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To vent or not to vent a SBC?

 
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Marv Cowden
Bel Air


Joined: 18 May 2009
Posts: 208
Location: Grand Prairie
PostPosted: Wed May 20, 2009 10:19 am    Post subject: To vent or not to vent a SBC? Reply with quote
I'm building a Vortec SBC with one piece rear main seal. Is it advisable to put a valve cover breather opposite the PCV hole or run with the vacum in the crankcase created from the PCV hose?
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wheezer
Bel Air


Joined: 14 Jun 2005
Posts: 290
Location: Canton, TX
PostPosted: Thu May 21, 2009 11:35 am    Post subject: Reply with quote
For non-racing applications the normal PCV arrangement would be the cleanest setup. Especially it's best on engines with lots of glitter as the vents are not there to put crankcase film/vapors all over everything.
Should you like the valve cover vents arrangement, it's best to have one in each valve cover.
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