View Single Post
Old 10-20-2015, 05:37 PM   #12 (permalink)
Frank Lee
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,762

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,585
Thanked 3,555 Times in 2,218 Posts
Quote:
Originally Posted by Alex77tj View Post
How come?
Because available energy is relatively small so the vehicle must be efficient.

Adding gear meshes adds driveline friction. And weight. And width. All because you are guessing the motor wants to rev higher. Since you are leaving the transaxle in, why not simply cruise in 3rd gear?

Running alternators off the motor: someone already explained it. It's inefficient. Perpetual motion machines don't work.
__________________


  Reply With Quote
The Following User Says Thank You to Frank Lee For This Useful Post:
elhigh (10-21-2015)