Fuel econ-Quartermile time - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 10 (permalink) Old 05-08-2011, 09:24 PM Thread Starter
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Fuel econ-Quartermile time

I have a icon 8in lift. I plan to run 38 15.50 or a 13.50 wide tire on a 12in wide wheel. I know fuel econ and big tires and lift do NOT go togather! But is there someone that has a 6.0 with 38 tires that could give me some feedback on the benifits and downfalls. And the quartermile with a sct race tune with the 38's.

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post #2 of 10 (permalink) Old 05-08-2011, 10:39 PM
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Re: Fuel econ-Quartermile time

if you run 38's without regearing then, well....poor fuel economy and a slow truck are all you're gonna be left with.

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post #3 of 10 (permalink) Old 05-08-2011, 11:03 PM
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Re: Fuel econ-Quartermile time

My buddy (I think he's on here, but can't remember his username) runs an 06 crew cab with a 6" lift and 37's. He runs an SCT X-cal 2 with custom tunes with Innovative extreme race, and Innovative mild tuned FICM. He ran a 14.4 back to back at Lebanon Valley in NY. He gets around 13 mpg, running stock 3.73's

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post #4 of 10 (permalink) Old 05-08-2011, 11:03 PM Thread Starter
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Re: Fuel econ-Quartermile time

I belive i have 3:73 now what gears would be ideal? My truck is on dirt more than blacktop and this winter in one night we got 34.4in of snow... You dont think ill benifit and all? I just wana see some numbers and the quartermile dif and seat of the pants dif...

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post #5 of 10 (permalink) Old 05-08-2011, 11:04 PM Thread Starter
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Re: Fuel econ-Quartermile time

Thanx mdub! That is what i am looking for

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post #6 of 10 (permalink) Old 05-08-2011, 11:08 PM Thread Starter
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Re: Fuel econ-Quartermile time

Say if i run a 20x12 wheel i wonder what the diff will be between a 37 13.50 and a 38 15.50 in mild off road and winter performance vs speed, mpg

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post #7 of 10 (permalink) Old 05-08-2011, 11:21 PM
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Re: Fuel econ-Quartermile time

The truth about snow is the skinner the tire the better lifting it and putting wider tires will only be worse.

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post #8 of 10 (permalink) Old 05-08-2011, 11:27 PM Thread Starter
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Re: Fuel econ-Quartermile time

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Originally Posted by 07_powerstroke View Post
Say if i run a 20x12 wheel i wonder what the diff will be between a 37 13.50 and a 38 15.50 in mild off road and winter performance vs speed, mpg
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Originally Posted by Jomax View Post
The truth about snow is the skinner the tire the better lifting it and putting wider tires will only be worse.
I understand that thats why i run 235 65 16 tires on my plow truck... More than likely the 13.50 is gona be better in the snow than the 15.50 but i just wana knowif anyone knows how much is all these diff....

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post #9 of 10 (permalink) Old 05-09-2011, 01:27 AM
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Re: Fuel econ-Quartermile time

I know my truck got around in the snow and ice alot better on the 285's I had on it before than the 315's I have now

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post #10 of 10 (permalink) Old 05-09-2011, 01:00 PM
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Re: Fuel econ-Quartermile time

Wide tires and wheels don't mix with snow driving. If you plan on running these all year round, I'd stick with a 37x12.50xwhatever at most.

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2006 F-250 6.0 4x4 Vegistroked
SCT Xcal2 w/Innovative Diesel Tuning 466/772 7/19/08
Black smoke don't mean it's broke... it means your tuning sucks!

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