probably because they don't know **** about turbines,like meI can't believe they use a piston engine !!
intercool after the turbo. hotter turbo's spool faster! watch some dyno runs,one shows blankets installed builds peak torque/horsepower 2 secs. earlier on a long pull, which is a boat/truck application, not a race car!You don't want the turbos hot. Heat is a killer of turbos. Plus you want the incoming air charge cool. That's why there are intercoolers.
Cooler air=more dense.