1320Fastback
Vista, Ca
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I measure the hight to the top of my bumper unloaded. Hook up trailer and after WDH is put on inflate the airbags to get the bumper back to the same measurement.
No idea if that's correct but works for me.
1992 D250 Cummins 5psd
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schlep1967
Harrisburg, PA
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I had a 2008 2500 dodge. I put Firestone air bags on it. But first I read the manual. What I figured out was I already had a 3/4 ton suspension on the truck holding the weight of the camper. I don't recall now the exact numbers but the manual said x amount of air pressure supported x amount of weight. It worked out that if I ran with about 22 lbs in the air bags it supported the additional weight and towed level. When winter came and the camper was not being used they got aired down to 5 lbs and the tires went down to 40.
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Cummins12V98
on the road
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1320Fastback wrote:I measure the hight to the top of my bumper unloaded. Hook up trailer and after WDH is put on inflate the airbags to get the bumper back to the same measurement.
No idea if that's correct but works for me.
NO, that is not correct. Unloaded you are not on your overloads and by doing what you are doing you are still off your overloads.
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Cummins12V98
on the road
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schlep1967 wrote:I had a 2008 2500 dodge. I put Firestone air bags on it. But first I read the manual. What I figured out was I already had a 3/4 ton suspension on the truck holding the weight of the camper. I don't recall now the exact numbers but the manual said x amount of air pressure supported x amount of weight. It worked out that if I ran with about 22 lbs in the air bags it supported the additional weight and towed level. When winter came and the camper was not being used they got aired down to 5 lbs and the tires went down to 40.
Sounds like you had it "Just Right".
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Grit dog
Black Diamond, WA
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Sounds like 1L243 must be out pogo sticking around in his bouncy ball truck and camper...
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Couple of Arctic Fox TCs - Sold
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wa8yxm
Davison Michigan (East of Flint)
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Use two things to set your pressure.
First A pressure guage. DO NOT EXCEED BAG RATINGS this is the only use of the guage.
Second a ruler.. Unhooked with the bags set to where you normally have them for running to the store for a loaf of bread.. Measure bumper height.. Hook up. load up and inflate to same height or recommended max pressure whichever is LOWER.
NOTE if you use a load equalizing hitch you may need to re-adjust it as you inflate.
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1L243
Oregon
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I wanted to get down to scales again I went once with truck and trailer loaded and again with just the truck loaded with what I typically carry when towing my Toy Hauler. Also keep in mind that I have a 8 foot bed with a ARE truck canopy with weight around 200 pounds. I carry about 400 pounds of cargo in the truck bed.
I have a Sherline TW scale that says my TW on the Toy Hauler alone is 1220 pounds
Weights
Truck Loaded without Toy Hauler
Front Axle 4250#
Rear Axle 3900#
Truck 8100#
Truck Loaded With Loaded Toy Hauler
Front Axle 3700#
Rear Axle 5300#
Trailer Axles 9100#
According to these numbers my TW could be more in the area of 1400lbs.
My GVWR is 8800#
The GCWR is 20000#
I may be able to grab one more link on my WDH. I have tilted the head of the hitch to keep my tow bars level but I think I can go one more washer.
Air bags have a max pressure of 100 psi.
Right now 60 psi seems to work pretty good. Ride seems firm and level.
My inquiry was to get a idea of what others run in their airbags. Understanding that everyone's setup is a little different but I would take that into consideration when looking at the numbers.
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Cummins12V98
on the road
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WHY are you unloaded your front axle when hitched with a tow behind???
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1L243
Oregon
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Cummins12V98 wrote:WHY are you unloaded your front axle when hitched with a tow behind???
Every vehicle has it's limits. Considering my OEM hitch was rated at 1000 pounds TW. And I upgraded the hitch to a 15000 1500 pound TW.
This will give a idea on how my truck carries the weight.
This is fully loaded with 35 psi in the bags. You can see there is a noticeable squat in the truck.
![[image]](https://i.imgur.com/TvVMn2w.jpg)
Unloaded
![[image]](https://i.imgur.com/dETaQHE.jpg)
60 psi will bring me up to level.
* This post was
edited 07/14/22 09:25pm by 1L243 *
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Grit dog
Black Diamond, WA
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wa8yxm wrote:Use two things to set your pressure.
First A pressure guage. DO NOT EXCEED BAG RATINGS this is the only use of the guage.
Second a ruler.. Unhooked with the bags set to where you normally have them for running to the store for a loaf of bread.. Measure bumper height.. Hook up. load up and inflate to same height or recommended max pressure whichever is LOWER.
NOTE if you use a load equalizing hitch you may need to re-adjust it as you inflate.
So you’re saying let the bags take all of the applied load? I mean, it’s not goin to kill you but your statement is basically completely bad advice.
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