Yes, that's what I'm trying to understand. The 'turbo bible' says that some types of turbos have a housing of some sort and I assume that's meant to work with some kind of radiator (the intercooler?). Conversely, it seems to indicate that some turbos don't come with that housing and are meant to be run in applications that don't require cooling (i.e. diesel). So my concern is in buying a turbo meant for a diesel that doesn't have that cooler housing. On the other hand, from what I'm reading about meth/water injection, can I assume that that's the solution for using those turbos in a gas powered engine?
Sorry for the confusion, just trying to wrap my head around this. I'm an IT architect and I read everything before I try it, but I'm naturally a kinetic learner; which means I ultimately have to apply what I read to real-world components, and I usually don't really learn it till I get it in my hands. So while I think the words make sense, the pictures of turbos are only getting me so far and I need to ask these ignorant questions.