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6.4L Power Stroke Diesel Engine fitted to 2008 - 2010 F250, F350 and F450 pickup trucks and F350 + Cab Chassis

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Old Jun 12, 2007 | 04:37 AM
  #301  
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FORDSINCE76
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Nipperdog do you have the 4x4 or the 2 wheel drive? There's an awful spread in mpg here even for same gears.
 
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Old Jun 12, 2007 | 10:23 AM
  #302  
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Nipperdog
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Originally Posted by PHWLEE
Nipperdog, is your single axle a DRW or a SRW 2 wheel drive?
SRW 4X4
 
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Old Jun 12, 2007 | 01:25 PM
  #303  
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Doh...... I was hoping to see a DRW....... I guess a DRW will get slightly less MPG's.
 
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Old Jun 12, 2007 | 07:17 PM
  #304  
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I've got 700 miles on a 2008 F-450 6.4 with 4.88 and country road mileage is 12.5.
Got to say with the power this truck has I wish I would have gotten the 4.30 rear end.


Please explain
 

Last edited by IB Tim; Jun 13, 2007 at 05:34 AM.
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Old Jun 12, 2007 | 08:58 PM
  #305  
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Originally Posted by jam105
I've got 700 miles on a 2008 F-450 6.4 with 4.88 and country road mileage is 12.5.
Got to say with the power this truck has I wish I would have gotten the 4.30 rear end
That's 700 miles since you got the new truck......or 700 miles per tank?? And I can imagine about the gears. I am thinking 4.10's for my F350 CC DRW when I go to order it. But hey, can't complain about too much power. Better to have it than not.
 
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Old Jun 13, 2007 | 05:12 AM
  #306  
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jam105
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From: In My Mind
Originally Posted by PHWLEE
That's 700 miles since you got the new truck......or 700 miles per tank?? And I can imagine about the gears. I am thinking 4.10's for my F350 CC DRW when I go to order it. But hey, can't complain about too much power. Better to have it than not.
I've put a total of 700 miles on it at this point...
 
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Old Jun 13, 2007 | 05:34 AM
  #307  
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Originally Posted by jam105
I've got 700 miles on a 2008 F-450 6.4 with 4.88 and country road mileage is 12.5.
Got to say with the power this truck has I wish I would have gotten the 4.30 rear end.


Please explain
Please explain...
 
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Old Jun 13, 2007 | 05:42 AM
  #308  
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firehawk198
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From: Central Massachusetts
Originally Posted by PHWLEE
That's 700 miles since you got the new truck......or 700 miles per tank?? And I can imagine about the gears. I am thinking 4.10's for my F350 CC DRW when I go to order it. But hey, can't complain about too much power. Better to have it than not.
Can someone tell us for sure what rpms the 6.4 runs at 65mph with 4.10's.
My 450 with 4.30s runs at 2100 rpms. 4.10s should be 2000 rpms at 65 mph? Magic number for fuel milage for my experience has been to run just under that 2000 rpm
 
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Old Jun 13, 2007 | 10:35 AM
  #309  
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Originally Posted by firehawk198
Can someone tell us for sure what rpms the 6.4 runs at 65mph with 4.10's.
My 450 with 4.30s runs at 2100 rpms. 4.10s should be 2000 rpms at 65 mph? Magic number for fuel milage for my experience has been to run just under that 2000 rpm
Those numbers should be just about right. 3.73's at 65MPH is about 1700-1800RPM's, 4.30's is at about 2100RPM's. The 4.10's should be right around 2000RPM's. Yes, keeping the tach at or under that 2K mark, which would bring you to a cruising speed of about 60-65mph will give you the best fuel economy.
 
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Old Jun 13, 2007 | 11:18 AM
  #310  
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Did any one read the article in the new Diesel Power magazine that tested the 6.4 and the v10. They showed a hwy MPG over 19 and combined was in the 15-16 range. They had an extra cab with the 3.73 rear-end so these trucks should get near the 6.0 in MPG. Oh by the way it beat the v10 in every test situation (Duh) and it almost doubled it in fuel mileage....

Food for thought!!
 
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Old Jun 13, 2007 | 05:04 PM
  #311  
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Originally Posted by Admin
Please explain...
I would have gotten better MPG with a different gearing
 
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Old Jun 13, 2007 | 07:38 PM
  #312  
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Not that ......the statement I highlighted in bold

Got to say with the power this truck has
 
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Old Jun 13, 2007 | 07:43 PM
  #313  
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jam105
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Originally Posted by Admin
Not that ......the statement I highlighted in bold

Got to say with the power this truck has
With the amount of power the truck has I could have gotten a different rear end gearing and saved a little MPG's...Truck has a ton of power..Is very strong.....I do not see the need for the 4.88 gearing for pulling 17K
 
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Old Jun 13, 2007 | 07:50 PM
  #314  
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Cool now I understand your statement....tanks
 
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Old Jun 13, 2007 | 08:18 PM
  #315  
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jam105
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Originally Posted by Admin
Cool now I understand your statement....tanks
Do not get me wrong..I like the power and it is a great truck....I went from a 2004 F-250 with the 6.0 and I have to say the ride is unreal compared to the 250...I would have thought it would be a real ruff ride...What a surprise..I can also hear the radio now!
 
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