Quote Originally Posted by WRCStan View Post
It's plain English to me, I don't think I misread it. It might no longer be true or changed, I don't know.

“there’s a specific chapter that tells you how to build an engine for the championship”

But there's no reason why there's a guide on 'how to build a production engine for the championship' if the rules are for using a production engine common to Rally2 that belong in Group A surely? All you need in the WRC2027 regs is a simple statement - "use an engine homologated in Group A".

Maybe it's the specs of 'the Rally2 engine as basis' as we quite often read, so might be able to be built in the small volumes. That's the key point, not the specs.
again... "how to build an engine for the championship" doesn't mean you can build it from scratch or that is entirely new. it's not. there are rules on how to build it, and those rules -even for 27- point to existing specs and production related piece. that's it. of course they have to write it in the paper. no way a tech regulation can write "look at the previous one". they have to state all the things.

to further clarify, this is from dirtfish:
Engine
The engine will run at Rally2 specification, generating 300bhp. There is some discussion of another engine alternative, with Mestelan saying: “For the Rally2 engine, it’s already decided, this is already validated by the World [Motor Sport] Council, this is one option. There is also discussion to introduce a production-based engine based on production cars. It has to be refined with our manufacturers to know if we will validate this concept or not in addition to the current one. The aim here is to achieve power at a lower cost. [...]


source: https://dirtfish.com/rally/wrc/what-...c-2027-so-far/