Reply
 
Thread Tools Display Modes
 
Old 10-24-2012, 03:18 PM   #1
Mini-Skoolie
 
Join Date: Jan 2009
Posts: 61
Year: 1990
Chassis: International
Engine: DT360
idling fuel consumption - DT360

I have a DT 360 and was curious how much fuel I might consume while idling. Does anyone have any stats on this? I was considering adding a couple more alternators and using my engine as a ~4kw generator at Burning Man. The other consideration is would it be damaging to the engine to run it at low rpms for so long?
icnivad is offline   Reply With Quote
Old 10-24-2012, 03:32 PM   #2
Site Team
 
crazycal's Avatar
 
Join Date: Feb 2007
Posts: 4,087
Re: idling fuel consumption - DT360

I bet you will burn 1/3 to 1/2 gallon per hour. That is just a guess. Not an educated guess, just a guess.
__________________
I'm hungry!

You Gotta Let Me Fly
crazycal is offline   Reply With Quote
Old 10-24-2012, 10:58 PM   #3
Mini-Skoolie
 
Join Date: Oct 2012
Location: Alabama
Posts: 13
Year: 1993
Coachwork: Bluebird
Chassis: TC2000
Engine: Cummins 6BTA 5.9
Rated Cap: 78
Re: idling fuel consumption - DT360

I would use a cheap 2-cyle generator and a 40-amp battery charger before I would idle the main engine to generate electricity.
The engine won't oil itself very well while idling. It also might develop hot spots from insufficient coolant flow. The engine can set up damaging resonant vibrations, too. Believe it or not, engines have been known to break the crankshaft due to extended idling. At the very least you would need to run it at a fast idle, and maybe even incorporate an electronic controller to periodically raise the engine speed for a second or two.
Lastly, automotive alternators are horribly inefficient, and running more than one of them compounds the problem.
PossumLiving is offline   Reply With Quote
Old 10-25-2012, 01:21 AM   #4
Site Team
 
crazycal's Avatar
 
Join Date: Feb 2007
Posts: 4,087
Re: idling fuel consumption - DT360

Quote:
Originally Posted by PossumLiving
I would use a cheap 2-cyle generator and a 40-amp battery charger before I would idle the main engine to generate electricity.
The engine won't oil itself very well while idling. It also might develop hot spots from insufficient coolant flow. The engine can set up damaging resonant vibrations, too. Believe it or not, engines have been known to break the crankshaft due to extended idling. At the very least you would need to run it at a fast idle, and maybe even incorporate an electronic controller to periodically raise the engine speed for a second or two.
Lastly, automotive alternators are horribly inefficient, and running more than one of them compounds the problem.

Yeah, what he said too.
__________________
I'm hungry!

You Gotta Let Me Fly
crazycal is offline   Reply With Quote
Old 10-25-2012, 10:05 AM   #5
Almost There
 
kimberlink's Avatar
 
Join Date: May 2012
Location: Millstadt Illinois near St Louis MO
Posts: 89
Year: 1998
Coachwork: Crown
Chassis: International
Engine: DT466 / AT545
Rated Cap: 71
Re: idling fuel consumption - DT360

Quote:
Originally Posted by PossumLiving
I would use a cheap 2-cyle generator and a 40-amp battery charger before I would idle the main engine to generate electricity.
The engine won't oil itself very well while idling. It also might develop hot spots from insufficient coolant flow. The engine can set up damaging resonant vibrations, too. Believe it or not, engines have been known to break the crankshaft due to extended idling. At the very least you would need to run it at a fast idle, and maybe even incorporate an electronic controller to periodically raise the engine speed for a second or two.
Lastly, automotive alternators are horribly inefficient, and running more than one of them compounds the problem.
Ditto; or a 4 cycle genny, couple hundred bucks at most home improvement stores, plus the Big Rigs average 1-2 gph while idling (according to Modern Marvels ) so I'd guess 1/2-1 gph.
__________________
The most terrifying words in the English language are: I'm from the government and I'm here to help.
Ronald Reagan

http://s1253.beta.photobucket.com/us...k1961/library/
kimberlink is offline   Reply With Quote
Old 10-26-2012, 09:20 AM   #6
Skoolie
 
travelinwithus's Avatar
 
Join Date: Aug 2012
Location: Wisconsin
Posts: 238
Re: idling fuel consumption - DT360

I have been looking into this as well. I found a paper a student was doing on bus emissions for his degree of master science. You can view it here: http://users.rowan.edu/~marchese/hearne041004.pdf (fuel consumption info on page 101.) He tested I believe three different school buses and one had a DT-466. In the paper he reported that the DT motor burned a little less than .4 gallons per hour. He did not state if this was at idle or an increased idle so I assume it was idling at the factory idle specification. As far as idle I have had people tell me and read that if you idle for extended periods of time you need to idle it up between 800 and 1000 rpms to increase the oil pressure. Hope this helps cause it was difficult for me to find the same info when I was looking.
travelinwithus is offline   Reply With Quote
Old 10-26-2012, 11:16 AM   #7
Almost There
 
kimberlink's Avatar
 
Join Date: May 2012
Location: Millstadt Illinois near St Louis MO
Posts: 89
Year: 1998
Coachwork: Crown
Chassis: International
Engine: DT466 / AT545
Rated Cap: 71
Re: idling fuel consumption - DT360

so using the .4 gph for idle times 24 hours in a day thats 9.6 gallons per day at 4 bucks a gallon thats 38.40 dollars time however many days. lets say 10 days which equals 384.oo dollars. For about 350.00 you can get a portable 3.5-4 KW gas or propane generator and save the bus engine for getting home...

Just my two cents for whats its worth. not intended to upset anyone so please dont let it. just wanted to point this out.
__________________
The most terrifying words in the English language are: I'm from the government and I'm here to help.
Ronald Reagan

http://s1253.beta.photobucket.com/us...k1961/library/
kimberlink is offline   Reply With Quote
Old 10-26-2012, 01:22 PM   #8
Site Team
 
crazycal's Avatar
 
Join Date: Feb 2007
Posts: 4,087
Re: idling fuel consumption - DT360

Quote:
Originally Posted by travelinwithus
As far as idle I have had people tell me and read that if you idle for extended periods of time you need to idle it up between 800 and 1000 rpms to increase the oil pressure. Hope this helps cause it was difficult for me to find the same info when I was looking.

This makes sense because my bus vibrates a lot when sitting at idle. If I bump the rpms by just 100 rpm, the engine is much smoother.
__________________
I'm hungry!

You Gotta Let Me Fly
crazycal is offline   Reply With Quote
Old 10-26-2012, 05:34 PM   #9
Mini-Skoolie
 
Join Date: Oct 2012
Location: Alabama
Posts: 13
Year: 1993
Coachwork: Bluebird
Chassis: TC2000
Engine: Cummins 6BTA 5.9
Rated Cap: 78
Re: idling fuel consumption - DT360

Keep in mind that the .4 gph figure said nothing about powering a load with it. If you draw current from the alternator, that will show up as increased fuel usage over just idling with no load. Let's say for example that you use 50 amperes continuous at 14.2 volts. That is 710 watts, but because the alternator is no more than 50% efficient (I have tested this, btw) the actual power used would be over 1400 watts. So the actual fuel usage would be .4 gph (assuming that is an accurate figure) PLUS however much fuel it takes to generate 1400 watts, which for a really efficient diesel engine would be about .15 to .2 gph. Still not much increase, but it gets worse as you draw more current. It wouldn't take long for the fuel savings to pay for a generator. Most of the small generators use a quart per hour or less, under average loads. Small diesel gensets are even better.
PossumLiving is offline   Reply With Quote
Old 10-26-2012, 08:06 PM   #10
Bus Crazy
 
opus's Avatar
 
Join Date: May 2010
Location: Montana
Posts: 1,615
Year: 1995
Coachwork: Blue Bird
Chassis: All-American R/E
Engine: 8.3 Cummins
Rated Cap: 72
Re: idling fuel consumption - DT360

Nah, I wouldnt want to put the hours on the big engine or idle my engine at one rpm too long.

You can find a Champion 3500W for about $230 if you look hard. They are a great Chinese knockoff generator. I spent a LOT of time researching them and found a lot of positive. Even if you run it for 2 yrs and junk it, pretty cheap to replace.
opus is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Monitoring Fuel Consumption/Mileage edfrank Conversion General Discussions 14 07-06-2012 09:35 PM
DT360 or 466? nevrenufhp International | Navistar Drivetrain 2 05-04-2011 02:40 PM
Low power consumption fridge rabiznick Everything Else | General Skoolie Discussions 1 11-26-2005 11:30 AM
electrical power consumption bocephus Everything Else | General Skoolie Discussions 3 11-24-2005 01:07 AM
fuel consumption... abdabbs Conversion General Discussions 4 07-21-2004 01:28 AM

» Virginia Campgrounds

Reviews provided by

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 11:51 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.