power coming on too late means slow car, eg dyno queen.
If you did fuel injectors, airflowmeter, you could then use more boost and wake it up...
Otherwise maybe the turbo is too big?
I drove an R33 GTS-t years ago and it had high flowed turbo, front mount, injectors, tune, exhaust running 18psi, it was bloody good!!! Felt like 250-270RWKW