We have a custom Spearco in Max'd Out, double walled and still bulged out the bottom corners, and popped the welds on the internal support rods ends where they are welded on the outside. Nathan beefed up both bottom corners with additional through rods on both Max'd Out and White Out. So far so good. I always thought it would be good info to install instant read temp gauges to read the inlet and outlet air temp to see how effective the innercoolers actually are. We have a CO2 fogger system on the outside of the innercooler in case we need it. Haven't tried it yet and won't till we are sure it won't put out some of the fire by getting sucked into the engine.
As far as air/water. Think it would work well for racing, the only ones I've seen use a tank, is there something else used when they are on a dd application? The tank method wouldn't work for very long that's for sure.