5th Category – Historic Cars
Group Na is designed to provide a forum for competitors to race both pre-war production touring cars and early post-war production touring cars in a form similar to racing of the period. To this extent, the modifications permitted are those that are not intended to radically alter the individual vehicle’s character or appearance and will be of an improved performance road car nature, as opposed to making the vehicle totally dedicated to outright competition; the concept being that the vehicles could be driven comfortably to and from the race meeting.
Limited modifications may be made. These should be of a period nature and not out of character with the vehicle or group period. People wishing to race vehicles of a more highly modified nature should look to other categories, such as Group Nb or an appropriate contemporary class. It is envisaged that most vehicles in this class will not have a racing history and these are acceptable provided they conform to the Group Na Specific Regulations and the relevant CAMS Specification Sheet.25
Specific requirements additional to the General Requirements:
(a) Classes:
Vehicles shall compete in the following capacity classes:
Class Capacity
Class A 3001cc and over
Class B 1501 – 3000cc
Class C 1101 – 1500cc
Class D Up to 1100cc
Engine configuration: the bore may be increased by a maximum of 1.5mm, and the stroke must remain standard as specified for the make and model.
(b) Ignition:
Electronic or transistorised systems are not permitted.
A distributor of a different make but similar design is permitted, but must use the points and condenser components within.
(c) Final drive:
Limited slip or locked differentials are not permitted unless part of the original specification.26
(d) Suspension:
The method of suspension originally employed by the manufacturer must be retained.
Each front suspension pickup point may be moved laterally by up to 10mm provided that a maximum of two degrees negative camber is not exceeded.
Eccentric or modified suspension components that alter the dimensions or geometry from original specifications, other than as provided for in this regulation are not permitted.
Shock absorbers/Springs: Spring rates and height (and therefore the ride height) may be altered.
Damper settings may also be altered; however, externally adjustable shock absorbers are not permitted.
Sway bars: Fitment of period-type anti-sway bar to the front suspension is permitted. Rear sway bars are not permitted unless originally fitted.
Originally fitted sway bars may be replaced by another of alternate dimensions, but must remain mounted by the original method. Bushing materials are free.
Fore and aft axle location may be altered, and locating devices to achieve this may be installed.
Transverse axle location devices may not be fitted.
The steering system employed for the model in question by the original manufacturer must be utilised.
At all times, the original form of steering and suspension joints must be employed.
Elastomeric bushings may be replaced by another, as defined by 5th Category Group N: Vehicle
Eligibility: General regulations. Elastomeric bushings may not be replaced by spherical or “Rose”-type joints.
Externally adjustable shock absorbers are not permitted.27
(e) Clutch:
original method of operation must be utilised, eg, cable or hydraulic.
(f) Wheels:
The wheels shall be either as supplied by the manufacturer or of a type approved by CAMS and which is in harmony with wheels used prior to 31 December, 1958. At all times the original wheel diameter shall be maintained, save that all cars originally fitted with 14″ diameter wheels may use replacement 15″ diameter wheels. The width of the rim may not exceed 5″ unless originally specified by the manufacturer; in which case the rim width must be as originally supplied. Aluminum alloy type wheels may be fitted, but only of a design and style available prior to 31 December, 1958. 4″ Pitch Circle Diameter (PCD) hubs may be modified or replaced for the purpose of accepting 100mm PCD wheels. Any replacement hubs must be of ferrous material. Vehicles fitted with hubs that have a PCD other than 4″ will be considered upon application. Wheel studs are free. Wheel nave plates or covers must be removed.
(g) Tyres:
Tyres must have an aspect ratio of at least 65% as determined by the Tyre and Rim Association manual. (Refer Na, Nb, Nc, Sa, Sb and Sc Tyre List – article 1.2(a).)
The upper part of the tyre, down to the wheel rim flange over the wheel hub centre must be within the perimeter of the vehicle when viewed vertically from above (refer diagram 1).28
Group Nb is intended to be representative of the prescriptions of the former Appendix J which was current until 31 December, 1964. Before the introduction of the current sub-groups, this category was known as “Group N”. This is a group for series production type touring cars, manufactured prior to 31 December, 1964. The group recognises models or components homologated for competition by the manufacturer, however at least 100 identical examples of a particular model must have been produced for the vehicle to be eligible.
Spirit of Regulations: It is envisaged that most vehicles in this class will not have a racing history and these are acceptable provided they conform to the Group Nb Specific Regulations and the relevant CAMS Specification Sheet. Spirit of regulations: It is emphasised that the purpose of this category of racing is to emulate, as far as is practicable, racing of touring cars under Appendix J regulations which were current until 31 December, 1964. Under the spirit of these regulations, and with the obvious exception of current safety requirements which were not mandatory in the period, over-restoration of vehicles, including the use of technology, parts or equipment not available within the period in question, are not acceptable and will render the vehicle ineligible.29
Specific requirements additional to the General Requirements:
(a) Classes:
Vehicles shall compete in the following engine capacity classes
Class Capacity Class Capacity
Class A1 Over 4500cc Class D 1601 to 2000cc
Class A2 3001 to 4500cc Class E 1301 to 1600cc
Class B 2601 to 3000cc Class F 1001 to 1300cc
Class C 2001 to 2600cc Class G Up to 1000cc
(Classes may be amalgamated)
Vehicles in the above-mentioned Classes A, B, C, D, and E must have four doors unless they have been homologated by the FIA, or are otherwise specifically approved by CAMS, in a two-door version. Vehicles in Classes F and G must have at least two doors.30
(b) Engine:
The bore may be varied and/or the stroke reduced provided that the swept volume of the engine remains within the same cubic capacity class as that within which the engine came as supplied by the manufacturer. But in cases where retaining the original stroke and increasing the cylinder bore by up to 1.5mm over the original dimension increases the engine cubic capacity above the original class limit, for competition purposes the vehicle will remain within its original cubic capacity class.
(c) Ignition:
May be of the same type, but not necessarily brand as supplied by the manufacturer for the make and model concerned. Contact breaker points and condenser may be removed and their standard operations performed by electronic components providing the following conditions are adhered to:
- all components, save for the coil, shall be an integral part of the distributor.
- A maximum of two wires shall connect the low tension side of the distributor to the coil. These wires shall be visibly continuous and not contain any supplementary connection to any other component. Permitted is the fitment of an uninsulated earthing conductor between distributor body and cylinder block.
- Ignition advance shall be restricted to mechanical actuation within the distributor.31
(d) Transmission:
The clutch and its method of actuation are free; save that concentric throwout bearings are not permitted.
(e) Final drive:
Differentials may be modified internally to incorporate slip limiting or locking devices. Modifications to incorporate floating hubs are permitted.
(f) Suspension:
The original form and type of suspension only shall be employed (eg, a semi-elliptic leaf spring suspended live rear axle may not be replaced by a coil spring suspended De Dion type, and so on).
Springs are free provided that the type and location are unchanged. Adjustable ride height is permitted, save that the body may not be altered to incorporate any system facilitating the adjustment of the ride height. MacPherson struts may be modified to incorporate adjustable spring seats/platforms.
Shock absorbers are free, save that they may not utilise external gas/fluid reservoirs and/or canisters.
From April 21 2014 a maximum of 5° static negative camber is permitted for wheels on the front axle.
Sway bars: Sway bars may be fitted or removed from the front or rear of vehicles provided the sway bar does not perform any other function. Such sway bars must be of a conventional type, ie, made of a solid steel bar bent to shape. The diameter of the sway bar is free. Hollow sway bars are not permitted.
The method of mounting is free. The end links on bars may incorporate the use of spherical or rose type joints. Sway bars that perform more than one function can only be varied in diameter.
Locating devices/attachment: Suspension pickup points may be moved by up to 30mm.32
Additional control arms may be fitted front and rear but in doing so, the original components must remain functional. The method of mounting is free, including the use of spherical or rose-type joints, providing all such control arms remain outside the original bodywork.
Where a vehicle is fitted with a Panhard rod as standard equipment, its mounting points may be moved without restriction, or it may be removed and replaced with a Watts linkage. Spherical rod ends may be employed in either application.
(g) Brakes:
It is permitted to fit alternative calipers of a type available pre-1965. Drum brake systems may have components replaced with those of a production vehicle of the period provided the swept area and diameter of the drum does not change. Non-standard pedal boxes are permitted provided
the original pedal location & configuration is maintained ie; where the pedals are pendulum or floor mounted they must retain this configuration. Brake hoses are free. Drum brakes may be drilled for the purpose of cooling, but such holes may not be drilled in the swept braking surface of the drum.
The replacement of original disc rotor assemblies with those of two or three-piece construction of a similar appearance is permitted. Original hubs must be retained, machining is permitted. Any adaptor between hub and disc rotor must be solid and be of aluminium or steel.
The use of adaptor plates for the attachment of brake calipers or intermediate spacers within brake calipers to accommodate variations in rotor and brake pad thickness is permitted.
(h) Wheels and tyres:
The wheels shall be either as supplied by the manufacturer or of a type approved by CAMS and which is in harmony with wheels used prior to 31 December, 1964. At all times the original wheel diameter shall be maintained, save that all cars originally fitted with 14” diameter wheels may use replacement 15” diameter wheels. The width of the rim may be increased by not more than 1” over that originally fitted to the particular make and model, subject to an absolute maximum width of 6”. Aluminium alloy type wheels may be fitted, but only of a design and style available prior to 31 December, 1964. Wheel nave plates or covers must be removed.
Tyres: Tyres must be of an approved type of radial or cross-ply construction with a minimum aspect ratio of 60% as determined by the Tyre and Rim Association. (Refer Na, Nb, Nc, Sa, Sb and Sc Tyre List, article 1.2(b).) Re-grooving of tyres is not permitted.
The upper part of the tyre, down to the wheel rim flange over the wheel hub centre must be within the perimeter of the vehicle when viewed vertically from above. (Refer diagram 1 – Group Na.)33
Group Nc is an historic group introduced on 1 January, 1995, to cater primarily for vehicles of a year, make and model which competed in Australia between 1 January, 1965, and 31 December, 1972 in either the Australian Touring Car Championship or races specifically for 3rd Category Group C Improved Production Touring Cars and Series Production Touring Cars.
The Group Nc rules have been established to enable competition under a common set of rules which reflect the nature of touring car racing in the period.
The Historic Production Based Eligibility Committee, HPBEC, at its sole discretion, shall determine the contents of the vehicle Specification Sheets, which will be based on data sourced from:
The relevant FIA homologation and CAMS vehicle recognition documents (for over 3 litre cars, up to page 12), factory (not dealer) fitted parts lists and factory workshop and parts manuals.
All vehicles must continue to comply with the Specification Sheet for the model in question. CAMS reserves the right to alter Specification Sheets at any time, if new or different information becomes available.
It is envisaged that most vehicles in this class will not have a racing history and these are acceptable provided they conform to the Group Nc Specific Regulations and the relevant CAMS Specification Sheet.
Spirit of Regulations: It is emphasised that the purpose of this category is to emulate, as far as practicable, the racing of touring cars (as described in the preamble) in the period from 1 January, 1965 to 31 December, 1972. Under the spirit of the regulations, and with the obvious exception of current safety requirements which were not mandatory in the period, over restoration of vehicles, including the use of technology, parts or equipment other than consumable items, not available within the period in question, are not acceptable.34
Specific requirements additional to the General Requirements:
(a) Classes:
Vehicles shall compete in the following capacity classes:
Class Capacity
Class A Over 5100cc
Class B 3501cc – 5100cc
Class C 3001cc – 3500cc
Class D 2001cc – 3000cc
Class E 1501cc – 2000cc
Class F 1101cc – 1500cc
Class G Up to 1100cc
(b) Bodywork:
Mudguard flares/extensions – flares and/or extensions to the guards are not permitted unless originally fitted to the make and model in question by the manufacturer. The inner lip of the wheel opening may be folded back for tyre clearance.35
(c) Engine:
(i) Reciprocating engines: The bore may be increased by a maximum of 1.5mm, and the stroke must remain standard as specified for the make and model.
Where increasing the bore size up to 1.5mm increases the engine cubic capacity above the original capacity class limit, for competition purposes the vehicle will remain within its original cubic capacity class. Toothed belts driving engine ancillaries are permitted. Engine pulleys are free.
(ii) Rotary engines: Rotary engines shall be deemed to be engines with rotary (rather than reciprocating) motion of the compressing medium (Wankel type). A rotary engine shall be defined as the rotor housings, intermediate and end plates.
Modifications: The rotors, apex seals and crankshaft are free. Modifications to rotary engine rotor, housings and end plates may be effected only by the removal of metal. Rotary engines may be modified by the utilisation of the porting technique/s known as “Extend”, “Mild” or “Bridge” porting.
Mild/extend porting shall be defined as a single induction port per end/intermediate plate, per rotor, extended beyond the original induction port size and shape. Save that it may not extend beyond the region traversed by the original rotor seal, the size and shape of such a port is free.
“Bridge” porting is permitted with the restriction that the original O-ring seals must remain unmodified and in their original location.
Bridge porting shall be defined as where the induction is accomplished utilising two separate induction ports per end/intermediate plate, per rotor, but not extending beyond the original outer edge of the inner water seal.
Peripheral porting is specifically not permitted.36
Peripheral porting is defined as a port on a rotary engine allowing the passage of gasses through the periphery of the rotor housing. Any bridged induction port that is extended radially beyond the original outer edge of the inner water seal is, for the purposes of these regulations, considered to be a peripheral port.
Engines must be sealed, with rotor housing and end plates as a complete assembly.
Toothed belts driving engine ancillaries are permitted. Engine pulleys are free.37
Group Nc is an historic group introduced on 1 January, 1995, to cater primarily for vehicles of a year, make and model which competed in Australia between 1 January, 1965, and 31 December, 1972 in either the Australian Touring Car Championship or races specifically for 3rd Category Group C Improved Production Touring Cars and Series Production Touring Cars.
The Group Nc rules have been established to enable competition under a common set of rules which reflect the nature of touring car racing in the period.
The Historic Production Based Eligibility Committee, HPBEC, at its sole discretion, shall determine the contents of the vehicle Specification Sheets, which will be based on data sourced from: The relevant FIA homologation and CAMS vehicle recognition documents (for over 3 litre cars, up to page 12), factory (not dealer) fitted parts lists and factory workshop and parts manuals.
All vehicles must continue to comply with the Specification Sheet for the model in question. CAMS reserves the right to alter Specification Sheets at any time, if new or different information becomes available. It is envisaged that most vehicles in this class will not have a racing history and these are acceptable provided they conform to the Group Nc Specific Regulations and the relevant CAMS Specification Sheet.
Spirit of Regulations: It is emphasised that the purpose of this category is to emulate, as far as practicable, the racing of touring cars (as described in the preamble) in the period from 1 January, 1965 to 31 December, 1972. Under the spirit of the regulations, and with the obvious exception of current safety requirements which were not mandatory in the period, over restoration of vehicles, including the use of technology.38
Specific requirements additional to the General Requirements: (a) Classes: Vehicles shall compete in the following capacity classes:
Class Capacity
Class A Over 5100cc
Class B 3501cc – 5100cc
Class C 3001cc – 3500cc
Class D 2001cc – 3000cc
Class E 1501cc – 2000cc
Class F 1101cc – 1500cc
Class G Up to 1100cc
(b) Bodywork: Mudguard flares/extensions – flares and/or extensions to the guards are not permitted unless originally fitted to the make and model in question by the manufacturer. The inner lip of the wheel opening may be folded back for tyre clearance.39
(d) Ignition:
May be of the same type, but not necessarily brand as supplied by the manufacturer for the make and model concerned. Contact breaker points and condenser may be removed and their standard operations performed by electronic components providing the following conditions are adhered to:
(i) All components, save for the coil, shall be an integral part of the distributor.
(ii) A maximum of two wires shall connect the low tension side of the distributor to the coil. These wires shall be visibly continuous and not contain any supplementary connection to any other component. Permitted is the fitment of an uninsulated earthing conductor between distributor body and cylinder block.
(iii) Ignition advance shall be restricted to mechanical actuation within the distributor.40
(e) Transmission:
The clutch and its method of actuation are free.
(f) Final drive:
Differentials may be modified internally to incorporate slip limiting or locking devices.
Modifications to incorporate floating hubs are permitted.
(g) Suspension:
The original form and type of suspension only shall be employed (eg, a semi-elliptic leaf spring suspended live rear axle may not be replaced by a coil spring suspended De Dion type, and so on).
Springs are free provided that the type and location are unchanged. Adjustable ride height is permitted, save that the body may not be altered to incorporate any system facilitating the adjustment of the ride height. MacPherson struts may be modified to incorporate adjustable Shock absorbers are free, save that they may not utilise external gas/fluid reservoirs and/or canisters. From April 21 2014 a maximum of 5° static negative camber is permitted for wheels on the front axle.
Sway bars: Sway bars may be fitted or removed from the front or rear of vehicles provided the sway bar does not perform any other function. Such sway bars must be of a conventional type, ie, made of a solid steel bar bent to shape. The diameter of the sway bar is free. Hollow sway bars are not permitted. The method of mounting is free. The end links on bars may incorporate the use of spherical or rose type joints. Sway bars that perform more than one function can only be varied in diameter.
Locating devices/attachment: Suspension pickup points may be moved by up to 30mm.
Additional control arms may be fitted front and rear but in doing so, the original components must remain functional. The method of mounting is free, including the use of spherical or rose-type joints, providing all such control arms remain outside the original bodywork. Where a vehicle is fitted with a Panhard rod as standard equipment, its mounting points may be moved without restriction, or it may be removed and replaced with a Watts linkage. Spherical rod ends may be employed in either application.41
(h) Brakes:
Components may be replaced with those from another make and model of production touring car that was produced before 31 December 1972, provided there is no increase in the swept area or diameter of the disc or drum. Machining of the rotor is permitted.
The replacement of original disc rotor assemblies with those of two or three-piece construction of a similar appearance is permitted. Original hubs must be retained, machining is permitted. Any adaptor between hub and disc rotor must be solid and be of aluminum or steel.
The use of adaptor plates for the attachment of brake calipers or intermediate spacers within brake calipers to accommodate variations in rotor and brake pad thickness is permitted.
Non-standard pedal boxes are permitted provided the original pedal location & configuration is maintained ie; where the pedals are pendulum or floor mounted they must retain this configuration. It is not permitted for brake bias to be adjustable by the driver when in the normal driving position.
Brake hoses are free.
It is permissible to replace brake discs with items that are wider than the original component. Discs replaced under this provision may incorporate ventilation between the braking surfaces.
Brake discs may not be grooved or drilled.
Drum brakes may be drilled for the purpose of cooling, but such holes may not be drilled in the swept braking surface of the drum.
Brake cooling ducts may be fitted. If brake cooling ducts or scoops are fitted, they must be separated by a minimum of 300mm, so as not to form an aerodynamic aid and their sole function shall be to assist in the supply of air to the brakes.42
(i) Wheels: Wheel diameter must be as originally supplied by the manufacturer or that which was deemed by CAMS to have been commonly used on the model in competition during the period as outlined in the vehicle’s Specification Sheet save that all cars originally fitted with 14” diameter wheels may use replacement 15” diameter wheels.
Wheels may be replaced by period style alloy wheels.43
Maximum rim width permitted is:
Class Maximum permitted rim width
Class A and B Maximum 8 inches
Class C, D and E Maximum 7 inches
Class F and G Maximum 6 inches
Wheel nave plates or covers must be removed.
(j) Tyres:
Tyres must be of approved type radial or cross-ply construction with a minimum aspect ratio of 60% as determined by the Tyre and Rim Association. (Refer Na, Nb, Nc, Sa, Sb and Sc tyre list – article 1.2(b).) Re-grooving of tyres is not permitted.
The upper part of the tyre, down to the wheel rim flange over the wheel hub centre must be within the perimeter of the vehicle when viewed vertically from above. (Refer diagram 1 – Group Na.)44
| Alfa Romeo GTAM 105 – Nc | Open |
| Alfa Romeo GTV2000 105S – Nc | Open |
| Austin 1800 – Nb | Open |
| Austin A30 A35 Na | Open |
| Austin A90 95 105 Na | Open |
| BMW 1600 1602 Nc | Open |
| BMW 2002 – Nc | Open |
| Camaro 67 350 Nc | Open |
| Camaro 68 SS 350 Nc | Open |
| Camaro 68 SS 396 Nc | Open |
| Camaro 69 SS 350 Nc | Open |
| Chevy II Nova 1964 – Nb | Open |
| Chevy II Nova Super Sports Coupe 1966 – Nc | Open |
| Chevy II Nova Super Sports Coupe 1967 – Nc | Open |
| Chevy Nova 1966 II Super Sports Coupe – Nc | Open |
| Datsun 1600 Nc | Open |
| Ford Anglia – Nb | Open |
| Ford Capri V6 30 Nc | Open |
| Ford Cortina 220 – Nc | Open |
| Ford Cortina 240 440 – Nb | Open |
| Ford Cortina GT Mk 1 – Nb | Open |
| Ford Cortina GT Mk II – Nc | Open |
| Ford Escort Mk1 1300 and 1300GT – Nc | Open |
| Ford Escort RS1600 – Nc | Open |
| Ford Escort Twin-Cam Nc | Open |
| Ford Falcon Rally Sprint – Nb | Open |
| Ford Falcon XM – Nb | Open |
| Ford Falcon XW GT – Nc | Open |
| Ford Falcon XY – Nc | Open |
| Ford Galaxie R – Nc | Open |
| Ford Lotus Cortina Mk1 – Nb | Open |
| Ford Lotus Cortina Mk2 – Nc | Open |
| Ford Mustang 64 65 – Nb/Nc | Open |
| Ford Mustang 66 – Nc | Open |
| Ford Mustang 67 – Nc | Open |
| Ford Mustang 68 – Nc | Open |
| Ford Mustang 68 69 Boss 302 | Open |
| Ford Mustang Fastback 351 – Nc | Open |
| Ford Zephyr Mk2 – Na | Open |
| HG GTS 350 Coupe – Nc | Open |
| Hillman Imp Mk 2 – Nc | Open |
| Hillman Imp Mk.1 – Nb | Open |
| HK GTS 327 Coupe – Nc | Open |
| Holden EH – Nb | Open |
| Holden FX FJ Na | Open |
| Holden HG GTS 350 Coupe – Nc | Open |
| Holden HK GTS 327 Coupe – Nc | Open |
| Holden HQ GTS 350 – Nc | Open |
| Holden HR – Nc | Open |
| Holden HT GTS 350 Coupe – Nc | Open |
| Holden Torana XU1 LC – Nc | Open |
| Holden Torana XU1 LJ – Nc | Open |
| Honda 7S 9S Coupe H1300C Nc | Open |
| HQ GTS 350 – Nc | Open |
| Holden HQ Kingswood 308 – Nc | Open |
| HT GTS 350 Coupe – Nc | Open |
| Jaguar Mk 1 – Na | Open |
| Jaguar Mk 7 Mk 8 Mk 9 – Na | Open |
| Mazda 1300 – Nc | Open |
| Mazda R100 – Nc | Open |
| Mazda RX2 – Nc | Open |
| Mercury Comet Caliente – Nb | Open |
| Mini Clubman GT – Nc | Open |
| Mini Cooper S – Mk1 – Nb | Open |
| Morris Cooper S – Nc | Open |
| Morris Oxford – Na | Open |
| Plymouth Valiant – Nb | Open |
| Porsche 911s rally-nc | Open |
| Porsche 911s-nc | Open |
| Renault R8 Gordini – Nc | Open |
| Simca Aronde – Na | Open |
| Studebaker Lark Daytona Nb | Open |
| Toyota Corolla KE11 – Nc | Open |
| Toyota Corolla KE17 – Nc | Open |
| Toyota Corolla KE20 – Nc | Open |
| Triumph 2000 Mk1 – Nb | Open |
| Triumph Mk2 PI – Nc | Open |
| Valiant Charger E38 – Nc | Open |
| Valiant Charger E49 – Nc | Open |
| Valiant Pacer – Nc | Open |
| Volkswagen 1200 Sedan – Na | Open |
| Volvo 122 – Na Nb Nc | Open |
| Volvo 140 – Nc | Open |
| Volvo 164 – Nc | Open |
This group will cater for vehicles with a competition history established in the period ending 31 December 1965 in events run to CAMS regulations for Appendix J Touring Cars.
Eligible vehicles:
(a) Only an actual vehicle from the defined period will be recognised.
(b) A clear line of history is required for each eligible vehicle. The applicant for a Certificate of Description and Log Book must, with the application, provide all evidence reasonably necessary to establish a clear line of history for the vehicle.
(c) Other than in respect of variations permitted in terms of these regulations, each vehicle must be presented in the same specification as noted in the relevant homologation/recognition document as it was presented for competition at an event (the “Specified Competition Event”) during a year in which the vehicle competed as an Appendix J Touring Car in the period (the “Specification Year”).
(d) It is not permitted to construct a new vehicle. A vehicle reconstructed using only spares or damaged and cast-off components are not eligible for this group. A chassis/body may, but does not necessarily, constitute an eligible vehicle.
(e) Tyres: Each tyre must have an aspect ratio of at least 60% as determined by the Tyre and Rim Association manual. Tyres must be a cross ply treaded tyre and will be approved on individual application. The use of non R Spec radial road tyres may be approved on individual application. Regrooving of tyres is not permitted.
This group will cater for vehicles with a competition history established in the period between 1 January 1966 and 31 December 1972 in events run to CAMS regulations for Improved Production Touring Cars.
Eligible Vehicles
(a) Only an actual vehicle, for which a Log Book was/is issued by CAMS, will be recognised.
(b) A clear line of history is required for each eligible vehicle. The applicant for a Certificate of Description and Log Book must, with the application, provide all evidence reasonably necessary to establish a clear line of history for the vehicle.
(c) Other than in respect of variations permitted in terms of these regulations, each vehicle must be presented in the same specification as noted in the relevant homologation/recognition document as it was presented for competition at an event (the “Specified Competition Event”) during a year in which the vehicle competed an Improved Production Touring Car in the period (the “Specification Year”).
(d) It is not permitted to construct a new vehicle. A vehicle reconstructed using only spares or damaged and cast-off components are not eligible for this group. A chassis/body may, but does not necessarily, constitute an eligible vehicle.
(e) Tyres: Each tyre must have an aspect ratio of at least 60% as determined by the Tyre and Rim Association manual. Tyres must be a cross ply treaded tyre and will be approved on individual application. The use of non R Spec radial road tyres may be approved on individual application. Regrooving of tyres is not permitted.
Vehicle Eligibility Group N and S
1. EQUIPMENT STANDARDS AND GUIDELINES
1.1 APPROVED TYRE LIST – GROUPS Na, Nb, Nc, Sa, Sb and Sc
This approved tyre list relates to tyre characteristics applying at the date of publication. If a tyre manufacturer makes changes to an approved tyre (particularly in respect of aspect ratio, tyre pattern or compound), this will normally result in the approved status of the tyre lapsing. Any historic racing tyre, street-legal tyre, treaded race tyre or standard road tyre that meets these guidelines may be included on the list after application and approval. Slicks and tyres that are designed to have minimal tread pattern after limited use are not acceptable.
The Approved Tyre List will be maintained by CAMS and may be updated by the Historic Production Based Eligibility Committee. Consult the CAMS National Office or the CAMS website to obtain the current list of tyres and section sizes. 55
1.2 ELIGIBILITY
(a) For Group Na the minimum aspect ratio permitted is nominally 65%.
(b) For Groups Nb, Nc, Sa and Sb the minimum aspect ratio permitted is nominally 60%.
(c) For Group Sc the minimum aspect ratio permitted is nominally 60% unless the vehicle in question was originally fitted with tyres of a lower aspect ratio by the manufacturer, in which case this shall be the minimum permitted aspect ratio.
(d) Dedicated ‘rain tyres’ or ‘wet compound’ tyres are not acceptable for Group S.
(e) Tyres may not be fitted to rims wider than recommended by the tyre manufacturer as per Schedule E, section 2 – Tyres.
(f) An application to add a new tyre to the approved list must be made to the HPBEC and shall include the following information:
(i) Manufacturer’s information sheets showing tyre make and model identification. (ii) Tyre dimensions (overall diameter, section width and recommended rim widths). (iii) Illustrations of the tread pattern.
(iv) Section sizes available in the model range.
(v) Where the tyre is produced in multiple compounds the range and the method of identification must be provided.
(vi) Any other relevant information that would be required in identifying the tyre at an eligibility check.
(g) The ongoing supply of specific tyre types and sizes will be essential in order for a tyre to remain on the tyre list, which will be reviewed regularly. Include indications of the likely availability of tyres in the short-to-medium term.56
65% ASPECT RATIO INFORMATION
Group Na
| Make | Model |
|---|---|
| Avon |
CR6ZZ CR28 |
| Yokahama |
AO32R |
| Hoosier |
Vintage TD |
|
Speedster |
|
| Dunlop |
D83J |
|
CR48 (R6) |
|
|
CR65 |
|
|
R5 |
|
| Pirelli |
P6 |
| P600 |
| Make | Model | Size Imperial | Size Metric | Approved Rim Size in” |
|---|---|---|---|---|
| American Racer | M28 |
18.0/6.0-10 |
165/70×10 |
5.0-6.0 |
|
Pass Perf DOT |
|
215/60D13 |
6.0-7.0 |
|
|
Pass Perf DOT |
235/60D13 |
7.0-8.0 |
||
|
KK-704TM |
L60-
|
245/60-15 |
7.0-8.0 |
|
|
KK-704TM |
L60- |
15 275/60-15 |
7.0-8.0 |
|
|
Pass Perf DOT |
265/60D15 |
7.0-9.0 |
||
|
Pass Perf DOT |
285/60D15 |
8.0-10.0 |
||
|
Pass Perf DOT |
305/60D15 |
10.0 |
||
| Avon |
CR6ZZ |
165/70R10 |
5.0-6.0 |
|
|
215/60R15 |
6.0-7.5 |
|||
|
225/60R15 |
6.0-8.0 |
|||
|
246/60R15 |
7.0-11.0 |
|||
|
CR28 |
185/60R13 |
5.0-6.5 |
||
|
205/60R13 |
5.5-7.5 |
|||
|
185/60R14 |
5.0-6.5 |
|||
|
ACB9 |
185/60-13 |
5.0-6.5 |
||
|
215/60-13 |
5.5-6.5 |
|||
| Bridgestone |
RE11S |
185/60R14 |
5.0-6.5 |
|
|
195/60R14 |
5.5-7.0 |
|||
|
205/60R15 |
6.5-7.5 |
|||
|
RE55S |
185/60R14 |
5.0-6.5 |
||
|
195/60R14 |
5.5-7.0 |
|||
|
205/60R15 |
5.5-7.5 |
|||
| Dunlop |
D01J |
205/60R15 |
5.5-7.5 |
|
|
DZ03G |
175/60R13 |
5.0-6.0 |
||
|
185/60R14 |
5.0-6.5 |
|||
|
195/60R14 |
5.5-7.0 |
|||
|
D84J |
185/60R13 |
5.0-6.0 |
||
|
185/60R14 |
5.0-6.5 |
|||
|
195/60R14 |
5.5-7.0 |
|||
|
205/60R15 |
5.5-7.5 |
|||
|
D94J |
165/70R10 |
3.0-5.0 |
||
|
CR311 |
165-13 |
5.0-7.0 |
||
|
D93J |
||||
|
CR48 (R6) |
||||
|
DZ02G |
||||
|
DZ03G |
205/50R16 |
6.0-8.0 |
||
|
225/50R16 |
6.0- 9.0 |
|||
|
Direzza Sport Z1 |
195/60R14 |
5.5-7.0 |
||
|
205/60R15 |
5.5-7.5 |
|||
|
Direzza Sport Z2 |
175/60R14 |
5.0-6.0 |
||
|
185/60R14 |
5.0-6.5 |
|||
|
205/55R16 |
5.5-8.0 |
|||
|
225/50R16 |
6.0-9.0 |
|||
| Goodyear Blue Streak |
G-12A |
5.00-15 |
5.0 | |
|
G-7 |
5.50-15 |
6.0 |
||
|
G-7 |
6.00-15 |
8.0 |
||
|
G-7 |
7.00-15 |
9.0 |
||
|
G-7 |
8.00-15 |
10.0 |
||
|
G-15A |
26.5×8.0-15 |
8.0 |
||
|
G-15A |
26.5×10.0-15 |
10.0 |
||
|
Hoosier |
44286 |
25.5×8.5-15 |
8.0-10.0 |
|
|
44306 |
8.0-10.0 |
|||
|
44308 |
8.0-10.0 |
|||
|
44651 |
225/60R15 |
7.0-8.0 |
||
|
Sports Car DOT Bias |
45100 |
185/60D13 |
5.5-7.0 |
|
|
45120 |
185/60D13 |
6.0-8.0 |
||
|
45180 |
205/60D14 |
7.0-9.0 |
||
|
45190 |
225/60D15 |
7.0-9.5 |
||
|
45200 |
275/60D15 |
8.5-10.0 |
||
|
Vintage&Hist. TD (stiff sidewall) |
44391 |
19.0×5.0-10 |
5.0-6.0 |
|
|
45105 |
A70-13 |
5.0-7.0 |
||
| Speedster |
46015 |
205/60R15 |
5.5-7.5 |
|
|
46105 |
205/60R13 |
6.0-7.5 |
||
| Kumho |
V70A |
175/60HR13 |
5.0-6.0 |
|
|
V700 |
205/60R13 |
5.5-7.5 |
||
|
185/60R14 |
5.0-6.5 |
|||
|
C03 |
||||
| Michelin |
TB15 |
16/53-13 |
175/60R13 |
5.0-6.0 |
|
170/65R15 |
5.0-6.0 |
|||
| Silverstone |
FTZRR |
205/60R13 |
5.5-7.0 |
|
| Toyo |
Proxes RA1 |
205/60R13 |
5.5-7.5 |
|
|
Proxes R888 |
185/60R13 |
5.0-6.5 |
||
|
205/60R13 |
5.5-7.5 |
|||
|
185/60R14 |
5.0-6.5 |
|||
|
Proxes R888R |
185/60R13 |
5.0-6.5 |
||
|
185/60R14 |
5.0-6.5 |
|||
|
2015/60R13 |
5.5-7.5 |
|||
| Yokahama |
A021R |
185/60R13 |
5.0-6.5 |
|
|
A032R |
205/60R13 |
5.0-6.0 |
||
|
165/70R10 |
6.0-8.0 |
|||
|
A048 |
225/60R15 |
5.0-6.0 |
||
|
175/60R13 |
5.0-6.5 |
|||
|
185/60R13 |
5.5-7.5 |
|||
|
205/60R13 |
5.0-6.5 |
|||
|
185/60R14 |
5.5-7.0 |
|||
|
205/60R15 |
5.5-7.5 |
|||
|
A050 |
175/60R13 |
5.0-6.0 |
||
|
185/60R14 |
5.5-6.5 |
|||
|
195/60R14 |
5.5-7.0 |
ENGINE SEALING FOR GROUPS “S” & “N” TO BE MANDATORY FROM 1.1.2018
The purpose of engine sealing is to maintain the integrity of the cylinder bore & stroke measurements.
All engines to be sealed by a;
- Historic Eligibility Officer or,
- CAMS Technical Commissioner or,
- Any CAMS category authorised engine inspector/engine sealer
Procedure
Engines are to be sealed in accordance with the following procedure.
- The sealer for the engine being sealed will not have ANY association with the particular vehicle which the engine is being sealed for.
- Engine to be assembled to a short motor.
- Measure cylinder bore & stroke.
- Bore & stroke must respect the engine regulation & specification information. Refer to the CAMS Specification Sheet for the particular vehicle. If the measurements exceed the allowed specifications then the engine will not be sealed.
- Observe for any unauthorised modifications.
- Bolts to be wired & seals to be in place as necessary.
- List bore/stroke measurements & any observations on the form.
- The engine sealer is to provide to the competitor a CAMS Engine Inspection Sheet signed with a clearly printed name of the inspector.
- The Competitor will retain a copy of the engine sealing results for your records as you may be required to provide this information to the CAMS representative when requested.
Engine inspections
- Where there is a question of a suspect engine at a race meeting and the engine is found to be not sealed, the engine is to be sealed & the matter referred to the Stewards of the Meeting.
- Engines sealed prior to inspection/measuring will be subject to inspection at the convenience of the competitor i.e. When the engine is being dismantled for maintenance.
- Where the engine is requested to be dismantled for inspection (either as a result of a protest &/or at the discretion of the Stewards) & if found to be non-compliant the competitor will lose any accrued points from the time the engine was sealed, a charge is to be raised & referred to the Stewards for deliberation.60
60 https://www.cams.com.au/regulations/historics
Engine Seal Removal
IF THE ENGINE SEAL IS REMOVED FOR ANY REASON THE COMPETITOR MUST COMPLETE A SEAL REMOVAL FORM AND FORWARD A COPY TO THE CATEGORY TECHNICAL COMMISSIONER.
Note: Engines that have CAMS approved aftermarket parts installed e.g. cylinder heads, engine blocks may require extra sealing procedures to be carried out during assembly. Refer to the car make and model Specification Sheet for details.
Rotary engined cars must have engines checked for porting modifications and sealed during assembly.61
NEXT CLUB GENERAL MEETING
NEXT COMPETITIVE EVENT
NEXT COMMITTEE MEETING
Proudly sponsored by
