1. A homologated engine is an engine identical in every respect to either :
(i) An engine delivered to the FIA no later than 31 March 2008*.
Other than the specific exceptions below, any such engine must include all the parts described in Article 5.4.4 of the 2008 F1 Technical Regulations and be identical to one which completed two race Events during the 2007 Championship season.
The exceptions are :
a) the homologated parts of the intake system up to and including the air filter, fuel rail and injectors, ignition coils, engine mounted sensors and wiring, alternator, coolant pumps and oil pumps need not be identical to the parts used during the 2007 Championship season ;
b) three different designs of intake trumpet may be homologated no later than 31 March 2008 and used freely during the homologation period ;
c) parts solely associated with engine installation in different makes of car and which have no direct performance benefit, which may be changed from time to time during the homologation period with the consent of the FIA.
Once homologated in accordance with the above, and subject to (iii) below, no changes may be made to the design or construction of the homologated parts for the duration of the homologation period laid out in Article 28.5 of the 2008 F1 Sporting Regulations.
* Or at the first opportunity in the event that a competitor has no engine available which has completed two race Events in the 2008 Championship season.
(ii) An engine delivered to the FIA on or prior to 1 March 2009, such engine being identical to one delivered under (i) above but which has been modified for the sole purpose of mounting a Kinetic Energy Recovery System. Any such changes will be permitted at either the front or rear of the engine but must :
- have a minimal impact on the homologated engine ;
- in no way enhance the performance of the homologated engine ;
- not reduce the weight of the homologated engine or any of its component parts.
If a competitor intends to modify the homologated engine in this way he must provide precise details of the planned changes to the FIA on or before 15 December 2008. Once details have been provided in this way no further changes will be permitted.
(iii) An engine delivered to the FIA after 31 March 2008, or modified and re-delivered to the FIA after 31 March 2008, which the FIA is satisfied, in its absolute discretion and after full consultation with all other suppliers of engines for the Championship, could fairly and equitably be allowed to compete with other homologated engines.
