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  #11  
Old 06-14-2017, 04:48 PM
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simplyconnected simplyconnected is offline
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You asked for more information with regards to applying the vacuum and the affects caused by it. My answers reflect their findings. Your responses flip-flop between racing engine applications where racing teams DID apply a vacuum and street engines where OEMs never apply negative crankcase pressure.

To be clear, OEMs do not suggest applying any degree of negative crankcase pressure (beyond 'slight') and neither do I. I advocate for a positive crankcase ventilation system that intakes fresh air that mixes with blowby and is subsequently sucked into the intake and re-burned. This system removes engine odors caused by blowby, it properly disposes of those gasses and it is environmentally friendly.

Early passive emissions systems simply pulled engine air into the air cleaner with no valve. I'm good with that too because it works. - Dave
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Old 06-15-2017, 04:31 PM
Yadkin Yadkin is offline
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My '72 Ford had the PCV system plugged into the air cleaner. No, the vacuum isn't strong at idle but that's not when you need it the most. A lot simpler than finding a carb spacer.


Or, tap a fitting into your existing spacer.
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