Quote:
Originally Posted by Big Dave
For me, 2000 RPM in top gear would have me going about 85 MPH. I cruise 1700 RPM = 70 MPH. 1450 RPM = 60 MPH.
2000 RPM is considered the magic MPG engine speed for these school bus motors.
|
Big Dave - if you have the 5.4L V-8, then
your ideal range should be 1419-1713 rpm. If you are already at ideal engine speed going 60, then going slower would technically hurt your mileage, right? 60 creates a significant amount of aero drag. So unless you shorten your tallest gear to go 45-55 you are damned either way.
Either engine/gearing inefficiencies or aero drag.