the Z32 would boost a whopping 6psi. You can thank the stock wastegate solenoids (a basic boost control device) for 9psi. And if you want to go over that (without blowing shit up by disconnecting lines and overboosting), a boost controller is the only way to do that (aside from boost jets). And electronic boost controllers provide better boost response than manual controllers or jets.
Sufficient?
I love elitists who aren't really elite in any way... they amuse me greatly.