I think Waynne meant it the other way round, what factors affect detonation not how much boost you can run.
No-one here can tell you. Like Waynne said lots of factor affect detonation. You can be experiencing det at 1psi if something is not right.
Is it an Uno Turbo? They have a knock sensor, no? It should retard timing if it detects knock. You can listen for knock on the road or dyno with det cans although if you know what you're listening for you can often hear it without. I think you can also get some sort of display these days too which shows you when knock is occuring.