Evo x turbo manifold question

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hi sifus around,
i own a proton gen2 with 4g63 (evo4). the stock boost is around 0.6 when i just own it but my workshop push it to 1.4 bars without having any tuning.
can any sifu guide me is it safe to boost tat high as i dun wan my engine to break down as i fix it not long ago.

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