[Kodak]

Let me see if I understand this correctly. Suppose I decide to skip any drivetrain mods and do some aero and weight improvements. Does this scenario check out?:

A throttle position of X is currently required to maintain 40 mph in 5th gear on level ground with no major wind. There is a slight engine vibration, so I decide to downshift, despite JR's success with even lower speeds. If aero is improved, and now the throttle position is X-2 units (sorry, not sure how it's measured), will the engine be more comfortable at 40 mph still in 5th?

So although engine speed has to stay the same, can a lighter throttle position to maintain speed help the engine be more comfortable at these lower rpms?

Or maybe I'm still way off.