Truckers' Trucking Forum | Message Board | Discussion - The Premier Truck Drivers Forum!  

Trucker MySpace - Truckers Making Friends. Chicken Truckers Come Meet Other Truckers!

Good Trucking Jobs - Forget Those CRAP Trucking Jobs & Find A Good Trucking Job!

Go Back   Truckers' Trucking Forum | Message Board | Discussion > The Owner Operators' Getaway > Ask An Owner Operator
Reload this Page HP And Torque's effect of Fuel Economy
JOIN Forum Donate Truckers Blogs FAQ Members List Calendar Mark Forums Read

Truckers' Trucking Forum/Message Board - The Premiere Truck Driver Forum
Sponsored Links

Important Truckers Forum Notice!
Hello Truckers & Non-Truckers! Be sure to check out our TRUCKERS SOCIAL GROUPS or check out our TRUCKERS BLOGS to make your OWN place on the internet! SEARCH

Ask An Owner Operator Always wanted to become an owner operator? This is a place to get tips & advice from owner operators & small business owners here!

Reply
Page 1 of 2 1 2 >
 
Thread Tools Rate Thread Display Modes
  ^ Top   #1  
Old 04.27.2008
Bobtail Member
  
Last Seen: 05.05.2008 05.19 PM
Member Since: Mar 2008
Location: Bend, OR
Trucker? No
Posts: 5
My Trucking Photos: 0

Thanks: 0
Thanked: 0 Times
HP And Torque's effect of Fuel Economy
Let say you have an aerodynamic tractor (Prostar, Cascadia, 387, T2000 etc.) and all the guts are the same (Rear end, Tranny, etc) except for differences in horsepower and torque....What do you guys think are you fuel economy differences going to be with a tractor that has 400 hp and 1650 lbft vs a truck that has 500 hp and 1850 lbft?? Is the difference going to be a lot??
Reply With Quote
Remove This Ad By Registering. Join Our Truck Forum and Trucking Community For Free. Sponsored Links:

  ^ Top   #2  
Old 04.27.2008
D16's Avatar
D16 D16 is offline
MIA (Banned or Retired)
  
Last Seen: 10.03.2008 03.51 PM
Member Since: Jul 2007
Location: Vancouver
Trucker? 5 Years
Age: 49
Posts: 190
My Trucking Photos: 0

Thanks: 0
Thanked: 0 Times
Quote:
Originally Posted by bboweruo View Post
Let say you have an aerodynamic tractor (Prostar, Cascadia, 387, T2000 etc.) and all the guts are the same (Rear end, Tranny, etc) except for differences in horsepower and torque....What do you guys think are you fuel economy differences going to be with a tractor that has 400 hp and 1650 lbft vs a truck that has 500 hp and 1850 lbft?? Is the difference going to be a lot??
Depend where you haul.At Rockies you definitely better with higher torque and HP.At flat states you enough with lower torque and HP.Also it's matter your gearbox-I prefer 18 or 13 speed in mountain driving.
Reply With Quote
  ^ Top   #3  
Old 04.27.2008
danc694u's Avatar
Road Train Member
  
Member Since: May 2007
Location: Mississippi
Trucker? 23 Years
Age: 48
Posts: 4,835
My Trucking Photos: 11

Thanks: 88
Thanked: 778 Times
The newer High Torque - Low RPM engines are the way to go, IMO.

I drove a twin turbo cat for awhile, I loved it. It would pull itself to death, even at the lower rpm's. Fuel economy was good too.

Check the specs for the DD15 by Detroit. It should be one hell of an engine.
__________________
.
Team Players.....
It's hard for me to play professional team sports. On a minor league salary.
Reply With Quote
  ^ Top   #4  
Old 04.28.2008
Agent86's Avatar
Road Train Member
  
Last Seen: 2 Hours Ago 08.32 AM
Member Since: Apr 2008
Location: Melbourne
Trucker? 6 Years
Age: 27
Posts: 2,418
My Trucking Photos: 0

Thanks: 838
Thanked: 481 Times
Gear fast run slow. the age old formula for fuel economy.
Reply With Quote
  ^ Top   #5  
Old 04.28.2008
Bobtail Member
  
Last Seen: 05.05.2008 05.19 PM
Member Since: Mar 2008
Location: Bend, OR
Trucker? No
Posts: 5
My Trucking Photos: 0

Thanks: 0
Thanked: 0 Times
I understand the gear fast run slow theory. My question though is really referring to fuel economy and if you the exact same engine (say a Cummins ISX for example) and you have two indentical tractors with the same guts in them. What (if any) is going to be the fuel economy difference if one tractor has an engine 400 HP 1650 lb/ft and the other tractor with 500 HP and 1850 lb/ft.

I know that this is a totally theoretical question but I thought that the owner operators out there that have expereince with different tractors would be able to give us (me) noobies some insight.

Thanks for all your replies.
Reply With Quote
Remove This Ad By Registering. Join Our Truck Forum and Trucking Community For Free. Sponsored Links:

  ^ Top   #6  
Old 04.28.2008
danc694u's Avatar
Road Train Member
  
Member Since: May 2007
Location: Mississippi
Trucker? 23 Years
Age: 48
Posts: 4,835
My Trucking Photos: 11

Thanks: 88
Thanked: 778 Times
Quote:
Originally Posted by bboweruo View Post
I understand the gear fast run slow theory. My question though is really referring to fuel economy and if you the exact same engine (say a Cummins ISX for example) and you have two indentical tractors with the same guts in them. What (if any) is going to be the fuel economy difference if one tractor has an engine 400 HP 1650 lb/ft and the other tractor with 500 HP and 1850 lb/ft.

I know that this is a totally theoretical question but I thought that the owner operators out there that have expereince with different tractors would be able to give us (me) noobies some insight.

Thanks for all your replies.
It will depend on the loads and terrain you run through. Both will get good fuel economy, if driven right. There will be times the larger engine gets better fuel economy, other times the smaller one will.

It all boils down to terrain and weight, with the engines you have described...if spec'd and driven the same.
__________________
.
Team Players.....
It's hard for me to play professional team sports. On a minor league salary.
Reply With Quote
  ^ Top   #7  
Old 04.28.2008
Kinghunter's Avatar
Heavy Load Member
  
Last Seen: 13 Hours Ago 09.31 PM
Member Since: Dec 2007
Location: Viera, FL
Trucker? 4-Wheeler
Age: 21
Posts: 992
My Trucking Photos: 0

Thanks: 332
Thanked: 47 Times
My Truckers Blog : 1
bboweruo,

Check out a Volvo VNL or a International Prostar. FYI, Walmart is replacing its current fleet with International Prostars for the fuel reason.

Hunter
Reply With Quote
  ^ Top   #8  
Old 04.28.2008
Medium Load Member
  
Last Seen: 1 Minute Ago 10.38 AM
Member Since: Nov 2007
Location: Tampa, Florida
Trucker? 0-1 Year
Age: 45
Posts: 401
My Trucking Photos: 0

Thanks: 8
Thanked: 21 Times
what's the scoop on the pro star's

how are they performing

what kind of mpg are they getting
Reply With Quote
  ^ Top   #9  
Old 04.29.2008
Bobtail Member
  
Last Seen: 05.05.2008 05.19 PM
Member Since: Mar 2008
Location: Bend, OR
Trucker? No
Posts: 5
My Trucking Photos: 0

Thanks: 0
Thanked: 0 Times
I'm with Bigray on this one....

What is Walmart getting out of the Prostars and does anybody know how Walmart specs their OTR tractors?? Do they have APU's??? (I would tend to think so)
Reply With Quote
  ^ Top   #10  
Old 04.30.2008
550hpW900L's Avatar
Road Train Member
  
Last Seen: 8 Minutes Ago 10.31 AM
Member Since: Jan 2008
Location: Watervliet, MI
Trucker? WannaBe
Posts: 5,402
My Trucking Photos: 0

Thanks: 306
Thanked: 749 Times
Here is my experience with fuel millage, this is a large car W900L with a 290" wheelbase and enough room between trailer and sleeper to stick another sleeper there. When my truck was stock 550hp/1850trq i would get 4.2mpg, i later started to play with the fuel temp and boost wires and dumped the mufflers, average went up to 4.8. Now i have a tweaked ecm with a 2300rpm program and a hotter timing curve, marine 3406E 800hp cam and injectors, MI turbo stage 5 turbo. The engine should develop anywhere around 900-950hp and i get 5.5-5.7mpg running west coast, i always load heavy as well. I noticed running around IL, IN, MI on flat ground and slower speeds i see 6.5+mpg.

The engine hardly works, and when you do push down on the throttle and see all the black smoke it just brings a tear to your eye.
__________________
Truckers

LOAD EM LIKE RAIL CARS, DRIVE EM LIKE RACE CARS!!!!
Reply With Quote
Reply
Page 1 of 2 1 2 >

Truckers Forum Bookmarks - Like This Thread? Tell The World!

Truckers' Trucking Forum/Message Board
Truckers Accessories

« Per Diem Thoughts | Where do you park your rig? »

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off
Forum Jump

Similar Threads
Thread Thread Starter Trucker Forum Replies Last Post
Factors Affecting Truck Fuel Economy OverDrive Trucks [ Eighteen Wheelers ] 0 06.08.2008 05.29 PM
Lawmakers to examine effect of surging diesel prices, where fuel surcharges go Cybergal Truckers Strike Forum 0 05.06.2008 08.37 AM
The Fridge Effect? kmatic Questions From New Drivers 18 02.10.2008 02.13 PM
Congress pushes off truck fuel economy standards Cybergal Truckers News 0 12.14.2007 03.12 PM
Fuel Economy and Low Emission Engines ft_ball_fan Questions To Truckers From The General Public 8 10.28.2007 08.32 PM


.

The Truckers Report - Trucker Photo Gallery - Contact Us - Truckers Forum - Top

vBulletin Forum Software, Copyright ©2000 - 2008, Jelsoft Enterprises Limited.
Copyright © The Truckers Report - Trucking Forum & Message Board - Truck Driver Discussion - Truck Forum

Trucker Forum Disclaimer: All content, information and opinions (collectively, the "Material") presented on Our Trucker Forum Discussion Board at TheTruckersReport.com are those of the authors of posts and messages (collectively, the "participants") and not The Truckers Report. The Truckers Report does not guarantee the reliability, completeness, accuracy, timeliness or up-to-date-ness of the material presented on the Truck Driver Forum. The material is published "as is," and does not represent the official views and opinions of The Truckers Report or any company. Any reliance upon the Material presented on these forums shall be at User's own risk. The Truckers Report does not review the substance of the content posted by users on these forums and is therefore not responsible for any of such content. The Truckers Forum merely provides a space for its users to express and exchange their own opinions.


Search Engine Friendly URLs by vBSEO