Re: What do you pull your boat with?
I would agree, a 12 valve Cummins is hands down the best light truck diesel engine. I've had a local shop do $5000 in mods to a 6.0 F250 work truck, studded heads, EGR delete, coolant filters etc. etc. and even with no tuner at all the dang heads lifted. That was it for the 6.0 for me. My friends with 6.4's tell me it gets 11mpg which defeats a big portion of my motivation to own a diesel. And I don't know much about the 6.7...but after the 6.0 and 6.4, I'm now a skeptic.
That's weird that you were lifting heads on a stock tune, especially with studs. Did the truck ever overheat or anything before you had this work done? I've got a steady stream of 6.0's that come through the shop, and very rarely do I see one do what yours did and not have another issue related to a previous failure. The 6.4 gets horrible mileage from the factory, they shoot unburnt fuel into the exhaust system and ignite it to burn up the carbon, so basically when the regen event takes place your just wasting fuel. With a tuner and turbo-back exhaust with DPF/CAT delete they will get around 18-19.
Cummin=Great motor
Dodge=weak tranny and poor engineering
I will say they have eliminated most of these problems now. With new diesels you can't go wrong with a cummins or a stroker. The 6.0 was designed to target commercial customers and it did very well. have you ever noticed how many diesel company trucks are 6.0's and how many are dodge/chevy...
Part of the reason we work on so many, there are more of them out there. The newer Dodge trannies aren't so bad, and honestly it was just the auto's, their manuals are awesome.
Around here, diesel trucks don't have emission inspections, I know several guys that have removed the EPA garbage from their 6.4 trucks and the mileage and power increase is pretty impressive.
We have a customers truck that we have done some extensive work too, 600hp and 800ft/lbs fairly easily, and he gets 18-19 with it. Before hand it was stock getting 11-13, blah!
Might be different in different areas but Ford didn't put the UREA crap on there till the 6.7 liter. The 6.4 got terrible milage without that all that garbage on there. I can't imagine how bad it would be with it!
Nope, the 6.4 just shoots excess fuel into the exhaust stream and it ignites, burning excess carbon in the DPF and Cat, it's the regen cycle. It's the reason they get **** porr mileage.