12-29-2012, 09:27 AM
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CC Member
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Join Date: Sep 2006
Location: No city...only 118 residents in Manter,
KS
Cobra Make, Engine: Cobra Auto Works body, Ron Godell Racecars chassis, 1989 Mustang GT 5.0 HO (converted to carb), W/C T-5, 3.73's in a Ford 9" Traction-Loc.
Posts: 812
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Quote:
Originally Posted by patrickt
I see you have a PCV running to the back plate of the intake manifold from your brake booster port on the carb; that's good. But I see that on the driver's side valve cover you have a cap that does not allow breathing. Is your breather over on the passenger side valve cover? (Which I can not see). You have to have some place for the air to be drawn in.
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Patrick, help me out here. It was always my understanding that the PCV (Positive Crankcase Ventilation) valve was designed to vent pressure from inside the engine that was a result of combustion gasses bypassing the rings, a common and unavoidable process. I was unaware that any form of fresh air intake was necessary...in fact, as I understand it, the PVC system requires pressure in the crankcase and a vent could prohibit pressure from building.
Please set me straight on the function of the PVC valve/system....
Thanks!
Cheers!
Dugly 
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