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SVTPerformance's Chain of Restaurants
The Blower Bistro
Question about PCV
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<blockquote data-quote="Wicked" data-source="post: 2206053" data-attributes="member: 13991"><p>Those are good questions.</p><p></p><p>First, the check valves allow any pressure to be vented, just like anyone else running breathers. However, in my system, using the engine vacuum to evacuate the crankcase keeps the breather from being used much at all. So even though technically I use a breather in much the same way everyone else does, I am only using after long WOT jaunts and not 100% of the time. This prevents the breather from ever getting oil soaked.</p><p></p><p>The stock PCV is to ventilated the oil such that fuel and water vapor do not condense and deteriorate the oil. The vapors are sucked back into the intake but the crankcase is not actually under a vacuum due to the fresh air vent that is normally connected to the intake tube in the tb ducting.</p><p></p><p>The reason I can not use the stock PCV setup is mainly due to my MAF being in a blow thru setup. I have no metered fresh air source that isn't boosted. </p><p></p><p>Now I think this is better than the stock PCV system, especially on a boosted car, because by pulling a vacuum on the crankcase, vapors are more quickly removed. My pulling a vacuum also causes fuel and water that have condensed to evaporate at lower temperatures. </p><p></p><p>This is not for everyone but it works better than anything else I have tried.</p><p>YES it can also be used in a NA application, no difference at all.</p></blockquote><p></p>
[QUOTE="Wicked, post: 2206053, member: 13991"] Those are good questions. First, the check valves allow any pressure to be vented, just like anyone else running breathers. However, in my system, using the engine vacuum to evacuate the crankcase keeps the breather from being used much at all. So even though technically I use a breather in much the same way everyone else does, I am only using after long WOT jaunts and not 100% of the time. This prevents the breather from ever getting oil soaked. The stock PCV is to ventilated the oil such that fuel and water vapor do not condense and deteriorate the oil. The vapors are sucked back into the intake but the crankcase is not actually under a vacuum due to the fresh air vent that is normally connected to the intake tube in the tb ducting. The reason I can not use the stock PCV setup is mainly due to my MAF being in a blow thru setup. I have no metered fresh air source that isn't boosted. Now I think this is better than the stock PCV system, especially on a boosted car, because by pulling a vacuum on the crankcase, vapors are more quickly removed. My pulling a vacuum also causes fuel and water that have condensed to evaporate at lower temperatures. This is not for everyone but it works better than anything else I have tried. YES it can also be used in a NA application, no difference at all. [/QUOTE]
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SVTPerformance's Chain of Restaurants
The Blower Bistro
Question about PCV
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