Burning oil after VTTO valve cover external PCV setup. What to do?

Mvaccarelli01

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Apr 18, 2020
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Hello everyone, I recently put in a VTTO valve cover and plugged my headports and ran their catch cans. Please see the chart I attached for the pcv setup I run.. I also run their relief valve in a -10an port on the valve cover to run constant 12mb crankcase pressure “supposedly” I have 2 check valves on both high and low side. Because I heard it’s best to run a “sealed” setup

Ever since I installed everything my car is burning oil pretty aggressively I had to add a quart in only a tank of gas or 2. On the stock valve cover I never had to add any oils..

On startups I get a big puff of cloud of white smoke out of exhaust even slightly more smoke from engine bay but after idling for 30 seconds I don’t see any smoke anymore usually happens only on startups, definitely just smells a little more also running which was expected.

Is there anything different I can do with my external pcv setup to burn less oil? Not sure what I am doing wrong? Suggestions would be appreciated thank you!
 

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The Convert

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Jun 4, 2017
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Your diagram has a check valve between the low side port and the throttle body, but is it metered? I realize you have their relief valve, but I wouldn’t trust that alone. I would put an oem metering valve inline on the low side and then use the VTTO valve as backup.

My .02 anyway.
 
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Mvaccarelli01

Specialist
Apr 18, 2020
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Your diagram has a check valve between the low side port and the throttle body, but is it metered? I realize you have their relief valve, but I wouldn’t trust that alone. I would put an oem metering valve inline on the low side and then use the VTTO valve as backup.

My .02 anyway.
Can you point me to a product to try out?
 

Zeezul

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Nov 26, 2016
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There shouldn't be that much of a difference in oil consumption from an oe valve cover to an aftermarket one if your setup is correct. It might make a difference where you put the vaccuum relief valve. I have mine up front, left and both high and low side connections are towards the back of the engine where the normal high and low side are at.
 

Mvaccarelli01

Specialist
Apr 18, 2020
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There shouldn't be that much of a difference in oil consumption from an oe valve cover to an aftermarket one if your setup is correct. It might make a difference where you put the vaccuum relief valve. I have mine up front, left and both high and low side connections are towards the back of the engine where the normal high and low side are at.
Yeah that’s where I tried to put mine up front but for some reason my port is front right and it is too tall and will not fit under my hood the valve
 

schmick325

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Oct 29, 2019
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I run a VTT cover and still retain the factory flapper inline for the high side. It sits between the VC and the catch can which then connects up to the rear inlet. The low side set up is the same as yours. No issues and no codes. Low side can collects a heap of oil.
 

Mvaccarelli01

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Apr 18, 2020
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I only have a one way check valve and not a inline check valve on the highside like recommend. I think this is the problem as the one way will not allow extra pressure to escape line the inline would. I will be getting a vibrant inline check valve and updating results.
 

martymil

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The ports on the VC don't have a baffle behind them, which makes them pickup a lot of oil, hence the oil consumption.

They are sort of baffled as the ports are in line with the cam boxes which act as a baffle.

I had to empty my low side catch can every time i filled up, the only way to avoid that is to use a proper water/air/oil separator which I was
working on and it worked nicely but the level of complexity and cost of fabricating it was prohibitive and I know no one would pay that.

That setup would use no extra oil at all, never had to top it up ever.

Just put it down to the right of passage running the N54 and just empty your catch can every time you fill up and make it routine just like putting gas in your tank.
 

Heyfred

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Sep 26, 2018
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May need to run a line with a one way check valve from the breather on the catch can, to the air filter on the turbo. The valve cover has no baffling, which the stock one does and works efficiently when setup correctly.
 

Traf

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Aug 3, 2017
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Hum interesting, i'll try using that port instead of the other one, see if that makes a difference
 

Heyfred

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Sep 26, 2018
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Zoomed in on your picture and noticed you are using the port over the timing chain and running it to a catch can. Windage from the bottom end is following that path and may be pushing oil to the catch can. Move the line to one of the rear ports and then the exit side to the turbo air filter.
 

Mvaccarelli01

Specialist
Apr 18, 2020
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Zoomed in on your picture and noticed you are using the port over the timing chain and running it to a catch can. Windage from the bottom end is following that path and may be pushing oil to the catch can. Move the line to one of the rear ports and then the exit side to the turbo air filter.
I just noticed that too, if your going to run to the port over the timing chain run that to the high side and the rear one to the low side.

The vacuum on the low side will draw to much oil from the timing chain area.

Thank you everyone, I will be making changes to my setup, I am getting rid of the one way check valves, I will be running a vibrant inline check valve on the high side, and I purchased the Radium ORB PCV valve for the low side that runs out of catch can to manifold.

I can ether run both high and low from back 2 ports and plug 3rd port over timing chain.
Or do as suggested and run high side from front port and low side from back port and also run the VTT vacuum relief valve on one of the 2 back ports for added crank pressure relief. (does not fit on front port hits my hood).
 
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