Also, in case you're trying to suggest that not having a way for backpressure from blow-by to be relieved while under boost is going to cause issues... I really think that's taking it a bit too far.
It's the same conundrum you're in with a vacuum operated brake booster. Eventually you have to go back into vacuum briefly, or **** stops working. Same deal here. I'd bet you'd need to be in boost for several minutes without a single swing into vacuum for it to even become an issue.
Edit: OH lmao, and, if it got really bad, the pressure would escape the breather inlet anyway, as that isn't valved. So there you go, pressure can't really build up anyway. At least having the outlet plumbed to vacuum means you get a good purge of the crankcase every time you go into vacuum.
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