Class A body roll
I know this topic has been covered many times. I purchased a 2016 Fleetwood bounder 35K this year with a 22,000lbs F53 suspension. These are very tall rigs and very top heavy. I performed the cheap...
Forum Discussion
jharrell wrote:wolfe10 wrote:
Were a shock valved stiff enough to control sway, it would be WAY, WAY too stiff over bumps.
Again the FSD part of the Koni, it's supposed to be stiffs on slow movements like body roll but soften up on quick bump hits. So if the FSD valving truly does this, then it wouldn't be to stiff over bumps and still control sway.
I do agree that the first point of attack should be the sway bar since it is a proven way of doing things and very straight forward to change/adjust.
Agreed-- the Koni FSD's are less harsh over the small bumps/concrete expansion joints than comparable shocks that have the same dampening over large bumps. I am very familiar with the FSD's-- I worked directly with the engineers at Koni-NA to develop FSD's for a previous coach.
My point is that ANY shock that is valved to control sway will be WAY TOO STIFF for all other conditions. Said another way, do not expect shocks to control sway. That is the job of sway bars, with any shock, even the best only contributing a small amount.
Many shocks, including the Koni FSD's have only a small dampening force on compression (because high force here adds to effective spring rate and ride harshness) with the vast majority coming on extension (where it dampens motion, but does not add to ride harshness).
Sway bars do nothing (add no ride harshness) unless one wheel is at a different level than the other. Then they act immediately on BOTH the up and down direction (the wheel that went over the bump and the one that did not).
