Impossible to say without looking at your tune or datalogging. You'll be seeing about 2 more PSI of manifold pressure. If it was tuned very aggressively for your elevation and boost you may see knock retard with the increased manfold pressure. The higher the octane you run the better, just to counter the possibility of detonation.

Also you might max out your MAF (@ 471gm/sec), in which case your car could run lean and explode into a fireball and you will die.