Towing mpg stock vs deleted - info needed - Ford Powerstroke Diesel Forum
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Old 11-14-2011, 01:20 PM
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Towing mpg stock vs deleted - info needed

I traded my 2007.5 6.7L dodge 2500 with a 4" turbo back and the H&S XRT on it, for a 2010 F350 SW 4x4 LWB 6.4L last year. I am very familiar with the deletes and working on these trucks. I have been searching and reading through the forum and haven't found exactly what I am looking for.

My truck is pulling 7-10,000# 85% of the time on a flat bed trailer.

Currently stock I get 15-16 mpg unloaded HC, and 7-9 mpg Loaded HC. The biggest issue I see is that my truck is at 20 psi boost minimum all the time I have my trailer hooked on. Unloaded It is 8-10 psi. Even if my trailer is empty I am at 20 psi and then up to 35 psi for any little hill. I run from Houston to Sonora pretty regularly and the mileage is killing me. I drove down with around 11,000# this weekend and got 8.2mpg HC. I drove back with the trailer empty and got 8.4 mpg HC???? The drive down had a 1000# feeder sticking up 13' in the air. Makes no sense to me.

When I did the deletes on my dodge I went from 9 to 13 mpg pulling the same load I am now, driving 70-75 mph. Can I expect this kind of gain by doing the deletes on the 6.4L?

For a strictly towing purpose is the XRT pro or mini max the best option?

What is the best tune for towing mpg? From my research it looks like the default 80 hp?

My dodge ran at 6-8 psi with this same load, My friends 6.0L runs at 10-12 psi with this same load, I run at 20 psi w/ the 6.4L.

With the XRT pro or Mini Max can you program a tune that will keep your boost lower?

Any info will help here guys. I am almost committed to doing the deletes on this one too, but I don't want to do them and not see an increase in mpg. Obviously the benefits of doing the tunes will extend the life of the motor, but I am looking for mpg increase too. Thanks.
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Old 11-14-2011, 02:51 PM
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A delete with towing from user reports, especially the sizes your talking will probably only be a couple MPG's more then what you have. An unladen truck sees the best mileage which you have probably already read from your research.

Some users have reported running the 275 tunes but it requires constant vigil of your gauges. Can't just hook up and go as comfortably as you do now. But then each tuner is different so find out what you can about two specific tunes then determine what your comfortable with.
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Old 11-14-2011, 03:09 PM
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I got about a 2 MPG gain (towing the same 18K toyhauler) after the delete/ tune. Went from 8 MPG to around 10 (sometimes less if I'm driving like an idiot, but its never went back into the 8's since the delete / tune).
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Old 11-15-2011, 05:55 AM
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Thanks for the feedback. I know on my dodge the 120 hp with mild turbo was the best for towing mpg in that truck. It took 6 or 7 trials to find it out. EGT's remained low even though the turbo was a lot milder.

What programs from H&S are they recommending for safe towing?

Does defueling at low boost help?
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Old 11-15-2011, 06:19 AM
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My friends 2008 CCLB, 6spd, 4x4 on 40" tires gained 5 mpg's from doing the full delete and a tuner. He towed around a mini excavator, total of around 14k often. His pure towing gains were from 3-5mpgs depending on driving conditions. He runs that truck hard!
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Old 11-15-2011, 07:53 AM
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I never saw those mpg nmbrs unloaded before deleting. My towing nmbrs were horrible, worse than what you stated. My driving is very mixed and I can easily put on 1000 miles a week. So when filling up, it's still fresh in my mind since I probably just filled up yesterday or within the last 36 hours. To keep things simple, I used to get about 300 miles on a tank +/- 15 miles. Now, I will easily get 500 miles +/- 50. Boost levels range from 4-8 with regular driving.


Sent from my Autoguide iPhone app
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