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Pickups Diesels Diesel Fuel Economy and chips
391 messages, Last post on Oct 28, 2009 at 4:28 AM
You are in the Diesels Forum. Your Host is kcram
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Replying to: nuclear1 (Dec 31, 2007 6:07 pm) On the other hand, I have a 2006 Dodge Ram Megacab 2500 4x4 that is getting me 22 mpg on my daily commute to/from work. Chris |
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Replying to: nuclear1 (Dec 31, 2007 6:07 pm) |
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Replying to: nuclear1 (Dec 31, 2007 6:07 pm) |
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I bought a 2006 Dodge Ram 3500 with a 5.9 litre diesel this summer. It's a 4x4 automatic. without a tonneau cover this summer I was still able to get 23mpg with it. I upgraded the to a K&N cold air intake, had the cat convertor taken out, and put 20" wheels on it to reduce my rpm's at highway speed. All the articles I read said this should give me between 4-8mpg improvement. It actually dropped! And with a tonneau which in itself is supposed to add up to 3mpg! Any thoughts? I can't chip it yet as I'm told it will void my warranty.
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Replying to: joepajamas (May 30, 2005 1:10 pm) |
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I bought a 97 diesel suburban 4x4 at an auction as a non runner. Amazing shape! It runs but no oil pressure. I'm planning a rebuild and would like to make it as fuel efficient as possible. Any ideas as to what components I can change while I have the engine apart to achieve this? Cam is all I can think of. Any input would be greatly appreciated! Also, anybody who knows of a good place to get a rebuild kit would be handy as well. I have found several online but they vary in price so much it's hard to know if it's a good deal or pile of crap. Thanks in advance!
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Replying to: steergazer (Jan 14, 2008 11:48 am) Changing to 20" wheels could possibly make a difference in true mpg when the vehicle was lightly loaded if the new tires had a higher overall diameter at the tread, but the odometer and speedometer would read lower than the true value unless you recalibrated to the new wheel diameter. Did you? If the K&N cold air intake had some features that could possibly make a significant difference compared to the stock setup, don't you think Chrysler would have incorporated these features into their design? By modifying the air induction you may have caused the intake sensors to cause the ECM to add more fuel than in the stock set-up. Taking out the catalytic converter to reduce exhaust backpressure could also mess up the engine controls. Isn't there feedback to the ECM from sensors having to do with the catalytic converter? Not to mention that it is illegal to remove the catalytic converter. Experimental studies (including one on the TV show Mythbusters) have shown that an empty pickup bed with the tailgate up has less aerodynamic resistance than with the tailgate down or removed, or with a tonneau cover. However, a tonneau cover will at least keep your stuff from blowing away and from getting rained on. Go back to stock and forget about the chips.
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Replying to: jim314 (Jan 14, 2008 12:20 pm) |
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Replying to: cflowers (Aug 30, 2005 2:41 am) |
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Replying to: rustedhogger (Oct 08, 2005 6:59 am) |
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