Join Date: Jan 2013
Feedback Score: 0 reviews
GGE- Gas Gallon Equivalent.
GGE Calculated for Gasoline in US Gallons at 114000 BTU per Gallon
Fuel - Liquid, US Gallons GGE GGE % BTU/Gal
Gasoline (base) 1.0000 100.00% 114,000
Diesel #2 0.8800 113.64% 129,500
Biodiesel (B100) 0.9600 104.17% 118,300
Bio Diesel (B20) 0.9000 111.11% 127,250
Liq natural gas (LNG) 1.5362 65.10% 75,000
Liq petroleum gas(LPG) 1.3500 74.04% 84,300
GGE calculated on Non-Liquid Fuels
Fuel - Non Liquid GGE GGE % BTU/unit
Gasoline (base) 1.0000 100.00% 114,000 BTU/gal
Comp nat gas(CNG) 126.67 cu ft 114,003 BTU/126.67 cu ft
(####s pulled from Wikipedia, so I cannot attest to their accuracy.)
Gasoline engines can run dedicated CNG, diesel engines must run dual fuel to achieve ignition. Normal ratios are anywhere from 20%D80%CNG to 35%D65%CNG.
The only problem with the CNG conversion is the DEF and emission systems. While on CNG, DEF is consumed at twice the rate compared to 100% diesel. For the dual fuel system to function properly, the DEF must be turned off with a tuner, which voids warranty. (I have spoken with a Service Manager of a stealership who said he has already converted his 6.7 Scorpion to DNG. I did not see it with my own eyes. I guess he would be the one to make the call on warranty work, so he is in the clear? To back up 12superduty, the Service Manager also claimed a jump in MPG from 20mpg on deisel to 37mpg on DNG. The DNG conversion company I am using is also claiming similar number on their,already converted, 6.6 Duramax[s] and 6.7 Cummins.) Note: I may have gotten the size of the Cummins wrong. I do know it is a Cummins pre-DEF, so it may not be the 6.7. I am not a Dodge guy.
I have heard talks of increased horsepower and torque along with the increased MPG on DNG. I am skeptical. We shall see soon.
Regarding the warranty: The conversion company I am using has a petition in with the EPA and Ford. If the EPA says its cool to circumvent the DEF and emissions systems, Ford will allow conversions on their diesels without voiding the warranty. The EPA needs to be convinced DNG burns cleaner then diesel. (So I am told by the conversion company owner.)
Regarding the MPG increases: There are some funny numbers floating around. There are different ways to extrapolate the MPG, similar to differing account methods. I just hope the MPG increase numbers are not coming from accounting methods similar to what our federal government uses, if you know what I mean.
Last edited by GAZ69OK; 03-01-2013 at 01:12 PM.
Reason: glaring grammatical errors