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Tool Talk Discussion Forum

Dodge/Cummins

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Ohio Case

08-19-2005 17:15:54




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Not a tool question but with fuel prices through the roof I was wondering if anyone has found a good aftermarket system to increase fuel mileage on a 99 dodge 4x4 diesel automatic, don't need all the power, just better mileage. Thanks




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Tig Welder

08-23-2005 03:26:35




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
I have a 99 CTD.3500 with the auto transmission,
and a 3.54 gear ratio.With the stock setup it would do 15-17mpg.Now it has a superchip tuner and K&N filter setup and I can get 18-19 mpg.As long as I drive in a normal fashion,but around here to many punk's in mini crappers that need smoked..... ..... ..... .Real trucks don't have spark plugs!!!!! !



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fox

08-24-2005 17:22:23




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 Re: Dodge/Cummins in reply to Tig Welder, 08-23-2005 03:26:35  
Many Dodge/Cummins guys have increased their mileage and power with the addition of RV 275 injectors and a plug-in box called the E-Z , made by Edge products.
20 mpg is attainable, running light, and highway.
You can often buy the injectors on E-bay for $200. The plug-in box will cost that also.



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ScottT

08-20-2005 19:49:41




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
Homemade biodiesel or using waste vegetable oil (wvo) for fuel won't increase your mileage, but, it will substantially reduce your fuel cost.
I've been running wvo in my 2000 Ford since June. I still buy diesel, ($88 for a full tank) but now it lasts me well over 1500 miles.

Scott



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xragman

08-20-2005 14:56:56




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
only 3 ways I know to increase mpg
1 turn it off when not useing
2ligthen load
3learn to drive without useing brakes trucks use fuel making speed;so use this stored energy to advantage. all 3 of these together won't make a noticeable differance, on most trucks.



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Turn It Off

08-20-2005 08:55:10




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
I have often encountered this question but could not always hear it because of the rattling and knocking coming from their truck while they were in doing their business.



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T_Bone

08-19-2005 22:25:25




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
Hi OC,

I'm not fimular with the 99CTD but normally you can get a slight increase by advancing injection pump timing by just a very small amount. You might want to do some research if there's any side effects with that engine.

On my VW diesel, this was about 1/32" advance from the normal timing mark that yielded a 4mpg increase. Keep in mind that increase was from 48mpg to 52mpg so your increase might not even be noticeable. T_Bone

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hawaiirocky

08-19-2005 21:21:20




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
Just yesterday a guy told me he's been having very good results using bio-diesel (used cooking oil.) It's cheaper than regular fuel now, and he thinks he gets almost double the milage. Problem is that only one place in the state sells it.



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T_Bone

08-19-2005 22:16:45




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 Re: Dodge/Cummins in reply to hawaiirocky, 08-19-2005 21:21:20  
Hi Rocky,

Boy how I wish bio-diesel would produce double the mileage. Typical biodiesel is about 127000btu and #2d is 134000btu/gal so with less energy content you get slightly less fuel mileage, about 2mpg average from most reports I've been reading.

T_Bone



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JL Sargent

08-19-2005 19:15:45




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
One way is to adjust the valves lean. On my 95" cummins they recommended "running the valves" every 70K miles. Supposedly the length of the valves changes after a while. Anyway, my neighbor at the time worked for cummins as a mechanics instructor and he told me that you could increase fuel economy or increase HP with the valve adjustment as he and I ran the valves on my truck.



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mlm

08-20-2005 14:58:20




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 Re: Dodge/Cummins in reply to JL Sargent, 08-19-2005 19:15:45  
could you explain what you mean by adjust the valves? You mean intake and exhaust?



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slow down

08-19-2005 18:29:37




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 Re: Dodge/Cummins in reply to Ohio Case, 08-19-2005 17:15:54  
Put a piece of 2X4 under the foot petal.



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