| First off if you have a boost controller you should be able to set it to what PSI you want. That's the point of it. Couple rules of thumb. 13/14 = ECU Upgrade (healthy) 15 = Pushing it but known people who have 16 = Very risky (on race gas you can get away with it) Memory serves me correctly anything above 19 PSI and your turbos will be toast.
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