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post #1 of 20 Old 12-22-2012, 06:49 PM Thread Starter
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Mileage question

Hey Folks,

I traded my 6.0 off for an 08 F350 6.4L, great truck! 67,000 miles, and loves pulling trailer. The only problem is mileage. Has 3.73 gears, 20 inch tires, nothing special. get 11-12 normal driving, city, highway, it doesnt matter, still sucks the fuel. Get about 6-7 pulling a 32ft gooseneck weighing about 19,000lbs.

Had enough of the bad mileage and gave in and bought a DPF delete and H&S mini maxx tuner. Was hoping the mileage would jump about 5mpg, thats not the case, Im getting the exact same mileage(11.4) as i was stock. Running the easy level on the tuning, i switch between the mild, wild and hot...

Do i have another issue being I have such horrible mileage? Its winter here now, so it's 0-30 out depending on the day. 5-10 mins of warmup in the morning...

Best mileage Ive seen with this truck is 12.5, that was a 4 hour trip.

Truck does not have an exhaust kit, just DPF delete. where is the pyro located on the 6.4L? And how to you get to the Trans tuning with the mini maxx, i've looked around on it and cant seem to find it.

Thanks much, Carl

2008 F350 Lariat 6.4L
AFE DPF Delete pipe
H&S Mini Maxx Tuner
Also an Allis-Chalmers Collector
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post #2 of 20 Old 12-22-2012, 06:56 PM
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First off I would check and see what firmware version is currently installed. Anything after 6.4.33 should have all the tuning options available during the download. I would then try the mild tunes and see how those work for you. I had the best mileage on the hd300 but some people have better luck on the mild. Also the easy tunes cycle the EGR system while the mild and hd300 don't. After you get the sd card updated and update the firmware on the tuner then you start the download process again and a couple minutes into the download it will ask which tranny tune you want to choose.

08 F350 JOB 1
H&S MINI MAXX HD300 W/S1M
SINISTER EGR/COOLER DELETE
6000K BEAMERS HID HEAD & FOGLIGHTS
KMC XD WHEELS W/NITTO TRAIL GRAPPLERS
2.5" LEVELING KIT
DIESELSITE COOLANT FILTER
ROTELLA EC-1 RATED COOLANT
5" DP BACK FLO-PRO EXHAUST
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CCV MOD
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AFE CAI
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post #3 of 20 Old 12-22-2012, 07:07 PM Thread Starter
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Ok, good deal. Thanks! We got it a lil over a week ago and updated it right away, so in theory, everything should be good, but i'll check. I put in the easy tuning because i wanna treat this truck with more respect then my old 6.0, figured i should try and make this one last, lol. I beat the crap outta my 6.0, loved the truck and engine though. oh well, atleast im a diesel mechanic so i'll do the work myself this time. I'll try the mild tuning and see what happens, which trans tune file is the better one?

2008 F350 Lariat 6.4L
AFE DPF Delete pipe
H&S Mini Maxx Tuner
Also an Allis-Chalmers Collector
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post #4 of 20 Old 12-22-2012, 07:22 PM
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I run the s1m. It locks the tc in 4&5. It gets a little annoying when it is locking and unlocking around the city but I use it mainly for highway driving. Also found that this tune works well with the shifting for pulling my camper. If you don't tow then I believe the s2m is the most stock feeling however I tried the s2 tunes and the tranny heated up alot faster without the 4tc lock like in the s1 tunes.

08 F350 JOB 1
H&S MINI MAXX HD300 W/S1M
SINISTER EGR/COOLER DELETE
6000K BEAMERS HID HEAD & FOGLIGHTS
KMC XD WHEELS W/NITTO TRAIL GRAPPLERS
2.5" LEVELING KIT
DIESELSITE COOLANT FILTER
ROTELLA EC-1 RATED COOLANT
5" DP BACK FLO-PRO EXHAUST
FLO-PRO CAC PIPE & INTAKE ELBOW
CCV MOD
AIR LIFT 5000LB AIR BAGS W/ONBOARD COMPRESSOR
AFE CAI
PMF TRACTION BARS
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post #5 of 20 Old 12-22-2012, 07:26 PM
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Now that I think about it, I don't believe you have an option for tranny tuning with the easy tunes. I think there is a default shift schedule it uses. When you download the mild or hd300 you should get the option for tranny tunes.

08 F350 JOB 1
H&S MINI MAXX HD300 W/S1M
SINISTER EGR/COOLER DELETE
6000K BEAMERS HID HEAD & FOGLIGHTS
KMC XD WHEELS W/NITTO TRAIL GRAPPLERS
2.5" LEVELING KIT
DIESELSITE COOLANT FILTER
ROTELLA EC-1 RATED COOLANT
5" DP BACK FLO-PRO EXHAUST
FLO-PRO CAC PIPE & INTAKE ELBOW
CCV MOD
AIR LIFT 5000LB AIR BAGS W/ONBOARD COMPRESSOR
AFE CAI
PMF TRACTION BARS
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post #6 of 20 Old 12-22-2012, 07:47 PM Thread Starter
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Ok, I'll have to play around with it some more then, I tow every weekend with it in the summer, I'll try the s1m and see how it is. I didnt give me a trans option for easy.

thanks, Carl

2008 F350 Lariat 6.4L
AFE DPF Delete pipe
H&S Mini Maxx Tuner
Also an Allis-Chalmers Collector
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post #7 of 20 Old 12-25-2012, 01:19 AM
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open highway i got the best mileage hd 300 with normal shift pattern ..... i was towing 15k ...... best mpg was 13.5mpgbut mines was a choatic trip i will never repeat


7.3 fire loss & 6.4 2008 Lariat 4x4 S&B, AFE/MBRP 4in Turbo back, H&S HD, TGC 2.5in level, 20x12 Weld Sandstorms w/ 37x13.50 SS-M16 "LOCO-motive" SOLD
2007 F350 - ELC, EGR off, torque app.
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post #8 of 20 Old 12-25-2012, 06:56 AM
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I like the S1L trans tune because it gets me the 5th gear lock at 49mph. IMO the S1M holds 4th too long (up to 54mph). I thought all the tunes cycled the EGR?

2015 F350 DRW Platinum, AirLift 5000 Ultimate & Wireless Air, Lund LED Bull Bar, RC 30" Grille LED bar, B&W 5th Wheel
2010 F250, H&S Mini Maxx, aFe PDS, Diamond Eye 4", Pro Comp Nitro 2.5", Bilstein 5100, SmittyBilt Bull Bar, Bushwacker Pocket Style, B&W Turnoverball w/ Slider, Firestone Ride-Rite, Fuel Hostage, Toyo OC M/T, Pioneer AVH-P4100DVD, Kicker 250.1, (2) JL Audio 10W0v3-4




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post #9 of 20 Old 12-25-2012, 12:09 PM
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[QUOTE=RUFFSTUFF;. I thought all the tunes cycled the EGR?[/QUOTE]

Mild and hot do not according to the insructions.


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08 6.4
H&S Mini
PTP EGR Delete
4" Diamond Eye TB
Sinister Coolant Filter
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post #10 of 20 Old 12-26-2012, 05:55 PM Thread Starter
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Well I downloaded in the Mild tuning, running the 250hp tune now, no noticeable milage gains yet, maybe it doenst like the cold weather and warms ups?

Love the shifting of the s1m trans tune though! Be interesting to see how it handles with the gooseneck.

Carl

2008 F350 Lariat 6.4L
AFE DPF Delete pipe
H&S Mini Maxx Tuner
Also an Allis-Chalmers Collector
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