Spartan mileage - Ford Powerstroke Diesel Forum

6.4L Performance Parts Discussion What has or has not worked for you?

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post #1 of 16 Old 06-25-2010, 03:57 PM Thread Starter
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Spartan mileage

I purchased a Spartan Phalanx, DPF/DOC delete pipe, and S&B airbox recently. I have to admit the power it provides is truly awesome. But that was not what I purchased it for. I wanted to gain mileage. I have heard many stories about how a tuner, pipe, and CAI helped the mileage on the 6.4 greatly, so I went for it. Now I have a 2009 CC 4x4 dually with 4.10 gears. Before I bought the tuner, I was showing 11.3 on the lie-o-meter, and was getting about 12 hand calc'ed. Now the lie-o-meter is showing 18.8, which I thought was great! But alas, I have only gained about 1 to 1.5 mpg in reality.

Have others seen this situation also? By the way, I am running the 250 tune, which I heard was the best for mileage. Any help out there? would like to get the 4-6mpg gain that I've heard others talk about.

09 F350 CC DRW 4X4, 4.10, Lariat Ultimate, wide track front end
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post #2 of 16 Old 06-25-2010, 06:08 PM
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I think it all depends on how fast you drive (anything under 1700-1800 rpms is optimal) also, do you drive mostly on the interstate or in town/highway? The stop and go traffic will really affect the mileage. Ultimately, I think your 4.10 rear end (Dually) will not see the gains some claim.

Last edited by rlpzzz; 06-25-2010 at 06:12 PM. Reason: spelling
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post #3 of 16 Old 06-25-2010, 06:37 PM
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On the lie-o-meter I gained 10 mpg but hand figured I have gained about 1 mpg. I am running the 275 tune, afe intake, 4" down pipe & flo pro 5" exhaust
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post #4 of 16 Old 06-25-2010, 09:16 PM
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With 4.10 gears, your going to have to keep it around 65 mph on the highway to get decent fuel mileage. Around town there is no hope tuned or stock with those high gears. You might can manage 13 or 14 if you baby it all the time. You really need 3.73 or 3.55 gears to get good fuel mileage.

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spartan_jeff12@yahoo.com

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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post #5 of 16 Old 06-26-2010, 06:19 PM Thread Starter
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bought the truck with 4.10's to pull my 18k 5th wheel. was going by the recommended towing capacity. oh well, guess I'll have to pay at the pump. right now I feel I blew 1700 on the spartan, dpf and cai

09 F350 CC DRW 4X4, 4.10, Lariat Ultimate, wide track front end
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post #6 of 16 Old 06-26-2010, 06:21 PM Thread Starter
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by the way, anyone know why you can't register for the forums at Spartan?

09 F350 CC DRW 4X4, 4.10, Lariat Ultimate, wide track front end
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post #7 of 16 Old 06-26-2010, 06:21 PM
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You can't expect much out of an almost 9,000 lb dually with 4.10's...no matter what you try.

Jeff Dodd
spartan_jeff12@yahoo.com

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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post #8 of 16 Old 06-26-2010, 06:23 PM
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Quote:
Originally Posted by TALLROB View Post
by the way, anyone know why you can't register for the forums at Spartan?
Email Mick at tech@spartandieseltech.com

If you registered for the website, then we sent you another email out asking if you would like to become a member of our tech support forum. If you haven't registered for the site at all, then you will have to do that first and then request to be apart of the forum.

Jeff Dodd
spartan_jeff12@yahoo.com

2012 Ford F-250 Lariat CC/SB

Mods - Spartan tuned via laptop, 4" AFE stainless exhaust system, 2.5" PMF BMC leveling spacers, 3" PMF lift blocks, Fox Racing 2.0 shocks, Recon smoked mirror & cab lights
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post #9 of 16 Old 06-26-2010, 06:23 PM Thread Starter
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guess you also can't believe the claims by some that you can get 17 out of a F450 either. LOL

09 F350 CC DRW 4X4, 4.10, Lariat Ultimate, wide track front end
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post #10 of 16 Old 06-26-2010, 06:25 PM Thread Starter
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I don't remember getting the email about the forums. Any way I can get it resent to me?

Edit - found the email, and replied to it.

09 F350 CC DRW 4X4, 4.10, Lariat Ultimate, wide track front end

Last edited by TALLROB; 06-26-2010 at 06:28 PM. Reason: added content
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