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4:30 v. 4:88 '08 F450 tow capacity...

 
  #16  
Old 01-29-2007, 01:52 PM
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https://www.fleet.ford.com/showroom/...ng/default.asp

Here is the 08 towing guide from the Ford Fleet page....
 
  #17  
Old 01-29-2007, 01:54 PM
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Its there...go to Ford fleet.com...click on showroom...you will see towing guides.
 
  #18  
Old 01-29-2007, 01:55 PM
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  #19  
Old 01-29-2007, 03:03 PM
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Done deal, now we need to find a driver
Originally Posted by 1968gtcs
Why sure, but keep in mind we will be ruffing it. 37" wide screen TV, 22cubic in refer for the beer, leather reclining chairs, fireplace, and if I can figure out how to put the hot tub in the basement on the slide out shelf. Yep we will be rufffing it..
 
  #20  
Old 01-29-2007, 04:41 PM
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The link willl work if you remove the "s" from "https"
It is the same one that
http://www.sunrisefordfleet.com/pdfs/misc/2008%20Tow%20Guide.pdf
Has posted.
 
  #21  
Old 01-30-2007, 11:07 AM
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Ford has all the updated info on fordvehicles.com. Navigate to the 08 information video. Then click on configuration. On the configuration page there is a tab on the upper right hand corner that refers to a PDF format download. This has the detailed infor that everyone is looking for. It was just updated a few days ago.
 
  #22  
Old 01-30-2007, 11:08 AM
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Also Kelly Blue Book now has the pricing etc. on their web site.
 
  #23  
Old 01-30-2007, 01:01 PM
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Originally Posted by DFord79
Ford has all the updated info on fordvehicles.com. Navigate to the 08 information video. Then click on configuration. On the configuration page there is a tab on the upper right hand corner that refers to a PDF format download. This has the detailed infor that everyone is looking for. It was just updated a few days ago.
Cool, looks like the pdf of the brochure
 
  #24  
Old 01-30-2007, 04:28 PM
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Originally Posted by Percys Armory
Done deal, now we need to find a driver
This article showed the 450 pulling the hotel...
pickuptruck.com
Gives you an example of what it will look like.
 
  #25  
Old 01-30-2007, 04:31 PM
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Originally Posted by Percys Armory
Done deal, now we need to find a driver
This article shows the 450 pulling the hotel.
pickuptruck.com
At least you get an example of how it looks going down the road.
 
  #26  
Old 01-30-2007, 09:35 PM
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Is there any reason why one couldn't buy the 4.30 geared truck and gear it to 4.88? I realize cost is the obvious issue, but still don't see the rationale of detuning the motor as a result of lower gears.
 
  #27  
Old 01-31-2007, 12:36 AM
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Why did Ford detune the Super Duty's with the 4.88 gear ratio?
 
  #28  
Old 01-31-2007, 12:52 AM
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Originally Posted by Customz
Is there any reason why one couldn't buy the 4.30 geared truck and gear it to 4.88? I realize cost is the obvious issue, but still don't see the rationale of detuning the motor as a result of lower gears.
I bet ford has changed the rpm /mph curve and thus buy doing that its not in its peak power band anymore so it losses alittle bit hp/trq but gains alittle more fuel economy by doing so.The engine is resting somewhat but the 4.88 gears are making up the diffrence with the easier rotational inertia. It essentially is not forced as hard with the 4.88 gears once rolling as would be with the non-detuned engined 4.30 gears
This truck is intended for open interstate(mostly) and 4.88 gears will drink that gas if the rpm curve was not changed accordingly as they have done.

Its a semi with a bed ..
 

Last edited by jaybird; 01-31-2007 at 12:57 AM.
  #29  
Old 01-31-2007, 01:21 AM
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Pulling a 24,500 pound trailer the 4.88 geared truck would get the better fuel economy than the more powerful non-detuned engine 430 geared truck and the 4.88 geared truck would pull the load up a hill faster.

When pulling only a 12,500 pound trailer the 4.30 geared truck and the 4.88 geared truck would both get the same fuel economy and both would crest the hill at the same time but the 430 geared truck would be taking the lead.

Pulling a trailer weighing less than around 12,500 then the 4.30 non-detuned engined geared truck would get the better fuel economy and get up the hill first before the de-tuned engined 4.88 geared truck would.

When choosing between the detuned engine(4.88) or the non-detuned engine(4.30) you need to decide what weight trailer you will be hauling.
Picking the right one will save you gas money and some travel time over the road also the engine would be more appropriately in its peak best running tuned power band for that load and the engine will thank you with longevity..
 

Last edited by jaybird; 01-31-2007 at 01:29 AM.
  #30  
Old 01-31-2007, 08:51 AM
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Pulling a 24,500 pound trailer the 4.88 geared truck would get the better fuel economy than the more powerful non-detuned engine 430 geared truck and the 4.88 geared truck would pull the load up a hill faster.

When pulling only a 12,500 pound trailer the 4.30 geared truck and the 4.88 geared truck would both get the same fuel economy and both would crest the hill at the same time but the 430 geared truck would be taking the lead.

Pulling a trailer weighing less than around 12,500 then the 4.30 non-detuned engined geared truck would get the better fuel economy and get up the hill first before the de-tuned engined 4.88 geared truck would
I trust you tested all these scenerios...

How do you know they changed the HP/TQ curves?

I'm willing to bet that both motors make peak torque at 2000 rpm.
 

Last edited by Customz; 01-31-2007 at 08:54 AM.

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