If they didn't work, then I doubt AirCups would offer the BC Racing/AirCup combo on their own site, so it has to work, right?
Do you need an airtank with this setup or does it plumb straight from the compressor to the lifters?
True but my air cups allow a two inch lift. maybe i'll have to adjust the spring collars aswell about an inch to allow the damper shaft to extend the extra bit when under the action of the cup. It's hard to explain but imagine if the car weighed nothing and the coilover is on the car and sits normal. If i was to pressurise the cup i wouldnt get any lift because the damper shaft is already fully extended, so all that would happen would be that the spring will compress. So effectively i only have the amount that the car is going to compress the spring, which the car will lift by.
Hope this makes sense :/ hard to put it into words!