[MissClarrpz]

Originally Posted by Umai Naa

They can change engines prior to the meeting without penalty, but not during the meeting.

From WTCR Sporting Regs

No car may use more than one engine during the season. The engine is associated with the driver's race number. It will follow the driver if he changes cars, unless the new car is of a different model or competitor. If a driver is absent from one or more Competitions, his engine will be linked to the FIA Technical Passport number of the racing car.

Each engine must be sealed ... before being used by the competitor for the first time ... so as to prevent the dismantling of the cylinder head and oil sump. The breaking of any seal will be considered as a change of engine.

Any change of engine automatically results in the driver starting from the back of the grid in the next race in which he takes part, except in a case of force majeure

TCR Europe Sporting Regs are identical so won't repeat

Number of Turbos for season is 5 for WTCR and 3 for TCR Europe and follow same rules of sealing and penalties once more are taken.

Honda guy on how they change the engine from the road car

We don't do anything on the engine. This is stock engine coming from the factory and then you put it in and do some ECU tuning on it and this is what you're running with