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SANCTIONED CLASS
SPECIFICATIONS 2008
IMDRA sanctions 10 competition classes, categorized as nitro and electric.
The following specifications must be adhered to and any disputes and/or
questions involving these specifications shall be addressed to the Technical
Director or Race Director prior to the commencement of a race event.
VEHICLE CLASS SPECIFICATIONS AND GUIDELINES
General Guidelines: Safety will be observed at ALL times. These rules and
guidelines are set in place to provide for safe and competitive classes and
everyone an equal opportunity to compete. Racers are required to adhere to
all manufacturersmanufacturers
safety specifications.
All specifications are based on real car specs, as close to 1/10th scale as
practical.
All cars must be wheel driven. This means that the cars power must be
directed into the tires not thrust driven.
Absolutely
NO Propylene Oxide or Pure Nitro allowed on the premises. (Mixing fuel at the
track is not allowed)
Lithium Polymer (LiPo) and Lithium ion (Li-Ion) batteries
allowed in (transmitters,
and receivers,
in all classes) and as a power
source in all electric
classes , Except Super Gas. in
Extreme only.
A
red or yellow sticker must be placed on windshield or cowling of body to
identify vehicle as using Lithium batteries.
Any full bodied and or production type car having fender wells, must not
have a fender visually lower than the front or rear axle center axis. This
means that you MUST be able to see the front and rear axle on any
production type or full bodied car. No tires protruding above the bodyline
of the car. All cars must be painted, no clear bodies allowed to enter
competition. Wheelie bars are not part of the measured
chassis length.
All classes are .400 pro tree including bracket classes.
A class shall consist of at least four (4) cars. In the event that there
are not enough cars in a specific class, 2 similar classes will be combined
to make a full class. (Example): Top fuel funny car and Top fuel dragster
will combine if either class has less than the minimum required car field.
4 Car fields will not run a B-Side, must be 6 car fields in order to run a
B-Side.
Note: A record can only be set in the specific class that car was
originally entered in. If a record is set in a combined class then only the
record will pertain to the specific class that the car was intended to run
in NOT both classes of the combined entry. A National record can only
happen during qualifying or eliminations and only at a national event. All
records to be backed up within 1%.
IV. Class Specifications
Bracket Class
Any vehicle and motor combination allowed.
Must have working brakes
Drivers specify dial-in times
Pro-Tree .400 light
A
red or yellow sticker must be placed on windshield or cowling of body to
identify vehicle as using Lithium batteries.
/
Sponsored by Megatech
Any 1/10 or 1/8 scale vehicle. This will include any Megatech
vehicle, Monster truck, Import, on-road car or Buggy.
These cars will run on a 2.00 index.
A
red or yellow sticker must be placed on windshield or cowling of body to
identify vehicle as using Lithium batteries.
Electric Super Gas
Any full body coupe, roadster, sedan, or sports car body allowed. Must have
either a pro-style hood scoop or blower and hat. Rear spoilers and wings
allowed for roadsters but no higher than 5" from the ground to top of
wing) (all full bodied cars will not have a spoiler any higher than the
roof line of the vehicle.) (See Sportsman Motors)
18.5 maximum chassis length (6 minimum chassis length)
11 maximum wheelbase
8 minimum wheelbase
10 maximum vehicle width
2 inch diameter minimum front wheels/tires
6 sub C cell battery maximum NiCad or NiMH Cells only
36 oz. minimum weight
Any size rear wheels/tires
Any mass-produced and commonly available (through a hobby distributor)
ferrite magnet modified motor, allowed. Ball bearings, adjustable timing
and truing of the commutator are permitted. Internal modifications to the
motor can, armature and magnets are not allowed. Maximum motor can
dimensions are 2.5 inches in diameter and 3.5 inches in length (measured
from end bell to end bell)
Combined Electric Pro Mod and
Electric Top Fuel Funny Car
Electric Pro Mod
Only car and truck bodies allowed. Rear spoilers are allowed up to 2.5 inches
in length, with side dams up to 1 inch in height. Wing may be attached to
the rear trunk lid area. Note: All full bodied cars will not have a spoiler
any higher than the roof line of the vehicle. Must have hood scoop or
blower & injector hat assembly.
19 maximum chassis length (No minimum)
12 maximum wheelbase
8.5 minimum wheelbase
10 maximum vehicle width
1.5 inch minimum front wheels/tires
2 inch minimum rear wheels/tires
Any mass-produced and commonly available (through a hobby distributor)
cobalt or neo brushed or brushless motor allowed. Maximum motor
can dimensions are 2.5 inches in diameter and 3.5 inches in length
(measured from end bell to end bell)
Motor must be equipped with a quick disconnecting motor power device that
is clearly marked and accessible from outside the body.
10 cell battery maximum
NiCad or NiMh Sub C cells.
3 cell battery maximum lithium cells (11.1
volts)
40 oz. minimum weight
s
3 cell
battery maximum Lithium cells (11.1 Volts)
40 oz. minimum weight
A red or yellow sticker must be placed on
windshield or cowling of body to identify vehicle as using Lithium
batteries.
Electric FC
Any 1/10 scaled marketed body allowed. Body must retain features and shape
of original full sized car. Body can be-sectioned, sliced or wedged to keep
up with current Funny Car technologies.
Rear spoilers are allowed with no size limit and may be attached to the
rear trunk area. No elevated wings allowed.
22 maximum chassis length (No minimum)
14 maximum wheelbase
12 minimum wheelbase
1.5 inch minimum front wheels/tires
2 inch minimum rear wheels/tires
Any mass-produced and commonly available (through a hobby distributor)
cobalt or rare earth magnet based motor allowed (Brushless and brushed
allowed). Maximum motor can dimensions are 2.5 inches in diameter and 3.5
inches in length (measured from end bell to end bell)
Motor must be equipped with a quick disconnecting motor power device that
is clearly marked and accessible from outside the body.
10 cell battery maximum
NiCad or NiMh Sub C cells.
3 cell battery maximum lithium cells (11.1
volts)
40 oz. minimum weight
s
3 cell
battery maximum Lithium cells (11.1 Volts)
40 oz. minimum weight (weight might be adjusted during the 2007
season)
A
red or yellow sticker must be placed on windshield or cowling of body to
identify vehicle as using Lithium batteries.
Electric
Top Fuel Dragster
Any
1/10 scale
dragster body allowed. Body must be scaled in appearance.
9 maximum wing height measured from the highest point on the wing, including the side dams.
31 maximum chassis length
r
Any
1/10-scale dragster body allowed.
Body must be scaled in appearance.
9 10 maximum wing height measured from
the highest point on the wing, including side dams
31 maximum chassis length
15
minimum chassis length
30 maximum wheelbase
15 minimum wheelbase
10 maximum vehicle width
.375
inch (3/8) minimum front wheels/tires
2
inch minimum rear wheels/tires
40
oz. minimum weight
Any
mass-produced and commonly available (through a hobby distributor) cobalt
or rare earth magnet based motor allowed (Brushless and brushed
allowed). Maximum motor can
dimensions are 2.5 inches in diameter and 3.5 inches in length (measured from
end bell to end bell)
Motor
must be equipped with a quick disconnecting motor power device that is
clearly marked and accessible from outside the body.
10
cell battery maximum NiCad or NiMh
Sub C cells
3
cell battery maximum Lithium cells (11.1 Volts)
A
red or yellow sticker must be placed on windshield or cowling of body to
identify vehicle as using Lithium batteries.
NITRO CLASSES
Nitro P/S
Any 1/10 scale door slammer body allowed. Must have pro style hood scoop.
18.5 maximum chassis length
11 maximum wheelbase
8 minimum wheelbase
10 maximum vehicle width
2 inch diameter minimum front wheels/tires
36 oz. minimum weight with .12 or .15 sized (small block) engine
No .15 BB allowed
Must have operating throttle return spring, constructed either of steel orthandenta latex elasticl
quality rubber band. Exhaust must deflect upwards.
Top Alcohol FC and
Rail
Any 1/10-scale funny car style body or 1/10-scale Dragster style Body
Funny Cars: Rear spoilers are allowed with no size limit and may be
attached to the rear trunk area. No elevated wings allowed.
Dragsters: 10 maximum wing height measured from the highest point on the
wing, including side dams
Funny Cars: 34 oz minimum weight 14 maximum wheelbase
Rails: 38 oz minimum weight 30 maximum wheelbase
Engines > .12ci, .15ci
or .18ci
cubic inch sized engine Any Internal Modifications Allowed
Must have operating throttle return spring, constructed either of steel or
orthandenta latex lelastic quality rubber band.
Exhaust must deflect upwards
Combined
Nitro Pro Mod and Nitro Funny Car
Pro Mod
Only car and truck bodies allowed. Rear spoilers are allowed up to 2.5
inches in length, with side dams up to 1 inch in height. Wing may be
attached to the rear trunk lid area. Note: All full bodied cars will not
have a spoiler any higher than the roof line of the vehicle. Must have hood
scoop or blower & injector hat assembly.
19 maximum chassis length (No minimum)
12 maximum wheelbase
8.5 minimum wheelbase
10 maximum vehicle width
1.5 inch minimum front wheels/tires
2 inch minimum rear wheels/tires
40 oz. minimum weight
Up to a .21 cubic inch engine. Any Internal Modifications allowed.
Must have operating throttle return spring, constructed either of steel or orthandentallatex elastic
quality rubber band. Exhaust must deflect upwards.
Funny Car
Any 1/10 scaled
marketed body allowed. Body must retain features and shape of original full
sized car. Body can be-sectioned, sliced or wedged to keep up with current
Funny Car technologies.
Rear spoilers are
allowed with no size limit and may be attached to the rear trunk area. No
elevated wings allowed.
22 maximum chassis length (No minimum)
14 maximum wheelbase
12 minimum wheelbase
1.5 inch minimum front wheels/tires
2 inch minimum rear wheels/tires
40 oz. minimum weight
Up to a .21 cubic
inch engine. Any Internal Modifications allowed.
Must have operating
throttle return spring, constructed either of steel or latex elasticorthandental
quality rubber band. Exhaust must deflect upwards.
Nitro Top Fuel Dragster
Any 1/10-scale dragster style body allowed
10 maximum wing height measured from the highest point on the wing,
including side dams
3136
maximum chassis length
15 minimum chassis length
30 maximum wheelbase
15 minimum wheelbase
10 maximum vehicle width
.375 inch (3/8) minimum front wheels/tires
2 inch minimum rear wheels/tires
44 38 oz.
minimum weight with up to .21 cubic inch engine Any Internal Modifications
Allowed
Must have operating throttle return spring, constructed either of steel or latex elastic orthandental quality
rubber band. Exhaust must deflect upwards
EXTREME-UNLIMITED
Any 1/10 or 1/8 scale vehicle allowed
No motor limit.
Nitro vehicles must have operating throttle return spring, constructed
either of steel or latex
elasticorthandental quality rubber band.
Exhaust must deflect upwards
Lithium-Polymer and Lithium- Ion batteries allowed as a motor power source.
A red or yellow sticker must be placed on windshield or cowling of body to
identify vehicle as using Lithium-Polymer
or Lithium-Ion batteries.
Quarter Scale Specifications
The Quarter Scale class
competition will be contested on 132 feet, on a .400 pro tree and will
operate as an Outlaw class within the specifications provided.
General Rules:
Safety:
1.
At
least one dry chemical fire extinguisher must be located within the pit
area.
2.
Radios
must be FCC approved ground systems. Fail safe feature recommended.
3.
Engine
kill switch mandatory. Must be clearly marked and accessible from outside
the vehicle.
4.
Brakes:
All cars must have an effective braking system.
5.
All
cars must use a centrifugal clutch.
6.
Radio
receiver and battery must be securely mounted.
7.
Fuel
system must be secure and away from heat and moving parts.
8.
A
throttle return spring must be attached at the carburetor.
Engine:
1.
Will
be limited to one single cylinder 2 stroke, 2 cycle, ignition type engine.
Any modifications accepted. Limited to a maximum of 55 ccs. No glow
engines allowed.
2.
Exhaust:
Mufflers or tuned pipes accepted. Must direct exhaust away from the track
surface and configured to fit within the width and length of the vehicle.
3.
Carburetor
modifications accepted. Velocity stacks and air filters accepted.
4.
Pump
gas or race fuel permitted. No alcohol, nitro, N.O.S. or propylene oxide
allowed.
Body and Chassis:
Chassis may be constructed as pan or tube type.
Suspension is optional. Cars may
utilize the recommended Top Fuel, Funny Car or Pro Stock template
provided, but are not limited to such. However, vehicles must bare a strong
resemblance to a drag racing vehicle. (i.e. Gasser, Altered, etc.)
1.
Pro
Stock
a.
Full
bodied car or truck. Hood scoop is mandatory.
b.
Rear
spoiler required. Must be to scale and no wider than the rear of the
vehicle.
c.
Wheelbase:
24 to 26 (recommended)
d.
Wheelie
bars permitted.
e.
Tires
must fit within the body. Any compound accepted. Maximum width 4, minimum
height 6, maximum height 9.
2.
Funny
Car
a.
Body
must be of Funny Car origin.
b.
Rear
spoiler or spill plates required, must be to scale and no wider than the rear of the body.
c.
Wheelbase:
25 to 31 (recommended)
d.
Wheelie
bars permitted.
e.
Tires
must fit within the body. Any compound accepted. Maximum width 4, minimum
height 7, maximum height 9
3.
Top
Fuel
a.
Must
resemble a Top Fuel Dragster.
b.
Rear
wing required
c.
Wheelbase:
70 to 75 (recommended)
d.
Wheelie
bars permitted.
e.
Rear
tires: Any compound accepted. Maximum width 5, minimum height 7, maximum
height 10
JUDGING OF CONCOURS:
The
objective of the concours is to be as realistic in design and scaled as
close as possible to a real looking car. We would like to acknowledge and
honor an enthusiast who has put forth the extra effort and has shown that
their hard work not only looks good but works great as well. Detail will be
looked at along with realism and originality. Any type car may enter.
This car MUST be entered into a class and running to participate in the
concours. The car must be drivable and functioning. It will have had made a
pass down the track at some point during the event to qualify for concours. (Actual entry into
a class) NOT PRACTICE. (A car can only WIN once in Concours competition per
body)
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