A good article on turbos is in the December 03 Hot Rod followed by intercoolers in January 04. A few tech explanations and graphs but mostly in layman language. Already mentioned is to keep as much heat in the turbine housing as possible and keep the air from the compressor to engine as cool as you can. Also highly stressed is to keep the whole system as compact as possible to cut turbo lag. Something from way in the back of the truck would surely have tremendous lag. Along with the engine management required is the process of getting the right turbine/compressor combo for a specific engine and the best turbine and compressor wheel design. You just don't get one size fits all right out of the box for even the most popular engines, it does take several tries to get right. If you have 15 pounds boost, the max for a street engine, intercooler, engine purpose built for turbo, and all the correct management then your 327 will dyno out close to the same readings of a normally aspirated engine twice that big. Buddy Ingersol was banned by NHRA from running his turbo Buick V6 (with intercooler in liquid nitrogen) from Pro Stock because the 500ci aluminum headed, dominator carbed big blocks didn't have a chance against him.
