Ok I pick the car up from the tuners today. Unfortunately I dont have any dyno figures as his dyno isnt calibrated and he only uses it to tune.
Currently I'm running 8psi straight off wastegate as the motor is new and I need to run it in. I have some helpful info for others considering SU drawthrough.
The needle that I purchased from SU midel that the gentlemen did a "best guess" was actually a really good guess. The needle profile worked and didnt require any filing or modifying.
The needle I'm using is a BCA
here is an excellent website that visually maps the fuel profiles of needles:
http://www.mintylamb.co.uk/suneedle/I am speaking to the turner this arvo on pickup and will confirm spring, oil etc for others