Closed ventilation system

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What are the advantages or disadvantages to a closed crankcase ventilation system?



-Chris
 
The PCV system draws vapors out more efficiently thatn the road draft tubes did. Over time the unberned hydrocarbons and exhaust gases including water vapor built up and diluted the oil causing sluding and acid formation. The PVC system used manifold vacuum to draw in fresh air, diluting the combustible gases in the crankcase and burning them in the engine. The system yields cleaner air and less oil contamination. It is also said to slightly improve fuel efficiency since you are burning those otherwise unburned fuel vapors.

By open, I assume you are talking about a PCV system with air pulling through the vented oil cap instead of the old road draft tubes. One advantage of the closed system that pulls air from inside the carburetor filter, is that unfiltered air is not allowed into the system. As I understand it, there are no disadvantages to running a PCV system.
 
for maximum efficiency of the PCV a gas condensator should be used...i'm not going to go on a speal on how it improves mileage...but it does....but the important part is that youre filtering out the sludge and acid from the crankcase and still allowing the fuel to enter the engine...actually the thing cracks some of the oil that goes through into fuel so u get more fuel than normal and a way cleaner engine....check out page 3 of my website...the one withe the mileage projects...i have a picture of the gas condensator with a bunch of crap that gets filtered out....just gives u an idea of what goes into your engine through the pcv....but gets filtered with the condensator...there are no real disadvantages to running a PCV system except that all the crap goes into your engine....some cars that almost pass air care inspection but not quite....can pass if that crap isnt going into the engine....which is another handy thing of the gas condensator....its pretty cheap to build....and does lots for the engine....i think that was the most worthwhile thing i have built for the engine....
 
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