not meaning to hijack this thread,
but yes, I am planning to run more than 25psi.....and yes, by that stage i may be using different fuel.
With a .48 rear, the turbo can make up to 26-28psi...but anymore will be inefficient, heat-wise.
Mick's Motorsport made 450hp (~26psi, i beleive) atw on a 4agte with a gt3076r (.48 rear) with only a basic rebuild.
Sorry again for hijack, keep up the good work SROLLA!!