some numbers.....(from my model)
going from atmospheric to 26psi = 56kW (191k BTU/hr) of added enthalpy to the stream at 120C (247F)...HOT!
(20C 68F ambient)
You need to bring that down to an IAT of 50C (122F) or IC off about 38kW (130k BTU/hr)
Yes - that only leaves 18kW of compression energy
Now I'm not sure where they measure their boost - but it would have to be "pre IC" 'cause though a front mounted air/air IC and piping - you get quite a bit of dP just due to the drop in temp. We see this in our SLK230's.
To achieve 26psi at 50C (122F) IAT - would be right out there.

From an SC at 65% eff. for 56kW added to the air stream = 86kW required from the crank - OUCH
BTW such boost from our cars would be equivalent to a 60mm SC pulley on an ASP 178 .....for those who choose to venture into territory no man has gone before....."Feel lucky punk"!
You'd have to be pretty sure on your SC bearing loads though.....;>)
BTW - SC pressure is a little more forgiving in that I suspect since the path between SC and MAP is so short the loss in compression due to the temperature drop through the IC would be marginal - whereas in an external air/air (2BConfirmed) the drops maybe quite significant....unknown

However - "as we say sometimes" - not to put the "Kybosh" on the adventurers out there....to pull 38kW (130kBTU/phr) out of your AIT's would be no mean feat.
We have trouble pulling 15kW (50k BTU/hr) even with a Supercooler.
But I think with post compression T's of 120C (247F) you'd get some pretty quick dissipation from your IC. "Where it goes - nobody knows"...into the condenser/radiator path?....another design issue.....

Regardless though
pulling the 56kW/eff from the exhaust stream kinetics rather than 86kW from the crank is of course where these babies (and all turbos FTM) get their advantage.

I just wanna know 2 things
1) how big the IC is and confirm if they have only air/air or include an air/water circuit. Couldnt find anything. But there would be some learnings here for us.
2) second....is there anything really insane in their piston compression design that would exclude us taking our psi up into these stratospheric diesel oriented levels.