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

 
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post #1 of 6 Old 09-20-2008, 02:43 PM Thread Starter
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Spartan Question

Greetings; Just purchased a 2008 F450 last month. Concerned w/MPG. My Duramax achieves above 25 mpg highway unloaded on a regular basis. The F450 does 11.5-12 mpg highway unloaded on a regular basis. Question is if I add a spartan, leave everything stock (DPF/CAT, etc.) and work toward mpg's what if any impact to mpg's can I expect? Does anyone have experience using a spartan in this type of configuration?

Thanks,

Chris
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post #2 of 6 Old 09-20-2008, 03:18 PM
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spartan has a forum on their website and there is a thread for non dpf/cat delete's and their mpg's. i don't know how to add a link here for you or i would. the mojority of your mpg's come from removing the dpf so unless you are looking for extra power i think you'll be dissapointed. i have a F 250 with the full delete and the best ive ever seen is 23.5.
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post #3 of 6 Old 09-20-2008, 03:22 PM
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You don't specify anything about the 2 trucks like rearend gears or model years. An older duramax would get extremely better mileage then an 08 F450.

To answer your question, in my opinion, you can not run a tuner, leave the DPF installed, and not have major problems down the road. You are going to clog the DPF and have to replace it. If you want better mpg on the new trucks, no matter what manufacturer, you are going to have to remove the DPF. The use of diesel during regeneration has to be stopped and you have to get rid of the backpressure from the DPF. Ford, Chevy, Dodge, VW, it does not matter, the new EPA laws are there and we have to deal with it or mod. it and deal with the consequences (sp.).

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08 F350 6.4 auto, XL Supercab 4x4, camper & tow
95 F150 4.9 (300ci)
03 VW Jetta TDI (52.9 mpg lifetime) 183,000mi.
69 3/4 ton 4x4 Camper Special, 390ci.
53 Ford Golden Jubilee tractor (miles unknown)
00 John Deere 790 tractor/3 cyl. yanmar diesel/102hrs
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post #4 of 6 Old 09-20-2008, 03:35 PM Thread Starter
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I understand this truck will never perform MPG's like my older duramax...I was hoping to bring it up to high teen's however if zero MPG gains and/or plugging the DPF is what would occur then I will leave it as is for the time being. Thank you both for the input!!

Chris
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post #5 of 6 Old 09-20-2008, 04:52 PM
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F450 = approx 10-11+/-mpg. w/ spartan 250 tune. 20+ mpg is f'n silly talk!

2008 F450 Kings Ranch - Black/Gold Dually-Fully Loaded, Spartan Phalanx Tuner-Fully Loaded, DPF Delete, AFE Stage II PG-7, 160 Gallons of Fuel, Big Woody!
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post #6 of 6 Old 09-20-2008, 05:12 PM
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Chris: If it makes you feel better, I have a 1995 F150 that only gets 16 mpg. It isn't as bad as what some folks think. Granted it's a little older but what the heck, it gets my wife down the road.

737tdi

08 F350 6.4 auto, XL Supercab 4x4, camper & tow
95 F150 4.9 (300ci)
03 VW Jetta TDI (52.9 mpg lifetime) 183,000mi.
69 3/4 ton 4x4 Camper Special, 390ci.
53 Ford Golden Jubilee tractor (miles unknown)
00 John Deere 790 tractor/3 cyl. yanmar diesel/102hrs
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