don't want t
don't want to hijack this thread, but your project sounds exactly like what I would do to extract serious additional power without sacrificing reliability. By all means start your own thread and post pics of your project, very interesting stuff.
I was hoping others might chime in, but anyway, the problems imo with these bolt on turbos on the Ferraris at least, is that the cars/systems are not finished in many cases and don't make the claimed HP numbers. Most don't have intercoolers, lower comp. pistons, antiknock sensors wired to a system specific programable computer, o-ringed heads or larger cooling systems for oil & water. Since these bolt-ons don't re-engineer the engine for the specific new way it's being used they managed to make these kits attractive with price. The problems come about because of this lack of re-engineering, reliability suffers(dramatically in many cases). Most Factory Turbos have specific design differences to deal with the additional stresses of Turbo Charging from their NA brothers and sisters. Look at every model Turbo (street) that Ferrari has produced 208, 288, F40 and you will find that the Factory did far more than bolt on Turbos to get the power, while still allowing the engines to live for long periods before overhauls. You can also use Porsche as a good example of Turbo & NA brothers being very different. All that said don't get me wrong, I think some Turbo mods are great. But as a builder I have to force the hard questions out into the open, and those questions all deal with Cost & Longevity issues to produce an Extreme Machine. I think what I'm trying to say is have realistic gain expectations fron TT's, and consider all the additional parts & mods that one needs for reliability when being quoted the "basic prices" from the kit sellers.