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Old Jan 21, 2010 | 10:45 AM
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TRAINHORNMAN
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From: SOUTH TAMPA
ITT: DP and MPG
So i been calculating.

With out the chip on 42s i used to get like 11-12.8
With the chip I got like 11 point something

I upgraded to 44..going from 15 wide to 18 wide tires.. with the chip still gettin the same thing.

Now without the chip on 44 gettin the same thing..

Im ALWAYS smashin and dashin...

How can that be..no matter what im gettin between 11 and 12?
 
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Old Jan 21, 2010 | 10:52 AM
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From: Carhenge
Welcome to what's known as "reality".

I should be getting 30mpg from all my mileage improving mods.
 
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Old Jan 21, 2010 | 11:04 AM
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From: SOUTH TAMPA
No no not comapling at allll what im saying is I upgraded tires and smash it with the chip now and still remains the same?

i thought it would go down?
 
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Old Jan 21, 2010 | 11:14 AM
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I have always gotten 12-14 with my mods... From stock injectors to hybrids... Is what it is...
 
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Old Jan 21, 2010 | 02:28 PM
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Have you got your speedo/odometer figured out? or are you using a GPS?

With my 40's it is right at 11.7-12 mpg. I bet if I regeared to 4.30's I would get a little better.
 
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Old Jan 21, 2010 | 03:44 PM
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From: SOUTH TAMPA
what i do is... record how many miles i went for example 250

250x 1.38(because of 44s)= 345 actual miles

345 divided by 28(#of gallons i filled my truck up) = 12.32 mpg
 
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Old Jan 21, 2010 | 06:18 PM
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Do you have a 3.73 or 4.10 in the rear? The 3.73 will kill you if you do lots of start/stops and heavy take offs. My guess is thats pretty good MPG for tires that big with the way you drive.
 
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Old Jan 22, 2010 | 09:08 AM
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oh ya definitely good mpg with tires and lift that big.

to be honest i havent checked..as in someone could of already regeared it.. i think i have the 3.73 tho
 
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Old Jan 22, 2010 | 09:22 AM
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Originally Posted by TRAINHORNMAN
oh ya definitely good mpg with tires and lift that big.

to be honest i havent checked..as in someone could of already regeared it.. i think i have the 3.73 tho
When you're driving down the highway, 60mph, what rpm's are you running?

If you're around 1750 ish probably 4.10.

If you're around 1500 ish probably 3.73.
 
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Old Jan 22, 2010 | 09:30 AM
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From: SOUTH TAMPA
I know when im going 70 actual mph and the speedometer is reading like 62... its running around 1700 i will have to check that again
 
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Old Jan 22, 2010 | 09:35 AM
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you have 3.73.
 
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