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Depends on the tune & boost level. The pistons aren't really designed for it, but they will cope ok as long as you dont get too power hungry on the tune.

BTW: if you are planning to boost an A series on a budget, the A14 is the engine of choice. I considered going back to A14 from A15. The A 14 can take E15ET pistons without too many mods, giving you 7.5:1 compression and plenty of valve clearance. In the A-15 the E15ET pistons come 3.5mm out of the top of the deck (A14 is only 1or 1.5mm which is easy enough to get around)

The other bonus of A14 is that if you increase the comp for NA by shaving the head, it won't cause you too many problems when you go to boost because the bowls in the E15ET piston are huge (23.5mm)