Free Tunes TESTED!!!!! - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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Old 07-11-2008, 01:08 AM
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Free Tunes TESTED!!!!!

Well I drive a LOT this year. Twice in the last two weeks, and several times this year. The best I have gotten from Houston to Dallas 207 miles from my house to the I-20 turn off to West Texas. My VERY best mileage was 21.9mpg @ 63 - 65 MPH cruise the WHOLE way. I D/L'd the free tunes and the MAX Economy caught my eye. I took the same route, and even though the 21.9 MPG was in December (colder) The Free Tune I am talking about snapped off a thrifty 23.6 MPG @ 63-65 MPH!!! OH This time I also added a 95 gal aux tank, and with over 900 pounds of additional fuel I still got impressive mileage. I will say that my truck was not all that happy with Max Economy for any thing other than highway driving. It shifted odd, this may just be my truck. I think I will be using the Max Economy for future trips! OH the first fillup with the new tank costs $479. There are several extremely reasonable aux or transfer tanks priced well.
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Old 07-11-2008, 01:29 AM
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23.6 thats kick ***

what brand aux tank are you using ?
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Old 07-11-2008, 05:20 AM
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thats great mileage. do you have stock exhaust and intake or aftermarket?
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Old 07-11-2008, 06:00 AM
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The shift points are probably set to shift sooner so that it will keep you in a lower RPM range. Not sure though, have not run it yet. Great mileage though. Was that with pen and paper?
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Old 07-11-2008, 11:23 AM
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Logan, that is what seemed to be happening, but the truck acted different than I was used to....

Pistol Pete, I have a FBD 4" Turbo back, and a zoodad mod cut out, and the SCT, that is all....

Sikktruk, I got it from Nothern Tool, I think it is branded RDS? I think it may be one they have made or something, but do not quote me on that. I LOVE it so far.....

Seriously the biggest secret is "Back off the F&$%ing turbo. The MAX ECON did seem to keep the turbo psi lower even on the highway, but I could be imagining things ....
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Old 07-11-2008, 11:36 AM
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That is GREAT mileage... I'd like to take my 18 mpg that I get on the hwy with the performance tune and get 20+ with my new economy tune...
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Old 07-11-2008, 06:54 PM
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That is awesome to hear! I do know those tunes do shift differently that most folks are used to, but I think if you give your truck a little time to adjust, or you may even need to adjust your shift pressures a bit, we usually do, you may end up liking it. It appears as if your mpg does! LOL
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Old 07-11-2008, 08:19 PM
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was this mileage hand calculated or did you go by the lie o' meter?
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