startrack
Formerly type_r_lover
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I was looking at some information on the oil breather "issue".
Basically you don't want to keep it the way it is, as the oil foam that gets into your intake messes up the Octane level of the mixture you are burning.... however as it is a closed vacuum line, surely you dont wanna keep it open either.
I found that ultra long post on ephatch that tells you all about it.
http://www.ephatch.com/forum/showthread.php?t=129135
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I was wondering how many people can figure out what is wrong in this pic?
It is the valve cover breather filter.
Adding just a filter is rather a bad idea for a NA motor. You would now induce humid air into the motor as the PCV system is supposed to be sealed. The location that this filter is located at, is supposed to see a draw from the intake, applying a small vaccum to the valve cover. Thusly the addition of this filter is having the same affect as creating a vaccum leak(down thru the oil drains in the head, thru the block,the PCV valve and directly to the IM).
If you have a oil seperator/catch can between the PCV valve and IM you will find the oil in it all foamed up, with a pale chocolate color indicating moisture in the motor.
This is all from first hand experience.
I wanted to post this up as I seen two cars today with this cool looking filter installed and could see this becoming a "cool cheap mod".
And yes I had one of these cool filters installed for all of 20 minutes.
Quote:
Originally Posted by squeak04si
i dont see the big problem? i dont have anything at all on mine. my valve cover breather is just open. the purpose of it is to blow out the excess vapors built up in the head. thats why there is a radiator coolant adapted to the line to burn off the oiy vapors before it enters the intake pipe. the intake sucks the air from the valve cover. thats why sometimes you will find oil residue in the throttle body or intake. my car has never had any problems and its just left open to the atmosphere, it just constantly blows to the atmosphere
The majority of vapors go OUT thru the PCV valve, and a very little from the valve cover breather tube(only at high rpm's).
There is a vaccum applied by the intake to the VC and as the crank rotates there is a pulsing action exerted onto the air at the VC. The heated tube warms the air pulsing there to prevent condensation from forming inside the motor. The vapors, along with air drawn from the intake are drawn thru the motor, out thru the PCV valve and into the intake. If there is no resistance applied(from the intake) to the air from entering the VC then the air goes straight thru the engine block and out thru the PCV valve. Creating a vaccum leak you will not hear.
Without a even a filter there you will allow all sorts of CRAP to be drawn into the VC, add some oil and you are now wet grinding all the mechanicals in the head!!!
It is your engine to destroy, I am informing others to not make your mistake. Hook up Kpro and check what your MAP is reading without the VC connected to the intake and then check it with it installed and you will see the difference.
Proper crank case pressure is required for the rings to seal and wear properly.
I would imagine that another side affect of the filter would be some added oil "consumption" thru the PCV/IM.
Quote:
Originally Posted by squeak04si
well air is blows out my vc even at idle. my vaccuum always reads around 20-22 as it is. i have the revhard kit and it doesnt come with a spot for this to be hooked up, so where would they be expecting you to hook this up then?
I would add a catch can and plumb it in between the filter and compressor.
With a NA motor at least, having this line from the VC to the intake disconnected will cause a vaccum leak as you change the volume and speed of the air going thru the intake/motor. Almost like a stumble or a feeling of being restrained/held back.
Quote:
Originally Posted by squeak04si
could i just tee it in between the pcv and mani? or could i tee it into the brake line going into mani?
Dont do anything to the brake booster line.
It should not be connected to the PCV-IM line either. It must be connected to the intake prior to the TB and in your case with FI, also prior to the compressor.
Without having a air box installed, adding a catch can there is no problem. Summit racing has one for dirt cheap.
Quote:
Originally Posted by squeak04si
how am i gonna run into the intake before the compressor? there is no spot for it? and why would revahrd and cybernation make a kit that wouldnt have a spot for this to hook up?
I dont have an answer for you on that, perhaps they along with many others do not understand how that impacts the PCV system.
All SRI's and CAI's have a spot to hook up the tube from the VC.
Basically you don't want to keep it the way it is, as the oil foam that gets into your intake messes up the Octane level of the mixture you are burning.... however as it is a closed vacuum line, surely you dont wanna keep it open either.
I found that ultra long post on ephatch that tells you all about it.
http://www.ephatch.com/forum/showthread.php?t=129135
-------
I was wondering how many people can figure out what is wrong in this pic?
It is the valve cover breather filter.
Adding just a filter is rather a bad idea for a NA motor. You would now induce humid air into the motor as the PCV system is supposed to be sealed. The location that this filter is located at, is supposed to see a draw from the intake, applying a small vaccum to the valve cover. Thusly the addition of this filter is having the same affect as creating a vaccum leak(down thru the oil drains in the head, thru the block,the PCV valve and directly to the IM).
If you have a oil seperator/catch can between the PCV valve and IM you will find the oil in it all foamed up, with a pale chocolate color indicating moisture in the motor.
This is all from first hand experience.
I wanted to post this up as I seen two cars today with this cool looking filter installed and could see this becoming a "cool cheap mod".
And yes I had one of these cool filters installed for all of 20 minutes.
Quote:
Originally Posted by squeak04si
i dont see the big problem? i dont have anything at all on mine. my valve cover breather is just open. the purpose of it is to blow out the excess vapors built up in the head. thats why there is a radiator coolant adapted to the line to burn off the oiy vapors before it enters the intake pipe. the intake sucks the air from the valve cover. thats why sometimes you will find oil residue in the throttle body or intake. my car has never had any problems and its just left open to the atmosphere, it just constantly blows to the atmosphere
The majority of vapors go OUT thru the PCV valve, and a very little from the valve cover breather tube(only at high rpm's).
There is a vaccum applied by the intake to the VC and as the crank rotates there is a pulsing action exerted onto the air at the VC. The heated tube warms the air pulsing there to prevent condensation from forming inside the motor. The vapors, along with air drawn from the intake are drawn thru the motor, out thru the PCV valve and into the intake. If there is no resistance applied(from the intake) to the air from entering the VC then the air goes straight thru the engine block and out thru the PCV valve. Creating a vaccum leak you will not hear.
Without a even a filter there you will allow all sorts of CRAP to be drawn into the VC, add some oil and you are now wet grinding all the mechanicals in the head!!!
It is your engine to destroy, I am informing others to not make your mistake. Hook up Kpro and check what your MAP is reading without the VC connected to the intake and then check it with it installed and you will see the difference.
Proper crank case pressure is required for the rings to seal and wear properly.
I would imagine that another side affect of the filter would be some added oil "consumption" thru the PCV/IM.
Quote:
Originally Posted by squeak04si
well air is blows out my vc even at idle. my vaccuum always reads around 20-22 as it is. i have the revhard kit and it doesnt come with a spot for this to be hooked up, so where would they be expecting you to hook this up then?
I would add a catch can and plumb it in between the filter and compressor.
With a NA motor at least, having this line from the VC to the intake disconnected will cause a vaccum leak as you change the volume and speed of the air going thru the intake/motor. Almost like a stumble or a feeling of being restrained/held back.
Quote:
Originally Posted by squeak04si
could i just tee it in between the pcv and mani? or could i tee it into the brake line going into mani?
Dont do anything to the brake booster line.
It should not be connected to the PCV-IM line either. It must be connected to the intake prior to the TB and in your case with FI, also prior to the compressor.
Without having a air box installed, adding a catch can there is no problem. Summit racing has one for dirt cheap.
Quote:
Originally Posted by squeak04si
how am i gonna run into the intake before the compressor? there is no spot for it? and why would revahrd and cybernation make a kit that wouldnt have a spot for this to hook up?
I dont have an answer for you on that, perhaps they along with many others do not understand how that impacts the PCV system.
All SRI's and CAI's have a spot to hook up the tube from the VC.