2015 Road Proposed Classes

1/24 D3/Retro GTP                            PROPOSED ROAD RACE CLASS

Spirit of the Class   1965-1973 Le Mans Prototypes

Chassis:  May be any 1:24 “D3” personally-built or commercially-available scratch built kit style chassis with an ”in-line” motor configuration built to these specifications. Chassis may be constructed of brass: sheet, rod, and tube; steel: wire, pin tubing, and commercial guide tongues. No other materials are allowed. Precut parts including but not limited to pans, brackets, guide tongues must be individually commercially available, Chassis must have a one-piece brass rear bracket consisting of at least three sides (vertical or horizontal), with each connected side having a minimum width or height of at least .200" and the motor bracket must support the motor and extend to touch the rear axle tube. The axle tube does not need to travel through the motor bracket.  The motor can be screwed or soldered in place. Floating pin tubes inside another tube are allowed.

Pieces of steel used for guide tongues are limited to a maximum 1” (25.4mm) total width and 1.50” (38.1mm) total length. Steel tongues cut from the flexi and wing car chassis are not considered "commercial guide tongues" and are not allowed. All legal steel tongues must be purpose built as steel tongues and meet measurement specifications. The joining of brass sheet, plate, or strip parts via tab and slot or "keyed" construction is not permitted.  Main chassis rails constructed of round steel or brass wire maybe ground or sanded flat on rail diameter may be removed. Wire or tubing rails must connect the front and rear sections of the chassis. Using metal strip for this purpose is not permitted. A rail is defined as that which connects the motor bracket to the front of the chassis. The bottom surface of the whole chassis (including the motor, but excluding the motor seal and guide flag) must be flat and straight in all directions, with no bowing or drooping of any parts below the plane defined by the front and rear clearance specifications. This will be checked by applying a straight edge to the underside of the car both across the frame and along the length of the frame. The entire car must clear the 1:24 ground clearance minimum of 1/16” (.0625”).

Other than a drop arm, all hinged movements must be parallel and oriented in only one direction on any individual chassis. A chassis may have transverse hinges (examples: Iso-fulcrum hinges and plumber hinges) OR it may have longitudinal hinges (example: side pan hinges) but the chassis may not have both types. The number of individual hinges is not restricted. Centerline hinges are NOT ALLOWED.

Any single front or rear axle may be used, the front axle must carry both front wheels and may rotate independently. The axle may be fixed or in a tube. NO hinged front wheel movements are allowed (i.e. no “L” arms).

Chassis must be covered completely by the body when viewed from directly above with the exception of no more than half the guide flag may protrude.  Minor trimming of the chassis may be done only to allow body clearance.  Pin tubes may be added for body mounting. 

Wheels / Tires / Axles:  All tires must be black or very dark as to appear black.  Front wheels / tires may be of the “o-ring” type with no minimum width.   Axles may be 3/32 or 1/8”.  Rear tires may be foam, silicone or similar.  Maximum overall width to outside of wheels and tires is 3 1/8” (3.125”).

Motors:  Any Falcon or Hawk 7.

Gears:  Any pitch and any size pinion or spur may be used resulting in any gear ratio. Ground clearance rules apply.

General:  Minimum ground clearance is 1/16” (.0625”) except for wheels and tires and guide flag.  Note that this includes the gears and any weight that may have been added on the bottom of the chassis.  Maximum overall width of chassis, including outside of wheels and tires may not exceed 3 1/8” (3.125”).

Track Power:  This class will be run on Low Power as defined by the MGPMRC rules.

Body: Vacuformed representation of the closed cockpit cars raced in the premier GT class at LeMans from 1965 thru 1973. Known available bodies include: Chaparral 2F, Ferrari 330 P4, Lola T70C, Ford GT40, Ford Mk IV, Mirage M1-C, Porsche 917, Porsche 917 Short Tail, Porsche 917 Long Tail. Any body with exaggerated tail/wing/spoiler must provide photo proof that it was run in that configuration. 

Special Class Rules / Specifications:  Maximum body width is 3.250” (82.55mm), measured at the widest point on the body.

Tech Inspection The determination of technical qualification for the event rests upon the discretion of the Technical Director. Either pre-race or at the conclusion of a race, if the results are challenged or at the discretion of the Technical Director, any car may be given a thorough breakdown inspection with the body removed.  At that time the car may be disqualified at the determination of the Technical Director resulting in the removal of that car and driver from all points scoring positions for that race or a 1 race exemption may be allowed.

B production Modern LeMans Road Racing Spring, 2015

Chassis: May be any of the stamped, commercially available 1/32 scale, 1 - 3 piece chassis with no modifications allowed other than those specified here.

Weight may be added in the form of lead or ballast. The weight may not be in the form of brass, piano wire or some other structural material intended to enhance the original chassis. The front or rear axle mounts, the motor or the pickup mount may all be soldered, braced or strengthened if desired. Guide flag depth may be reduced to obtain proper depth but never extended to increase depth.

Chassis must be covered completely by the body when viewed from directly above. Minor trimming of the chassis may be done only to allow body clearance. Pin tubes may be added for body mounting.

Axles: Front and Rear: Open. Axle bushings may be soldered or glued in place.

Wheels / Tires: Front tires are usually o-rings or larger (no pictures or non-functioning rubber). Rear wheels and tires are usually of the set screw variety. Foam or silicone.

Motors: Any Falcon up to 7 or Hawk 7. The motor may not be modified in any way and must be left as manufactured.

Gears: Gears may be of any ratio and pitch and may be composed of plastic or metal. Gears are subject to ground clearance restrictions.

General: Minimum ground clearance is .047 except for wheels and tires and guide flag. Note that this includes the gears. Maximum overall width of chassis, including outside of wheels and tires is 2.52".

Track Power: This class will be run on Low Power as defined by the MGPMRC rules.

Tech Inspection: The determination of technical qualification for the event rests upon the discretion of the Technical Director. Either pre-race or at the conclusion of a race, if the results are challenged or at the discretion of the Technical Director, any car may be given a thorough breakdown inspection with the body removed. At that time the car may be disqualified at the determination of the Technical Director resulting in the removal of that car and driver from all points scoring positions for that race.

Spirit of the Class 

 Modern LeMans 

Body Material:

Lexan vacuformed

C Production IMSA GT WOMP

Spirit of the Class  1980’s IMSA GT series that ran during the 1980s

Chassis: Must be either the Parma Womp (brass or steel) or Champion Thumper. No modifications allowed other than those specified here.

Weight may be added in the form of lead or ballast. The weight may not be in the form of brass, piano wire or some other structural material intended to enhance the original chassis. The front or rear axle mounts, the motor mount or the pickup mount may all be soldered, braced or strengthened if desired.  Oilite bushings only are allowed at the rear. Front wheels may be set to be free-wheeling. Axle bushings may be soldered or glued in place. Guide flag depth may be reduced to obtain proper depth but never extended to increase depth. Chassis must be completely covered by the body when viewed from directly above. Minor trimming of the chassis may be done only to allow body clearance. Pin tubes may be added for body mounting.

Wheels / Tires:  Any tires may be used so long as ground clearance/ max width requirements are met.

Motors: 16D: Death Star or less.

Gears: Gears may be of any ratio and pitch and may be composed of plastic or metal. Gears are subject to ground clearance restriction

General: Minimum ground clearance is .047 except for wheels and tires and guide flag. Note that this includes the gears. Maximum overall width of chassis is 2.5”.  Maximum width from outside to outside of wheels and tires is 2.85”.

Track Power: This class will be run on Low Power as defined by the MGPMRC rules.

Body:  Interior with three dimensional driver must be installed. Example bodies can be found at http://slotcarhotrod.com/Outisight.html

Special Class Rules / Specifications; None

Tech Inspection:  The determination of technical qualification for the event rests upon the discretion of the Technical Director. Either pre-race or at the conclusion of a race, if the results are challenged or at the discretion of the Technical Director, any car may be given a thorough breakdown inspection with the body removed.  At that time the car may be disqualified at the determination of the Technical Director resulting in the removal of that car and driver from all points scoring positions for that race or a 1 race exemption allowed