Originally Posted by Bob Miller
Considering the vey low tongue weight allowable, and the small FGRV Ellpea will be towing, IMHO, all this talk of adding air bags, changing spring rates or considering a self leveling system is, pure and simple, a lot of Hooey.
I have towed three different 13' FGRV's substantial distances, with three different vehicles, two of which had very low towing capacities, and never needed to even consider suspension modifications. It's almost like saying that putting 150 lb. sack of sand in your trunk, or two extra adults in the back seat, is going to have a drastic effect on handling. Just isn't so.
And I see that the fears of the "resonant frequency", and the results of towing with now 40+ y.o. vehicle designs, are again rearing their ugly heads.
Not quite the same since the 300 or so pounds is not in the trunk or in the rear seats, but rather is 6 inches or so behind the rear bumper.
Kind of like that generator
on the rear bumper of a trailer with the weight too far back.
The key is the g force it takes to shift the handling from understeer to oversteer. The additional stiffness in the rear helps to keep this under control.
Also the roll coupling is affected especially with the ride height lower and more if the rear end is a solid axle where the roll center is at ground level.
But this gets more complicated and it is beyond me explaining.
I used to fool around with a few race cars and back then we towed them with pickups and cars.
No matter what I try to explain will irritate someone, so I think I will just let it go.
By the way before I go the air bags don't appreciably shift any weight, but they do correct the geometry and set the caster and camber correctly on the front since the car is level. If the rear is IRS then the geometry would be improves for ti as well.
Basically if you are not towing with a nice truck and a WD hitch you are doing it wrong, Why bother with a small light
trailer in the first place if this is the case?
As Bob said with the light trailer it is most probably not an issue.
tow more and worry less. especially since the Volvo has no air bags available!