Source: Site de l'IFMAR:

12 / 2003









5. TECHNICAL SPECIFICATIONS  1/10 235mm (including IFMAR 235mm Bodyshell List)

5. TECHNICAL SPECIFICATIONS  1/10 200mm (updated Dec. 2003)


(To be read in conjunction with Section 1. GENERAL Rules for IFMAR World Championships)




There will be an IFMAR World Championship for both classes.  The two World Championships will consist of a maximum of 148 competitors combined, 74 competitors for 4WD 235mm class and 74 competitors for 200mm Nitro Touring Car class.  If all 74 places are not filled in one class, the remaining unused places in that class become available for the other class.    A driver may enter both classes or only one class.

2.1       SCHEDULE

            The two events will be run concurrently over a period of eight (8) to ten (10) days.


Free practice will start on Thursday. The track will open for a minimum of a total of twenty one (21) hours for free practice over Thursday, Friday and Saturday.  The Organiser may optionally allow competitors to practise before Thursday or at extended hours.  Free practice schedule will not normally be changed but may be if, because of unforeseen circumstances, the Team Managers' Committee votes to do so with approval from the International Jury.


 Sunday from 08.00 to 18.00 and Monday from 08.00 to 18.00. Final deadline for registration: Monday 18.00. IFMAR may authorise later registration at its discretion. When registration of drivers is carried out, each driver will sign a form  which states that he accepts, and will abide by, the published rules of the event.


2.4.1   Any drivers' briefings are to be held at the Organiser's discretion when all drivers must attend.

2.4.2   A Team Managers' Meeting before the start of the first round of qualifying heats is compulsory. All Team Managers must attend.

2.4.3   Further Team Managers' Meetings are recommended but are called at the Organiser's discretion.


Will be on Sunday and Monday from 08.00 until 18.30. Drivers or mechanics have to present their cars with bodies, empty tanks, a bottle of fuel and transmitters.


All drivers will have the chance to participate in frequency controlled practice on Sunday. There will be a timed practice for drivers in their published heats on Monday, ten (10) minute practice heats beginning at 08.30.


An opening ceremony will take place on Monday at 18.30. Competitors will participate in a welcoming procession.  Each national team is asked to wear similar shirts.  A flag and sign bearing the name of each country will be provided by the organiser for each team.  At the Opening Ceremony a Concours d’Elegance will be held in two (2) categories for each class.  First category will be the best “paint job”.  Second category will be the best 1/10th scale replica.  There will be one (1) trophy for each category.


2.8.1   There will be six (6) qualifying rounds of ten (10) minutes for each entrant’s car, the best number of laps and time of finishing lap, counting for best result.  The entrants will be divided into two (2) groups:  Group A will consist of the 235mm class, heats 1 to 8.  Group B will consist of the 200mm class, heats 9 to 16.  Six (6) rounds of qualifying heats will be run as follows:

             Tuesday:  Rounds 1 and 2 – Group A

                                                                                    Round One       Round Two

                                                            Heat 1              9.00                  11.00

                                                            Heat 2              9.15                  11.15

                                                            Heat 3              9.30                  11.30

                                                            Heat 4              9.45                  11.45

                                                            Heat 5              10.00                12.00

                                                            Heat 6              10.15                12.15

                                                            Heat 7              10.30                12.30

                                                            Heat 8              10.45                12.45   

             Group B                                Heat 9              13.45                15.45

                                                            Heat 10            14.00                16.00

                                                            Heat 11            14.15                16.15

                                                            Heat 12            14.30                16.30

                                                            Heat 13            14.45                16.45

                                                            Heat 14            15.00                17.00

                                                            Heat 15            15.15                17.15

                                                            Heat 16            15.30                17.30

            After round two (2) of qualifying heats, drivers will be re-seeded within their group for remaining rounds of heats.

            After re-seeding:

             Wednesday:  Rounds 3 and 4                                                                                        

            Group B starts at 9.00

            Group A starts at 13.45             

             Thursday:  Rounds 5 and 6

             Group A starts at 9.30               heats 1 to 8

            Group B starts at 11.30              heats 9 to 16

            Group A starts at 13.30              heats 8 to 1

            Group B starts at 15.30              heats 15 to 8

            This schedule assumes a total of 144 drivers.  For less or more drivers in each class there

would be equivalent heats.

2.8.2     The top four (4) qualifiers in the 235mm class go straight to the 235mm Main Final.

            The top four (4) qualifiers in the 200mm class go straight to the 200mm Main Final.

2.9       FINALS

             All sub-finals and final consist of ten (10) drivers.  “Christmas Tree” System for 74 entries in each class:

            1/32      final even numbers   74 – 62      odd numbers  73 – 61 *

            1/16      final even numbers   60 – 48      odd numbers  59 – 47 *

            1/8        final even numbers  46 – 34       odd numbers  45 -  33 *

            1/4        final even numbers 32 – 20        odd numbers  31 – 19 *

            1/2        final even numbers 18 -  6          odd numbers  17 –  5 **

             *    First three (3) go forward.  Duration twenty (20) minutes.

            ** First two (2) go to final; then the next two fastest from either semi-final go to final.  Duration thirty (20) minutes.

The car numbers for the six (6) drivers who moved up from the semi-finals is based on the results achieved out of both semi-finals, taking into account the laps and times only.            

             Friday:  Lower finals from 1/32 to 1/8 for each class to be run over twenty (20) minutes.

             1/32      235mm             Even starts at    8.00      Odd starts at   8.30

            1/32      200mm             Even starts at    9.00      Odd starts at   9.30

            1/16      235mm             Even  starts at 10.00      Odd starts at 10.30

            1/16      200mm             Even starts at 11.00       Odd starts at 11.30

             Lunch break from 12.00 to 13.30

             1/8        235mm             Even starts at 13.30       Odd starts at 14.00

            1/8        200mm             Even starts at 14.30       Odd starts at 15.00

            1/4        235mm             Even starts at 15.30       Odd starts at 16.00

            1/4        200mm             Even starts at 16.30       Odd starts at 17.00

             Saturday:  1/2 finals to be run over twenty (20) minutes.

             1/2        235mm             Even starts at 9.00         Odd starts at 9.30

            1/2        200mm             Even starts at 10.00       Odd starts at 10.30

             Practice for direct qualified finalists from both classes to be run separately:

                         235mm          10.30 to 11.00

                         200mm          11.00 to 11.30

             Lunch break from 11.30 to 12.00


                         235mm          2.00                Drivers’ presentation to the public

                                                12.15                Warm-up Practice

                                                12.28                Trial start

                                                12.30                Start

                                                13.30                End of Race

                                                13.40                Unofficial publication of result

                                                14.00                End of protest time

                                                14.10                Prize ceremony on the track

                         200mm          15.00                Drivers’ presentation to the public

                                                15.15                Warm-up Practice

                                                15.28                Trial start

                                                15.30                Start

                                                16.30                End of the race

                                                16.40                Unofficial publication of result

                                                17.00                End of protest time

                                                17.10                Prize ceremony on the track

Sunday: To be used as spare day to allow for any delay in schedule.  Banquet and Awards' presentation to be held on Sunday night. At the conclusion of the Banquet and Awards' presentation, Team Managers will be given a result folder showing the qualification results and the final positions for both classes, as a closing report.


             The Race Director will stop the racing if it rains. If there are delays due to weather, re-arrangements will be made as  follows:


2.10.1  In case of the interruption of a heat, the entire heat will be re-run.

2.10.2  In the event of rain, the track must return to 100% dry conditions before racing can re-commence. The 100% dry conditions will be determined by a majority decision of the International Jury.

2.10.3  If a round of heats is started, it must be completed under the same conditions. If a round is halted due to rain or unforeseen circumstances and cannot be completed, this round will not be counted until the remaining heats in the round can be completed.

2.10.4  If weather and time permit and there is no time restriction on track use, every endeavour should be made by the Race Director to run as many of the maximum six (6) rounds of heats as possible.

2.10.5  A minimum of two (2) of the total of six (6) rounds must be completed.


2.10.6  In the event of rain during the 1/4 finals, if 50% of the race has been run before the rain, the race is declared. If rain falls before 50% of the race has been run, the results will be kept from the moment of stopping which will be the previous lap when the leading car crosses the finishing line. The new start will be given for the time which remains to complete the final. The two results will be added to give the final and definite placings. If the second start cannot be given for any reason, the results from the first part will be used as the final and definite placings.

2.10.7   In the semi-finals, if 75% of the race has been run before rain commences, the race is declared. If rain falls in the first 25% of the race, a total re-run will take place. If rain falls between the 25% and 75% mark, the total of the two (2) combined legs will be added together.

2.10.8   In the event of a semi-final being interrupted in this way, the top three (3) from each semi-final will advance to the final.

2.10.9   In the event of rain falling before the 25% mark where a complete re-start is required, drivers will be allowed to undertake maintenance on their cars.


2.10.10 If 75% of a main final has been run before rain commences, the race is declared. In the event of a main final being interrupted by rain where the two results will be added together (i.e. after the 25% mark), drivers may make repairs, re-fuel and change tyres before the re-commencement of that main final.



During registration, every driver will be given an envelope which includes; A detailed schedule including starting times of each heat, 3 sets of numbers for the car (the number on each decal to measure not less than 50.00mm/1.96 in. high x 30.00mm/1.18 in wide with a stroke of 8.00mm/.314 in., 3 sets of numbers for the wing, l number for the transmitter, l badge for the driver, l badge for the mechanic and l badge for the country's Team Manager will be issued.  Also included in the package there must be a sketch showing the correct positioning of the car numbers on the bodyshell.


Cars will be numbered 1 to 10 in each heat.

Each car must have 3 numbers: -  one on the front, one on the right side, one on the left side. These numbers will change during the qualifying heats (after re-seeding).

The organiser will provide other numbers for altered heats and for sub-finals and final.

Number decals may not be trimmed to eliminate the background.


The registration number (1-74, with number 1 being the reigning world champion) is put on the body/wing. It is the same for the entire competition. 

The numbers provided by the organiser must be attached to the right side of the body/wing, the other side being reserved for the competitor's national flag.  Every competitor must have his national flag on the left side of the body/wing of his car (when looking from the rear).


Every transmitter will have the competitor's number on it.  (The same number as on the wing).

2.12     BADGES


Two badges will be given to each competitor, blue for the driver, yellow for the mechanic. The designated Team Manager from each country will receive an orange badge upon registration of his drivers (see Rule 4.23).


            Orange badges/team managers - pits, staging area, special viewing area.

            Blue badges/drivers - drivers' stand, pits, staging area.

            Yellow badges/mechanics - pits, staging area.

            Green badges/Press - pits, staging area, special viewing area.

            Red badges/race officials - all areas.

            Grey badges/IFMAR officials - all areas.

2.13     PITS

Places are allocated for the duration of the World Championship. Places are grouped by country and marked by sign plates. Pits are covered. Every competitor will have a 60 x 120    cm (2 x 4 feet) table space.

Pits are equipped with either; 120 V/60 or 220 V/50 AC. Limited quantity of transformers will be available, 12 V DC (limited) in starting area.



Transmitter impound will start on Tuesday. All transmitters must be placed in impound upon arrival at the track. Transmitters will be furnished to each competitor after completion of technical inspection and prior to their heat. All transmitters must be returned to impound following their heat. Transmitters in the pit area, or areas other than the drivers' stand and impound, during official competition hours, will cause disqualification.


All transmitters must be tested and inspected prior to their use. A spectrum analyser will be used for radio inspection.  All transmitters passing inspection will be identified and only   these transmitters, thus identified, may be used in the event.


Automatic lap counting, with cumulative and split lap times, will be in place for each car.   Competitors are required to install a small transponder into their cars according to the organiser's instructions. An audio/video tape recording will be made.

Every competitor is also allowed to use his own IFMAR approved personal transponder if the lap counting officials are informed and agree.

If an organiser is using a personal transponder system, he has to provide to all participants, not having their own transponder, a transponder for every heat or final free of charge.  It is strictly forbidden to ask for a rental fee.  A deposit of the replacement value for the personal transponder may be demanded.  If a competitor for any reason destroys or does not return a personal or normal transponder, he loses his deposit.

The driver has to ensure that his personal private transponder belongs to the marked chassis.

Significant stops (refuelling, tyre changes, crashes, etc.) will be noted with times of stop and restart.  This record might not include every incident, however, its intent is to verify incidents, whenever possible.

AMB lap counting system or IFMAR approved equivalent must be used in duplicate. A    suitable working computer with proper race proven programmes must be provided to sort lap times, print results from heats and sort final positions from each round of heats within l5 minutes of the completion of the round of heats. Chronometers must give time to 1/100th of a second, in all cases, the hundreds will be utilised. In the case of equal results, the following best heat will separate the competitors. If both the primary and support lap counting systems fail during a qualifying heat or final, the heat or final will be re-run as soon as is practicable. Under no circumstances will any lap score or time, other than those from the official time keeping equipment, be accepted for any purpose to do with the running of an IFMAR race.


The display of the positions in a specific heat or final will be done in the pits and in the Team Managers'/Press stand. At the end of each heat (every l5 minutes) or of the finals, a copy of each competitor's lap sheet will be available for checking and information. Copies of the time-lap sheets of all cars of the heat or the final will be displayed with the result. At the end of each round, results of the general classification will be available.



3.1       SURFACE

Track surface should be unsealed asphalt or coarse finished concrete with smooth joints, if any.

3.2       LENGTH

The minimum length is 200 metres/656 feet.  Advised is 240-300 metres/787 - 984 feet.

3.3       WIDTH

The minimum width of the track is 4.5 metres/l5 feet between marking lines. The maximum width is 6.5 metres/ 2l feet. The marking lines must be 8-10 centimetres/3-4 inches wide.

3.4       PODIUM

Maximum distance from the middle of the drivers' podium to the furthest point of the track is 60 metres/l97 feet. Minimum height of the drivers' podium is 2.5 metres/8 feet from track level and the podium is at least l0 metres/33 feet long.

3.5       VISION

No obstacles may interrupt the vision from the drivers' podium to all parts of the track.

3.6       MARKING

A broken line may be painted in the middle of the straight to increase the vision.

3.7       PITS

The refuelling and pit area should be clearly distinct and separated from the main track and as close as possible to the drivers' podium. Exit from and entrance to the main track is advised to be on a slow section of the track.

3.8       DESIGN

Track design must include both right and left turns and must have a straight of minimum 60 metres/l64 feet.


Outside barriers must provide positive means of stopping a car when missing a corner or out of driver's control.  The consideration at selection of the outside barriers shall be the protection of the spectators and not the cars, although, if both can be obtained, it is ideal. The   outside barriers must be at least 40 centimetres/l6 inches away from the marking lines of the track.


Inside barriers must avoid short-cutting of corners or cars getting on other parts of the track. Inside barriers must be positioned and dimensioned to avoid cars flying over the outside barriers into the public. Inside barriers must be smooth and must be 20 centimetres/8 inches away from the marking lines on the track.

3.11     DOTS

No dots will be used on high speed sections.


The inner and outer surroundings of the track must have grass or other suitable materials, such as concrete. The object of these surroundings is to slow down the car that leaves the track. The car must be able to leave the infield or outfield on its own to minimise marshal assistance.


Marshal posts must be available for every 30 meters/100 feet of the track length.  They may not obstruct the vision of the drivers. The posts must be numbered.  When a post is located on dangerous part of the track (i.e. the straight or a fast corner), this post must then provide protection for the marshal (wall, tyres, gate, etc.).


A starting line must be painted across the track, preferably in front of the time keeping. The vision of the starting line may not be obstructed by the mechanics holding the cars or by the starter and starting equipment. The starting line must be located more than 10.00 metres/33.00 feet away from the first corner. Ten numbered boxes of 70.00-100.00 centimetres/27.00-40.00 inches long are painted with the starting line forming the front of all the boxes. The hold line for the mechanics is located 1.00 metre/3.30 feet behind the boxes.

3.15     LE MANS START

For the "Le Mans" type starts, ten (10) numbered boxes are located on the side of the track at an angle of 20-45 degrees with the track, at a minimum of 2.00 metres/7.00 feet and maximum 4.00 metres/14.00 feet apart. The boxes must measure 70.00-100.00 centimetres/27.00-40.00 inches long and 30.00-40.00 centimetres/12.00-16.00 inches wide.




Mechanic must be positioned under his driver's position. During finals, positions will be selected by drivers in order of qualifying position, i.e. No. l qualifier has first choice, No. 2 qualifier has second choice, etc.  During qualifying heats, only one (1) mechanic is allowed.

During finals, two (2) mechanics are allowed per car.  The use of all electronic communication devices between drivers and mechanics is banned during heats and finals.


            HEATS -

4.2.1   There must be a five (5) minute gap between the end of one heat and the start of the next. Also a minimum of three (3) minutes must be allowed between the issuance of the transmitters and the start of the heat.

4.2.2   An audible warning will be given in English language at one (1) minute and at thirty (30) seconds.

4.2.3   A staggered start timing system will be used during qualifying.  The cars will leave the starting boxes after the starting signal in the following order:


                                                ROUND 1:      1 2 3 4 5 6 7 8 9 10

                                                ROUND 2:      3 4 5 6 7 8 9 10 1 2

                                                ROUND 3:      5 6 7 8 9 10 1 2 3 4

                                                ROUND 4:      7 8 9 10 1 2 3 4 5 6

                                                ROUND 5:      9 10 1 2 3 4 5 6 7 8

                                                ROUND 6:      10 9 8 7 6 5 4 3 2 1

Each individual official time will start when the car passes the timing system for the first time. 

            When the first car completes the first lap, all official timing not yet activated will be started.


4.2.4     An audible warning will be given in English language at one (1) minute and at thirty (30) seconds. 

4.2.5   From thirty (30) seconds until three (3) seconds the cars may be placed in the starting boxes. If a car is not in the starting box at the three (3) second mark, it must start from the pitlane after all cars have started officially.

4.2.6   From ten (10) seconds until three (3) seconds, time is counted down in English language,   second by second.

4.2.7   At five (5) seconds, the starter will lower the starting flag and at three (3) seconds, the flag will be down, touching the ground. At this time, cars must be released by the mechanics who will all step back behind the hold line. The cars must remain in the boxes, no part of the car touching the starting line.

4.2.8   From 3 seconds, the counting stops and the start signal will be given by the starter between 0 and 5 seconds. If the grid is not to the satisfaction of the starter, he may command a re-start, beginning count down from 30 seconds.

4.2.9   The official starting signal will be audible by means of a horn operated by the starter. This signal will also start the timing systems.

4.2.10   Early starts - ALL FINALS ONLY.

Early starts, i.e. any car touching or crossing the starting line, will be penalised with a stop and go penalty.  The duration of this stop and go penalty has a to be determined at the Team Managers’ Meeting and depends on the lap times.  This penalty is issued by the starting official or the time-keeping official and has to be announced immediately after the start. The penalty will be marked on the result sheet.

4.2.11   Under no circumstances will the race be stopped due to a jumped start.

4.2.12   Only the Race Director may interrupt the race and order a restart in the event that he considers the starting procedures or the start were not carried out correctly.

4.2.13   DELAYED START - As long as the starter has not called the cars to the starting line, every participant of the semi- finals and the final may request a delay of ten (10) minutes for repairs on his car. The delay will be granted only once for each semi-final and final. The track shall be closed to all cars during the delay period.  The driver requesting the delay for whatever reason, except an error in frequencies by Race Control, must start from the back of the grid, six (6) metres/19.68 feet behind the last official grid position.


Marshals will be provided for all racing.  No other person is allowed on the track when racing is in progress.  If a car stops on the track, it will be returned to the pit area by a marshal.  A penalty will be given for any violation of this rule.  All marshals must wear closed shoes.


Only vehicles which conform to all regulations will be accepted for racing.  Technical inspection will be done on Sunday and Monday.  The cars will be examined and, if the car conforms to the rules, the chassis will be marked. At any time, the Race Director may ask the competitors to present their cars to the Technical Inspector. Random inspection will occur on the start line for numbers, tyres, wings and chassis.

No race will be delayed because of non-compliance by a competitor.  At the completion of each heat all cars in that heat, whether they finished or not, must be presented for technical inspection.  Cars which are not presented for technical inspection at the end of a heat will be disqualified from that heat.  Any race damage will be taken into account. At the end of finals, all cars will be impounded and may be inspected for engine size, fuel tank capacity, etc. Any infringement concerning engine, fuel tank and weight will cause disqualification from a driver's best existing qualifying heat or a final.  For the first infringement, the disqualified driver’s position will be shown as the last position in that heat or final.

A second infringement concerning any one of engine, fuel tank or weight, will cause total and immediate disqualification from the entire event. The disqualified driver will be placed on the last position of the final qualifying results and/or the last position of the final positions’ results and he will be noted as a disqualification.  Any infringement, other than those concerning engine, fuel tank and weight, will cause disqualification from that heat or final and the disqualified driver’s position will be shown as the last position in that heat or final. All cars must be fitted with a clutch, a braking system and an exhaust pipe that conforms to the rules.

The engine and fuel tank may be checked at any time. The volume of the fuel tank will include all fuel piping and filters up to the carburettor. Following method of measurement will be used:

- pinch off pressure lines, - fill the fuel tank completely, - remove fuel pipe from the carburettor inlet, - connect a calibrated syringe to the fuel line which has  been disconnected from the carburettor and pull all the fuel into the syringe. The amount of fuel removed by the syringe will be considered as the total content of the fuel system.

4.4.1   Only one car per driver will be accepted.

4.4.2   The chassis plate of each car will be marked with the competitor's number.

4.4.3   Only one chassis may be used for all qualifying heats and finals. The only exception to this rule will be in the case of a broken or bent chassis which may be changed with the Race Director's approval.  The new chassis must be presented to technical           inspection for marking before re-building the car.


In the case of two drivers using the same frequency and qualifying for the same final, the higher placed driver may keep his frequency and the lower placed driver must change. The time allowed for frequency change will be ten (10) minutes. The lower placed driver who cannot or will not change his frequency may not take part in the final for which he qualified. If a driver must change his frequency before the start of a semi-final or a final, due to an organiser's error, he will be allowed (ten) 10 minutes. If a driver finds his radio defective or has made an error in the selection of his frequency at the start of a final, the race will not be delayed. For the entire duration of the event, the frequencies in use by all drivers will be known only by the Race Director and each individual driver. All frequency changes must be authorised by the Race Director before the change is made. The organiser shall not display any driver's transmitter frequency on any heat sheets, result sheet or race schedule to preserve the security  of the frequency control systems. Each driver in the main final shall be permitted to change his frequency before the start of the race. Only the Race Director is permitted to know the frequency used by the main finalists.


Only the numbers supplied by the organiser will be used on the cars. Each participant is responsible for attaching the lap counting transponder to his car.  During qualifying, any car     starting without a lap counting transponder will not be counted. If a lap counting transponder     fails or falls off during the heats, the vehicle will be timed and counted manually, if possible. In this case, the Race Director will verify the results and his decision will be final. During the final, any car without a lap counting transponder will be counted manually by a manual back-up system. Under no circumstances will a heat or a final be re-run due to a car not having a      lap counting transponder or failure of the same. This also applies to a car not having the correct numbers and placement of these numbers.

4.7       FLAGS

            Start -               green flag or national flag.

            Finish -             chequered flag for final only.

            Blue  -              The car which is blue flagged must allow the car behind him to pass.

            Yellow -           Danger on the track - slow down.

            Black & white -            Official warning to the car which is flagged (diagonal).

            Black -             The car in question must stop immediately in the pits.

            Green -             Track open.

            Red -                Track closed. All cars must stop immediately.

The black and white diagonal and the blue flags are recommended but are not compulsory. All flags are under the direction of the Race Director who can delegate and authorise their use.



            Drivers who impede the progress of other participants

            Unsportsmanlike racing.

            Participants driving in a manner deemed to be dangerous by the Race Director

Cars judged by the Race Director to be in an undriveable or dangerous condition. These cars, after the repairs have been carried out, may be allowed to resume.

Cars which lose their bodies or silencers must immediately stop and carry out the necessary repairs after which they may restart.

Cars which have been black flagged may re-enter only with permission from a Race Official.



Protest must be entered by the Team Manager, in writing, in English language, within ten (10) minutes after the display of the result or after the incident it concerns, with a deposit of $50 U.S. or equivalent. The time of display of the result will be written on the result sheet. The deposit is forfeited if the protest is not upheld and the deposit is returned if protest is justified. Protests may be handed to the Race Director or an IFMAR Official.  Protests are  processed by the Race Director and, if necessary, by the Jury. Appeal to IFMAR may be made. IFMAR is not obliged to handle such appeal. Deposit returned if protest is upheld.


Requests do not need to be written and need no deposit. The Team Manager will show to the Race Director the time-lap sheet in question (the one given or displayed by the organiser) and will indicate where he thinks an error has been made. The Race Director will resolve the problem by checking with the second lap counter and, if necessary, with the manual record of stops. The audio/video tape may be used as a last resort, if necessary, for the final result. If the request is justified, the result will be modified immediately and the Race Director will advise the Team Manager, in writing, of the result. After checking, if the Team Manager         persists with his request, he will have to present a written protest within ten (10) minutes, including a $50 U.S. deposit.


During finals, participants will be allowed to change the bodies of the car with the authorisation of the Race Director, providing the bodies are of the same type and painted in the same colour scheme. In the event of a different body being fitted to the car, the Race Director must give his permission before the participant re-enters the race. Any illegal modification or change made to the car which is found during the technical inspection at the end of the race will automatically entail disqualification of the participant.

EXCEPTIONS:-  Tolerances allowed in technical inspection for fuel tanks. Any damage   incurred during a heat or final will not entail a forced stop or disqualification of the participant except in the following cases:

                        - loss of a body (the spoiler does not count as part of the body).

                        - loss of the silencer or its ability to silence the engine.

                        - a car which becomes dangerous or undriveable.

                        - The car in question may re-start after the repairs have been effected.

Any car which, by the fault of another driver, is damaged or obstructed during a heat or final cannot, under any circumstances, be allowed to re-run in another heat. All participants must strictly observe the instructions given by the Race Director, Jury and Referees.  The bad sportsmanship and behaviour of any competitor, even outside the official race meeting, which could injure the image and promotion of the sport, may become the object of an official, national or international sanction.


All official announcements concerning the race must be made in the English language in the pit area, drivers' stand and mechanics' area.


4.11.1   One IFMAR Referee will be appointed by IFMAR.  Approved travel and accommodation expenses will be paid for by IFMAR, EFRA, ROAR, FEMCA and FAMAR equally.  The IFMAR Referee will be supported by two (2) appointed deputy referees, one nominated and paid for by the host Bloc and one nominated and paid for by the host country’s association (see General Rule 1.12).  They must be experienced and unbiased people with a good knowledge of the English language and the current IFMAR rules and will have acted as a referee at least on national level before.

4.11.2   The main task of the Referees is to observe the racing and, in particular, the good sportsmanship during the racing. They will ensure that the current rules are observed by everyone.

4.11.3   Referees may be called for information by the International Jury when a meeting is called by the Race Director.

4.11.4      Referees must be provided with an area from where all parts of the track, the drivers’ rostrum and refuelling area can be
observed.  The place must be separated from the drivers’ area to ensure a quiet and undisturbed working area.  Protection (walls, roof, etc.) must be given against all weather conditions.  The place must be equipped with a minimum of three (3) chairs, a table and a monitor connected to the lapcounting system to show the race order.  There must be a separate communication system with a microphone and speakers direct to the drivers’ rostrum and the pitlane to enable Referees’ instructions to be heard only by the drivers and the mechanics in the pitlane.  N.B.  This system is to be totally separate from any public address system used for announcements.  The organiser is responsible for providing the Referees with lunch, refreshments and a ticket to the Awards’ Banquet.


4.12.1   At all time, during qualifying heats, two of the Referees present will be watching and observing the racing from start to finish.

4.12.2   During finals, all three Referees will observe the racing from start to finish.

4.12.3   During qualifying, the Referees work on an alternative relief schedule.

4.12.4   Only Referees on duty are authorise to make decisions and to issue warnings and instructions.

4.12.5   A Referee may take action after an initial warning but, in all cases, three (3) warnings means automatic disqualification from the event. Any appeal against the Referee's decision must be brought before the International Jury accompanied by a protest fee.


4.13.1   Bad sportsmanship during racing, i.e. impeding progress of other participants, deliberate slowing down or walling of another car, deliberate short-cutting of corners and reckless driving in general.

4.13.2   Unsportsmanlike behaviour of drivers, mechanics and Team Managers involved in the racing.

4.13.3   Incorrect use of entry and exit of the pits.

4.13.4   Repairs and refuelling outside the appointed pit area.

4.13.5   Mechanics going onto the track during the race.

4.13.6   Any combination of three warnings will cause disqualification.

4.13.7   Instructions may also be given by the Referees but they do not constitute a warning. Sample of instructions follow under numbers 8 and 9.

4.13.8   Cars that do not conform to the regulations before the start is given or during the race, (i.e. loss of body-shell, exceeding noise rules due to loss or damage of the silencer).

4.13.9   Cars that are in an undriveable or dangerous condition due to damage or  malfunctioning of the car (one instruction).

4.13.10 Starting procedure, i.e. writing down early starts and, if necessary, reporting to the Time Keeper. The Time Keeper and the Starter are first responsible to issue starting penalties (one lap penalty). In the event of an early start not being observed, it may be called and noted by the Referee.

4.13.11 It is not the duty or the responsibility of the Referees to check if the cars conform to the technical rules. This is always the responsibility of the Technical Inspector.

4.13.12 All warnings will be announced in the English language with the words:  "Car number .... Warning". All instructions will be announced in the English language with the words: "Car number .... Stop". Each competitor must be able to recognise the above English words and statements.


4.14.1   The IFMAR Referee has the right to use his discretion to issue a penalty instead of a warning for any serious infringement of the rules.

4.14.2   The IFMAR Referee has the right to issue penalties for pit lane infringements.  The penalties will range from time in seconds to a one (1) lap penalty.

4.14.3   The IFMAR Referee has the authority to withdraw a World Championship badge (pass) from any person contravening the World Championship Rules or spirit of the World Championship Rules.

4.14.4   The IFMAR Referee has the authority to instruct other Race Officials to take remedial action in any situation which might compromise the well running of the race meeting.  Any serious situation will be referred to the most senior IFMAR official present before taking any action.

4.14.5   The Referee issues warnings in case of infringements of any point as described under Rule 4.13 and ultimately may even issue a black flag (disqualification) when there is no response to his warnings.

4.14.6   Warnings and instructions are announced by the Referee himself. He will keep a record of the warnings and instructions used (Referee's notes). Three successive warnings lead to disqualification (black flag).

4.14.7   Instructions issued by the Referee must be observed immediately. All announcements must be made in the English language. Warnings will be posted on the result sheet.

4.14.8   Reasons for warning or instruction will be announced in the English language at time of issue. Further explanation, if necessary, due to language difficulties, will be given to the driver or the Team Manager at the end of the race.

4.14.9   Under no circumstances may a warning or an instruction issued by the Referees lead  to the interruption of the whole race.

4.14.10 During the event, only if all three Referees agree, they will have the authority to black flag a driver and/or a whole team, if one member of that team is positively interfering with the racing of another car in the event.

4.14.11 Appeals to the decision of the Referee must be addressed to IFMAR in writing. IFMAR is not obliged to act on such a complaint.


4.15.1   Referees make up a report to be sent to IFMAR within ten (10) days. The report contains information on the organisation, accommodation and the racing. The Referee's notes have to be included.

4.15.2   A copy of the report is sent to the Organiser of the race meeting. Copies may be obtained on application to IFMAR.


4.16.1   The Time-Keeping Supervisor is responsible for recording all the individual lap times and total laps plus finishing time of all drivers during all heats and finals.  He is responsible for the classification of the results and for selecting of the finals.  The Race Director must verify this classification and selection.

4.16.2   After the finish of any heat or final, the results of the first and second time-keeping systems are compared by the Time-Keeping Supervisor and, in case of difference between the two systems, the Time-Keeping Supervisor investigates both results and makes the decision of the final result.

4.16.3   In case of a request for checking of the results, the Time-Keeping Supervisor, together with the Race Director, will check on the questioned result and will make the decision.


4.17.1   The International Jury consists of official representatives of each Bloc, which will furnish a minimum of one (1) representative and a maximum of three (3) representatives to serve on the International Jury.  Each Bloc will have a total of one vote, regardless of the number of representatives it supplied.

4.17.2 The relevant IFMAR Section Chairman shall always act as Chairman during International Jury Meetings and exercise a casting vote, if necessary.  In the absence of the relevant IFMAR Section Chairman, the highest ranking IFMAR official shall take the chair at any International Jury Meetings. 

4.17.3 The Race Director and IFMAR President (see above) are members of the Jury but do not have a vote in the decisions. The
Referees may be called by the Jury for opinions and explanations as deemed necessary. All decisions are taken by simple majority vote.

4.17.4 The International Jury may request evidence and/or presence of drivers involved or Team Managers.

4.17.5 Jury members must be approved by their organisation and a second person appointed to serve in the event of a temporary absence of the official representative.

4.17.6  Prior to the commencement of an International Jury Meeting, any mobile telephones in the meeting room must be turned off and placed on the meeting table until after the completion of the Meeting.



4.18.1 To decide in unforeseen situations.

4.18.2 To handle protests not covered by the Race Director's responsibility.

4.18.3 To make official by announcement any decisions voted on by the Team Managers' Committee providing the International Jury agrees with these decisions.

4.18.4 To check that the race is run according to the official rules.

4.18.5 The Chairman of the International Jury will make official the results of the World Championship through the ranking IFMAR Officer present at the event. When necessary, the Race Director calls the International Jury to meet. The International Jury may also be called by IFMAR.

4.18.6   The organiser will provide a room for the International Jury to meet where no-one can interfere with the meeting.

4.18.7 Jury members may not have dual duties or be a race official but may act as a Referee and IFMAR Delegate. The Race Director may appoint a stand-in Referee, if required.

4.18.8 Jury members may be participants in the event but must allow auxiliary jury representatives to serve and vote in any protest involving said jury member as a participant.


4.19.1 The Race Director is responsible to follow the schedule of the event. The Race Director   ensures that various tasks under his responsibility are well done, including:

            - Time-keeping

            - Starts

            - Marshalling

            - Display of results

            - Comments to the public

            - Comments to the drivers

            - Technical inspection

            - Frequency control

4.19.2 The Race Director receives the protests and decides if the International Jury has to meet. He takes urgent decisions or stops a race for safety, rain or any other unforeseen situation. He is   under the authority of IFMAR.


The Assistant Race Director will represent the host country or organisation and will assist the Race Director in co-ordinating all race matters with host organisation officials.


4.21.1   A Technical Inspector will be appointed by IFMAR to supervise all technical inspection matters.


4.22.1   The Team Manager, or a nominated deputy, must be present during all official racing.

4.22.2   The Team Manager is appointed by his national association.

4.22.3   The responsibilities of the Team Manager are:

- To be present at the drivers' registration of his team.

- To be present at the Technical Control either before, during or after the end of the race in which his team members participate.

- To look after the welfare and behaviour of his team and take care that they all receive proper accommodation in the pit area.

- To attend the Team Managers' Meeting and any driver briefing/s that the Organiser may call.

- The Team Manager is the link between the national team and the race direction by receiving all information referring to timetable changes, frequency changes, results of heats, sub- finals and finals and all other information referring to the race.

- He is allowed to stay in the pit area when a race has a participant from his team and is in progress.


4.23.1   Each country will have a Team Manager who is responsible to pass on complaints, protests or suggestions from his team to the Race Director. The Race Director will then decide whether a Team Managers' Meeting should be called to discuss and vote on the matter raised. If the Race Director does call such a meeting and the majority of the Team Managers support the matter raised, the Race Director must then refer to the International Jury for final decision.



( Liste carrosseries 235mm )

( Règlement technique 200mm )

5. Generally the specifications allow cars with four (4) wheel drive.   A mechanically operated brake must be fitted acting on the rear wheels only, two (2) speed transmission, 2.5cu. cm (0.152 engine, and a minimum weight of 1975 grams/4.3540 lbs. including transponder. 

An IFMAR approved fuel tester NITROMAX 16, will be available to race organisers to   verify the conformity of fuel to the rules.

All measurements referred to in these rules are maximum or minimum values.  All figures in the rules should be two (2) decimal digits.

5.1       ENGINE RULES

The engines shall be air cooled,  with front rotary shaft valve, two stroke induction type and may have a maximum of four (4) gas ports including the exhaust port, no additional holes in the liner and no holes in the piston allowed.  The outer edge of  the piston must be the highest point of the piston itself.  The crankshaft hole shall have a maximum diameter of 7.00 mm/.272 in. on its end.  No form of forced induction is allowed or any form of variable port timing. Only glow plug ignition is permitted.

5.1.1     During scrutineering, engines which drivers intend to use at the event must be submitted to Technical Inspection to be checked and sealed.  If, for any reason, a driver wishes to use another engine during the event which has not been previously scrutineered, it must be submitted to the Technical Inspection Officer to be checked and sealed before it can be officially used in the event.

5.1.2     Only engines which have been inspected, found to comply to the rules and sealed by the Technical Inspection Officer will be allowed to be used.  The decision of IFMAR on whether an engine complies to IFMAR rules is always final. 


            Capacity                                                                       2.50 cc/.152

            Stroke minimum                                                           14.00 mm/.551 in.

            Exhaust Port height                                                      4.50 mm/.177 in.

            Crankshaft maximum end gas passage internal diameter  7.00 mm/.275 in.

            Carburettor maximum - throat diameter                          6.00 mm/.236 in.

5.2.1.  DEFINITIONS:  The exhaust port height is considered to be the distance from the crown of the piston to the uppermost point of the exhaust port measured with the piston at the bottom dead centre of its stroke. The crankshaft hole shall be a straight parallel hole with a maximum diameter of 7.00 mm/.275 in. on its end.  The hole can be finished with a continuous unbroken chamfer with a maximum width of 0.50 mm/.019 in. if this is required for manufacturing purposes at the crank web end.  The carburettor bore diameter restriction is to be measured at the smallest section of the carburettor bore  above  the point where  the  fuel enters the carburettor throat. 

5.3       FUEL TANK

The fuel tank including filter and fuel pipes up to the carburettor may hold a maximum of 75.00 cc/2.54 fl.ozs. No loose fuel tank inserts allowed.

5.4       MUFFLERS

5.4.1     A muffler of approved double chamber design must be fitted having the following dimensions:

            Tail pipe maximum internal diameter *                                                     5.20 mm/.205 in.

            Tail pipe minimum length                                                                        15.00  mm/.59 in.

            The tail pipe must be oriented on or below the horizontal.

            * This dimension includes a tolerance to account for manufacturing variations in    commercially available tubing.


                                                                        Minimum                                  Maximum

            Wheel base                           260.00 mm/10.24 in.                       280.00 mm/11.02 in.

            Track width                                                                                       250.00 mm/9.84 in.

            Overall length                                                                                    490.00 mm/19.29 in.

5.1     The car shall be measured for the width by placing it on a baseboard equipped with two side rails of 25.40 mm/1.00 in. in height spaced 250.00 mm/9.84 in. apart, constructed in such a way that the car can roll freely between them. Base board and rails must be constructed of high quality material, suitably stiffened to prevent distortion. The car must roll freely between the rails with any steerable wheel set in the straight ahead position, irrespective of the compression or extension of the suspension.

5.5.2   The car shall be measured for length and height in a similarly constructed box of internal dimensions 490.00 x 250.00 mm/19.29 x 9.84 in. Measurement of the wheel base may be made by simple measurement of axle centre distance but the Race Director should be prepared to make more exact checks in case of doubt or protests. It is suggested that the wheels are removed and the wheel spindles firmly placed on V-blocks whilst accurate measurements are made.

5.5.3   It is the responsibility of the driver to ensure that his car complies with the regulations at all times it is on the track and the organiser may check any car, at any time during the championship, for compliance with the regulations. On checking immediately after a race, if a car is found to be under the minimum weight or has incorrect dimensions, positive proof of race damage may prevent disqualification.

5.6       WEIGHT

5.6.1     The weight limit will be checked with the cars ready to race, but with empty fuel tanks and including transponder.

5.6.2     Minimum weight 1975 grams/4.3540 lbs.

5.6.3     The weight will be checked by a set of digital electronic scales and can be done at any time during the meeting, i.e. before the start of a heat, sub-final or final or after the end of either.  An approved test weight must be provided for checking calibration of digital electronic scales.  

5.7       FUEL

5.7.1     Fuel will only contain Methanol (Methyl Alcohol), lubricating oil and a maximum of 16% Nitromethane measured in volume.  The specific gravity of the mixture may not be heavier than 0.87.  An IFMAR approved fuel tester, e.g. NITROMAX 16, will be available to verify fuel´s conformity to the rules at Technical Inspection.

5.7.2     Random fuel tests will be made during the entire Championship. Samples and counter samples will be collected for analysis and any competitor found to be using any substance other than those mentioned above will be disqualified and any race result obtained will be null  and void. Further punishment to be determined by IFMAR, such as a ban from future international racing.

5.7.3          Only one (1) fuel bottle will be allowed in the pitlane for refuelling a car.

5.8       TYRES

            Tyres must be black, except for side wall detailing.

            Tyre diameter Front                                           75.00 mm maximum/2.95 in.

            Tyre diameter Rear                                           80.00 mm maximum/3.15 in.

            Tyre width Front                                               30.00 mm maximum/1.18 in.

            Tyre width Rear                                                51.00 mm maximum/2.00 in.

            No tyre additives or cleaners allowed.

5.9       RIMS

            Maximum diameter for Front and Rear rims is 51.00 mm/2.00 in.


5.10.1   Bodyshells from the following full-size classes will be allowed:

FIA 2-litre Championship
German Touring Car Championship
Australian Touring Car Championship
North American 2-litre Super Touring Car Championship

5.10.2   A list of acceptable bodyshells will be prepared and issued by IFMAR following submissions from EFRA, FEMCA, ROAR and FAMAR.  The list will be made available to the organiser for inclusion in the Stage II Report.  The Blocs must obtain appropriate bodyshell samples  from manufacturers within their Bloc four (4) months prior to the commencement of the event and forward them to the IFMAR I.C. Chairman one (1) month prior to the commencement of the event.

5.10.3   Only four(4)-door touring car bodies that are approved and listed by IFMAR will be allowed.  The body must be made from
a flexible material, painted properly, and must be one piece and used in the standard form, (bodyshell + wing), with no modifications or additions allowed (i.e. separate front spoiler, for example).

5.10.4   All bodies must have the front and rear sides cut out for the wheels if the original was so designed.

5.10.5   No wheels, tyres or rims of the car may extend outside the bodyshell, as viewed from above. One (1) cooling hole may be cut in the front windscreen with a maximum dimension in any direction of 50.00 mm/1.96 in. 

5.10.6   Only the front side windows and the rear window may be removed, partly or totally; other windows must remain clear.    

5.10.7   All parts of the vehicle must be covered, except:            

                        Aerial (max. 10.00 mm/.39 in.)

                        Outlet pipe of muffler (reasonable clearance)

                        Only if these parts are extending the body.

            In addition to this the following holes are allowed:

                        for muffler outlet

                        for refuelling (max. 30.00 mm/1.18 in.)

                        for glowplug (20.00 mm/.787 in.)

                        fuel mixture valve (max. 10.00 mm/.393 in.)

5.10.8      Rear of the body may not be cut away higher than 45.00 mm/1.77 in. measured with a 10.00 mm/.393 in. spacer  under the chassis plate, and rear side-light details must remain.  Side profile must remain unaltered.

5.10.9   Roll-bars (Roll-over Bars)  must be kept under the body.

5.10.10 Wings are allowed only if fitted in the original car, and must be in the original position and  may not project above the height of the roof line.  Side dams may be fitted but must be a reasonable representation of those fitted to the original car and may not be wider than 55.00 mm/2.16 in. and higher than 25.00 mm/.98 in. and fit in a rectangle of these measurements and may not project above the height of the roof line.

  Wing width                                           230.00 mm/9.05 in. Maximum

   Wing chord                                           55.00 mm/2.17 in.   Maximum

  (A 20.00 mm/.787 in. extension to the wing in the form of a tab/gurney flap is allowed, but must be clear and unpainted and still may not project above the height of the roof line). 

A level meter should be used to verify that wings and the allowed 20.00mm/.787 in. extension do not project above the height of the roof line with a 10.00mm/.393 in. spacer under the chassis plate on level.

5.10.11 Cars must be equipped with a flexible "plastic" bumper to minimize injuries.  The bumper may not protrude outside the body.

5.10.12 All cars will be equipped with brakes and a clutch in such a manner that the car may be held stationary with the engine running.

5.10.13 The aerial must be made from a flexible material in such a manner that it will bend completely under the weight of an inverted car.


5.11.1   Not allowed:

            4 wheel brakes   No independently controlled braking on the front wheels is allowed.

            Liquid cooled engines.

            Hydraulic systems.

            More than two (2) servos.

            No more than 2-speed transmissions.


5.12.1   It is not allowed to use any electronic devices with the exception of:

Two radio channels of the receiver which will be used to operate steering, throttle and brakes.

A passive data recording or information system to record functions of the car can only be used up to the end of controlled practice.

5.12.2   The use of traction control devices, active suspension devices and any steering control aided by gyroscopes/’G’-force sensors is strictly forbidden.  Sensors are only allowed for the purpose of passive data recording and not for adjusting the performance of the car whilst in motion.  It is the object of this rule to ensure that the IFMAR 1/10th I.C. 235mm and 200mm  Circuit World Championships be a test of driver skill.


Amended May 1997

                                                        Amended December 1997

                                                         Amended February 1998

                                                          Amended August 1998

                                                           Amended April 2000

                                                        Amended October, 2000

                                                        Amended October, 2001

                                                        Amended January, 2002                

                                                        Amended October, 2002

                                                        Amended October, 2003

    N.B.  See next page for 2002 IFMAR 1/10th IC Bodyshell List.




Volvo S40 EFRA 01/02 - Alain Levy
Volvo S40 EV03X - Niklas Edlund
Opel Vectra - Serpent
Alfa Romeo 156 - Serpent
Mercedes 180C – Serpent 1774
BMW 320i - Serpent 


Alfa 156 - Frewer FR31W
Opel Vectra – Frewer FR6W
Alfa Romeo 155 – Serpent 1771
Mercedes 180C – Serpent 1774


Volvo S40 BTCC - Jin Yow Yng Enterprise


N.B.  Any of the above listed bodyshells are allowed to be used for the IFMAR Pre-World Championship Race to be held in Brazil from February 26-29, 2004.  An up-dated List will be issued prior to the 2004 IFMAR 1/10th 235mm and 200mm World Championships to be held from October 7-17, 2004.





1.1  The class run will be the 200mm Nitro Touring Car which will be 4WD.  Only one (1) brake, working on the central power transmission, is allowed.  No second or individual brake system(s) for front and/or rear axles or single wheels is allowed.

1.2 Maximum 2-speed gearbox allowed.

1.3  All cars must have a de-clutching device and have an operating brake capable of stopping the car and holding the car motionless with the engine running.

 N.B.  Rule 1.4 is subject to change (awaiting IFMAR Postal Vote as at 11.11.03).

1.4       The use of .12 engines only will be permitted.  They shall be air-cooled, with front rotary valve, two stroke induction.  The engines may have a maximum of four (4) ports, including the exhaust port.  No form of forced induction is allowed or any form of variable port timing.  Only glow plug ignition is allowed.  No holes in the piston and no additional holes in the liner.  The carburettor size is to be 5.50mm.  The exhaust port height is to be 4.50mm. 
Please note that, following an IFMAR Postal Vote in December, 2003, the Blocs have agreed to delete the words "The exhaust port height is to be 4.50mm" in Rule 1.4.

1.5      Engine capacity is to be maximum .12 (2.11cc) only.

1.6      Standard pull-start is optional.

1.7      Engine internal modifications are allowed as long as they are within the parameters of Rules 1.4 and 1.5.

1.8      A muffler of approved double chamber design, including silencer chamber must be fitted having the following dimensions:

            Tail pipe maximum internal diameter* 5.20mm.

            Tail pipe minimum length 10.00mm.

            The tail pipe must be oriented on or below the horizontal.

* This dimension includes a tolerance to account for manufacturing variations in commercially available tubing.

1.9 Minimum weight without fuel: 1725.00 grams (including transponder).

1.10  Fuel tank capacity to be 75.00cc including all fuel tubing, filters, etc.  No loose inserts allowed inside the tank.

1.11 Touring car (sedan) bodies, 2 and 4-door versions allowed, as raced in the following full-size events:

FIA 2-litre Championship 

German Touring Car Championship 

Australian Touring Car Championship

North American 2-litre Super Touring Car Championship.

No GT or Sports car bodies allowed.

1.12     The front bumper must follow the body contour and must be constructed so as to minimize injury that may result from being  hit by a car.  The bumper must be made from foam rubber or a flexible plastic material.

1.13    The body must be made from a flexible material and be pained properly.  All windows must remain clear and not be pained   over or be semi-transparent.

1.14    Bodies are not to be cut above the lower bumper line at the front or the back or above the bottom line of the doors.  Rear of the body may not be cut away higher than 45.00mm measured with a 10.00mm spacer under the chassis plate.  Details of all front and rear lights, grills, air intakes and windows must be clearly contrasted from the surrounding paintwork.

 N.B.  Rule 1.15 is subject to change (awaiting IFMAR Postal Vote as at 11.11.03).

1.15     Only the following air holes and sizes are permitted in the bodyshells:

            One (1) cooling hole may be cut in the front windscreen only (not intruding on either the roof or bonnet) with a maximum dimension in any direction of 60.00mm.

            15.00mm maximum diameter hole in the roof for glow plug access.

            Both front side windows and the rear window can be removed for ventilation, except for the side rear windows, which must remain intact.

Re-fuelling hole maximum 50.00mm diameter.

Small holes can be made for the exhaust pipe, transponder and radio antenna.

No other holes are permitted.

1.16     Roll-bars (roll-over bars) must be kept under the body.

1.17     No part of the car, except the muffler outlet, may protrude outside the bodyshell when viewed from above.

1.18     Under body/chassis aerodynamic aids of any nature are not allowed.

1.19     General Dimensions  - 


Minimum (mm)

Maximum (mm)

Wheelbase 230.00 270.00

Width (without body)



Width (with body)



Length (including body and wing)



Height (to top of roof measured with a 10.00mm spacer under the chassis plate on level)





Wing width inclusive 



Wing chord



Wing endplate 35.00mm x 50.00mm – equal size



Wing overhang (at rear)



Wheel diameter (excluding tyre bead)



Wheel width (including bead)


 30.00 +1mm tolerance

Tyre width (across sidewalls)



 1.20    One (1) wing and one (1) spoiler may be mounted to any car (if the original full-size car had more, it is allowed to do the  same).  Wing and spoiler must be made from a flexible material.  Wing and spoiler must not be fixed to body with piano wire.  Basically, they must be mounted to body directly.  Wing and spoiler may not protrude outside the maximum height and width of the body (including the side dams).  Rear wings must be mounted in the same place as was intended by the body manufacturer.  The overhang must not exceed 10.00mm at the furthest point, to be measured from boot lid.

            The height of the wing may be adjusted but the wing, including endplates must not extend higher then the roofline.  Wings (excluding endplates) are to be of single moulded construction (no flat-packs/bend your own).  Gurney strip (if allowed) may not exceed the width of the wing and have an edge not more than 5.00mm high.  Total cord of wing, plus the strip is 55.00mm.

1.21    Foam and/or rubber tyres may be used.  Any materials used in, or on, the tyres must not damage the racing surface.  Treatment of the tyres with additives is prohibited.

1.22    Fuel will only contain methanol (methyl alcohol), lubricating oil and a maximum of 16% nitromethane in volume.  The specific gravity of the mixture may not be heavier than 0.87.  An IFMAR approved fuel tester, e.g. Nitromax 16 will be available at Technical Inspection  to verify fuel’s conformity to the rules.  Any fuel adjudged to be dangerous by the Organiser or Race Director may not be allowed.

1.23    The aerial support must be flexible.  Carbon, GRP, steel, etc. are not allowed.

1.24    Only two (2) servos are allowed.  Frequency must be legal as specified by Race Director.  Drivers must have more than one (1) frequency available.  Under no circumstances shall a transmitter be taken onto the track.

1.25    The use of electronic gyroscopes is not allowed.

1.26    All measurements referred to in these rules are maximum or minimum values.


Accepted November, 2002

Amended October, 2003