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30. Balance Of Performance, Official Test Sessions And Private Testing

30.1 Balance of Performance

Due to the nature of the cars and the choice of circuits, a specific Balance of Performance can be carried out for cars taking part in the GT Challenge Asia Series.

Balance of Performance testing sessions of the FIA GT3 models running in the GT Challenge Asia Series will be held before the start of the season. All cars competing in Endurance Competitions will have to be equipped with their endurance pack if it is available and has been homologated.

All manufacturers whose cars will be competing in the 2024 season must enter at least one of their cars for the purposes of Balance of Performance Testing. A penalty may be imposed by the SRO Technical Board on any Team which does not attend, except for force majeure accepted as such by the Board.

Additional performance tests may be carried out at any point during an Event and Teams will be required to allow their cars to take part in these tests if selected.

The SRO Technical Board is allowed to modify any parameter required to establish the SRO Balance of Performance.

The SRO Technical Board reserves the right to adjust the Balance of Performance until 120 minutes before the start of the first Race for Case A and the Race for Case B. Teams will be notified of any such changes during the Event via a Bulletin from the Stewards.

If the Stewards are satisfied that any Competitor or manufacturer has provided information which was misleading or has inappropriately influenced the BOP process before or during an event/competition or where a Competitor's or manufacturer's subsequent performance is higher than the expected result, they may impose sanctions or penalties before, during or after a Competition.

An extended version of the data logger, approved by SRO Technical Board, will be installed in all cars during the BOP.

Cars must comply at all times during each competition with the information and instructions given in the Balance of Performance document for the relevant category of Track, the current version of which will be validated by the Stewards for each event via a Bulletin.

30.1.1. BOP Remarks – GT3

Teams must abide by the following additional information in terms of the Balance of Performance documents, which may be altered or amended at any time. The latest version included in the BOP for any specific event will always be the correct one.

a) Additional weight must be installed in accordance with the 2024 Article 257A of Appendix J to the International Sporting Code. Driver pairing weight must be installed in the ballast box. It should be identifiable and installed as a whole and is not part of the total weight of the car with BOP ballast.

b) In accordance with 2024 Article 257A of Appendix J to the International Sporting Code, the use of the foam supplied by and installed following the directives from the manufacturer of the fuel cell is recommended

c) Technical drawings of air restrictors for all FIA GT3 cars are registered with FIA. Only restrictors in compliance with this registration are allowed.

d) Use of the catalytic converter is compulsory

e) The SRO Sporting Board is allowed to modify any parameter required to establish the Balance of Performance

f) Engine reference data (iA, Lambda, Fuel inj, Cam In/Out, airbox pressure drop, etc) and performance data (acceleration rates, V-max, aero data) is that collected during the 2024 Official tests for cars homologated prior to 2024 and during the 2024 BOP and Dyno tests for the 2024 homologated cars and will be used for checks. Lambda is fixed. Fuel saving maps are not allowed.

g) Refuelling rigs, refuelling rig restrictors shape and refuelling couplers must comply with Article 257A of Appendix J to the International Sporting Code and the Fanatec GT World Challenge Asia powered by AWS Sporting Regulations and any Sporting or Technical Notes

h) if Krontec 88 KSL, or another Krontec coupler is used, the refueling restrictor size reduces by 2 mm.

j) Aero devices cannot be covered by tape or paint, unless authorised by the Technical Delegate.

k) Max rear camber static is -3.5°

l) Only springs homologated in the FIA GT3 homologation file can be used for FIA GT3 038, FIA GT3-042, FIA GT3-051 and FIA GT3-052. For FIA GT3-053, FIA GT3-055, FIA GT3-056 and FIA GT3-058, only springs allowed by SRO Motorsports Group can be used.

m) In any case the minimum FIA RH of 50 mm has to be respected for all cars.

30.1.2. Boost Control

  • Values are boost pressure ratio and need to be multiplicated by the ambient pressure to get the Pboost Limit.
  • Competitors must adjust the boost pressure relative to ambient pressure at each Event
  • Pboost limits linear interpolation approach

The control of Pboost strategy takes place via Series Datalogger and pressure sensors:
If the Throttle is greater than 30 % open and the RPM is greater than 3000 and the Longitudinal Acceleration is increasing or constant or greater than zero and the overboost greater than “Pboost Limit + 10 mbar” is recorded for more than 50ms, then this will be flagged and reported to the Stewards

30.1.3. BOP Remarks for GT4 cars

Teams must abide by the following additional information in terms of the Balance of Performance documents, which may be altered or amended at any time. The latest version included in the BOP for any specific event will always be the correct one.

  • Additional BOP Ballast must be installed according to the GT4 Technical Regulations

  • ECU BOP maps are saved in the dataloggers for scrutineering.

  • GT4 Cars are only eligible if presented with GT4 homologation file and SRO GT4 Certificate

  • SRO GT Bureau can use any parameter for BOP purposes and can change the BOP of any car at any moment during the event.

  • Engine reference data (iA, Lambda, Fuel inj, Cam In/Out, airbox pressure) is the one collected during BOP tests and will be used for checks.

If noted differently in comments the (e.g. iA, Lambda, Fuel inj, Cam In/Out, airbox pressure) is set as reference.

  • Turbo cars without adaptable pboost (identified with * in front of ECU BOP MAP) need to add +15kg per 20 mbar ambient pressure delta under 1010mbar,
    this means + 15 kg at Patmo of 990mb, +30 kg at Patmo of 970 mbar and +45 kg at Patmo of 950 mbar

  • Max static rear camber: -3.5°

30.2. Official Test Sessions

One or more Official testing sessions and media days may be organised by the Promoter before the first event of the season.

Additional testing may be permitted throughout the season. This will be notified by the organisers.

30.3. Official Paid Test Sessions

Additional paid private testing sessions may be authorised by the Promoter before certain events. Any such official paid test sessions will be open to all Competitors but will not be mandatory. These sessions will not be considered as part of the meeting. Please see Appendix 4 for the provisional schedule

There will be no limitations on the number of tyres for these event test sessions which will be given in Team Information documents. but they All tyres must be in conformity with the principles laid down in article 29.1, namely either new tyres or used tyres from previous events of the GT Challenge Asia Series. Tyres used during these sessions may not be marked for use during an Event.

The price per car and the instructions for any such tests will be made available before the Event.

30.4. N/A

30.5. Official test sessions

Official test sessions (mandatory or non-mandatory) will not be regarded as being part of any Event or Competition, and drivers and cars which are not registered for the Series may be permitted to take part at the sole discretion of the Promoter.

30.6. N/A

30.7. N/A

30.8. Hardship Laps

In exceptional circumstances, Teams may request a hardship lap in order to check a car after significant repairs or other issues. Any such requests must be made to the Stewards of the Meeting. If authorised, any such laps will be scheduled, when possible, at the end of a previous session and will consist of a single lap from pit out to pit in without crossing the timing line.

30.9. Private Testing

Group 1 GT Asia Testing restrictions begin on April 13, seven days before Round 1 (April 20-21).

Group 2 Japan Cup -- Testing restrictions begin on June 1, seven days before Round 1 (June 8-9).

In the seven days prior to Round 1, and then all future events, teams and drivers may only test during official sessions organized by SRO Motorsports Group. Private testing or testing organized by third parties is not permitted at circuits on the 2024 GT Challenge Asia calendar until after each circuit has staged its championship round subject to the organiser's approval.

Official testing will take place at all events unless officially announced. Testing is usually held on the Thursday and/or Friday prior to the race weekend. Track time and cost are to be advised.

Participation in events counting towards other championships or series is not considered as private testing. This includes any official test sessions and all official practice sessions. However, participation in any additional (optional) sessions during these events is not authorised. Any breach or abuse of this rule in spirit will be reported to the Stewards of the meeting.

Race-by-race entries are subject to testing limitations. Any doubts, please check with the organizers before going ahead. Registered and recurring race-by-race entries testing within this ban may receive a grid penalty up to and including starting from the back of the grid and may be fined up to $10,000.

Private testing at a circuit on the calendar may be authorised if the circuit configuration used is significantly different from that being used for the GT Challenge Event. 'Significantly' would normally mean using fewer than half the same corners.

Drivers working as coaches must request permission from the Sporting Board for any activity with GT3, GTC, GT2 or GT4 cars at circuits on the 2024 calendar, and will be given restrictions on their track time.

Written permission for any testing during the season must be obtained from the SRO Sporting Board.

Any breaches of these rules will be reported to the Stewards of the Meeting at the relevant Competition of the Series. Penalties may go as far as disqualification from that Competition