just to add my bit in here. for a series 1 r33 aswell
bought the car with full turbo back kakimoto exhaust
132.2rwkw
turbotech boost controller 10psi, apexi pod in box and hks FCD
175rwkw
front mount, fuel pressure reg, 14psi
204.5rwkw
just by someone who knows what they are doing adjusting a few things like fuel pressure and the fuel cut defender after the fmic install i gained a fair bit
but yeah dont be too hung up on figures (unless your paranoid like me and think your car is shit lol)
oh yeah and 14.7 at the drags with 175kw and suspected slipping clutch