View Single Post
Old 08-06-2010, 02:30 PM   #22 (permalink)
redpoint5
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,813

Acura TSX - '06 Acura TSX
90 day: 24.19 mpg (US)

Lafawnda - CBR600 - '01 Honda CBR600 F4i
90 day: 47.32 mpg (US)

Big Yeller - Dodge/Cummins - '98 Dodge Ram 2500 base
90 day: 21.82 mpg (US)

Chevy ZR-2 - '03 Chevrolet S10 ZR2
90 day: 17.14 mpg (US)

Model Y - '24 Tesla Y LR AWD

Pacifica Hybrid - '21 Chrysler Pacifica Hybrid
90 day: 43.3 mpg (US)
Thanks: 4,327
Thanked 4,480 Times in 3,445 Posts
Quote:
Originally Posted by fidalgoman View Post
The more work you do the more energy is needed. Pulling a hill at fifty takes a great deal more energy than at thirty five.
More energy expended for a shorter duration though. What you have stated does not appear to be in conflict with my theory.

I acknowledge that there are practical limits to my theory, such as running an engine outside of the efficient range, and wind resistance. However, I don't see any evidence to support the theory that going as slow as possible up a hill is best.

Quote:
Originally Posted by Old Tele man View Post
...if you're driving with the cruise-control "on" never attempt to bump-up your speed while climbing a hill--it'll eat more gas and probably automatically kick you back a gear (automatic).

...delay the speed bump-up until you've crested the hill, and THEN do it as you're heading down the slope...much, much better FE wize!
Thanks for throwing out the tip. I always buy manual transmissions and never run a cruise control up a hill. Generally I build up some speed before beginning a hill climb, and maintain that speed to the top, depending on what the conditions are like on the other side. For example, I will coast towards the top of a hill and let my speed bleed off if I know the back side will carry me back up to speed.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







Give me absolute safety, or give me death!
  Reply With Quote