Thread: 2000 rpm
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Old 02-27-2009, 05:34 PM   #30 (permalink)
Master of 140 hamsters
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Join Date: May 2008
Location: Lacey, WA
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Hamster - '07 Honda Civic EX
90 day: 29.41 mpg (US)

Whooshy Wagon - '04 Volvo V40
90 day: 23.33 mpg (US)

Minotaur - '09 Ford Taurus X SEL
90 day: 19.05 mpg (US)
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Originally Posted by Big Dave View Post
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.
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