VP44 Pump Catch me if you can (MPG)
This is a discussion on Catch me if you can (MPG) within the VP44 Pump forums, part of the Dodge Ram Cummins Diesel Forum category!
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Gasoline 116,090 BTU per gallon / 3.919 = 29,622 BTU ...
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09-13-2011, 07:05 PM
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#21 (permalink)
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Cummins Diesel Section Mod
Join Date: Aug 2011
Location: New Meadows, Idaho
Name: Michael
Age: 41
Posts: 719
Ram Year: 1996, 2002
Engine: 1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
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Here you go...
Gasoline 116,090 BTU per gallon / 3.919 = 29,622 BTU per dollar
Diesel 133,000 BTU per gallon / 4.099 = 32,446 BTU per dollar
Diesel still is a better deal...
As for the rise... RV275 injectors, Edge Comp (5x5), and learning how to drive again...
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Michael Nelson - RamForum.com Cummins Moderator 2002 Dodge Ram 2500 Cummins - Mod List ~+~ Pulling 2000 Jayco Eagle 296 FBS ~+~ 1996 Dodge Ram 1500 5.9L V8 - Mod List |
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02-08-2012, 03:09 PM
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#22 (permalink)
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Administrator / Owner
Join Date: Jun 2010
Location: Central Illinois
Name: Dave
Age: 32
Posts: 18,840
Ram Year: 1994
Engine: 7.5L
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Now with the mods I have put in I am down to 17/21
Still not bad IMO
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02-08-2012, 03:52 PM
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#23 (permalink)
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Cummins Diesel Section Mod
Join Date: Aug 2011
Location: New Meadows, Idaho
Name: Michael
Age: 41
Posts: 719
Ram Year: 1996, 2002
Engine: 1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
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Knowing you've got larger tires how are you getting your distance number correct?
Percentage offset or using a GPS?
With weather at about -2*F for starting low and +22*F for a high and travel all the way to Ontario, OR get some stuff and head home. With my list of mods and running my 265/75 R16's I pulled... Cmg is my round trip... Tmg was from Ontario, OR to home...
Still I think I got you with even colder and nasty weather...
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Michael Nelson - RamForum.com Cummins Moderator 2002 Dodge Ram 2500 Cummins - Mod List ~+~ Pulling 2000 Jayco Eagle 296 FBS ~+~ 1996 Dodge Ram 1500 5.9L V8 - Mod List
Last edited by Mopar1973Man; 02-08-2012 at 04:01 PM.
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02-08-2012, 04:26 PM
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#24 (permalink)
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Senior Member
Join Date: Aug 2011
Location: LA/MS
Name: bob
Posts: 1,464
Ram Year: 2001
Engine: 318 5.2l
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I want to get one of those gauges.
would probably pay for it self rather quickly if you (I) could learn to drive from it.
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2001 RAM, 5.2l, 5" LIFT, 33" BFGs, 100 wt yellow fogs, all base model
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02-08-2012, 08:36 PM
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#25 (permalink)
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Cummins Diesel Section Mod
Join Date: Aug 2011
Location: New Meadows, Idaho
Name: Michael
Age: 41
Posts: 719
Ram Year: 1996, 2002
Engine: 1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
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Originally Posted by rambob
I want to get one of those gauges.
would probably pay for it self rather quickly if you (I) could learn to drive from it.
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Worth every penny... Yes you'll learn that your driving style, mods, tuning, etc. all have a effect on MPG's. Funnier yet the ScanGauge II is more accurate than hand math because the SGII is calibrated and corrected for both speed / distance and fuel flow with my mods. Where my speedometer is off by 0.5 MPH so the odometer is off by about 20-30 miles per tank.
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Michael Nelson - RamForum.com Cummins Moderator 2002 Dodge Ram 2500 Cummins - Mod List ~+~ Pulling 2000 Jayco Eagle 296 FBS ~+~ 1996 Dodge Ram 1500 5.9L V8 - Mod List |
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02-09-2012, 01:07 AM
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#26 (permalink)
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Senior Member
Join Date: Oct 2011
Location: Pittsburgh/State College
Name: Cody
Age: 21
Posts: 2,722
Ram Year: 2005
Engine: 5.9 Cummins
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Originally Posted by Mopar1973Man
Here you go...
Gasoline 116,090 BTU per gallon / 3.919 = 29,622 BTU per dollar
Diesel 133,000 BTU per gallon / 4.099 = 32,446 BTU per dollar
Diesel still is a better deal...
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This caught my attention so I looked into a little bit more. Pressure and temperatures a big variables on both fluids. I double checked the NIST values with the AFDC values, gasoline Is 116,090 btu and diesel is 128,450 btu
The current national average of gasoline is $3.483 so 33,330.4622 btu/dollar
Average of diesel is $3.888 a gallon so 33,037.5514 btu/gal
Unfortunatley the government will always tax diesel fuel so it's price per btu is similar/ less efficient then gasoline
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02-09-2012, 10:07 AM
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#27 (permalink)
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Cummins Diesel Section Mod
Join Date: Aug 2011
Location: New Meadows, Idaho
Name: Michael
Age: 41
Posts: 719
Ram Year: 1996, 2002
Engine: 1996 Dodge 1500 (V8-5.9L) & 2002 Dodge Ram 2500 (5.9L Cummins)
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Careful with the diesel BTU value it varies in repect to cetane level...
Using ASTM testing scale for my local summer and winter fuels... Lower the cetane the more BTU's. 
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Michael Nelson - RamForum.com Cummins Moderator 2002 Dodge Ram 2500 Cummins - Mod List ~+~ Pulling 2000 Jayco Eagle 296 FBS ~+~ 1996 Dodge Ram 1500 5.9L V8 - Mod List |
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02-09-2012, 10:21 AM
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#28 (permalink)
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Senior Member
Join Date: Aug 2011
Location: LA/MS
Name: bob
Posts: 1,464
Ram Year: 2001
Engine: 318 5.2l
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if your odometer is off due to larger tires, the hand figures off in what direction?
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__________________
2001 RAM, 5.2l, 5" LIFT, 33" BFGs, 100 wt yellow fogs, all base model
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02-09-2012, 02:19 PM
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#29 (permalink)
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Senior Member
Join Date: Oct 2011
Location: Pittsburgh/State College
Name: Cody
Age: 21
Posts: 2,722
Ram Year: 2005
Engine: 5.9 Cummins
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Maybe with your additives, in that case you have to consider * API gravity, distillation range, sulfur content, stability and flash point to determine BTU content since cetane isn't a measure of fuel quality.
ASTM is not the standard for energy properties NIST is. ASTM did set the standard cetane level at 40 in north America (which is the minimum level recommended by almost all diesel engine manf.) using different cetane levels then the manufacturers doesnt always result in better efficiency. Any graphs I've ever seen no. 2 diesels performance and efficiency both plateau at 55.
Hopefully this works, this is from the dept of energy and matches NIST
http://www.afdc.energy.gov/afdc/progs/fuel_compare.php
Do you have a link for that graph or the information. I'd like to look into it more
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02-09-2012, 02:49 PM
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#30 (permalink)
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Senior Member
Join Date: Aug 2011
Location: Lancaster, TX / Winchester, VA
Name: Rick
Age: 44
Posts: 485
Ram Year: 2001
Engine: 5.9L CTD 24v 6 hole Bolt-action
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Originally Posted by Mopar1973Man
Knowing you've got larger tires how are you getting your distance number correct?
Percentage offset or using a GPS?.
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Before I got the Edge Juice w/Attitude, I noticed that my larger tires vs speedo wasn't linear.. sub 30-35mph, the speedo was on the money with the gps. as I went faster, the speedo started to lag.
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'01 QCSB 5.9L Cummins - 6speed, Edge Juice w/Attitude, BHAF, 5" Diamond Eye TBE
'96 SCLB 5.9L Cummins - #10, BHAF, 4" DP, 7" Miter Stack, Leveler, 4500, M275s, Jake
'03 QCSB 4.7 2WD - all original, 98k mi., dual exhaust - My late father's truck. RIP, pops! 4/11/36 - 3/26/11
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