As a rough guide, I'd be shooting for around 37 in the front, 34 in the rear. All depends on the tyre rating, etc, some like lower, some like higher pressures. Is it FWD or Quattro? If FWD, I personally think more pressure in the front (up to a point) for sharper turn in.

You've likely added a chunk of unsprung weight, meaning more effort for the power steering and more weight for the springs to work with.

Nice setup.