2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

need to vent crank case pressure !!

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Old Feb 1, 2012 | 10:59 AM
  #26  
05vue-redline-06ion's Avatar
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These things don't have a pcv valve. Just a straight hose to the intake tube. Imo if you have more pcv pressure then that tube can handle then you have more issues at hand. Esp with the vaccum the intake is under under boost.

I cracked a diamond piston ringland last year and it popped the dipstick up.
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Old Feb 1, 2012 | 11:07 AM
  #27  
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yes they do have a pcv port in the intake manifold and a pcv check valve
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Old Feb 1, 2012 | 11:22 AM
  #28  
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Yes they do I wana say mine was blocked cant remember though been a while. Either way this is just something I'm gonna do on the track
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Old Feb 1, 2012 | 12:19 PM
  #29  
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set it up and let it be wont hurt a thing
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Old Feb 1, 2012 | 03:52 PM
  #30  
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In the intake manifold? Y would it be there?

Really...im asking....
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Old Feb 1, 2012 | 04:10 PM
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Originally Posted by ebristol
I have one of ^^^ but have been looking into this idea.



Moroso 97800 Check Valve
Moroso 97800 - Moroso Replacement Check Valves - Overview - SummitRacing.com

Moroso 97810 Weld in fitting.
Moroso 97810 - Moroso Replacement Weld-In Nipple Fittings - Overview - SummitRacing.com

But I want to run it in the extra O2 bung installed in my ZZP cat-d dp.

It would be the bung after the cat.



Do you think i would be able to produce enough vacuum to pull the valve cover gases out without using the weld in fitting?
I ran the EXHAUST EVAC with lack luster result

To run this properly you'll need to it vent to a dump or open header to eliminate positive pressure causing the exhaust gases to shoot back into the valve cover.

You will also have to purchase another item from jegs that adjust vacuum. Can't remember what it was called for the life of me
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Old Feb 1, 2012 | 04:20 PM
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idk why gm put it there but its there
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Old Feb 1, 2012 | 04:21 PM
  #33  
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Originally Posted by 100% METH
I ran the EXHAUST EVAC with lack luster result

To run this properly you'll need to it vent to a dump or open header to eliminate positive pressure causing the exhaust gases to shoot back into the valve cover.

You will also have to purchase another item from jegs that adjust vacuum. Can't remember what it was called for the life of me
if you have more then 1lbs of back pressure it wont work but it can on a free flowing 3in exhaust
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Old Feb 1, 2012 | 04:26 PM
  #34  
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ZZPerformance - Valve Cover Breather #ZZ-VCBRTH
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Old Feb 1, 2012 | 04:28 PM
  #35  
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Originally Posted by mrbelvedere
if you have more then 1lbs of back pressure it wont work but it can on a free flowing 3in exhaust
I had a catless free flowing 3" exhaust too

Tis why I said open header required :/ Stupid check valve cost me $50 to find out it won't work unless I run it with a dumped exhaust :/
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Old Feb 1, 2012 | 04:51 PM
  #36  
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Oh! I know what your talking about...the orfice tube.


Hm....a positive system.

Per alldata.




Crankcase Ventilation System Description
General Description

A crankcase ventilation system is used to consume crankcase vapors in the combustion process instead of venting them to atmosphere. Fresh air from the intake system is supplied to the crankcase, mixed with blow by gases and then passed through a calibrated orifice into the intake manifold.

(Pic here)

The primary control is through the positive crankcase ventilation (PCV) orifice which meters the flow at a rate depending on inlet vacuum. The PCV orifice is an integral part of the camshaft cover. If abnormal operating conditions occur, the system is designed to allow excessive amounts of blow by gases to back flow through the crankcase vent into the intake system to be consumed by normal combustion.

Results of Incorrect Operation
A plugged orifice may cause the following conditions:
Rough idle
Stalling or slow idle speed
Oil leaks
Sludge in engine

A leaking orifice may cause the following conditions:
Rough idle
Stalling
High idle speed
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Old Feb 1, 2012 | 05:21 PM
  #37  
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Originally Posted by mrbelvedere
idk why gm put it there but its there
Its in there because it was an easy and cheap way for GM to use manifold vac to pull from the crank case or head.
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Old Feb 1, 2012 | 07:12 PM
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Originally Posted by 07blackg5
if you run that in conjuction with the valve cover breather you will pull unmetered air in creating a lean condition unless you tune for it
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Old Feb 1, 2012 | 07:14 PM
  #39  
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Originally Posted by 100% METH
I had a catless free flowing 3" exhaust too

Tis why I said open header required :/ Stupid check valve cost me $50 to find out it won't work unless I run it with a dumped exhaust :/
according to moroso if you have less then 1lb of back pressure it will work you can also change the angle of the weld in tube to create more vaccum pull also
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Old Feb 1, 2012 | 07:53 PM
  #40  
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Originally Posted by mrbelvedere
if you run that in conjuction with the valve cover breather you will pull unmetered air in creating a lean condition unless you tune for it
Even if you dont run a VC breather you still have the pcv valve pulling air into the intake mani.
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Old Feb 2, 2012 | 10:06 AM
  #41  
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Originally Posted by Leafydialupking
Its in there because it was an easy and cheap way for GM to use manifold vac to pull from the crank case or head.

Makes sense to put it there...so it'll put the vented gases directly into the intake ports vs sucking them into intake tube before the throttle body caking it and the intake mani up with gunk!
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Old Feb 2, 2012 | 10:57 AM
  #42  
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Originally Posted by mrbelvedere
if you run that in conjuction with the valve cover breather you will pull unmetered air in creating a lean condition unless you tune for it
x2

It can pull air across the valve cover and into the intake with this set-up.

I made a breather with a pop-off valve in it so that it's only open when the crankcase is in positive pressure.. Kinda felt like a genius...
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Old Feb 2, 2012 | 10:59 AM
  #43  
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Originally Posted by 05vue-redline-06ion
Makes sense to put it there...so it'll put the vented gases directly into the intake ports vs sucking them into intake tube before the throttle body caking it and the intake mani up with gunk!
it can still do that you have a breather coming out of the back vlve cover
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Old Feb 2, 2012 | 11:06 AM
  #44  
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mine is just completely vented to atmosphere and i deleted the PCV valve. hasn't given me any issues and the car burns no oil, even on 25psi.
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Old Feb 2, 2012 | 11:26 AM
  #45  
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did you plug the port in the head
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Old Feb 2, 2012 | 12:19 PM
  #46  
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my hahn intake mani has a threaded pipe plug in the PCV port to block it off
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Old Feb 2, 2012 | 12:55 PM
  #47  
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i plugged the head on mine
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Old Feb 3, 2012 | 06:13 AM
  #48  
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My greddy catch can just came in yesterday....

WARNING!!!

Biggest waste of $140 shipped... cheapest i could find it btw

its a metal can with zero baffling, does not have a drain... so you need to undo one of the fittings to drain it.

WTF... PEOPLE RUN THIS ****? AND EXPECT IT TO DO SOMETHING?!

carry on
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Old Feb 3, 2012 | 07:09 AM
  #49  
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Just put a cute filter on it and be done hahaha
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Old Feb 3, 2012 | 08:36 AM
  #50  
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Moroso : Category Display


85485
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