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Pickups Diesels Diesel Fuel Economy and chips
384 messages, Last post on Apr 04, 2009 at 8:28 AM
You are in the Diesels Forum. Your Host is kcram
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Replying to: ingarage (Mar 22, 2009 1:52 pm) As far as the truck itself as a daily driver, a Ram MegaCab is probably not your best option only because the 3.42 axle was only introduced in the last couple of years, and only available on the automatic for 2009. Otherwise, you're looking at the 3.73 with Dodge. I have a Quad Can 4x4 dually with 3.73s, and while I can break 20, I doubt that, even with a 2WD MegaCab over my 4x4 Quad Cab, you would be consistently able to crack 24. You'd be close. If you truly need all the rear seat space, your best option is a Ford Crew Cab with the 7.3, single rear wheels, the shortbed if you can manage it, and the lowest-numeric axle. And again, you'd be close to your 24 mpg, but no guarantees of keeping it there. kcram - Pickups/Wagons Host
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Replying to: kcram (Mar 22, 2009 7:26 pm)
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Replying to: ingarage (Mar 22, 2009 9:12 pm) The tallest Ford ratio is a 3.73, so you will need to look for a very light configuration... Ford does make a shortbox dually crew cab, bit they are VERY hard to find, as not many people ordered them. kcram - Pickups/Wagons Host
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Replying to: kcram (Mar 24, 2009 6:10 pm) If fuel economy is mostly an rpm thing, why not just add an overdrive or change axle ratios on any 5.9?
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Replying to: ingarage (Mar 24, 2009 10:07 pm) In getting the best mileage from a diesel, you want the rpm as close to the torque peak as you can get for the typical road speed... for a Cummins, that sweet spot is right around 1600-1700 rpm. But since you're driving 65-70 mph, you will need the tall 6th gear of the 6-speed automatic along with that 3.42 axle, or you would need a much older truck (12-valve mechanical Cummins from 1998 or earlier). I had a 1996 Ram 3500 Club Cab 4x4 dually, 4-speed automatic, 3.54 axles and OEM tires (LT215/85R16E). I could get 24 mpg out of it, but to do it, I had to keep my cruise control at 55. At the same speed, my 2005 Ram 3500 Quad Cab 4x4 dually with 3.73s and LT235/80R17E tires will get around 21. kcram - Pickups/Wagons Host |
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Replying to: jay7805 (Mar 05, 2009 4:24 pm) Good luck to all |
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Replying to: redbearde (Mar 20, 2009 8:34 pm) |
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Considering trading my '06 F250 SD/SC gasoline for an ' 08 F250 4wd SD/CC diesel. Never owned a diesel before. only considering because of the deep discounts on '08. Thoughts? experiences? Is mpg that much better than gas?
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Replying to: jet12 (Apr 03, 2009 9:26 pm) It depends on what you are going to do with the truck. My gasser worked great as a grocery getter, but didn't do well at all climbing over the Sierras with our travel trailer. My "new to me" duramax requires caution to not go uphill too fast with the trailer. Awesome. Amazing. I'm REALLY enjoying it. |
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Replying to: jet12 (Apr 03, 2009 9:26 pm) |
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