I was considering the same combination. When I spoke with John about it he advised against it as the end links would be easily overpowered by the stiffer bar. I’m interested in your experience and if it’s possible to generate enough pressure to realize the full stiffness of the bar on the street.
Disclaimer- not an engineer, just a dummy with lots of time tuning race cars-and an active imagination.
That said,
We should get a city speed idea in the morning and a highway this weekend.
Notable facts:
Truck is usually about 6500lbs, camping weight is 7000lbs at about 40f/60r weight distribution. Koni raids, 500lb rear springs and Eibach rear sway bar. Metal Cloak front disconnects, Full skids, sliders, etc bring the CG down - pizza cutters and a bit less than 300 dynamic lbs on/near the roof bring the CG way back up. The rear bar’s stiffest position is a rate of 272lbs (per Eibach), but don’t know at what amount of flex/displacement. This is apparently double the factory rate.
The Apex’s will go up to 300psi, which, not having a spring gauge or knowing the air volume, or if the stroke end is less than than the total chamber volume, makes it anyone’s guess at what point they will start compressing (stiction+initial rate) and when/if lock out/end stroke happens. The big question for me is how fast will the tiny air spring’s rate ramp-up with a little shock’s small amount of air volume, because, at some point it should become effectively rigid - either no more room, or shock spring rate greater than sway bar spring rate - and push the sway bar normally. I think (hope) it will function, on road, fully loaded as variable rate sway bar, the whole system stiffening at a non linear rate as the lean angle grows. I suspect it won’t be as good (softer) in sharp slalom maneuvers than the current setup, but equal the stock links in long highway curves. Current setup is way better than stock, great on road, but the rear bar is best disconnected off road or removed for serious stuff like Moab.
Having watched John’s YT video, the sway bar usually remains at about the same angle, meaning the whole system is only using the air springs/end links and the bar is effectively rigid (think 962), only on big hits does the air spring seem to ramp-up and then force the sway bar to flex. The shaft’s dirt line seems to indicate where that change is usually happening.
However, My real reason for getting these is exclusively for Off-road. The goal is an easy rear sway bar disconnect (mostly) but with that air spring ramp-up effect engaging the sway bar if things get way crossways out back and to flex the front axle. So if they rock off-road, I’ll keep em even if on road slides back towards stock. If not, you’ll see them in the classifieds.