Here are a few phots as well as a few dyno pulls with our single 76mm turbo kit. It holding at about 7psi and we will be doing a 6 pound and 9.5 pound tune with our kits.
why such a large turbo? what are you seeing full boost at? I know these flow alot more then your average Ls1 but I'd think a nice 66 would be better suited for a street car??
I wouldn't say that's a large turbo for an ls3 at all especially considering the compression and impressive flow of the stock heads. plus on top of that the particular turbo used and the way its setup will spool it quicker yet.