Not wanting to get a black eye for hyjacking your post, but it seems to me you guys could do yourself some service by posting some dyno numbers of the various turbo (installations) you're talking about.....
Short of that, you could venture over to your local drag strip (road courses have too many variables) and look at the ET #s before and after said turbo changes?
That way you're not talking without facts and figures to back up your changes(?)
Just a thought.....
regards---rhjames
Nothing like chasing down a late model Vette with a 27 year old 928!!!