Regulatory Shift on the Horizon: FIA Eyes Engine Management Overhaul Ahead of Japan
The FIA is reportedly preparing to introduce modifications to engine management regulations before the Japanese Grand Prix. Speculation is mounting within the paddock that the governing body will implement these changes in time for the race in Japan.

Whispers throughout the Formula 1 community suggest the FIA is positioning itself to introduce regulatory adjustments related to engine management ahead of the Japanese Grand Prix. The potential modifications to how teams manage their power units have become the subject of considerable discussion among paddock insiders, with growing indications that officials are preparing to act before the race takes place in Japan.
Original source
Pitpass
Related Regulations
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Full Regulation Text
Article 5.1
Definition of a New PU Manufacturer
Chapter: SECTION C: TECHNICAL REGULATIONS
In Simple Terms
A 'New PU Manufacturer' is a company entering F1 for the first time that hasn't built power units before (2014-2021) and hasn't inherited significant technology from existing manufacturers. If approved by the FIA, they receive special benefits and exemptions for 5 years (from 3 years before entry through 1 year after). The FIA evaluates applicants based on their facilities, engine experience, and ERS system knowledge.
- New PU Manufacturers must meet two conditions: no prior homologation since 2014 AND no significant inherited IP from established manufacturers
- Approved new manufacturers receive a 5-year window of special rights/exemptions (N-3 to N+1 calendar years)
- The FIA has absolute discretion in granting status and evaluates applicants on infrastructure investment, ICE experience, and ERS system expertise
Official FIA Text
A PU Manufacturer intending to supply PUs for the first time in year N, will be considered to be a "New PU Manufacturer" if it (or any related party): a. has not homologated a PU at least once in the period 2014-2021; and b. has not received any significant recent Intellectual Property from a PU Manufacturer who is not a New PU Manufacturer, subject to the conditions outlined in Article 5.2 of this Appendix. (together, for this Article 5 only, the "Necessary Conditions") The "New PU Manufacturer" status will be granted by the FIA, at its absolute discretion, for the complete calendar years from N-3 to N+1. In order to be granted the "New PU Manufacturer" status, the PU Manufacturer in question must, upon the request of the FIA, provide the FIA with all of the detailed information or documents requested by the FIA describing the commercial background and details of the PU Manufacturer's business, the Intellectual Property owned by the PU Manufacturer and the technical relationship between the PU Manufacturer and any other related entity or persons (the "Requested Documentation"). PU Manufacturers granted a "New PU Manufacturer" status are given additional rights or exemptions in certain provisions of the Technical, Sporting and Financial Regulations. In order to assess whether the Necessary Conditions have been satisfied by a PU Manufacturer, the FIA will assess the Requested Documentation provided by the PU Manufacturer with regard to three factors: a. Infrastructure: the necessity for the PU Manufacturer to build facilities, invest significantly in assets, and hire personnel with prior Formula 1 experience; b. ICE status: the prior experience of the PU Manufacturer in Formula 1 Internal Combustion Engines, and potential possession of significant recent Intellectual Property; and c. ERS status: the prior experience of the PU Manufacturer in Formula 1 ERS systems, and potential possession of significant recent Intellectual Property.
Article C5.13.4
Idle speed control target
Chapter: C5
In Simple Terms
F1 cars have a computer system that controls their engine speed when idling (sitting still or coasting). This rule limits how fast that idle speed can be set to a maximum of 4,000 revolutions per minute (rpm). This prevents teams from gaining unfair advantages by keeping their engines running faster when the car isn't actively accelerating.
- The idle speed control system in F1 cars cannot be programmed to exceed 4,000 rpm
- This applies when the engine is running but the car is not under acceleration
- The regulation ensures fair competition by preventing teams from using high idle speeds as a performance advantage
- This is a technical specification that must be verified during technical inspections
Official FIA Text
The idle speed control target may not exceed 4,000rpm.
Article C5.2.4
Fuel Energy Flow Below 10500rpm
Chapter: C5
In Simple Terms
F1 engines must limit how much fuel energy they use at lower engine speeds (below 10,500 rpm). The rule uses a formula to calculate the maximum allowed energy flow: teams can use more energy as the engine spins faster, but they're strictly limited to prevent excessive power at lower rpms.
- Applies only when engine speed is below 10,500 rpm
- Energy flow limit increases with engine rpm using the formula: 0.27 × rpm + 165 MJ/h
- At 10,500 rpm, the limit reaches approximately 2,997 MJ/h
- Ensures fair competition and controls engine performance in the low-rpm range
Official FIA Text
Below 10500rpm fuel energy flow must not exceed EF(MJ/h)=0.27*N(rpm)+165.
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