I have specs recorded/measured on all the ATS turbos, early banks. And the mods I have done to my 093ATS.
I can do a thread when time allows.
Up pipes need to hold heat, turbos are driven by heat as much as volume/velocity. I wrapped my crossover and gained 1lb of boost across the board. I have a 60-1 comp wheel so I get more air moving sooner also.

I would post pics but It says I cant for some reason.