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Since stock were 22psi, 28psi would be too large at WOT; the ECM would likely compensate at part throttle.
You could install an AFPR and lower fuel pressure but that might degenerate atomization.
A better setup is to have the stock injectors reconditioned at Cruzin Performance (link on my site) and install an AFPR so you can increase fuel pressure to match air flow increase mods.