Kw...
it's in kw, that dino he uses shows kw.
...Which means he's pulling (roughly) 1150 hp... 1500rpm below what his engine will take... at a lower boost than what he's allready tested the engine at.
According to a post of his in "skylines down under", at full boost the car continuously spins all four wheels on that dino so they're not sure what power is it putting out.
However he says that at full boost it's burning more fuel/air than he was hoping for when he speced the engine... and we know he speced the engine to run it against hks's 1500 hp monster...