All the "engine" talk has to be taken with a grain of salt. It's just a concept, mental model. It means nothing in a fight. The only part that makes any difference at all is how you've drilled your fundamentals to react.
WCK people get too caught up in the cerebral, the conceptual as the art is based upon concepts.
That's why they get their ears boxed by a boxer who has no knowledge of "engines" but has a disciplined regimen of bag work, pad work, foot work and sparring.
When you are in a fight you don't have time for "gentlemen start your engines". You have to fight. Now.