no breather?
May 9, 2008, 06:22 AM
#17
No, you are wrong again.
The air comes OUT of the vent on the front right of the valve cover and goes INTO the turbo intake pipe after the MAF. It is very simple to see this - take off the rubber hose and put your finger up to the nipple sticking out the valve cover. You can feal the pulses of air blowing out.
Research:
https://www.evolutionm.net/forums/sh...d.php?t=200793
The air comes OUT of the vent on the front right of the valve cover and goes INTO the turbo intake pipe after the MAF. It is very simple to see this - take off the rubber hose and put your finger up to the nipple sticking out the valve cover. You can feal the pulses of air blowing out.
Research:
https://www.evolutionm.net/forums/sh...d.php?t=200793
From post #1:
In the stock configuration fresh filtered air enters the crank case through the vent connection and exits through the PCV valve into the intake manifold. This maintains a negative pressure in the crank case and carrys out moisture and any blowby gases thus preventing corrosion and sludge buildup in the crank case.
Originally Posted by EVOlutionary
Looks like both I and l2r99gst were right about parts of it.
I don't think we can both be right. Do you just want to agree to disagree here and stop saying that I am wrong, so someone else who finds this thread won't be confused? I like the keep facts to facts instead of misinformed opinions.
Thanks,
Eric
Last edited by l2r99gst; May 9, 2008 at 06:35 AM.
May 9, 2008, 06:41 AM
#18
From post #1:In the stock configuration fresh filtered air enters the crank case through the vent connection and exits through the PCV valve into the intake manifold. This maintains a negative pressure in the crank case and carrys out moisture and any blowby gases thus preventing corrosion and sludge buildup in the crank case.
The air flow is reversed from what you are saying. I am not wrong, but if you want to argue, then feel free to misunderstand.
The air flow is reversed from what you are saying. I am not wrong, but if you want to argue, then feel free to misunderstand.
May 9, 2008, 06:55 AM
#19
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What eric is saying is that when the breather hose is disconnected from the pre-turbo inlet tract, it is pulling in unmetered air during vacuum. When it is connected to the preturbo inlet, then it is pulling in metered air during vacuum. Just using a filter on the valve cover breather will cause a small change in fuel trims due to the unmetered air that is coming in at vacuum.
May 9, 2008, 07:13 AM
#20
Re-read my post #11 again. I even labeled the steps for this. How much more straight-forward can I be?I quoted something for EVOlutionary's link that I agree with and to show him that it is even in his link. Evolutionary was the one who thinking about the flow in the opposite direction.
mixmastermatt - thanks for having some reading comprehension. I am going nuts here.
Last edited by l2r99gst; May 9, 2008 at 07:17 AM.
May 9, 2008, 08:20 AM
#21
This is EXACTLY what I have been saying over and over. Is anyone actually reading my posts. Re-read my post #11 again. I even labeled the steps for this. How much more straight-forward can I be?
I quoted something for EVOlutionary's link that I agree with and to show him that it is even in his link. Evolutionary was the one who thinking about the flow in the opposite direction.
mixmastermatt - thanks for having some reading comprehension. I am going nuts here.
Re-read my post #11 again. I even labeled the steps for this. How much more straight-forward can I be?I quoted something for EVOlutionary's link that I agree with and to show him that it is even in his link. Evolutionary was the one who thinking about the flow in the opposite direction.
mixmastermatt - thanks for having some reading comprehension. I am going nuts here.
May 9, 2008, 02:16 PM
#23
Yeah, this happens from time to time,lol. And the way mixmastermatt summed up the point you were trying to make l2r99gst made everything make much more sense. The thread turned into a giant game of 'telephone' and each post slowly lost some info as it went along,lol.
May 9, 2008, 03:34 PM
#24
Yeah, this happens from time to time,lol. And the way mixmastermatt summed up the point you were trying to make l2r99gst made everything make much more sense. The thread turned into a giant game of 'telephone' and each post slowly lost some info as it went along,lol.
No bid deal. We are all friends.
Eric
May 9, 2008, 07:49 PM
#26
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I had similar idling issues initially with the Buschur hard intake. I drill and tapped in a barbed hose fitting and ran it back to the valve cover. After that the problem was solved.
May 9, 2008, 08:19 PM
#27
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I agree with you that the hardpipe screw with the MAF readings, but no breather hose fitted can screw with the trims much more than you think as well.
It matters how much vacuum you are pulling at idle. If you are pulling a good amount of vacuum at idle or cruise, the air enters the breather, through the valve cover, through the PCV valve, into the IM. This air this way is never counted by the MAF.
Eric
It matters how much vacuum you are pulling at idle. If you are pulling a good amount of vacuum at idle or cruise, the air enters the breather, through the valve cover, through the PCV valve, into the IM. This air this way is never counted by the MAF.
Eric
And so is this.
Right.
Under vacuum, air is sucked out of the crankcase from the PCV valve into the intake manifold and and the unburned exhaust gases are redistributed into the combustion chamber, all while drawing fresh air into the crankcase from the filtered air intake track since the vacuum in the intake manifold is far greater than the vacuum in the air intake piping.
Under boost, the PCV closes and any pressurized blow-by exhaust gases in the crankcase escape into the air intake piping which is aided by the large vacuum created by the high volume of air entering the turbo.
Under vacuum, air is sucked out of the crankcase from the PCV valve into the intake manifold and and the unburned exhaust gases are redistributed into the combustion chamber, all while drawing fresh air into the crankcase from the filtered air intake track since the vacuum in the intake manifold is far greater than the vacuum in the air intake piping.
Under boost, the PCV closes and any pressurized blow-by exhaust gases in the crankcase escape into the air intake piping which is aided by the large vacuum created by the high volume of air entering the turbo.
Fight nice children. Most of you are right but - its all getting lost in translation.
May 11, 2008, 03:16 PM
#28
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LOL How interesting it is to see different peoples comprehension. Let us all just step back and re-read the thread from the start! LOL Either way I now have a better understanding of the PCV and intake system and how they interact. Thanks guys, I have gleaned much good information from this thread to include how some of us react to criticism (sp?) Just go ahead and insult me, I'm not in anger management for nothing!
Josh
Josh
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