Click the headings in green below for information on each group or class.

The group is intended to represent the early racing and sports car development period of significant excellence in design and workmanship known as the "vintage" period.
The group is split into the two subclassifications, Ja and Jb.

Group Ja: Vehicles eligible for this group will be racing and sports cars with a competition history established prior to 31 December, 1930. Consideration will also be given to individual sports cars that do not have an established competition history but are of a type that appeared in competition prior to the end of 1930.

Group Jb: One-off "special" type vehicles constructed at any time using major components (ie, engine, chassis, transmission, axles and suspension) manufactured prior to the end of 1930. Such vehicles must be similar in detailed specification and appearance to vehicles, which actually appeared in competition prior to the end of 1930. Vehicles which precisely replicate a genuine original historic racing car will however be eligible only within the provisions of the regulations relating to "recreations" (refer section 1.7 of the 5th Category Preamble in the CAMS manual).

The group is intended to represent the PreWorld War two and early post-World War two periods, which includes the classically engineered factory racing and sports cars, local specials constructed on a "one-off' basis, using production car components from the pre-war period and factory constructed vehicles that were modified with production car engines from pre-war period. The group is split into two sub-classifications, Ka and Kb.

Group Ka: Vehicles eligible for this group will be racing and sports cars with a competition history established between 1 January, 1931 and 31 December, 1949, but constructed from major components manufactured prior to the end of 1940. Consideration will also be given to individual sports cars that do not have an established competition history but are of a type that appeared in competition prior to the end of 1940.

Group Kb: One-off "special" type vehicles constructed at any time using major components (ie, using engine, chassis, transmission, axles and suspension) manufactured prior to the end of 1945. Such vehicles must be similar in detailed specification and appearance to vehicles, which actually appeared in competition prior to the end of 1940. Vehicles which precisely replicate a genuine original historic racing car will however be eligible only within the provisions of the regulations relating to "recreations".

Vehicles classified in this group will reflect the post-World War 2 period of technology changes extending from the first of the post-war designs through an evolution culminating with the first of the mid-engined vehicles of the late 1950s.Eligibility will be open to racing and sports cars with a competition history established in the period between 1 January, 1941 and 31 December, 1960, but excluding vehicles constructed from pre-1940 components which are eligible for classification in Group K- The group will include all vehicles constructed specifically to the post-war 500cc Formula 3 even if such vehicles are constructed from pre-1946 components.

Consideration may also be given to the classification within this group of vehicles constructed between 1 January, 1941 and 31 December, 1960 but with a competition history established subsequent to 31 December, 1960 or, in some circumstances, without a racing history provided the specification of the vehicle is consistent with the general standard of technology evident in vehicles raced during the group period and the vehicle is compatible in appearance with such vehicles.

The group is intended to cater for racing, sports racing and sports cars with a competition history established in the period between 1 January, 1961 and 31 December, 1965. Such vehicles will reflect the development of more advanced design features such as complex space frame and monocoque structures, sophisticated adjustable suspension systems and the commencement of wide racing tyre development.

Consideration may also be given to the classification within this group of vehicles constructed between 1 January, 1961 and 31 December, 1965 but with a competition history established subsequent to 31 December, 1965 or, in some circumstances, without a racing history, provided the specification of the vehicle is consistent with the general standard of technology evident in vehicles raced during the group period, and the vehicle is compatible in appearance with such vehicles.

Formula Vee vehicles are specifically excluded from this Group.

Group Na - Pre-1958 Touring Cars.

Group Nb is the revised description of the group previously known as Appendix J, and more recently as Group N. It 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 examples of a particular model must have been produced for the vehicle to be eligible.

Original vehicles with a competition history are welcome, however it is envisaged that most vehicles will not have a racing history and these are acceptable provided that they are accurate in detail both mechanically and visually. In the case of original vehicles, they must conform with the mechanical specifications listed below, however minor modification undertaken and employed during the period are acceptable.

Group Nc is an historic group introduced on 1 January, 1995, to cater primarily for vehicles of a make and model which competed in Australia between 1 January, 1965, and 31 December, 1972 in either the Australian Touring Car championship and in races specifically for 3rd Category Group C Improved Production Touring Cars.

During the 1965-1972 period the rules for the vehicles evolved significantly, therefore the Group Nc rules have been established to enable competition under a common set of rules which reflect the nature of top-level car racing in the period.

It is envisaged that most vehicles in this class will not have a racing history and these are acceptable provided they are accurate in detail both mechanically and visually. Vehicles with a racing history may be presented in the most predominant form in which they were raced in the period, including the original sponsor signage, even though this specification may not fully conform with these rules.

A list of eligible vehicles and vehicle specification sheets for the more popular models are under preparation and will be available from CAMS.

The group is intended to cater for racing, sports racing and sports cars with a competition history established in the period between 1 January 1966 and 31 December 1969, excluding vehicles fitted with aerodynamic devices as defined under "specific requirements" below. Formula Vee, Formula Ford and Formula 5000 cars are also specifically excluded from this group which is intended to reflect the development of wide treaded racing tyre technology and its effect on suspension and chassis design but stopping short of the period when external aerodynamic devices became a major design feature with a significant impact on cornering performance.

Consideration may also be given to the classification within this group of vehicles constructed between 1 January, 1966 and 31 December, 1969 but with a competition history established subsequent to 31 December, 1969, provided that the specification of the vehicle is consistent with-the general standard of technology evident in vehicles raced during the group period and the vehicle is compatible in appearance with such vehicles.

The group is intended to cater for racing, sports racing and sports cars with a competition history established in the period between 1 January, 1970 and 31 December, 1977, and for vehicles excluded from classification within other groups of the 5th Category because of the nature of aerodynamic devices with which they are fitted. Formula Vee and Formula 5000 cars are specifically excluded from this group which is intended to reflect the development of aerodynamic technology as an aid to cornering performance but without extending to the period when such technology extended to the use of the vehicle underbody as an aerodynamic aid, ie, the wing car era.

Formula Ford vehicles classified in this group will generally be restricted to those equipped with "outboard" rather than "inboard" mounted springs and shock absorbers. Consideration will, however be given to classification of Formula Ford vehicles equipped with "inboard" mounted springs and shock absorbers where the general design standard of the vehicle is consistent with Group Q period.

Consideration may also be given to the classification within this group of vehicles constructed between 1 January, 1970 and 31 December, 1977, but with a competition history established subsequent to 31 December, 1977, provided the specification of the vehicle is consistent with the general standard of technology evident in vehicles racing during the group period and the vehicle is compatible in a appearance with such vehicles.

Group R - Historic Racing and Sports Cars - Post- 1977: 1st Janaury 1978 - 31st December 1987.

Production Sports Cars, as recognised by CAMS, manufactured after 1 January 1941 but prior to 31 December 1960 with the inclusion of certain model run-ons (eg, Mk 1 Austin Healey Sprite). Cars classified in this group will not necessarily have a racing history. Factory built, competition variants of standard production vehicles are not eligible for this group, but could be eligible for Group Lb subject to specific application.

Limited modifications, as detailed in the following regulations (see the CAMS manual), are allowed to these vehicles. Where performance-improving modifications are made, these should be of period nature and not out of character with the vehicle or group period.

A specific group of Production Sports Cars generally manufactured between 1 January 1961 and 31 December 1969, with the inclusion of model run-ons (eg, Triumph Spitfire Mk3), as detailed in the following list. Vehicles classified in this group will not necessarily have a racing history. Factory built, competition variants of standard production vehicles are not eligible for this group, but could be eligible for Groups M or O, subject to specific application.

Limited modifications as detailed in the following regulations are allowed to these vehicles. Where performance improving modifications are made, these should be of a nature and not out of character with the vehicle or group period.

A specific group of non-turbocharged production sports cars manufactured between 1 January, 1970, and 31 December, 1977, with the inclusion of model run-ons (eg, Datsun 260Z) Vehicles classified in this Group will not necessarily have a racing history. Factory built, competitive variants of standard production vehicles are not eligible for this group, but could be eligible for Historic Group Q, subject to specific application.

Group Va - Pre 1975 Historic Formula Vee: 1st January 1965 - 31st December 1974
Group Vb - 1975 - 1985 Hisotric Formula Vee: 1st January 1975 - 31st December 1985

Regularity Trials are a variation of the rules for Historic competition to allow those who are unwilling to race to run their vehicles for the enjoyment of themselves and the spectators. It is a competition being a trial of regularity; it is not a speed event. As such, it is exempted from some of the requirements of race competition. The continuing existence of regularity trials relies upon the exercise of common-sense, and, more particularly, good judgement on the part of the organisers in accepting or rejecting entries for specific events. Gross variations in potential speed are not condoned, and lap times close to racing lap times for specific vehicles are also unacceptable.

* Please note Historic Winton 'Regularity' Group caters primarily for pre-WW2 cars.

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Contact

0407 330 881 - Event Secretary
Winton Motor Raceway, near Benalla, Victoria