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How much pressure (PSI) should I run in these tires?

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  #46  
Old 06-11-2014, 10:34 AM
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Originally Posted by IttyBittyX
So what? MORE in the front and less in the rear? Because of the weight of the engine?
The Ex is heavier in the rear.
 
  #47  
Old 06-11-2014, 10:35 AM
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Originally Posted by 00X7.3PSD
Yes more air in front because it's heavier in the front.
Nope...........
 
  #48  
Old 06-11-2014, 11:16 AM
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Originally Posted by EXv10
The Ex is heavier in the rear.
My 01 Ex v10 2wd GVWR is 8600lbs. GAWR Front is 4600lbs, GAWR Rear is 5250 lbs.

5250-4600 = 1250 tongue weight.

I could be be wrong Brent, but I think it's heavier in the front. Now don't tell me the 4x4 diesel is heavier in the rear.

Disclaimer: If I am wrong Brent, this is the first time I am wrong in my entire life.
 
  #49  
Old 06-11-2014, 11:24 AM
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Originally Posted by 00X7.3PSD
My 01 Ex v10 2wd GVWR is 8600lbs. GAWR Front is 4600lbs, GAWR Rear is 5250 lbs.

5250-4600 = 1250 tongue weight.

I could be be wrong Brent, but I think it's heavier in the front. Now don't tell me the 4x4 diesel is heavier in the rear.

Disclaimer: If I am wrong Brent, this is the first time I am wrong in my entire life.
I was just thinking I could be wrong and contemplating how to justify it but I was just going be Toms' weigh station slip but he might have been carrying something.
 
  #50  
Old 06-11-2014, 12:22 PM
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Originally Posted by EXv10
I was just thinking I could be wrong and contemplating how to justify it but I was just going be Toms' weigh station slip but he might have been carrying something.
Nope, that was dead empty with a full tank and no driver.

Originally Posted by 00X7.3PSD

I could be be wrong Brent, but I think it's heavier in the front. Now don't tell me the 4x4 diesel is heavier in the rear.

Disclaimer: If I am wrong Brent, this is the first time I am wrong in my entire life.
Bone stock 2000 V10 4WD Ex:

 
  #51  
Old 06-11-2014, 04:35 PM
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Originally Posted by Tom
Or you could NOT ignore all of the science and calculations of the numerous engineers who actually have some background in this. If 60-70 PSI were needed then that's what would have been put on the door sticker that the truck and tire manufacturers are legally responsible for.
I don't think anyone said needed as in it was absolute. But rather it was expressed as an opinion.

My '07 Kenworth work truck I used to have was fitted with 275/85R22.5 tires, and those needed 100 PSI to support the 12,000 lb front axle. No reason in the world an Excursion needs 70% of that pressure to support a 4,000 lb axle.
Originally Posted by EXv10
Come on let's compare apples to apples.
Brent is right, Tom. You cannot compare those tires with the tires people put on Excursions, then draw a direct correlation to the PSI of the two tires based on axle ratings.

That's just wrong, bud.

You are wrong.

You....



are....



wrong!!!!



























Stewart
 
  #52  
Old 06-11-2014, 05:31 PM
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I tow fairly often and don't want to worry about having enough air when I hitch up. Therefore, I run 80 psig rear and 75 psig front nearly all the time. If it is icy/snowy out, I'll reduce pressures to 65 psig all around just to get a slightly bigger tire patch down.

I really don't mind this truck riding like a truck. I'm not concerned whether the air pressure is too high. I've never experienced abnormal center wear with Michelins (I just installed my 2nd set on 2005, had 3 sets on 2003).
 
  #53  
Old 06-11-2014, 10:38 PM
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I have a set of weight slips here for mine. Truck only with 3/4 fuel and me was 3440 front and 3920 rear. I did have 75 lbs or so of stuff in the back. I'm right at 5000 rear with the trailer on.
 
  #54  
Old 06-12-2014, 04:21 AM
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@Tom, the fulcrum determines the weight distribution.

A little off topic, but an Excursion is not a truck. It's an SUV that rides like a truck. Rough and uncomfortable. If you're not careful kids spill their drinks when going over bumps and potholes. Or you spill hot coffee, whiskey, jack daniel's, vodka on your lap. Waste of good booze, "UNACCEPTABLE!!"

I wonder how many F250 owners with camper-shell call their truck an Excursion. At least they can take off the camper-shell and hook up 5th wheel, haul manure, and other big items that don't fit in the Excursion(oops, truck.)
Try hauling manure in the Ex and then take your 7 wives (8 wives if you have the 9 seater) to dinner. I bet they'll divorce you and get with the F250 guy with the camper-shell. Of course they will have sit on each other's lap because the crew cab can seat only 5 and surely you don't want any of them to sit on the goose neck hitch. Or maybe you do want them to sit on the goose neck hitch. After all, you don't mind the rough ride.

Back on topic, OP just do the chalk test for optimal wear and ride comfort.
 
  #55  
Old 06-12-2014, 05:09 AM
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Originally Posted by 00X7.3PSD
@Tom, the fulcrum determines the weight distribution.
Yup, and the axles are the fulcrums.



Originally Posted by Stewart_H
That's just wrong, bud.

You are wrong.

You....



are....



wrong!!!!
I'm gonna quote Art:

Originally Posted by Krewat
I've been wrong before, and I'll be wrong again. Just wait and see.
Of course this isn't one of those times.
 
  #56  
Old 06-12-2014, 08:43 AM
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Originally Posted by 00X7.3PSD
@Tom, the fulcrum determines the weight distribution.

A little off topic, but an Excursion is not a truck. It's an SUV that rides like a truck. Rough and uncomfortable. If you're not careful kids spill their drinks when going over bumps and potholes. Or you spill hot coffee, whiskey, jack daniel's, vodka on your lap. Waste of good booze, "UNACCEPTABLE!!"

I wonder how many F250 owners with camper-shell call their truck an Excursion. At least they can take off the camper-shell and hook up 5th wheel, haul manure, and other big items that don't fit in the Excursion(oops, truck.)
Try hauling manure in the Ex and then take your 7 wives (8 wives if you have the 9 seater) to dinner. I bet they'll divorce you and get with the F250 guy with the camper-shell. Of course they will have sit on each other's lap because the crew cab can seat only 5 and surely you don't want any of them to sit on the goose neck hitch. Or maybe you do want them to sit on the goose neck hitch. After all, you don't mind the rough ride.

Back on topic, OP just do the chalk test for optimal wear and ride comfort.
No it just takes light truck tires, Ford calls it a truck, and it's basically the same as a F-250.

truck*1 (trŭk)
n.
1. Any of various heavy motor vehicles designed for carrying or pulling loads.
2. A hand truck.
3. A wheeled platform, sometimes equipped with a motor, for conveying loads in a warehouse or freight yard.
4. One of the swiveling frames of wheels under each end of a railroad car or trolley car.
5. A set of bookshelves mounted on four wheels or casters, used in libraries.
6. Nautical A small piece of wood placed at the top of a mast or flagpole, usually having holes through which halyards can be passed.
7. Chiefly British A railroad freight car without a top.
v. trucked, truck·ing, trucks
v.tr.
To transport by truck.
v.intr.
1. To carry goods by truck.
2. To drive a truck.
 
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