ahh yes, efficiency...I must say this td06 feels alot more efficient than my old hiflow, though I feel my new fuel system has alot to do with this as well. But it all just works, it does the same thing all the time and doesnt run out of puff, it does it with much less effort than my old turbo too, then on gate it all just gets a little crazy, should be mental with .5 bar more boost and e85, I think thats when I will be wishing I had top mounted it ......I did play around with rolling starts, found boost coming in after 3500 but before 4000 most of the time..which is about normal for any rb25 really..
Anyway I have no idea what yours will behave like all I know is mine feels pretty damn quik already, I think maybe when my gate cracks it will be bye bye birdy ,then again you will probably have better traction with that fancy diff of yours..will be interesting..
So whenever your ready just hit me up, if I do lose I can blame my slipping clutch or my low boost