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PCV theory and selection.

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Old Aug 31, 2005 | 01:38 PM
  #1  
Cruz'N Bruz'R's Avatar
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Joined: Sep 2001
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From: Cincinnati, OH
Car: 87 Iroc Z
Engine: 383ci.
Transmission: WC-T5
PCV theory and selection.

I'm experiencing some high crankcase pressures. The bottom end has less than 100miles on it after a fresh rebuilt. the rings were reused because they didn't even have 1000miles on them and looked to be fine.
I get no smoke out the rear and it is running really clean. But the pressure leaks oil out the breathers and blows the intake seal at the back.

Would it be better to run a PCV and a breather, or does 2 breathers allow even more ventilation?

If I need a PCV, then which type flows the more air?
I'm running a 383ci carb setup, so i have a good vacuum reference, but will the stock TPI PCV flow enough air to serve the purpose?
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Old Aug 31, 2005 | 01:44 PM
  #2  
Apeiron's Avatar
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Joined: Jan 2000
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From: Mercedes Norte, Heredia, Costa Rica
Car: 1984 Z28 Hardtop
Engine: 383 Carb
Transmission: 4L60
Axle/Gears: 3.54 Dana 44
A completely stock PCV system should be fine.
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Old Sep 1, 2005 | 03:44 PM
  #3  
ME Leigh's Avatar
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Joined: Jan 2002
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From: Valley of the Sun
Car: 82 Z28
Engine: Al LT1 headed LG4 305
Transmission: TH350
Axle/Gears: 3.73 posi with spacer
Any PCV with a breather will work fine.
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