These Club Competition Rules pertain to the running of the Sports Sedans SA Club Championships and are supplementary to the Motorsport Australia regulations for Group 3D Sports Sedans and the General Requirements of the Motorsport Australia Manual of Motorsport.

All members, on joining Sports Sedans SA (the Club), agree to comply with these competition rules in their entirety and must do so to be eligible for points in the Club Championships. 


The Committee of Sports Sedans SA reserves the right to, at its discretion, amend and modify these club competition rules as necessary. Any such change(s) would be undertaken with the consideration of and input from affected parties.

Club Signage

To be eligible for points in the Club Championships, each competitor must be a financial member of Sports Sedans SA and must correctly display the required Club and Sponsor Signage, including:

  • The Club Logo on both sides of the vehicle in a visible location.

  • Front Windscreen Banner depicting driver surname and relevant round sponsor logos

  • Any other Club/Sponsor Logos/Banners as required and advised by the Committee.

Club Championships

The Club runs two main championships:

  • The Outright Championship (all cars); and

  • The 2Litre Championship (cars up to 2000cc)


The Club may also run sub-championships by engine class and chassis type, subject there being a minimum number of competitors in each.


To establish engine capacity:

  • A multiplying factor of 1.7 applies to the swept capacity of forced induction engines; and

  • A multiplying factor of 1.75 applies to the swept capacity of rotary engines.


The Club Championships will consist of a number of nominated rounds as determined and scheduled by the Committee. The Committee may also organise and schedule other events as part of or separate to one or more Club Championships.

Minimum Racing Weights

All racing weights are wet weight including driver.

* For cars running multi-valve (more than 2 valves per cylinder) reciprocating engines with swept capacity of 2501cc or greater, racing weight is +75kg as shown in brackets.

Invited Classes

In addition to 3D Sports Sedans, the Club also recognises the following invited car classes in its Club Championships:

TA2 – Class 1D

  • Required to comply with Motorsport Australia Trans Am (TA2) Series Technical Regulations.

  • Must run Trans Am Series Control Tyre and Fuel Specs.

Restricted Turbo & Mini Challenge – Class 3D

  • Required to remain Floorpan cars as defined in the Sports Sedan 3D Regulations and these Club Competition rules.

  • Engine must remain within the original engine bay and not be set back any further than the firewall. No modifications to the firewall are allowed for the purposes of setting back the engine.

  • Maximum rim diameter is 17 inch, maximum rim width is 9 inch

  • Must run one of the following configurations:

    • Max swept capacity of 2000cc with a restriction orifice as outlined below; OR

    • Max swept capacity of 1600cc with a sealed mini challenge turbo compliant to mini challenge regulations using a FWD R50, R53 or R56 Mini Chassis only

  • Only one charging device (single turbo or supercharger) is allowed.


Restriction Orifice

  • A restrictor plate to the inlet tract prior to the air entering the turbo/supercharger such that all air used in the combustion process of the engine must pass through the restrictor and then directly through the turbo/supercharger.

  • Maximum internal diameter at any time to be 36mm, the upstream extremity of the restriction must be situated a maximum of 50mm from the upstream extremity of the moving compressing media and be maintained for a distance of at least 3mm downstream.


Points and Awards

At each round, the following points will be awarded each race:

A competitor must be classified as a finisher in the official race results to be eligible for Club Championship points in that race.

At each round, podium places will be awarded for the Outright and 2Litre Championships. To be eligible for a podium place a competitor must be a financial member of SSASA, have displayed the correct signage during the event and attend the club presentation after the last race, unless prior advice has been given of extenuating circumstances.

At the end of each year Championship podium positions will be awarded for the Outright and 2Litre Championships as well as engine class and chassis type sub-championships, subject to a minimum of three competitors in each division/class.

The number of trophies awarded in each of the above will be based on one less the number of competitors respectively.

Floorpan Chassis

For the purpose of the Club Championships, a car will be defined as a Floorpan car in accordance with the Sports Sedan 3D regulations, with the additional requirement that the engine must be located within the engine bay, forward of the original firewall location.

Some leeway will be given to cars that have had part Floorpan / sheet metal modifications or replacements due to damage or deterioration, as to whether to be considered a flat floor modification or still regarded as a Floorpan.

Race Meeting Audits

All cars may be subject to a club-initiated audit at any stage during a race meeting. These may be in addition to and do not substitute for any audit that may be undertaken by the event organiser(s), Motorsport Australia or their representatives or delegates. They are for Club Championship purposes only


Cars MUST be made available at any stage during the race meeting from the start of documentation to 30 mins after the conclusion of the last race for any such audit.


Lap Records

The Club will keep a register of Sports Sedan Lap Records for all tracks in South Australia used as part of the Club Championship.

  • Records will be kept for Outright and 2Litre lap records for cars complying with Sports Sedan 3D regulations.

  • Club lap records will also be kept for classes, including invited.


For a Lap Record to stand it must be a lap that was completed during race conditions (excludes qualifying) and run in accordance with the Motorsport Australia 3D regulations and, for Club Class records, these Club Competition Rules also.

It is the competitor’s responsibility to inform the Club if they believe a Lap Record has been set/broken.