View Single Post
Old 03-07-2013, 06:34 AM   #34 (permalink)
redpoint5
Human Environmentalist
 
redpoint5's Avatar
 
Join Date: Aug 2010
Location: Oregon
Posts: 12,819

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 jayliu1984 View Post
For accelerating, what does it mean by as fast as possible? The engine revs up to 3k on 1st gear so fast, do I let off the pedal so it will shift? Or do I keep the position and let the car shift itself?

I have seem a lot of people here mentioning about accelerating at a brisk pace. What's brisk? And do all cars save fuel by accelerating at brisk level?

So is this 1500rpm is what you guys want to get to by brisk acceleration?

...I rearly can archive even 55 before I have to slow down for next red light or traffic.
Somewhere around 80% throttle will give you the most efficient acceleration. I often ease up on the throttle to get the car to shift to a higher gear, but I'm not sure that helps anything. Of course, if you are accelerating quickly only to have to slow down shortly thereafter, then slow acceleration is probably better. Ideally, you will accelerate briskly up to speed, and then coast in neutral to the next stop.

All gasoline powered cars will benefit from brisk acceleration due to lower pumping losses and placing the engine at optimal RPM. Research BSFC for a better understanding of the subject.

Cruising at 1500 RPM instead of 2000 RPM makes a huge difference in fuel consumption. It's too bad you aren't able to travel fast enough to get into the sweet spot of your transmission.
__________________
Gas and Electric Vehicle Cost of Ownership Calculator







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