Article 258
Grand Touring Car Technical Regulations

Last update 24 June 1997

SUMMARY

ARTICLE 1: DEFINITIONS
1.1 Grand Touring car
1.2 Automobile
1.3 Land vehicle
1.4 Bodywork
1.5 Original
1.6 Event
1.7 Weight
1.8 Racing weight
1.9 Wheel
1.10 Door
1.11 Cockpit
1.12 Supercharging
1.13 Sprung suspension
1.14 Active suspension
1.15 Mechanical components
1.16 Telemetry
1.17 Semi automatic gearbox

ARTICLE 2: REGULATIONS
2.1 Role of the FIA
2.2 Permitted modifications
2.3 Vehicle eligibility
2.4 Eligible cars
2.5 Regulation and eligibility amendments
2.6 Compliance with the regulations
2.7 Measurements
2.8 Electronic system

ARTICLE 3: BODYWORK AND DIMENSIONS
3.1 Dimensions
3.2 Overhangs and wheelbase
3.3 Doors
3.4 Windscreen and windows
3.5 Bodywork
3.6 Bodywork modifications

ARTICLE 4: WEIGHT
4.1 Minimum weight
4.2 Ballast
4.3 Adding during the race
4.4 Liquids

ARTICLE 5: ENGINE
5.1 Type and position of engine
5.2 Engine modifications
5.3 Normally aspirated engines
5.4 Turbocharged engines
5.5 Temperature of the charge
5.6 Cooling
5.7 Exhaust
5.8 Telemetry

ARTICLE 6: FUEL PIPING, PUMPS AND TANKS
6.1 Fuel tanks
6.2 Fittings and piping
6.3 Fuel tank fillers
6.4 Refuelling
6.5 Fuel capacity

ARTICLE 7: OIL SYSTEM
7.1 Oil tanks
7.2 Catch tank

ARTICLE 8: ELECTRICAL EQUIPMENT
8.1 Battery
8.2 Windscreen wiper
8.3 Starting
8.4 Lighting equipment

ARTICLE 9: TRANSMISSION
9.1 Transmission to the wheels
9.2 Reverse gear

ARTICLE 10: SUSPENSION AND STEERING
10.1 Sprung suspension
10.2 Suspension type and mounting (Class1)
10.3 Suspension type and mounting (Class2)
10.4 Chromium plating
10.5 Suspension members
10.6 Steering (Class1)
10.7 Steering (Class2)
10.8 Power steering
10.9 Four wheel steering

ARTICLE 11: BRAKES
11.1 Separate circuit
11.2 Brake discs
11.3 ABS, Servobrakes

ARTICLE 12: WHEELS AND TYRES
12.1 Dimensions
12.2 Location
12.3 Wheel material
12.4 Number of wheels
12.5 Wheel attachment
12.6 Pneumatic jacks
12.7 Pressure control valves

ARTICLE 13: COCKPIT
13.1 Equipment which may be removed from the cockpit
13.2 Equipment permitted in the cockpit
13.3 Cockpit exit time

ARTICLE 14: SAFETY EQUIPMENT
14.1 Fire extinguishers
14.2 Safety belts
14.3 Rear view mirrors
14.4 Seat and headrest
14.5 Master switch
14.6 Towing eye

ARTICLE 15: SAFETY STRUCTURES
15.1 Magnesium sheet
15.2 Rollover structure
15.3 Firewall and floor
15.4 Crash test

ARTICLE 16: FUEL
16.1 Fuel specification
16.2 Air

ARTICLE 17: FINAL TEXT


ARTICLE 1: DEFINITIONS

1.1 Grand Touring car:

An open or closed automobile which has no more than one door on each side, has no more than four seats, is fully legal for road use and has been modified to ensure suitability for speed races on circuits or closed courses.

1.2 Automobile:

A land vehicle running on at least four non-aligned complete wheels, of which at least two are used for steering and at least two for propulsion.

1.3 Land vehicle:

A locomotive device, propelled by its own means, moving by constantly taking real support on the earth's surface, of which the propulsion and steering are under the control of a driver aboard the vehicle.

1.4 Bodywork:

All entirely sprung parts of the car in contact with the external air stream, except the parts definitely associated with the mechanical functioning of the engine, transmission and running gear. Any air intake shall be considered to be part of the bodywork.

1.5 Original:

As fitted to the road registered FIA homologated car.

1.6 Event:

An event shall consist of official practice and the race.

1.7 Weight:

Is the weight of the car without the driver at all times during the event.

1.8 Racing weight:

Is the weight of the car in running order with the driver aboard and the fuel tank full.

1.9 Wheel:

Flange and rim. Complete wheel: Flange, rim and tyre.

1.10 Door:

That part of the bodywork that opens to give access to the driver and passenger compartments.

1.11 Cockpit:

The volume which accommodates the driver and the passenger.

1.12 Supercharging:

Increasing the weight of the charge of the fuel/air mixture in the combustion chamber (over the weight induced by normal atmospheric pressure, ram effect and dynamic effects in the intake and/or exhaust system) by any means whatsoever. The injection of fuel under pressure is not considered to be supercharging.

1.13 Sprung suspension:

The means whereby all complete wheels are suspended from the body/chassis unit by a spring medium.

1.14 Active suspension:

Any system which allows control of any part of the suspension or of the trim height when the car is moving.

1.15 Mechanical components:

All those necessary for the propulsion, suspension, steering and braking, as well as all accessories, whether moving or not, which are necessary for their normal working.

1.16 Telemetry:

The transmission of data between a moving car and anyone connected with the entry of that car.

1.17 Semi automatic gearbox:

One which, when the driver calls for a gear change, takes over the control of one or more of the engine, clutch and gear selectors momentarily to enable the gear to be engaged.

ARTICLE 2: REGULATIONS

2.1 Role of the FIA:

The following technical regulations for Grand Touring cars are issued by the FIA.

2.2 Permitted modifications:

All modifications not allowed by these regulations are expressly forbidden.

2.3 Vehicle type eligibility:

2.3.1 - Vehicles will be eligible in two different classes. For a vehicle to be eligible in either class, it must be an FIA homologated Grand Touring car which is also recognised by the FIA as a bona fide road car which is on genuine and general sale to the public and has been type approved for EEC use, or has undergone the same level of tests in USA or Japan.

A manufacturer seeking homologation must send a completed homologation form, a technical manual and brochures for the car and make a car available for inspection. The entire dossier will then go before the FIA Homologation Working Group for approval.

2.3.2 - A car may not be homologated in both classes. However, a car which is homologated in Class2 may compete in Class1.

2.4 Eligible cars:

A list of homologated GT cars will be published by the FIA.

2.5 Regulation and eligibility amendments:

Each year in October at the latest the FIA will publish changes made to these regulations. All such changes will take effect on the second 1st of January following their publication.

Changes for safety reasons may be made without notice.

Changes covered by Articles4.1.3, 5.3.4, 5.4.5 and 6.5.2 will be made in accordance with the period of notice specified in the relevant Sporting Regulations, save in circumstances deemed to be exceptional by the governing body of the relevant Championship.

2.6 Compliance with the regulations:

It is the duty of each competitor to satisfy the Scrutineers and the Stewards of the Meeting that his automobile complies with these regulations in their entirety at all times during an event.

A car, the construction of which is deemed to be dangerous, may be excluded by the Stewards of the meeting.

2.7 Measurements:

All measurements must be made while the car is stationary on a flat horizontal surface or as provided in the Sporting Regulations of the relevant Championship.

2.8 Electronic system :

Any automatic or electronic chassis control system or function is forbidden. This includes anti-lock braking, traction control, automatic or semi-automatic transmissions, power actuated clutches, electronically or automatically adjusted final drive differential systems, damper suspension or ride height adjustment, power braking, four wheel steering, moveable ballast.

Semi-automatic or automatic gearboxes and differentials with electronic, pneumatic or hydraulic slip control are forbidden. Closed-loop electronically controlled systems are prohibited. A simple open-loop electrical switch activated by the driver acting on the electrical system of the engine is not considered to be an electronic control.

Power steering may be employed as long as it is a simple system, without programmable control.

ARTICLE 3: BODYWORK AND DIMENSIONS

3.1 Dimensions:

All bodywork dimensions and shape must remain original with the exception of alterations required by Article3.5.1 and those permitted under Article3.6.

3.2 Overhangs and wheelbase:

Front overhang, rear overhang and wheelbase must remain original.

3.3 Doors:

The dimensions and functions of the doors must remain original.

3.4 Windscreen and windows:

A windscreen made of one piece of laminated glass, or of an equivalent material approved by the FIA is compulsory.
The side and rear windows may be replaced with polycarbonate and the side windows on the driver's side may be replaced with nets.
Additional fastenings may be used.
Holes may be made through the side windows for the sole purpose of cockpit ventilation.

3.5 Bodywork:

3.5.1 - Between the front and rear wheel centre lines all bodywork visible from directly beneath the car, with the exception of wheel arches and exhaust tunnels, must lie on one plane. All these parts must produce a uniform, solid, hard, continuous, rigid (no degree of freedom in relation to the body/chassis unit), impervious surface, under all circumstances. The periphery of the surface formed by these parts may be curved upwards with a maximum radius of 25mm.

To help overcome any possible manufacturing problems, a tolerance of +/-5mm is permissible across this surface. No sprung part of the car is permitted below the flat bottom. No air may pass above this surface. However two circular openings of not more than 200mm in diameter in the flat bottom for the purpose of cooling the exhaust, as well as minimum openings allowing the use of air jacks.

It is permitted to add an inclined, perfectly flat panel with no openings:

-between the rear edge of the flat bottom and the vertical plane formed by the rearmost vertical panel of the bodywork.

-between the vertical planes formed by the inside faces of the rear wheels.

No point of this inclined panel is permitted more than 150mm above the flat bottom. Vertical fins are allowed provided:

-they remain parallel to the longitudinal centre-line of the car.

-they exert no aerodynamic influence.

No air may pass above this surface.

3.5.2 - With the exception of the lower half of the complete wheels, the bodywork must cover all mechanical components in vertical projection seen from above.

3.5.3 - Any air intake higher than the highest point of the windscreen must not be forward of that point.

3.5.4 - Any part of the bodywork, including any part having an aerodynamic influence, must be rigidly secured to the entirely sprung part of the car (chassis/body unit), must not have any degree of freedom, must be securely fixed and remain immobile in relation to this part while the car is in motion.

3.5.5 - Any device or construction that is designed to bridge the gap between the sprung part of the car and the ground is prohibited under all circumstances.

3.5.6 - Material used for the bonnet, boot, doors and wings is free, but where a panel is replaced, it must be attached in a way which is at least as strong as the original method.

There must be at least two safety fasteners securing bonnet/boot/engine covers, both of which are clearly indicated by red (or contrasting colour) arrows. It must be possible to remove or open the bonnet and boot without the use of tools.

3.5.7 - The cockpit opening of open cars must be symmetrical when viewed in plan or left/right elevation. The passenger area must not be covered.

3.5.8 - All bodywork joints in the vicinity of the refuelling connections must be designed in such a way as to prevent any leakage of fuel into the engine compartment or cockpit during refuelling.

3.5.9 - No part of the car must touch the ground when both the tyres on one side are deflated. This test will be carried out on a flat surface, in race trim, with the driver on board.

3.6 Bodywork modifications:

3.6.1 - Strengthening of the chassis and bodywork is allowed provided that the material used follows the original shape and is in direct contact with it.

Furthermore, reinforcement bars may be fitted on the suspension mounting points to the bodyshell of the same axle, on each side of the car's longitudinal axis.

3.6.2 - The width of the bodywork across the front and rear wheel arches may be increased by a maximum of 10cm. In all cases, the total width of the car modified in this way must not exceed 2m10.

These modifications must result in the panel being as close to the original as possible in appearance.

3.6.3 - A rear wing may be mounted. It may replace an existing wing but not be added to it. The whole of the wing must not exceed the perimeter of the bodywork when viewed from above the car, and none of its parts must constitute the highest point of the bodywork. It must not include more than one wing section with a single flap. No air may circulate between the wing section and the flap.

The rear wing must be contained within a parallelogram of 520 x 150 mm with a wing section chord of a maximum of 400mm.

If the original wing is fitted, it must not in any circumstances exceed the perimeter of the bodywork when seen from above, and none of its parts must constitute the highest point of the bodywork.

3.6.4 - Bodywork may be modified below the horizontal plane of the front wheel axis and forward of the complete front wheels, provided that:

-it does not exceed the width of the bodywork across the front wheel arches (Art.3.6.2).

-the bodywork up to 180mm from the ground does not extend beyond 80mm horizontally in relation to the maximum perimeter of the part of the original bodywork of the car situated more than 180mm above the ground (Drawings 258-1 and 258-2).

3.6.5 - Bodywork may be added between the front and rear wheel arches provided it is below the lowest wheel centre line, that it is not visible from above the car and Article3.5.8 may be satisfied.

3.6.6 - Internal wheel arches may be modified to accommodate larger wheels but must be at least as strong as the original.

3.6.7 - Any parts following the external contour of the bodywork and less than 25mm high will be considered as decorative strips and may be removed.

3.6.8 - Two holes for cooling the rear brakes may be added, one each side of the car, provided that each does not exceed 155cm2 in area and that nothing protrudes beyond the original surface of the bodywork.

Air inlets must:

-have a single, precise function: cooling, ventilation.

-not protrude beyond the outline of the car when viewed from above.

-not extend beyond the surface of the bodywork. However, air inlets may protrude beyond the roof (the surface limited by the top of the windscreen, the side windows and the rear window) provided that:

-they do not protrude forward of the highest point of the windscreen.

-they do not exceed the highest point of the roof of the car.

Air extraction louvres are authorised on the rear vertical panel of the car provided that they do not allow the mechanical parts and the wheels to be seen from the rear, and that they do not extend more than 20mm beyond the surface of the bodywork.

Bodywork may be modified to incorporate louvres above the engine compartments and coolers, for the sole purpose of extracting heat. These louvres must not protrude above the original bodywork when viewed from the side, and must not alter the original external appearance, nor allow any mechanical part to be seen when the car is viewed from above and from the side. If the louvres are not used. the only visible mechanical parts are those belonging to the series-produced vehicle.

3.6.9 - Modifications required to fit additional lighting and refuelling connectors are permitted.

3.6.10 - A maximum of one or two volumes, of a minimum total volume of 150 dm3 is(are) obligatory for cars of new construction. The boot may consist of the space located behind the front seats in their rearmost position and up to the base of the rear window. In all cases, the remaining volume of the cockpit must comply with the Group B capacity and visibility dimensions.

ARTICLE 4: WEIGHT

4.1 Minimum weight (Class1 and Class2):

4.1.1 - The weight of the car must not be less than 900kg.

See Appendix1.

4.1.2 - If a car is fitted with four wheel drive 100kg must be added to any weight laid out in Appendix1.

4.1.3 - The right is reserved, by the Sporting Authority of the relevant Championship, to adjust the weight of any car to maximise equality of performance.

4.2 Ballast:

Provision must be made to secure ballast such that tools are required for its removal and to allow the fixing of seals by the scrutineers.

4.3 Adding during the race:

The adding to the car during the race of any solid material whatsoever or the replacement during the race of any part of the car with another which is materially heavier is forbidden.

4.4 Liquids:

The weight may be checked at any time during the event with the quantity of liquids remaining in the tanks except after the race where the car may be emptied of all the fuel before weighing.

ARTICLE 5: ENGINE

Provided the regulations in Articles5.1 to 5.8 are complied with, the engine and ancillaries are free.

5.1 Type and position of engine:

The make and type of engine used must remain original. The position of the engine is free provided the location and orientation remains original. The interior dimensions of the cockpit must remain original if the engine is re-positioned.

5.2 Engine modifications:

5.2.1 - The engine must retain the original cylinder block, cylinder heads, valve angles, number and location of camshafts and firing order.

The addition of material to the block or heads is not permitted. However, it is permitted to sleeve a block that originally is not fitted with sleeves, by welding if necessary.

It is also permitted to modify or close the lubrication holes in the cylinder head, close standard injector holes or to use helicoils.

5.2.2 - Variable valve timing is not permitted.

5.2.3 - Variable length inlet systems are not permitted.

5.2.4 - Titanium is not permitted unless used in the original car. In GT1, titanium can be used in connecting rods, valves, valve retainers and heat shields.

5.2.5 - The use of magnesium is not permitted unless it is used in the original engine.

5.2.6 - The use of any ceramic component is forbidden.

5.2.7 - The use of carbon or composite materials is restricted to clutches and non-stressed covers or ducts.

5.2.8 - Only a direct mechanical linkage between the throttle pedal and the engine is permitted.

Systems listed above in 5.2.2 - 5.2.8 may be used if they are fitted as original equipment using original parts. However, if a manufacturer intends to use any of these they must appear on the homologation form.

5.3 Normally aspirated engines:

5.3.1 - The engine air intake system must be fitted with one or two air restrictors 3mm long with maximum diameters laid out in Appendix1.

5.3.2 - All the air feeding the engine must pass through these restrictors, which must be made of metal or metal alloy.

5.3.3 - The entire intake system including manifolds, injectors, airbox and restrictors must be capable of fitting into a box 100cm long x 50cm wide x 50cm high or into an equivalent volume.

5.3.4 - The right is reserved, by the Sporting Authority of the relevant Championship, to adjust the size of these air restrictors to maximise equality of performance.

5.4 Turbocharged engines:

5.4.1 - Turbochargers can be fitted to GT1 cars even if the road version is not turbocharged/supercharged.

In GT2, turbochargers may only be used if fitted to the FIA homologated road car.

The maximum capacity of turbocharged engine is 4000 cm3.

5.4.2 - The engine air intake system must be fitted with one or two air restrictors 3mm long with maximum diameters laid out in Appendix1.

5.4.3 - All restrictors must be placed no further than 50mm from the forward face of the compressor wheel blades.

5.4.4 - All the air feeding the engine must pass through these restrictors, which must be made of metal or metal alloy.

5.4.5 - The right is reserved, by the Sporting Authority of the relevant Championship, to adjust the size of these air restrictors to maximise equality of performance.

5.4.6 - Turbocharged cars must not to be equipped with any device which allows the boost pressure or the electronic management system controlling the boost pressure, to be adjusted while the car is in motion.

5.4.7 - Variable diameter inlets and adjustable internal vanes on turbochargers are forbidden.

5.5 Temperature of the charge:

5.5.1 - With the exception of location, intercoolers are free and may be used for cooling intake air. However, any modifications carried out to accomodate a different intercooler must not alter the structural integrity of the car.

Apart from intercoolers, any device, system, procedure, construction or design the purpose and/or effect of which is any decrease whatsoever of the temperature of the intake air and/or of the charge (air and/or fuel) of the engine is forbidden.

The pipes between the supercharging device, the intercooler and the manifold are free, but their only function must be to channel air.

5.5.2 - Internal and/or external spraying or injection of water or any substance whatsoever is forbidden (other than fuel for the normal purpose of combustion in the engine).

5.6 Cooling:

Provided the method of cooling is retained, the cooling system is free but the water radiator must remain in the original position.

5.7 Exhaust:

Provided the regulations in Articles5.7.1, 5.7.2, 5.7.3 and 5.7.4 are complied with, the exhaust system is free.

5.7.1 - The exhaust system should incorporate one or more FIA accepted catalytic converters, which should be functioning at all times and through which all exhaust gases should pass.

5.7.2 - The noise generated by the car is not to exceed 110dB (A) at 3800rpm, or at three quarter maximum revs if less.

This will be measured at a distance of 0.5m and at a 45degree angle to the point of exit of the exhaust.

All measures which are taken to ensure that the maximum noise limits are not exceeded must be permanent in nature, and must not be removed by the exhaust gas pressure.

5.7.3 - The orifices of the exhaust pipes must be placed at a maximum of 45cm and a minimum of 10cm from the ground. The exit of the exhaust pipe must be situated within the perimeter of the car and less than 10cm from this perimeter, and aft of the vertical plane passing through the centre of the wheelbase. Moreover, adequate protection must be provided in order to prevent heated pipes from causing burns.

The exhaust system must not be provisional. Exhaust gas may only exit at the end of the system. Parts of the chassis must not be used to evacuate exhaust gases.

5.7.4 - The underbody and bulkhead may be modified for the installation of the exhaust system, but these modifications may only serve to accommodate or provide clearance for the exhaust system.

The exhaust system must be adequately isolated from the driver compartment.

5.8 Telemetry:

The use of telemetry is forbidden.

ARTICLE 6: PIPING, PUMPS AND FUEL TANKS

Provided the regulations in Articles6.1; 6.2 and 6.3 are complied with, the fuel system is free.

6.1 Fuel tanks:

6.1.1 - All fuel tanks must be placed in the luggage compartment or in the original location and must be separated from the driver and engine compartment by a firewall.

6.1.2 - All fuel tanks must be rubber bladders conforming to or exceeding the specification of FIA/FT3.

6.1.3 - All rubber bladders must be made by manufacturers recognised by the FIA.

In order to obtain the agreement of the FIA a manufacturer must prove the compliance of its product with the specifications approved by the FIA. These manufacturers must undertake to deliver to their customers exclusively tanks complying with the approved standards. A list of approved manufacturers is available from the FIA.

6.1.4 - All rubber bladders shall have a printed code indicating the name of the manufacturer, the specifications to which the tank has been manufactured and the date of manufacture.

6.1.5 - No rubber bladders shall be used more than 5years after the date of manufacture, unless inspected and recertified by the manufacturer for a period of up to another 2years.

6.2 Fittings and piping:

6.2.1 - All fuel fittings in the tank (including air vents, inlets, outlets, tank fillers, inter tank connectors and access openings) must be metal fittings bonded into the fuel tank.

6.2.2 - All fuel lines between the fuel tank and the engine must have a self sealing breakaway valve. This valve must separate at less than 50% of the load required to break the fuel line fitting or to pull it out of the fuel tank.

6.2.3 - No lines containing fuel, cooling water or lubricating oil may pass through the cockpit.

6.2.4 - All lines must be fitted in such a way that any leakage cannot result in accumulation of fluid in the cockpit.

6.2.5- When flexible, all lines must have threaded connectors and an outer braid which is resistant to abrasion and flame.

6.2.6 - All fuel and lubricating oil lines must have a minimum burst pressure of 41bar at the maximum operating temperature of 135C.

6.2.7 - All hydraulic fluid lines which are not subjected to abrupt changes in pressure, with the exception of lines under gravity head, must have a minimum burst pressure of 408bar at the maximum operating temperature of 204°C when used with steel connectors and 135°C when used with aluminium connectors.

6.2.8 - All hydraulic fluid lines subjected to abrupt changes in pressure must have a minimum burst pressure of 816bar at the maximum operating temperature of 204°C.

6.2.9 - No hydraulic fluid lines may have removable connectors inside the cockpit.

6.2.10 - The vent lines must be fitted with a gravity activated roll-over valve.

All the fuel pumps must only operate when the engine is running, except during the starting process.

6.3 Fuel tank fillers:

6.3.1 - All cars must be fitted with fuel tank fillers and vents which must be combined, or single units installed on both sides of the car (in accordance with drawing 252-5; the interior diameter D must not exceed 50mm).

Both fillers and air vents must be equipped with leakproof dry break couplings complying with the dead man principle and therefore not incorporating any retaining device when in an open position.

6.3.2 - The tank fillers, vents and caps must not protrude beyond the bodywork. The fillers may be situated in the rear windows, if so they must be separated from the driver and engine compartment by a firewall.

6.3.3 - The tank fillers, vents and breathers must be placed where they would not be vulnerable in the event of an accident.

6.3.4 - Unless the tank fillers are connected directly to the tank, there must be a valve, supplied by the tank manufacturer, at the top of the tank which seals in the event of the filler being knocked off during an accident.

6.3.5 - Any breather pipe connecting the tank to atmosphere must exit on the outside of the bodywork, must be fitted with a non return valve and must be designed in such a way as to avoid any liquid leakage when the car is running or upside down.

6.3.6 - All cars must be fitted with a self sealing connector which can be used by the scrutineers to obtain fuel from the tank.

This connector must be the type approved by FIA and must be fitted immediately before the injectors.

6.4 Refuelling during the race:

6.4.1 - Refuelling the car by any other means than by gravity with a maximum height of 2metres above the track where the refuelling takes place is forbidden throughout the event.

6.4.2 - During the race, only one autonomous supply tank complying with the drawing 252-7 must be used per car. This tank must have a simple cylindrical internal shape and must not have any additional internal parts.
A flow restrictor with the following dimensions:
- thickness: 2mm
- maximum internal diameter: 33mm
must be put at the exit of the refuelling tank (drawing 258-4)

6.4.3 - Above the tank there must be either a collector tank of at least 5litres capacity or a vent at least 1m above.

6.4.4 - The refuelling pipe, minimum length 250cm, must be provided with a leak proof coupling to fit the filler mounted on the car, and during refuelling the outlet of the air vent must be connected with the appropriate coupling to the supply tank.

6.4.5 - Before refuelling commences, the car connector must be connected electrically to earth.

All metal parts of the refuelling system from the coupling to the supply tank and its rack must also be connected to earth.

6.4.6 - A 90 cut off valve, situated on the outlet of the supply tank and controlling the fuel flow must be manned at all times during refuelling.

6.4.7 - All hoses and fittings from the supply tank to the car and back must have a maximum inside diameter of 1.5".

6.4.8 - During practice, the standard supply tank or an unpressurised container not exceeding 25 litres capacity which is vented to air and has a leak proof coupling connecting it to the tank filler on the car can be used.

6.4.9 - If a meter is used it must be of a FIA homologated type.

If an external sight glass is fitted to the tank, it must be fitted with isolating valves as close as possible to the tank.

6.4.10 - Refuelling on the starting grid is forbidden.

6.4.11 - The storing of fuel on board the car at a temperature less than 10°C below the ambient temperature is forbidden.

The use of a specific device, whether on board the car or not, to reduce the temperature of the fuel below the ambient temperature is forbidden.

6.5 Fuel capacity:

6.5.1 - The maximum amount of fuel which may be carried on board is 100litres. Any device, system, procedure, construction or design, the purpose and/or effect of which is any increase whatsoever, even temporarily, of the total fuel storage capacity beyond the maximum of 100litres is forbidden.

6.5.2 - The right is reserved, by the Sporting Authority of the relevant Championship, to adjust the size of the fuel tank to maximise equality of performance.

ARTICLE 7: OIL SYSTEM

Provided the regulations in this Article are complied with, the oil system is free.

7.1 Oil tanks:

7.1.1 - If oil storage tanks are not located in the original position they must be surrounded by a 10mm thick crushable structure.

7.1.2 - The oil tank must not be located in the cockpit.

7.2 Catch tank:

When a car's lubrication system includes an open type sump breather, it must vent into a catch tank of at least 3litres capacity.

ARTICLE 8: ELECTRICAL EQUIPMENT

Provided the regulations in this Article are complied with, the electrical system is free.

8.1 Battery:

Batteries must be securely fixed and completely surrounded by a box made of insulating material. If located in the cockpit they must be in the place of the co-driver and the protection box must include an air vent which exits outside the cockpit.

8.2 Windscreen wiper:

The car must be fitted with at least one effective windscreen wiper which must be in working order throughout the Event.

8.3 Starting:

A starter must be fitted and be in working order at all times during an Event. The driver must also be able to operate the starter when seated normally.

8.4 Lighting equipment:

8.4.1 - All lighting equipment must be in working order throughout the Event.

8.4.2 - With the exception of the number plate light, the original function of all exterior lighting equipment must be retained, but supplementary lighting may be added.
For safety reasons, it is obligatory for head lights to produce a white beam in the case of GT1 vehicles or a yellow beam in the case of GT2 vehicles.
For races run in the daytime, GT2 cars must be equipped with yellow headlight covers.

8.4.3 - Reverse lights : The bulbs of the reverse lights must be removed.

8.4.4- Light for rain : The car must be equipped with a rear red light for rain.

ARTICLE 9: TRANSMISSION TO THE WHEELS

Provided the regulations in this Article are complied with, the transmission system is free.

9.1 Transmission to the wheels:

9.1.1 - Four wheel drive may only be used if it is fitted as original equipment. In this case only homologated parts may be used except for the transmission shafts and halfshafts which are free.

9.1.2 - The position of the gearbox is free provided the location and orientation remains original. The gearbox must comprise a maximum of 6 ratios and a reverse gear. The interior dimensions of the cockpit must remain original if the gearbox is re-positioned.

9.1.3 - Viscous differentials are not considered to have hydraulic slip control, provided outside control is not possible when the car is in motion.

9.1.4 - For safety reasons, the transmission must be designed in such a way that should the car be stopped and the engine stalled, it is possible to push it or tow it.

9.2 Reverse gear:

All cars must have a reverse gear which, at any time during the event, can be selected while the engine is running and used by the driver when seated normally.

ARTICLE 10: SUSPENSION AND STEERING

10.1 Sprung suspension:

Cars must be fitted with sprung suspension.

The springing medium must not consist solely of bolts located through flexible bushes or mountings.

There must be movement of the wheels to give suspension travel in excess of any flexibility in the attachments.

10.2 Suspension type and mounting (Class1):

10.2.1 - All suspension components are free but the suspension type and method of operation must remain original.

10.2.2 -The position of the suspension mounting points on the chassis is free, while respecting their number and the original type of the suspension.

10.2.3 - The addition of an anti roll bar is permitted.

10.2.4 - Modification of sprungs, shock absorbers and rollbars adjustement from inside the car will not be permitted.

10.3 Suspension type and mounting (Class2):

10.3.1 - All suspension components, with the exception of parts specifically mentioned, must be original equipment supplied by the manufacturer. These parts may be strengthened provided the original part can still be identified.

10.3.2 - Suspension mounting points must remain in the original position but may be strengthened.

10.3.3 - Rubber joints may be replaced by unibal joints.

10.3.4 - The addition of an anti roll bar is permitted.

10.3.5 - The material, number and dimensions of the springs are free.

The modification of spring, schock absorber and rollbar adjustments from the cockpit is prohibited.

10.3.6 - Shock absorbers are free provided their number remains original.

10.4 Chromium plating:

Chromium plating of steel suspension members is forbidden.

10.5 Suspension members:

All suspension members must be made from an homogeneous metallic material.

10.6 Steering (Class1):

10.6.1 - The steering system is free but must consist of a mechanical link between the driver and the wheels.

10.7 Steering (Class2):

10.7.1 - All steering components, with the exception of the steering ratio, must be original equipment supplied by the manufacturer. These parts may be strengthened provided the original part can still be identified.

10.8 Power steering :

Power steering may be disconnected.

10.9 Four wheel steering :

The use of four wheel steering is forbidden.

ARTICLE 11: BRAKES

11.1 Separate circuits:

With the exception of 2) below, the complete braking system is free provided it incorporates at least two separate circuits operated by the same pedal. This system must be designed so that if leakage or failure occurs in one circuit, the pedal shall operate the brakes on at least two wheels.

11.2 Brake discs:

For Class2 cars only, brake discs must be made from ferrous material. The use of titanium is authorised for the brake pistons and for the brake disc attachments.

11.3 ABS, Servobrakes

From 01.04.97 until 31.12.97, ABS and servobrakes are authorised in Class 2, as long as the system used is simple, devoid of programmable controls and approved by the FIA.

ARTICLE 12: WHEELS AND TYRES

12.1 Dimensions:

12.1.1 -

Class1: Maximum width of the rim/tyre assembly is 14".

Class2: Maximum width of the rim/tyre assembly is 12".

Maximum complete wheel diameter: 28".

12.1.2 - Measurements will be taken horizontally at axle height.

12.2 Location:

The complete wheel above the hub centre line must be able to be housed within the wheel arch.

12.3 Wheel material:

Wheel material is free but they must be made from an homogeneous metallic material.

12.4 Number of wheels:

The maximum number of wheels is four.

12.5 Wheel attachment:

Wheel attachment is free but if a single wheel nut is used, a safety spring must be in place on the nut whenever the car is running and must be replaced after each wheel change. These springs must be painted dayglo red or orange. Alternatively, another method of retaining the wheels may be used, provided it has been approved by the FIA.

12.6 Pneumatic jacks:

Pneumatic jacks may be fitted to the car, but compressed air bottles are not to be carried on board.

12.7 Pressure control valves:

Pressure control valves on the wheels are forbidden.

ARTICLE 13: COCKPIT

13.1 Equipment in the cockpit:

13.1.1 - The following must be removed from the cockpit:

-Roof padding and lining

-Steering lock

-Carpets and insulating material

13.1.2 - The following may also be removed from the cockpit:

-Seats

-All trim except the dashboard

-Heating system and air conditioning, but an adequate ventilation and demisting system must be retained

-Window winding mechanisms, central locking systems and any other systems fitted to the original car solely for the comfort of the driver or passengers.

13.2 Equipment permitted in the cockpit:

13.2.1 - The only components which can be added in the cockpit are:

-Safety equipment and structures

-Tool kit

-Seat, instruments and any other controls necessary for driving

-Electronic equipment

-Driver cooling system.

-Ballast

-Pneumatic jacks and their pipes

-Battery

-Ventilation equipment

-Door trims may be replaced with different material

13.2.2 - None of the above items may hinder cockpit exit.

13.2.3 - The above components must be covered where necessary by a rigid protective material to minimize injury and must be attached such that they are able to withstand 25g deceleration.

13.3 Cockpit exit time:

13.3.1 - The cockpit must be designed so as to allow the driver to get out from his normal driving position in 7seconds through the driver's door and in 9seconds through the passenger's door.

13.3.2 - For the purposes of the above tests, the driver must be wearing all normal driving equipment, the seat belts must be fastened, the steering wheel must be in place in the most inconvenient position, and the doors must be closed.

ARTICLE 14: SAFETY EQUIPMENT

14.1 Fire extinguishers:

14.1.1 - All cars must be fitted with two fire extinguishing systems, one which will discharge into the cockpit and one into the engine compartment.

14.1.2 - Permitted extinguishants:

a)BCF (CF2ClBr)

b)NAF S3

c)NAF P

d)Any AFFF which has been specifically approved by the FIA (See "Technical List No 6").

e)Dry powder is also permitted but only on cars being used in or coming from countries where national regulations preclude the use of the above products.

14.1.3 - Minimum extinguisher capacity:

a) BCF: Cockpit: 1.65 litres
Engine: 3.30 litres
b) NAF S3: Cockpit: 1.65 litres
Engine: 3.30 litres
c) NAF P: Cockpit: 1.65 litres
Engine: 3.30 litres
d) AFFF:The capacity may vary
according to the type used
(See "Technical List No 6").
e) Powder: Cockpit: 1.65 litres
Engine: 3.30 litres

14.1.4 - Minimum quantity of extinguishant:

a) BCF: Cockpit 2.50 kg
Engine 5.00 kg
b) NAF S3: Cockpit 2.00 kg
Engine 4.00 kg
c) NAF P: Cockpit 2.00 kg
Engine 4.00 kg
d) AFFF:The quantity may vary
according to the type used
(See "Technical List No 6").
e) Powder: Cockpit 1.20 kg
Engine 2.40 kg

14.1.5 - Discharge time:

Engine: 30secs min/ 80secs max

Cockpit: 10secs min/ 40secs max

Both extinguishers must be released simultaneously.

14.1.6 - All extinguishers must be pressurised according to the contents:

a)BCF: 7.00 bar

b)NAF S3: 7.00 bar

c)NAF P: 7.00 bar

d)AFFF: The pressure may vary according to the type used (See "Technical List No 6").

e)Powder: 13.50 bar

Furthermore, each extinguisher when filled with an AFFF must be equipped with a means of checking the pressure of the contents.

14.1.7 - The following information must be visible on each extinguisher:

a)Capacity

b)Type of extinguishant

c)Weight or volume of the extinguishant

d)Date the extinguisher must be checked, which must be no more than two years after the date of filling or the date of the last check.

14.1.8 - All extinguishers must be adequately protected and must be situated within the survival cell. In all cases their mountings must be able to withstand a deceleration of 25g.

All extinguishing equipment must withstand fire.

It is strongly recommended that fire-resistant pipes are used: plastic pipes are discouraged and pipes made from metal are strongly recommended.

14.1.9 - Any triggering system having its own source of energy is permitted, provided it is possible to operate all extinguishers should the main electrical circuits of the car fail.

The driver must be able to trigger all extinguishers manually when seated normally with his safety belts fastened and the steering wheel in place.

Furthermore, a means of triggering from the outside must be combined with the circuit breaker switch.

It must be marked with a letter "E" in red inside a white circle of at least 10cm diameter with a red edge.

14.1.10 - The system must work in any position, even when the car is inverted.

14.1.11 - Extinguisher nozzles must be suitable for the extinguishant and be installed in such a way that they are not directly pointed at the driver.

14.2 Safety belts:

The wearing of two shoulder straps, one abdominal strap and two straps between the legs is compulsory. These straps must comply with FIA standard 8853-85.

14.3 Rear view mirrors:

The car must be fitted with two rear view mirrors, one fitted on each side of the car in order to give an efficient view to the rear. Each mirror must have a minimum area of 100cm².

14.4 Seat and headrest:

14.4.1 - The driver's seat must either be original equipment or a competition seat and mounting frame of adequate strength and proven standard, attached to the original seat mounting points.

14.4.2 - All cars must be equipped with a headrest which cannot deflect more than 5cm when a rearward force of 85daN is applied.

The headrest surface must not be less than 400cm2 and must be continuous and without protruding parts.

It must be positioned so that it is the first point of contact for the driver's helmet in the event of an impact projecting his head backwards when he is seated normally.

14.5 Master switch:

14.5.1 - The driver, when seated normally with the safety belt fastened and the steering wheel in place, must be able to cut off the all electrical circuits by means of a spark proof circuit breaker switch.

This switch must be located on the dashboard and must be clearly marked by a symbol showing a red spark in a white edged blue triangle.

14.5.2 - There must also be an exterior switch, with a handle which is capable of being operated from a distance by a hook. This switch must be located at the lower part of the windscreen pillar on the left hand side.

14.6 Towing eye:

14.6.1 - A towing eye with a minimum and maximum inner diameter of 80mm and 100mm respectively must be securely fitted to the front and rear structures of all cars.

14.6.2 - They must be positioned in such a way that they can be used should the car be stopped in a gravel bed.

14.6.3 - The towing eye must be clearly visible and painted in yellow, red or orange.

ARTICLE 15: SAFETY STRUCTURES

15.1 Magnesium sheet:

The use of magnesium sheet less than 3mm thick is forbidden.

15.2 Rollover structure:

The car must be fitted with a rollcage complying with AppendixJ Article253.8.

Longitudinal struts, or an alternative acceptable to the FIA, providing lateral protection, must be included in both cases.

It is possible to add three lateral protection bars onto a rollbar homologated by the FIA in accordance with drawing 258-3.

15.3 Firewall and floor:

Cars must be equipped with a firewall between the driver and engine to prevent the passage of flames from the engine compartment to the cockpit. Any holes in the firewall must be of the minimum size for the passage of controls and wires and must be completely sealed.

15.4 Crash test:

15.4.1 - The chassis or unitary construction must remain to the manufacturers original specification and material.

No modification, other than those specifically permitted by these regulations, may be introduced into any structure which has been tested.

ARTICLE 16: FUEL

16.1 Fuel specification:

The fuel must be commercial petrol which comes from a service station pump, without any additive other than that of a lubricant on current sale. The fuel must comply with the following specifications:

-102.0RON and 90.0MON maximum, 95.0RON and 85.0MON minimum for unleaded fuel.

-100.0RON and 92.0MON maximum, 97.0RON and 86.0MON maximum for leaded fuel.

The measurements will be made according to the standards ASTMD2699-86 and D 2700-86.

-Specific gravity between 720 and 785kg/m3 at 15°C (measured according to ASTMD4052).

-A maximum of 2.8% oxygen (or 3.7% if the lead content is less than 0.013g/l) and 0.5% nitrogen by weight, the remainder of the fuel consisting exclusively of hydrocarbons and not containing any power-boosting additives.

The measuring of the nitrogen content will be carried out according to the standard ASTMD3228 and that of the oxygen content by elemental analysis with a tolerance of 0.2%.

-Maximum content of peroxides and nitrooxide compounds: 100ppm (ASTMD3703 or in the case of impossibility UOP 33-82).

-Maximum lead content: 0.40g/l or the standard of the country of the event if it is lower (ASTMD3341 or D3237).

-Maximum benzene content: 5% in volume (ASTMD3606).

-Maximum Reid vapour pressure: 900 hPa (ASTMD323).

-Distillation at 70°C: 10% - 47% (ASTMD86).

-Distillation at 100°C: 30% - 70% (ASTMD86).

-Distillation at 180° C: 85% minimum (ASTMD86).

-Maximum final boiling point: 225°C (ASTMD86).

-Maximum residue: 2% volume (ASTMD86).

The fuel will be accepted or rejected according to the standard ASTMD3244 with a confidence limit of 95%.

If the fuel available locally for the event is not of a sufficient quality for use by competitors, the ASN of the organising country must ask the FIA for a waiver in order to enable the use of fuel not corresponding to the characteristics defined above.

16.2 Air:

Only air may be mixed with the fuel as an oxidant.

ARTICLE 17: FINAL TEXT

The final text of these regulations is the English version which will be used should any dispute arise over their interpretation.





APPENDIX 1 : RESTRICTORS




NORMALLY ASPIRATED ENGINES

4 valve engines / 1 restrictor (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm350.351.75354.455.656.958.159.360.5
4000 cm349.650.952.253.554.85657.258.459.6
5000 cm348.750.151.352.653.955.156.257.458.5
6000 cm34849.350.551.85354.255.456.557.6
7000 cm347.248.549.75152.253.354.555.656.7
8000 cm346.347.648.850.151.252.453.554.655.7


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm342.643.844.94647.148.249.250.251.2
4000 cm34243.144.345.346.447.548.549.550.5
5000 cm341.242.443.544.545.646.647.648.649.6
6000 cm340.641.742.843.844.945.946.947.848.8
7000 cm3404142.143.144.245.246.147.148
8000 cm339.240.341.342.343.344.345.346.247.1


4 valve engines / 2 restrictors (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm335.936.937.838.839.740.641.542.343.1
4000 cm335.436.437.338.339.24040.941.842.6
5000 cm334.835.736.637.638.439.340.14141.8
6000 cm334.335.236.13737.938.839.640.441.2
7000 cm333.734.735.536.437.338.138.939.740.5
8000 cm333.13434.835.736.537.438.23939.7


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm330.531.332.232.933.734.535.235.936.7
4000 cm33030.931.732.433.23434.735.436.1
5000 cm329.530.331.131.832.633.33434.735.4
6000 cm32929.830.631.332.132.833.534.234.9
7000 cm328.629.330.130.831.632.33333.734.3
8000 cm328.128.929.630.331.131.832.433.133.8


2 valve engines / 1 restrictor (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm353.655.056.457.959.260.661.963.164.4
4000 cm352.854.255.657.058.459.660.962.263.5
5000 cm351.853.354.656.057.458.759.861.162.3
6000 cm351.152.553.855.256.457.759.060.261.3
7000 cm350.251.652.954.355.656.858.059.260.4
8000 cm349.350.752.053.354.555.857.058.159.3


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm345.346.647.849.050.151.352.453.454.5
4000 cm344.745.947.248.249.450.651.652.753.8
5000 cm343.945.146.347.448.549.650.751.752.8
6000 cm343.244.445.646.647.848.949.950.952.0
7000 cm342.643.644.845.947.148.149.150.151.1
8000 cm341.742.944.045.046.147.248.249.250.1


2 valve engines / 2 restrictors (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm338.239.340.241.342.343.244.245.045.9
4000 cm337.738.739.740.841.742.643.544.545.3
5000 cm337.038.038.940.040.941.842.743.644.5
6000 cm336.537.538.439.440.341.342.143.043.9
7000 cm335.936.937.838.739.740.541.442.343.1
8000 cm335.236.237.038.038.839.840.741.542.3


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm332.433.334.335.035.936.737.538.239.1
4000 cm331.932.933.734.535.336.236.937.738.4
5000 cm331.432.233.133.834.735.436.236.937.7
6000 cm330.831.732.633.334.234.935.636.437.1
7000 cm330.431.232.032.833.634.435.135.936.5
8000 cm329.930.731.532.233.133.834.535.236.0


Rotary valve engines / 1 restrictor (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm355.256.858.259.761.162.563.865.166.5
4000 cm354.555.957.358.860.261.562.864.165.5
5000 cm353.555.056.357.859.260.561.763.064.3
6000 cm352.754.155.556.958.259.560.862.163.3
7000 cm351.853.354.656.057.358.559.961.162.3
8000 cm350.852.353.655.056.257.558.860.061.2


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm346.848.149.350.551.752.954.055.156.2
4000 cm346.147.348.649.750.952.253.354.455.5
5000 cm345.246.547.848.950.151.252.353.454.5
6000 cm344.645.847.048.149.350.451.552.553.6
7000 cm343.945.046.247.348.549.650.651.752.7
8000 cm343.044.245.346.447.548.649.750.751.7


Rotary valve engines / 2 restrictors (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm339.440.541.542.643.644.645.646.447.3
4000 cm338.839.940.942.043.043.944.945.946.8
5000 cm338.239.240.241.342.143.144.045.045.9
6000 cm337.638.639.640.641.642.643.544.345.2
7000 cm337.038.139.039.940.941.842.743.644.5
8000 cm336.337.338.239.240.141.041.942.843.6


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
3500 cm333.534.335.336.137.037.938.639.440.3
4000 cm332.933.934.835.536.437.338.138.839.6
5000 cm332.433.234.134.935.836.537.338.138.8
6000 cm331.832.733.634.335.236.036.837.538.3
7000 cm331.432.133.033.834.735.436.237.037.6
8000 cm330.831.732.533.234.134.935.536.337.1



TURBOCHARGED ENGINES

4 valve engines / 1 restrictor (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm348.649.75152.453.654.956.157.358.5
2400 cm34849.350.651.853.154.355.656.758
2800 cm347.648.75051.252.553.85556.157.4
3200 cm347.148.349.650.852.153.354.555.757
3600 cm346.647.84950.351.552.853.955.256.4
4000 cm346.147.348.649.75152.253.354.655.9


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm341.94344.145.146.247.248.249.150.1
2400 cm341.542.643.744.745.846.847.848.749.7
2800 cm341.142.243.344.345.446.447.448.349.3
3200 cm340.741.842.943.945464747.948.9
3600 cm340.341.442.543.544.645.646.647.548.5
4000 cm339.94142.143.144.245.246.247.148.1


4 valve engines / 2 restrictors (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm334.835.536.537.538.439.340.24141.9
2400 cm334.435.336.237.13838.939.840.641.5
2800 cm334.134.935.836.737.638.539.440.241.1
3200 cm333.734.635.536.437.338.23939.940.8
3600 cm333.434.235.13636.937.838.639.540.4
4000 cm33333.934.635.636.53738.239.140


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm330.431.232.232.733.634.335.235.936.5
2400 cm329.930.931.732.433.233.934.735.436.1
2800 cm329.530.431.231.932.633.434.234.835.6
3200 cm329.13030.831.532.33333.834.435.1
3600 cm328.829.630.431.131.932.633.33434.7
4000 cm328.429.33030.731.532.132.933.634.3


2 valve engines / 1 restrictor (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm351.752.954.355.857.158.559.761.062.3
2400 cm351.152.553.955.256.557.859.260.461.8
2800 cm350.751.853.254.555.957.358.659.761.1
3200 cm350.151.452.854.155.556.858.059.360.7
3600 cm349.650.952.253.654.856.257.458.860.1
4000 cm349.150.451.752.954.355.656.858.159.5


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm344.645.846.948.049.250.251.352.353.3
2400 cm344.245.346.547.648.849.850.951.852.9
2800 cm343.744.946.147.248.349.450.551.452.5
3200 cm343.344.545.746.747.949.050.051.052.1
3600 cm342.944.145.246.347.548.549.650.651.6
4000 cm342.543.644.845.947.148.149.250.151.2


2 valve engines / 2 restrictors (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm337.037.838.839.940.941.842.843.644.6
2400 cm336.637.638.539.540.441.442.443.244.2
2800 cm336.337.138.139.140.041.041.942.843.7
3200 cm335.936.837.838.739.740.741.542.543.4
3600 cm335.536.437.438.339.340.241.142.043.0
4000 cm335.136.136.837.938.839.440.741.642.6


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm332.333.234.334.835.836.537.538.238.8
2400 cm331.832.933.734.535.336.136.937.738.4
2800 cm331.432.333.233.934.735.536.437.037.9
3200 cm331.031.932.833.534.435.136.036.637.4
3600 cm330.631.532.333.133.934.735.436.236.9
4000 cm330.231.231.932.733.534.235.035.836.5


Rotary valve engines / 1 restrictor (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm353.454.656.057.558.960.361.662.964.3
2400 cm352.754.155.656.958.359.661.162.363.7
2800 cm352.353.554.956.257.759.160.461.663.0
3200 cm351.753.054.555.857.258.559.961.262.6
3600 cm351.252.553.855.256.658.059.260.661.9
4000 cm350.651.953.454.656.057.358.560.061.4


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm346.047.248.449.550.751.852.953.955.0
2400 cm345.646.848.049.150.351.452.553.554.6
2800 cm345.146.347.548.649.850.952.053.054.1
3200 cm344.745.947.148.249.450.551.652.653.7
3600 cm344.245.446.747.849.050.151.252.253.3
4000 cm343.845.046.247.348.549.650.751.752.8


Rotary valve engines / 2 restrictors (mm)

GT1
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm338.239.040.141.242.143.144.145.046.0
2400 cm337.738.739.740.741.742.743.744.645.6
2800 cm337.438.339.340.341.342.343.244.145.1
3200 cm337.038.039.039.940.941.942.843.844.8
3600 cm336.637.538.539.540.541.542.443.444.3
4000 cm336.237.238.039.140.140.641.942.943.9


GT2
CYL / PDS900/949 kg950/999 kg1000/1049 kg1050/1099 kg1100/1149 kg1150/1199 kg1200/1249kg1250/1299kg1300kg et plus
2000 cm333.334.235.335.936.937.638.639.440.1
2400 cm332.833.934.835.536.437.238.138.839.6
2800 cm332.433.334.235.035.836.637.538.239.1
3200 cm331.932.933.834.635.436.237.137.738.5
3600 cm331.632.533.334.135.035.836.537.338.1
4000 cm331.132.132.933.734.635.236.136.937.6