1.To Specifically adjust The Engine Bay Position(Center,Front Mid-Engined,)
2.If we dont get Sequential Turbos Maybe A Anti-lag System(Used in the Prodrive P2 Prototype and Rally cars)
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Engine bay position is defined in the files that define each car body.
Usually it is defined so the firewall is pretty much aligned with the lower part of the windshield and the radiator located as far forward as possible w/o causing clipping issues.
As for front mid-engined layouts, the way the game currently works, with the longitudinal RWD layout the engine is mounted very close to the firewall. Depending on the engine bay configuration, this does the same thing as a midship mounted front-engine layout.
And for giving the choice between front and mid-engined, on most bodies it doesn’t really make sense to go from one to the other, although I would personally like to see mid-engined being an option for some 3-door hatchbacks.
We will probably get Sequential Turbos at some point. Anti-lag systems are out since it’s a technology used only on racing cars.
Also, please use the search function next time, the two things you mention in your second suggestion have already been suggested.