuts.
C. If
steering box is mounted in front cowling, the
pitman arm may not extend more than 1 1/2"
outside the natural contour of the body near
that point, and must not prevent proper door
operation.
D. The
center of the front and rear axle will be
mounted in the center of the frame from side to
side, (1/2" tolerance is allowed).
E.. No
Straight axles.
F. No Leaf
spring or torsion bars.
G. No Bird
Cage type rear linkage or Jacob's ladder. 3 link
suspension only
H. Steel
shocks only, one shock per tire. 4 shocks only.
Coil over type shocks and springs only.
I.
Trailing arms, located outside of frame may not
extend beyond the rear door post.
J. No
exotic type power steering with cam driven
pumps.
12. WEIGHT
A. No
car shall weigh under 1,000 pounds without
driver. In the event that multiple cars are not
meeting the weight requirement, the accuracy of
the scales will be considered by the head tech
official.
B. No
ballast will be mounted outside of body or
frame. All ballast must be securely bolted or
welded inside of body or frame rail and extend
no lower than frame rail. Ballast will be
painted white and have the car number clearly
marked.
13.
NERF BARS and BUMPERS
A.
Front bumper must be no wider than 36" and a
minimum of 24" and will not extend more than 6"
forward of front tires.
B.
Rear bumper must be no wider than 50" and a
minimum of 40" and will not extend more than 6"
from extreme rear body panel, or 8" if the car
has a simulated fuel tank.
C.
Front and rear bumpers must be a minimum of 4"
above the ground, and a maximum of 14". A 2"
extension bar may be allowed on top of the
bumper, but must not exceed 16" high from the
ground.
D.
Bumper will be a minimum of 6" wide vertically.
E.
Bumpers are to be made from 1" round tubing
.065" minimum, and .095" maximum
wall.
F.
There will be no sharp points or edges.
G.
Nerf bars must be mounted on both sides in front
of rear tire and be no more than 18" from center
of rear axle to rear of nerf bar. A minimum of a
three (3) point mounting is required. The lower
bar must be parallel to lower frame rail from
the rear of the car then curve or bend toward
lower frame rail. The upper bar is to attach to
the roll cage a maximum of 18" above the rear
attachment point of the lower bar. An additional
diagonal brace from frame rail to lower bar is
strongly recommended. Nerf bars must not
interfere with the opening of either door and
must roll through a 61" opening.
H.
These nerfs will be constructed of round tubing
065" x 1" OD, and a maximum of .095" x 1" OD
wall tubing. Lower bars may not extend more than
1" past the tire tread in rear only. Must roll
through 61" opening.
14.
ELECTRICAL
A. All
batteries must be rear mounted (trunk area).
Batteries must be securely mounted with a top
restraint made of metal. Restraint must also
hold battery caps.
B.
Cars should have master electrical switch
clearly located and marked.
C. No
electronic (i.e. computer) traction devices. No
electronic or manual devices will be adjustable
by the driver during a race. Any such devices
shall be mounted outside the driver’s
compartment. Any such devices must be on the
approved list from rule 7K.
15.
BRAKES
A.
DIRT: Must have at least two (2) brakes
controlling 2 wheels.
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ASPHALT:
Must have four (4) wheel brakes.
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Brake
Bias manual devices are allowed inside the
driver compartment.
16.
SAFETY
A. All
inside suspension mounts must be shrouded from
drive compartment. No sharp edges or protruding
objects which could endanger driver, shall be
inside drivers compartment. All cut and free
standing edges must be folded, molded or filed
smooth (i.e. window and door edges).
B. All
cars must have an approved 5 point racing
harness, equipped with a quick release buckle.
Both ends of harness must be attached to the
frame of the car with, not less than 3/8" grade
8 bolts. All seat belts will be installed at a
45 degree angle to the drivers hips. Shoulder
harness comes from behind the driver, and will
go over both shoulders so that they will be held
securely in the seat. (all safety restraint
harnesses will be installed in accordance with
manufactures guidelines). Seatbelts must be
replaced or recertified every 2 years.
C.
Approved racing type helmet with current snell
rating are to be used. (SA-2000).
D. All
cars will have a production made quick-release,
removable steering wheel.
E. All
cars are required to have a fire extinguisher. 5
Lb. Halon on board fire system with a minimum of
2 nozzles installed is highly recommended. If a
portable type fire extinguisher is used, it must
be mounted inside the car easily removable by
driver with one hand while in belted position.
All pits must have a minimum of a 2 lbs. fire
extinguisher accessible in their pits.
F. All
drivers must wear an approved driving suit.
Single layer fire suit is minimum.
G. All
drivers must wear an approved neck brace and
fire proof gloves. It is strongly recommend to
use a head restraint device. These devices may
become mandatory by the tracks in the future.
H.
When racing on asphalt, a catch can for oil and
water is required.
I. All
door latches must be a positive locking device,
so as not to open from vibration or up set, and
not to jam if door is damaged. All hoods and
trunks must be securely fastened by, spring
latch, nuts and bolts or dzus fasteners (no
screws)
J. No
glass of any type is permitted. Side windows may
have shatterproof Lexan, minimum of 1/16". Front
windshield must have 1/2" square mesh
windscreen, or a bar system with a maximum of a
2" opening. A 2" block cannot fit through the
opening.
K. No
listening or transmitting devices.
L. No
rearview mirror of any type.
17.
NUMBERS
A. All
cars must have numbers in five (5) location:
Numbers on right & left door and roof must be a
minimum of 12" high, and the width must be 2/3
of the height, except for the number #1. On the
roof, it should be as large as possible. The
number on the rear of the car must be a minimum
of 6", and located above the bumper so to be
viewed by the driver behind. The assigned
association letter must be a minimum of 6" high
on the roof and the doors and 2" high on the
rear of the car. A minimum 2" number and letter
must be displayed on the left front upper corner
of the windshield. All numbers must be permanent
(ie: vinyl or painted). All numbers should be
made to be as large and clear and plain as
possible to assist in scoring.
B. No
Roman numerals, or Gold leaf .
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