A smaller turbine is used as there are spooling issues with that amount of piping. The length actually DOES cool the intake charge SOME but after a certain level (anywhere from 5-9 psi depending on app.) intercooling or water injection is necessary. Of course adding an intercooler reduces boost pressure even more so goals and a properly sized turbo have to be well planned out.

IMO very cool mod that can be done on the cheap (random turbo, piping, elbows) but I would not go for big gains with it. It only stays a budget at the lower boost levels. By the time you are running serious power you are looking at real turbo setup money.