RETRO G7-68 RULES©
Effective January 1, 2017
CHASSIS: Are to be scratchbuilt from the
listed materials or kits. Allowed Materials are Brass in sheet, rod
and tube forms. Bronze rod for chassis main rails/rails.
Steel in piano/music wire, pin tube(s). Steel guide holders are allowed
but can not exceed a max width of
1" ( 25.4 mm ) and be no longer than 1 1/2" ( 38.1 mm ) in length. No
other materials allowed in chassis construction.
Chassis are to be inline drive type. Motor shaft
must be 90 degrees to the rear axle. No offset motors allowed. The motor shaft
is to be on the centerline of the chassis.
Floating pin tubes are allowed. Steel parts cut
from Flexi type chassis are not allowed.
Chassis must have a three sided and one
piece rear motor bracket with a minimum height of .200" in the
areas between the motor mount and bushing/bearing/tube areas .
Bracket width is open. No cut and soldered rear brackets allowed. The motor
must be supported by the bracket and the bracket extend to touch the rear
axle bushings/bearings/tube(s). The motor must be soldered or screwed
to the bracket.
Keyed or Snap type chassis construction is not
allowed. Chassis Main Rails of round steel wire or round brass
rod/tubing may be ground/sanded a maximum of 20% of the wire diameter and
must be ground/sanded on the bottom side of the wire and chassis only. No flat
or strip type rails allowed. Chassis Main Rails must connect the front of the
chassis to the rear motor bracket. No Pan type or one piece type chassis
allowed. The bottom surface of the chassis and motor must be straight and flat
in all directions ( front to rear and side to side ) with no sagging or
drooping or bowing parts below the chassis main rails. This will be checked
with a straight edge ruler.
All hinged movements must be oriented in one
and the same direction excluding the drop arm. Shaker pans are allowed.
Centerline hinges are not allowed.
Maximum chassis width is 3 1/8" ( 79.38 mm )
MOTOR: The only allowed motor for the G7-68 class is the Sealed Pro-Slot PS-4002-FK
All MOTORS MUST USE AN 8 TOOTH PINION. NO modifications to the motors or seals are
allowed. Racers may change brushes and springs. Only 3 coil replacement springs
are allowed and any 36-D sized motor brush may be used. Brushes may not be cut,
slotted or modified on the surface touching the commutator. No spring
insulation or shunt wires are allowed. NO OTHER MODIFICATIONS ALLOWED TO
BODY: Any Approved Can Am/WSC Coupe body may be
used. Bodies must be 1968 or earlier models based on the actual full sized cars
of that era. See Approved G7-68 body chart on Approved Body Listing
Page. Bodies may not be modified from their original molded factory form. Max
width of bodies and spoilers are 3 1/4". No excessive cutting allowed.
Front wheel wells must be cut out. Rear wheel wells are to be cut out unless
the real car was run with the rear wheels enclosed. Rear of body may be cut
out. Tape to reinforce bodies is allowed.
Bodies must have three numbers and be painted.
Bodies may have clear sides and no higher than 1/4" ( 6.35 mm
) measured from the bottom of the body when mounted on the car.
Windshields/windows must be clear or tinted as on the full size car. Must
not be able to see the chassis through the body and body must be opaque except
for the clear sides and windshield areas or any other area ( air vents
) that was open on the full size car. There is to be a minimum of
1/16" ( 1.59mm ) vertical front area ( grill, bumper ) on the front
of the body.
REAR BODY SKIRTS: There is no maximum limit
to rear body skirts behind the rear tires in Can-Am, World Sports Car (Coupe),
Retro Anglewinder, G7-68 and Formula One/Indy. No material of any kind may be
added on to the body to extend rear body skirts. All rear body skirts must
clear by .040 sitting on the tech block.
Front and Rear tires and/or chassis may not
be visible outside the body when looking down on the car/body.
Body interiors must be used. Must be formed and
3-D. No flat interiors allowed. Must be painted a minimum of two colors. Must
have driver, helmet, arms, shoulders and steering wheel molded in. The
cockpit area must be cut out on the mold lines of the body.
REAR BODY HEIGHT: Maximum of 1 3/8" ( 34.93
mm ) measured at the highest point of the body at the rear of the body.
Measurement does not include the rear spoiler.
REAR SPOILER: Max height is 1/2" ( 12.7 mm
). Spoiler must be attached to the rear of the body and not on the top of
the body. Rear spoiler can be no wider than the body. No additional air control
devices are allowed. No front diaplanes or side dams allowed. Notches and
"punched" holes are permitted. A maximum of two bends
allowed. High mounted wings are not permitted.
FRONTS: Minimum Diameter .750" ( 19.05 mm ).
Minimum Width .225" ( 5.72 mm ) No O-Ring fronts allowed. Must be
two pieces a wheel and a foam rubber tire. Foam rubber tire must be glued to
the front wheels. Front tire foam must be Black and made from natural, wonder
or SBR type rubber. No silicone material(s) allowed. Fronts may be coated with
"super glue" or finger nail polish. Contact patch must touch the
entire track surface. No angle cut or treading allowed. Tire edges may be
rounded 1/16" maximum radius.
REARS: Must be made using Natural Rubber tires
only. Fish/Tuna ( treated or untreated ) and Wonder rubber is allowed. No
Speed, silicone or synthetic rubber allowed. Maximum rear tire width is
.810" ( 20.57 mm ) and the minimum rear tire diameter is .790" (
20.64 mm ). Rear tires may not be angle cut. Rear tire/wheel width may be
WIDTH: Maximum width of chassis and front and
rear track is 3 1/8" ( 79.38 mm ). Axles may not be wider than 3 1/8"
and may not protrude outside the outer wheel edge. Front wheels are not
allowed to "extend" out past the sides of the body.
FRONT CLEARANCE: Minimum is .015"
( 0.38 mm ). Car/chassis is to be checked on a flat block with the
front and rear tires supporting the car/chassis without the guide and
the most forward part of the chassis will be measured for the minimum
.015" clearance. No tape or other materials are allowed anywhere on
the bottom of the chassis.
REAR CLEARANCE: Minimum is .040" ( 1.27 mm
). Car/chassis is to be checked on a flat block with the front and rear
tires supporting the car/chassis without the guide. The motor
bracket and all wires, pans, etc must clear by this measurement from the aft
side of the motor. The crown gear must also clear by .040".
AXLES: Minimum diameter of 3/32" ( 2.38 mm )
allowed front and rear. Axles must be solid steel and no hollow or lightweight
material axles allowed. Flattened axles are allowed. Threaded front axles
BEARINGS/BUSHINGS: Ball Bearings or oilite
bushings allowed on front and rear axles and in front wheels.
WEIGHT: Minimum ready to race car weight is 100
GEARS: 48 pitch commercially available pinions
and crown gears only. Must use 8 tooth pinion only and crown gears
are limited to 26, 27, 28 and 29. Gears may not be modified with the exception
of a sleeve only. No lightening of the plastic or metal gear hub. The plastic
portion of 29T crown gears may be sanded and/or machined to meet minimum
clearance requirements. No other modification of crown gears is permitted.
GUIDES: May use and commercially available guide
flag. May use any lead wire, guide clips and guide nut.
IF IT'S NOT MENTIONED IT'S NOT LEGAL ASK
before bringing it to the track or to tech
Content on this website is Registered with the U.S. Copyright Office TXu 1-860-089 March 27, 2013
and/or by the RETRO Retro ElecTric Racing Organization as it is updated.