Ended up putting the car on the dyno today, made 495awkw on around 25psi, then backed it down to 470awkw at 23psi for a safety margin. Not bad for 98 octane fuel and water meth. 10 degrees of timing for the 470 and 13 for the 495.
Forgot to change the scale back to road speed, runs were started at 90kph and 2800rpm and finished up around 200kph. The little dip your see at the end is the car tagging the limiter.
Lol it was all done with a boost tee cos I was diagnosing some stuff the other day and hadn't swapped it back to the boost solenoid. The boost stays there due to the fact of the turbo being well within its efficiency range.