04.5-05 LLY Performance Discussion of Chevy and GMC Trucks with LLY Duramax Turbo Diesel Engines Related To Performance And Longevity

Fuel Mileage we all need more of it

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Old 05-26-2011, 09:46 PM
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Default Fuel Mileage we all need more of it

I can get 20 to 23 MPG, but like power I want more.

Any Good Ideals?
 
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Old 05-26-2011, 09:51 PM
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depends on what you have on ur truck now
 
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Old 05-26-2011, 10:09 PM
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2005 Duramax crew cab 4x4
AFE Power BladeRunner Turbo Inlet Tube
with more to come
 
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Old 05-28-2011, 03:06 PM
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the most I have been able to acheive is 22mpg, that was cruise set on 60mph and over a long distance, if you want better mileage than your getting trade up to a TDI jetta
 
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Old 05-28-2011, 03:41 PM
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I get about 20 mpg cruising at 70 mph in my Dodge, which is around 500HP. My jetta gets 48 mpg at the same speed now that I've added the 17" VR6 rims, it got 54 mpg with the 15" rims. I can out run anything in the Dodge, the Jetta I've seen turtles with better acceleration.
 
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Old 05-29-2011, 06:55 AM
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Stock or smallish tires, minimal weight and drive it like there's an egg between your foot and the gas pedal. A good EFI live tune might help, but you already get better gas mileage than I ever have...
 
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Old 06-01-2011, 03:14 AM
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when it comes to diesels, more is shockingly more. upgrade your fuel system to deliver more fuel, get efi live and map your ecm to handle more fuel and air, add a extra turbo, better air delivery (intercooler, intake, intake manifold, intercooler tubes) if you are willing to go the distance and drop the money you can get 30+ mpg throw a propane kit in there and you can see numbers in the 40's
 
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Old 06-01-2011, 10:59 PM
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Originally Posted by cbsmoraine
when it comes to diesels, more is shockingly more. upgrade your fuel system to deliver more fuel, get efi live and map your ecm to handle more fuel and air, add a extra turbo, better air delivery (intercooler, intake, intake manifold, intercooler tubes) if you are willing to go the distance and drop the money you can get 30+ mpg throw a propane kit in there and you can see numbers in the 40's
this is just pure fantasy, you plan on getting the same mileage out of your 7000lb truck as a prius? NOT HAPPENING! its a TRUCK its not an ECONOBOX! 40mpg is just pure crazyness and 30mpg is pretty hard for me to believe as well, hell even 25mpg is gonna be tough, when you use propane your just replacing diesel for propane, its not saving you anything, just trading one fuel for another....
 

Last edited by BriteWhiteRam; 06-01-2011 at 11:01 PM.
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Old 06-02-2011, 04:56 PM
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not a fantasy as far as i know. ill have to look up the artical and post it but these engines can be made to run numbers like that. its going to cost a ton of cash to do it but i suppose if you are a long tim owner, it will pay off down the road. but for reals white, its totaly possible.

UPDATE: " Low-Pressure Nitrous System: Dmitri Millard- '01 Chevy Silverado 2500HD
Every year someone jokes about using nitrous on the fuel economy test, but this year someone actually did it-and that person was Dmitri Millard. He had a custom low-pressure nitrous system with a nozzle for each cylinder that was made using components from Boss Noss (www.bossnoss.com). Although the nitrous was mainly used to spool his large turbos, he found during testing that he could also achieve about 37 mpg with it. His 36.55-mpg figure backed up his earlier tests, and he was Second in fuel economy only to Matt Handwork's 45.58-mpg CNG machine." <------matt has a prophane kit

THIS CAME FROM :
http://www.dieselpowermag.com/diesel...nge/index.html

All im saying is, it can be done, and yes prophane just replacing one fuel for another, but national average cost for a gallon of propane is $2.83 right now, where as diesel fuel is averaged at $3.98 a gallon. lets say you have a 20 gallon tank (i do so thats what i'm using). you never run completely empty so lets say you put 18 gallons of diesel in your tank every time you fill up. thats $71.60 a fill. i average about 20 MPG HWY and 16 City. so ill say i avg 18 total. thats 324 miles per 18 gallons of fuel. now lets say i have a 10 gallon prophane system, and i run it dry every time i use it. so its $28.30 to fill it on top of my $71.60 for diesel for a grand total of $99.90 a fill. But with my prophane kit i am running (rough estimate) 40mpg (which is doible), that would give me 720 per fill up. It would cost me $157.52 to get the same range with just my fuel tank vs a propane system and fuel. thats a $57.62 difference. prophane system costs roughly $850.00 so it would pay for itself after 15 fill ups.
 

Last edited by cbsmoraine; 06-02-2011 at 05:27 PM. Reason: spelling/ update
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Old 06-02-2011, 05:02 PM
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Put a AD 2 165 on it, a good mileage tune from efi live, block off the egr, and air intake and see what you go from there. And is this millage hand calculated? Or off the overhead that is usally off
 


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