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PCV/Catch Can/Crank Pressure

This is a discussion on PCV/Catch Can/Crank Pressure within the GTO forums, part of the Vehicle Specific category; Originally Posted by 6.0LiterImportEater Manifold vacuum is an effect of choked flow through a throttle in the intake manifold of ...

  1. #81
    King 0f n00bz shady milkman's Avatar
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    Quote Originally Posted by 6.0LiterImportEater View Post

    Manifold vacuum is an effect of choked flow through a throttle in the intake manifold of an engine. It is a measure of the amount of restriction of airflow through the engine, and hence of the unused power capacity in the engine.
    at wot there is very little vacuum..so all that unused power capacity is used at wot

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    nice Wikipedia copy and past too

  3. #83
    Member 6.0LiterImportEater's Avatar
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    Quote Originally Posted by shady milkman View Post
    nice Wikipedia copy and past too
    Wikipedia is great isn't it haha!

    Sorry I used to be a Automotive Engineer with Delphi but due to our recession am now in the Nuclear Power Industry. I understand mechanics like the back of my hand but do a job explaining it in laymen sense so I use Wiki. Works for me haha!

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    Quote Originally Posted by 6.0LiterImportEater View Post
    Wikipedia is great isn't it haha!

    Sorry I used to be a Automotive Engineer with Delphi but due to our recession am now in the Nuclear Power Industry. I understand mechanics like the back of my hand but do a job explaining it in laymen sense so I use Wiki. Works for me haha!

  5. #85
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    You guys are vacuuming out my head!


    on another note, if I do not burn oil, what benefit will there be of me adding a catch can. I use almost no oil over a 4,000 mi OCI on the LS1 so I am thinking that it would not be of much benefit to me. Is my thinking right?

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    Quote Originally Posted by VTXrider View Post
    You guys are vacuuming out my head!


    on another note, if I do not burn oil, what benefit will there be of me adding a catch can. I use almost no oil over a 4,000 mi OCI on the LS1 so I am thinking that it would not be of much benefit to me. Is my thinking right?
    if your intake is clean then the need for a catch can is diminished..but if you have some spare cash you might as well pick one up..its all about insurance

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    Member fxgs's Avatar
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    If you have the entire PCV system deleted and have the double breather set-up, why run a catch can at all?

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    Quote Originally Posted by fxgs View Post
    If you have the entire PCV system deleted and have the double breather set-up, why run a catch can at all?
    because with a pcv system with a good catch can a breather is not necessary

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    Problem is the GM engineers haven't built a good/proper PCV system.

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    Quote Originally Posted by fxgs View Post
    If you have the entire PCV system deleted and have the double breather set-up, why run a catch can at all?
    You're right. Back before pcv systems were even invented thats all we ever did on the old Gen 1 small blocks, it's the way they came, a simple breather on the intake that doubled as your oil fill, and a dump tube at the rear of the block. There weren't even provision in the valve covers at that time. Simple and it worked.

    Guess the problem came when the tree huggers decided that wasn't environmentally friendly.

    With that being said I guess on these newer cars that have to be tested in certain areas it becomes a question of whether you want to pass inspection or not. The simple breather solution probably won't fly.

  11. #91
    I flame retards CamaroFan71's Avatar
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    Quote Originally Posted by Sarge View Post
    Good to hear....yes folks....delete your PVC...vent your crank....run PP 10-30 and yes....you are making more power and wont leak/burn oil. Just a simple fact of life.
    Is this a good mod for a stock GTO as well? I just paid for and will be picking up an Silver 05 Goat on tuesday. And whats the average cost for this setup?

  12. #92
    Member Texas Jack's Avatar
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    Did mine even though it didn't burn any oil, knock on wood! Bought a billet model, but you can do one for 20 to 30 bucks and it will do the job, I can tell you after a hard day you will drain oil out of the can. Mine has a breather on each valve cover and have had no problems, good stuff.

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    Quote Originally Posted by CamaroFan71 View Post
    Is this a good mod for a stock GTO as well? I just paid for and will be picking up an Silver 05 Goat on tuesday. And whats the average cost for this setup?
    Yes. As stated right above me.....you can do it for less than buying aftermarket parts. But it will run anywhere from $150 bucks for a manufactured catch can and a store bought breather and plugs to a home Depot setup/breathers and plugs for under $100 bucks.

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    Quote Originally Posted by Sarge View Post
    Problem is the GM engineers haven't built a good/proper PCV system.
    Sarge, correct me if I'm wrong, but you have the PCV system deleted but you still run a catch can?

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    Quote Originally Posted by fxgs View Post
    Sarge, correct me if I'm wrong, but you have the PCV system deleted but you still run a catch can?
    Of course.....I do not want any oil in my intake. At WOT you are pushing oil like a big dog

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    Quote Originally Posted by Sarge View Post
    Of course.....I do not want any oil in my intake. At WOT you are pushing oil like a big dog
    am i a big dog sarge ?

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    Grand Imperial Wizard Sarge's Avatar
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    Sure

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    Quote Originally Posted by Sarge View Post
    Sure
    aww your ok for a grumpy old texan

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    I have the truck pcv valve and redid 100 percent of my system.... popped the TB off while I had the pump out. Im really thinking of buying a nice nice catch can. No oil puddled up but dam its greasy feeling. Ill spring for the new catch can when i go ls6.

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    In the process of doing this now!

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