Thread: Project MPG
View Single Post
Old 09-13-2011, 11:04 PM   #9 (permalink)
HighMPG
EcoModding Apprentice
 
HighMPG's Avatar
 
Join Date: Sep 2011
Location: California
Posts: 145

Super Duty - '12 Ford F250 Super Duty XLT Long Bed Super-Cab
90 day: 15.29 mpg (US)
Thanks: 22
Thanked 8 Times in 7 Posts
Thumbs up

Quote:
Originally Posted by euromodder View Post
When you need power - as when accelerating - it's good to make that power as efficiently as the engine will let you.
Strangely enough, you don't get that by feathering the throttle, but by accelerating at the best Brake Specific Fuel Consumption - BSFC - where most horses are fed using the least fuel.
This usually means giving it a good go, say 80% load, at low rpm.
It's how pulse and glide becomes more efficient than steady state driving.

If you can find a BSFC chart for the engine, you can see where it makes its power most efficiently.

For (more or less) steady state driving, feathering the throttle is OK.
Thanks man! I actually learned something new! and I am not being sarcastic!
I guess getting the MPGuino will help me better understand and observe.
So it's ok if I use up to 80% throttle before my set 2500rpm limit, get to my coasting speed sooner and coasting longer = more MPG if I am understanding you properly? Thanks
__________________

Good Bye Insight Hello 6.7 Diesel Truck!
**My First Hybrid Insight**
  Reply With Quote