i have a modern turbo car, and even with a tiny turbo mounted directly onto the manifold, inches from the exhaust ports, and only a few feet from the throttle body, there is lag and boost loss...and thats on a vehicle MADE for boost...

plus, turbo cars can be problematic for those who dont take care of a vehicle...like people who run a turbo car hard, in the boost, then shut it down right away...before the turbo has a chance to cool...which causes heavy turbo wear.