7.3 or 5.9 - Ford Powerstroke Diesel Forum
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post #1 of 31 Old 11-26-2010, 02:39 PM Thread Starter
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7.3 or 5.9

I need alittle help on deciding what to get 7.3 4x4 manual f350 or a 5.9 2500 4x4 manual. I am mainly looking for best mpg which i know the 5.9 has but i rather buy a ford if i can get the same. I was wondering if i put like a 3.05 gears if the ford would get the same or better milage. Thanks for your input!
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post #2 of 31 Old 11-26-2010, 03:02 PM
duct tape & zip ties

 
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I get 18mpg everyday driving, 24 on the highway cruising. The F350 most likely has 4.10:1 gears. I would not go so low to a 3.05:1 gear ratio. In fact I would not go below a 3.73:1. My truck has 3.73:1


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post #3 of 31 Old 11-26-2010, 06:40 PM Thread Starter
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but isnt it the lower you go the better milage you get?

Last edited by diesel17; 11-26-2010 at 06:44 PM.
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post #4 of 31 Old 11-26-2010, 06:41 PM Thread Starter
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And by the way thats a bad *** buck man congrats!
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post #5 of 31 Old 11-26-2010, 06:58 PM
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Lower numerically gains mileage. Like 3.73's get better mileage than 4.10's. It's a ratio thing. 4.10 revolutions of driveshaft to one turn of axle. Engine turns more times to go the same distance so more fuel is used.

2001 F-250, CCSB, 4x4, Auto, AFE II, DP-Tuner 60T, 80E, 120R, 140A, 4" exhaust
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post #6 of 31 Old 11-26-2010, 07:12 PM Thread Starter
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so there is deffinatly a way to get just as much milage as a 5.9. cause i honestly would rather have a ford i ve been a ford man since i got into cars and trucks
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post #7 of 31 Old 11-26-2010, 07:15 PM
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Same mileage yes, but same setup probably not. Equally set up trucks (same cab config, bed length, 4x4 or 2x4, and gear ratios) the cummins will get better mpg almost every time. My 01 7.3 averages 16, my dad's 99 5.9 averages 19. Fords are heavier also which hurts their mileage.

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post #8 of 31 Old 11-26-2010, 07:17 PM
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Quote:
Originally Posted by diesel17 View Post
And by the way thats a bad *** buck man congrats!
What buck? Anyways, yes you could get mileage out of a 5.9L but you keep saying you want a Ford. Ford does not have the 5.9L.


Your Actions Today, Decide Your Future Tomorrow

2005 6.0 Crew Cab Long Box Lariat, current truck

2004 6.0 destroyed by contaminated fuel

2002 7.3L burnt
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post #9 of 31 Old 11-26-2010, 07:20 PM Thread Starter
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yeah thats what i kinda figured i thought they were more heavy. have you had any problems with your 7.3 so far?
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post #10 of 31 Old 11-26-2010, 07:21 PM Thread Starter
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yeah i know i would have to buy the dodge. and there was a buck in your pictures
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