As a self-proposed future mechanical engineer, I have this pastime of designing my very own V12. One with high power, a 7000 RPM redline, and a pancake-flat torque curve. About that curve...

How will each area of the engine affect the power at low end (700-2800), midrange (2800-5000), and high end (5000-7000)?

Cam profile (including duration, lift, LSA)

Displacement (bore/stroke)

Valve area

Intake length & size

Header length & size

I understand that every part must be balanced for that flat torque band. I can’t hop in a long-stroke, mild-cam V12 and rightfully complain about lack of high-end power.