Desert Captain wrote:
"With most Ford based specs sheets I've looked at, to carry the full GVWR "legally", all 4 corners have to be loaded to exactly the capacity of the tires. "
I sincerely doubt that statement. I run my E-350, GVWR of 11,500# at or at least very near that max number on almost every trip. My tires are nowhere near their max load capacity which would necessitate running all 6 at 80 psi. If you do you will have the worst handling Class C ever.
Heavily loaded I run the fronts at 65 and the rears at 70-75 and that still leaves a serious fudge factor before getting anywhere near their max capacity. My FAWR is 3,800 and the Michelins are rated for 5,340# {2,670 each}. The RAWR is 7,800 and again the Michelins are rated for 10,680.
Running these pressure my rig drives and rides great. Big rigs do not push me around and wind up to 35 mph is still two finger steering. I'm sure the heavy duty Bilstein's help a lot but it would be hard for me to imagine a better handling motorbhome than mine.... this after 50,000+ miles over the last 6 years.
:C
About X2 here.
We run 75-80 lbs. pressure in the rear and 65-70 lbs. pressure in the front on our 24 foot E450 Class C.
Stock front shocks, original OEM steering stabilizer shock, and original front and rear stabilizer bars are still what's installed at around 75K miles. Koni FSD shocks are in the rear.
Front suspension caster has been corrected with tapered shims - some years ago.
Handling and road control Has been great right from the start (even without the caster correction), and is sill great after around 13 years. We can load it up anyway we want with no concerns. But ... the Koni FSD shocks in the rear did reduce the slightly harsh ride back there due to an E450 chassis under a small Class C.