Originally Posted by NBM
Ok I know all of this has been covered but after several searches I didn't find my answers.
I have been dragging my feet on dropping the money to make these upgrades but now is the time. I plan to do the dpf and egr deletes and add a tuner. Which tuner will get me the best fuel economy? I'm content with the stock horsepower and it's a work truck driven about 4000 miles a month.
Is a cat delete going to make much difference or is the dpf delete ok?
The egr delete there are some options what is most recomended?
I've owned this truck for a while and I think I learned more in the last 4 nights reading the forum than I have from working on it. Thanks to all that put so much time and knowledge on the forum.
The deletes will make your truck last longer. The EGR and DPF are ticking time bombs. They just put heat and crap into your engine unnecessarily.
If you are just looking to keep stock HP levels get a DPF+R device. Your fuel mileage will change minimally (probably less than 1mpg), but it will be more reliable than stock. After that, get a Spartan or H&S or SCT with custom tunes. The hotter tunes get the best mileage if you can keep your foot out of the go pedal. I have heard that leaving the CAT helps improve mileage a little because you need some back pressure (but every fiber in my engineering brain says that's BS, also the full delete pipes are cheaper than the DPF only delete pipes). Just about any EGR delete is ye same. Just get one with an elbow.
Almost all the answers to your questions and more are in the 'General 6.4 Modifications' sticky in the 'General 6.4' section.
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