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for anyone that has crankcase pressure issues

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Old Jun 19, 2015 | 02:28 PM
  #1066  
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From: Houston
Originally Posted by mrfred
I found that the OEM Evo PCV is great, but the NAPA etc PCVs leak badly.

Dallas, presumably you mean that line with the Boomba check valve can VTA or go to the intake pipe, correct?
Thanks mrfred, I do not know which one is on my car at the moment.
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Old Jun 20, 2015 | 07:20 AM
  #1067  
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Originally Posted by Dallas J
I talked with MrFred a bit about my setup and this is what I've come up with as a start. Since the factory setup under boost only has the one vent (PCV close) which is tiny, I think opening up the 2nd port with a -10 will by itself be a massive improvement.

I don't really want to VTA though I might temporarily till I get another port on the intake pipe. This way will let me keep PCV function, and vent through a -10 port to either VTA or Intake. Crankcase vent side will just have the standard STM -6 port added and ran like factory to intake pipe.

All the parts are on order, just gotta play the waiting game.

That's a replica of my intake side as well, with the addition of a vent from the oil pan on the vacuum side.
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Old Jun 22, 2015 | 01:29 PM
  #1068  
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From: Vzla
Originally Posted by kaj
if you are blowing smoke or popping your dipstick you will want to vent. i was going to do it just in case... but PD in my area would send me to the smog ref. i'm hoping i don't need it.
I'm blowing some smoke.

The dipstick is ok.

I have read so many post, and so many different answers, I'm not sure what to do :S
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Old Jun 22, 2015 | 01:56 PM
  #1069  
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Originally Posted by audiofan
I'm blowing some smoke.

The dipstick is ok.

I have read so many post, and so many different answers, I'm not sure what to do :S
I had 2.7 psi of crankcase pressure but the dipstick was not popping out. I believe that FP says they want less than 0.25 psi crankcase pressure.

If you pull off the intake pipe and find oil, then better ventilation is definitely needed. If no oil, then I think the smoke from the exhaust is being caused by something else.
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Old Jun 22, 2015 | 02:03 PM
  #1070  
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Originally Posted by audiofan
I'm blowing some smoke.

The dipstick is ok.

I have read so many post, and so many different answers, I'm not sure what to do :S
smoke under acceleration, deceleration, or cruising?
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Old Jun 23, 2015 | 02:14 PM
  #1071  
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From: Vzla
Originally Posted by kaj
smoke under acceleration, deceleration, or cruising?
Acceleration and cruising a little
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Old Jun 23, 2015 | 04:49 PM
  #1072  
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Originally Posted by audiofan
Acceleration and cruising a little
Aah. Smoke while cruising may indicate a different problem?
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Old Jun 23, 2015 | 05:22 PM
  #1073  
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That sounds like a ring sealing issue. I would do a comp and leak down test..
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Old Jun 24, 2015 | 07:01 PM
  #1074  
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From: Vzla
Originally Posted by kaj
Aah. Smoke while cruising may indicate a different problem?
I'm not sure of it smokes when crusing, a friend told me once, but I haven't seen it in reaerview mirror

On WOT I saw ir once in the mirror

I will pull the intake and check for oil, and then see what needs to be done.

If it is crank case pressure, can it damage the turbo?

Thanks
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Old Jun 24, 2015 | 11:34 PM
  #1075  
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Shouldn't damage the turbo, but will make a mess of your intake piping and intercooler.
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Old Jun 25, 2015 | 09:45 AM
  #1076  
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Originally Posted by audiofan
I'm not sure of it smokes when crusing, a friend told me once, but I haven't seen it in reaerview mirror

On WOT I saw ir once in the mirror

I will pull the intake and check for oil, and then see what needs to be done.

If it is crank case pressure, can it damage the turbo?

Thanks


It won't damage the seals, they're designed to relieve the excess pressure. Is what can happen is the leaking oil can coke up behind the turbine heat shield and can eventually cause the heat shield to rub on the turbine.
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Old Jun 26, 2015 | 01:44 PM
  #1077  
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I like this concept as it might not require mods to the valve cover, but still gets you a flow improvement.

Are you doing anything about a catch on the Valve Cover side?
Mind posting a BOM?


Originally Posted by Dallas J
I talked with MrFred a bit about my setup and this is what I've come up with as a start. Since the factory setup under boost only has the one vent (PCV close) which is tiny, I think opening up the 2nd port with a -10 will by itself be a massive improvement.

I don't really want to VTA though I might temporarily till I get another port on the intake pipe. This way will let me keep PCV function, and vent through a -10 port to either VTA or Intake. Crankcase vent side will just have the standard STM -6 port added and ran like factory to intake pipe.

All the parts are on order, just gotta play the waiting game.

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Old Jun 26, 2015 | 02:07 PM
  #1078  
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Originally Posted by Nimpoc
I like this concept as it might not require mods to the valve cover, but still gets you a flow improvement.

Are you doing anything about a catch on the Valve Cover side?
Mind posting a BOM?
Based on my pressure measurements, this should get the pressure in the valve cover down to around 0.25 psi which should relieve any issues for most people. The only drawback I've heard to using the PCV vent on the VC is that I was told by English Racing that under hard acceleration, that vent can get flooded with oil. I have yet to see it on my Evo, but I'm using a Kiggly HLA.
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Old Jun 29, 2015 | 12:56 PM
  #1079  
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how are you measuring pressure in the engine?

finally installed -10an on PCV side (removed stock PCV) and VTA.
drilled/tapped -10an port on driverside, added a port to intake tube, connected.

no more dipstick blow outs, car seems to be noticeable smoother rpm without boost. and my vacuum now sits at -10 to -12 hg/in versus the -8 to -10 hg/in before capping the stock PCV.

anyone have trouble with the STM -10AN Push fitting coming out though? should i put loctite or RTV on it?

is it possible this could be effecting my tune though? seems to be rich and stutter in certain RPM now mostly mid-range goes straight 10.00afr
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Old Jun 29, 2015 | 01:43 PM
  #1080  
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Originally Posted by Nimpoc
I like this concept as it might not require mods to the valve cover, but still gets you a flow improvement.
A -10 fits in the OEM PCV location? I've never tried.
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