[jse9]

88fivepointoh:
"ok H20 = WATER... so its liquid no mater what"

H20, as with many substances can be gas, liquid or solid. Vacuum pumps have lines between the engine and the pump. What is so aggravating about having a line come out of your manifold? Condenstion happens from something being cold enough to turn the H20 in it's gaseous form in air to liquid. It's a finite temp that does this. Note how the air is dryer in the winter. I'm done going back and forth on this.. I appreciate the devils advocate thing but this has been beaten to death....
Also, how you vent your crankcase has no bearing on manifold vacuum and will not change your manifold absolute pressure. Either you explained what I'm doign to your friends wrong, or they don't know what they're talking about. What goes on in the crankcase does not affect manifold vacuum except in extemem cases. The hole I drilled in my manifold goes directly to the crankcase, not to the plenum.


Stang_ROTY:
If you are putting manifold vacuum (from your TB) to your oil filler tube than you effectively have half of a PCV system. Doesn't the oil fill tube go to the air inlet? Then this would be considered venturi vacuum and not manifold vacuum. If it's in front of the throttle blade it's venturi vacuum, if it's behind it is manifold vacuum. The PCV system consists of 2 parts, the manifold vacuum (where the PCV valve is) and the venturi vacuum (air inlet tract, air cleaner base for carbs). When you are idling the manifold vacuum does all of the venting. When you open the throttle manifold vacuum drops so it quits venting. At this point venturi vacuum takes over (pressure drop in the inlet tract due to velocity of air moving through it). This is the same principal as to why air rapidly is drawn out of an airplane (or car) if the window is open. It sounds like you have manifold vacuum going to your oil fill tube and a breather to substitue for the venturi vacuum portion. If this is so, when you are getting into the throttle the breather is essentially the only venting source that you have. There is nothing wrong with that. It's not as effecient as the factory closed system but it works. To figure out if your source is manifold or venture put your finger on the line when the car is idling. It will not be pulling any vacuum at all if it's a venturi source. Some throttle bodies have sources so be careful.

If the line you are talking about is going to venturi vacuum (the air inlet, in front of the throttle blade) then I would get a breather with a hose end on it (like used for the Moroso Pan Evac systems) and run that to manifold vacuum. Get an inline PCV valve to put in the hose. The stock PCV system works great for keeping engines clean. It always draws a vacuum in the crankcase, wheras breathers just allow the pressure to vent. Look for moisture buildup under your valve covers (looks white). If you don't see any then you are ok. I had a system with breathers only once and I ended up going back to a stock type PCV system. Now I have only breathers but it's because I wanted all of the plumbing to be in place when I installed my vacuum pump. As far as me pulling from the intake manifold, it's more normal to pull from the valve cover but I've seen people pull from the manifold and I think it would work better personally.