06-26-2013, 12:44 PM
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#10 (permalink)
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A True Z Fanatic
Join Date: May 2013
Location: Columbus, OH
Posts: 5,051
Drives: 2013 Silver 370z
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Quote:
Originally Posted by Sh0velMan
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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Yeah it's not an issue. My subi ran the valve covers and crank vent to a AOS that vented to atmos. No PCV and manifold blocked off where it was running. Car ran 23psi without issue. Also what I loved was the valves and crank ran into the AOS, but the bottom of the AOS Tee'd back into the crank vent line so under boost whatever came out of the valves or crank, under vacuum it would all get drained right back into the block. This is how Crawford runs their AOS too on ken blocks car. This way its 100% maintance free and during a long race you lose no oil as a OCC will fill up leaving the motor with less in it.
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13 370z-
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