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Old 08-13-2006, 18:11   #1 (permalink)
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Open or closed system?

I have been running my 72 351C for about 10 years or so with oil breathers that look very similar to air cleaners. My thought was that if my system could breathe better, all would be better. Unfortunately, this causes oil mist to be sprayed in my engine compartment, thereby leaving a very light oil feel to the valve covers an any place else it may get. I'm not happen with this, so I asking if there's any recommened way to go about "closing" the system. My assumption would be to get a straight PCV from the passenger side to go directly to the port for that right below the brake intake on the carb. This, I would assume, would have to be without a "cleaner" because if I allowed a breather style with a place for a PCV, then it could/would still spray the mist like it's doing now (I'm not using any PCV at all now). My next question would be what do I do with the drivers side? Just put a cap on that side? Or should I Tee both and have two PCV's going into the same place? Help! btw - this motor isn't stock by any means!
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Old 08-13-2006, 21:54   #2 (permalink)
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Re: Open or closed system?

Quote:
Originally Posted by 72_351C
I have been running my 72 351C for about 10 years or so with oil breathers that look very similar to air cleaners. My thought was that if my system could breathe better, all would be better. Unfortunately, this causes oil mist to be sprayed in my engine compartment, thereby leaving a very light oil feel to the valve covers an any place else it may get. I'm not happen with this, so I asking if there's any recommened way to go about "closing" the system. My assumption would be to get a straight PCV from the passenger side to go directly to the port for that right below the brake intake on the carb. This, I would assume, would have to be without a "cleaner" because if I allowed a breather style with a place for a PCV, then it could/would still spray the mist like it's doing now (I'm not using any PCV at all now). My next question would be what do I do with the drivers side? Just put a cap on that side? Or should I Tee both and have two PCV's going into the same place? Help! btw - this motor isn't stock by any means!
The system I have uses a PCV on the left side with a hose to the Carby spacer/manifold(vacuum).On the right side it has a cap with an elbow in it (no pcv) and a hose connecting to the Carby Air cleaner.Basically it creates a circuit.
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Old 08-14-2006, 06:05   #3 (permalink)
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Re: Open or closed system?

i have air oil seperator inline 3/8 filters after the PCV valve.. seperates the oil and alows only air to vent back to my intake (efi) I have a reasonable amount of oil under boost.. Sealing the engine too much for me can cause gasket leak or blow out.. ford racing sells filter caps to stop the spray but they do need washing every now and then
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