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Turbo 2V Catchcan

  • Thread starter Thread starter Citybuild122
  • Start date Start date Feb 19, 2022
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Citybuild122

New Member
Feb 19, 2022
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South Carolina
Feb 19, 2022
#1
  • Feb 19, 2022
  • #1
Hello, I'm sure this has been asked a lot but wanting a fresh set of answers to what I've got going on. My turbo 2v running 10-12 lbs of boost has a ton of blowby coming out of the pcv valve and the vent tube. I've got a vibrant catchcan on the way with 2 10AN hoses and 2 10AN end fittings for the catchcan. The question I can't seem to find an answer for is whether or not the 10AN hose will connect straight into the PCV Valve, or if I am removing the valve entirely and attaching another 10AN fitting to the hole the valve is in? If I have to remove the valve and attach a fitting, how would I even go about doing that in terms of actually getting the fitting in place securely?

For backstory, my tuner has already removed all hoses that connect to the valve and the vent tube and its basically just spraying all over the engine bay.

Since the vent tube doesn't really do much would I also just attach the 10AN hose directly to it as well?

Thanks for the help, this is a pretty confusing topic that doesn't really seem to have clear answers so hopefully this clears it up!
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Feb 19, 2022
#2
  • Feb 19, 2022
  • #2
Take the PCV valve out. You should be able to find a fitting to replace it. Do you have hoses from both valve covers or just one?
 
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Citybuild122

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Feb 19, 2022
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Feb 19, 2022
#3
  • Feb 19, 2022
  • #3
COramprat said:
Take the PCV valve out. You should be able to find a fitting to replace it. Do you have hoses from both valve covers or just one?
Click to expand...
THANK YOU. Could not find a definitive answer for this. I have trickflow valve covers, so the PCV valve is on the driver's side and the vent tube is on the passenger side, which seems to be opposite of what I've seen. I do not have either hoses. The shop used the hose that connects the PCV to the intake as a vacuum source for the wastegate, and the hose for the vent tube has apparently been discarded.

So I should connect the second port for the catchcan straight into the vent tube since it's a through and through valve?
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Feb 19, 2022
#4
  • Feb 19, 2022
  • #4
Mine is opposite of yours but this is how mine is set-up. I used heater hose for mine
 

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Citybuild122

New Member
Feb 19, 2022
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South Carolina
Feb 19, 2022
#5
  • Feb 19, 2022
  • #5
COramprat said:
Mine is opposite of yours but this is how mine is set-up. I used heater hose for mine
Click to expand...
Interesting. There's a few differences here. So the driver side is a vent tube? My vent tube is a straight up and down valve coming out, where as yours is a 90 degree valve like the PCV.

Also, your setup is retaining the PCV Valve, but for my boosted application I should not, correct?
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Feb 19, 2022
#6
  • Feb 19, 2022
  • #6
No PCV valve on mine. It's just a fitting. Yes, the drivers side is a vent. It used to have a valve cover filter on the driver's side. I got oil all over from that so I went with the catch can. The fitting on the driver's side is broken. I've had trouble finding a replacement.
 
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Citybuild122

New Member
Feb 19, 2022
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South Carolina
Feb 20, 2022
#7
  • Feb 20, 2022
  • #7
COramprat said:
No PCV valve on mine. It's just a fitting. Yes, the drivers side is a vent. It used to have a valve cover filter on the driver's side. I got oil all over from that so I went with the catch can. The fitting on the driver's side is broken. I've had trouble finding a replacement.
Click to expand...
Thanks so much for all this help. So the deletion of the PCV valve is what relieves the crankcase pressure under boost? I’d seen some people who just attached the catchcan and retained the valve (they weren’t boosted), what is the difference in doing that?
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Feb 20, 2022
#8
  • Feb 20, 2022
  • #8
It's a valve. It's for pollution control. Deleting it won't hurt anything. If anything, keeping it and having blowby could just cause it to clog up.

My car isn't boosted either but it has big cams so my compression ratio is high. I'm thinking anyone who kept it with a catchcan didn't have a fitting that would replace it. I'm not sure of any benefit to keeping it.
 
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Citybuild122

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Feb 19, 2022
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South Carolina
Feb 20, 2022
#9
  • Feb 20, 2022
  • #9
COramprat said:
It's a valve. It's for pollution control. Deleting it won't hurt anything. If anything, keeping it and having blowby could just cause it to clog up.

My car isn't boosted either but it has big cams so my compression ratio is high. I'm thinking anyone who kept it with a catchcan didn't have a fitting that would replace it. I'm not sure of any benefit to keeping it.
Click to expand...
Thanks for the help. One last thing, I went out and took both valves off the car just to get a clear picture. The first one is from the passenger side, what I believe to be the vent tube. Straight up and down. The second and third pictures are of the 90 degree valve that I thought to be PCV, but there is nothing on the inside, it looks just like a regular valve. I’m going to call the shop on Monday to find out, but it looks like pcv might’ve already been deleted entirely and I just need to plug the catchcan into these valves.
 

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COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Feb 20, 2022
#10
  • Feb 20, 2022
  • #10
Yep. Good to go. Just flow through fittings. My catchcan catches a lot of stuff
 
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Citybuild122

New Member
Feb 19, 2022
8
0
1
South Carolina
Feb 20, 2022
#11
  • Feb 20, 2022
  • #11
COramprat said:
Yep. Good to go. Just flow through fittings. My catchcan catches a lot of stuff
Click to expand...
Thanks so much, I can't even tell you how much this has helped me out. So if I don't have a PCV valve and I'm still getting that crankcase pressure, do you think there's something wrong with the car?
 

COramprat

...I can take it. I think.
20+ Year Stangneter
Mar 2, 2003
8,474
1,463
223
Sea of Tranquility
Feb 20, 2022
#12
  • Feb 20, 2022
  • #12
What makes you think the crankcase pressure is too much? The blowby? That's normal.
 
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