Im running about 235 bhp on a standard map and similar boost figures.
When I gun my car you can tell sound wise when the turbo comes in as the tone changes quite a bit, yours sounds a bit N/A to me especially at the end coming out of the junction. Your car to me doesnt sound to have much pull, sounds like it takes its time to get to redline. I never driven a LC let alone a stage 2 but thats what it sounds like to me compared to my turbo 1.8T engine. Maybe perfectly fine considering ive never driven a LC.
What MAF values you getting and have you log block 120 to get your power and torque figures.
Nathan