Bupe Bupe and blocking other opiates

Is there an amount at which bupe blocks other opiates 100%? For example, does 2mg block all other opiates no matter how much you take? Does 4mg? Or does it not work that way?

Can any amount of a full agonist opiate bypass the blocking effect of bupe? Disregard overdosing, I just mean theoretically. Like if someone takes 8mg bupe, can a certain amount of heroin override that.

you could in theory always push through the bupe. this is also very dangerous and not to mention expensive.