Christ this thread is repeditive.
I will state a few facts that I have witnessed with my own 2 eyes.
The skyline in discussion made 181rwkw on a hub dyno at checkered flag in wellington nz.
The turbo was RB25 series 1, stock cooler, manual bleed valve running 9psi, un-tuned safc.
Now its got also an evo3 intercooler, 450cc injectors and the safc had had a road tune. The 215rwkw is only the owners guess and not good a one id think.
Hope thats helped.