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Old 04-01-2012, 10:48 PM   #1
oxfordbp
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Default PCV and Breather

Why would I need a PCV valve? Cant I use a breather on the intake to do the same thing? A breather that has a hose fitting to my carb.
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Old 04-01-2012, 10:50 PM   #2
cheapstang68
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I would, I took mine of.
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Old 04-02-2012, 01:13 AM   #3
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Both do the same job the breather system is older then the pcv system tho.
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Old 04-02-2012, 01:21 AM   #4
oxfordbp
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Quote:
Originally Posted by andrewmp6 View Post
Both do the same job the breather system is older then the pcv system tho.
Cool thanks
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Old 04-02-2012, 01:27 AM   #5
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Um, no. You need a functioning PCV system to evacuate corrosive gases from the crankcase. And you can't simply plumb a hose from a breather to full manifold vacuum at the base of the carb, or you'll just have a really big vacuum leak. You need that PCV valve in between to meter the airflow down a bit. The breather goes on the opposite valve cover to vent gas into the crankcase.

On most street vehicles, there is no reason not to run a PCV. It doesn't hurt anything, and it helps extend engine life.
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Old 04-02-2012, 01:37 AM   #6
67t5ponycoupe
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PCV will also prevent a backfire from sending fire down into your crank case and causing damage. You should always run a PCV
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Old 04-02-2012, 03:24 AM   #7
oxfordbp
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10-4
I will run a Pcv valve on my new setup.

Which year should I use??
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Old 04-02-2012, 09:24 AM   #8
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Personally, I use a PCV from a common Chevy application, simply because it has a 90* fitting attached to it. I think it works on mid-80's chevy pickup 350's.
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Old 04-02-2012, 06:15 PM   #9
oxfordbp
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Quote:
Originally Posted by Starfury View Post
Personally, I use a PCV from a common Chevy application, simply because it has a 90* fitting attached to it. I think it works on mid-80's chevy pickup 350's.
I got one with a 90 in it! thanks. Do you know where it should hook up on an edelbrock 1405? Front or rear?
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Old 04-02-2012, 06:16 PM   #10
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Also does it matter what side valve cover I hook the PCV to? I would think not as long as the opposite side has a breather, right?
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Old 04-02-2012, 06:16 PM
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