ATS Crankcase evac/oil separating system
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Cadillac ATS Technical Discussion Forum Discussion, ATS Crankcase evac/oil separating system in Cadillac ATS Discussion Forums; Just finished the RX system for the 2.0 Turbo ATS. Here is what we found. The OEM system does NO ...
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    SC2150's Avatar
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    ATS Crankcase evac/oil separating system

    Just finished the RX system for the 2.0 Turbo ATS.

    Here is what we found.

    The OEM system does NO evacuation at idle and low RPM's, it relies on crankcase pressure to force vapors out and into the clean side (fresh) of the PCV system into the main intake air bridge/tube. It then uses for the dirty side(foul) the suction from the turbo inlet for evacuation at that time, and pulls in oil laden mist through it as well, so the OEM system is lacking to say the least.

    Here is how the RX system works:

    Can bracket mounts to the front of the engine in blank pre-drilled/tapped hole:



    Dirty side line attaches to the PCV valve (yes, they have a valve again vs the fixed orifice that caused issues):



    and it runs to the inlet side of the turbo:

    Dirty side plastic line is slit at the joint to the metal line and then with dipstick pulled and air box off, it will pivot and face the oil separator:


    Plastic crimp is cut off the end so the included hose can slide firmly over the factory hard plastic line. This will connect to the center fitting on the RX can, with no check valve:


    The metal tube will then connect to supplied line to one of the outer fittings on the RX can WITH checkvalve, arrow pointing flow away from the can:



    The clean-side runs from the air intake tube to a T where it then connects to the front and rear of the passenger side of the cam/valve cover:


    This is removed completely, and the 2 included vacuum caps are placed over each open barb on the cam cover that the T'd fresh line was connected to:



    Note the oil saturated in these lines that was being drawn directly into the intake tube and turbo:


    That takes care of the evacuation and oil separation while in boost operation, now locate the hard plastic tube that comes from the intake manifold to the evap solenoid located on top front left of the cam cover, and cut app 3" out of this line where the include T will attache. Push the includes hose up over the plastic line firmly:


    This will allow a line from the second outlet on the RX can to be attached, with inline checkvalve arrow directing flow away from the can (NOTE! Checkvalves are in the outer fittings and only flow away from the can):


    This now provides evacuation during idles and non-boost operation, separating and trapping the oil mist/vapors along with water in the winter months, keeping it out of the intake air charge. This also provides far more evacuation than the OEM system, and even pulls vacuum on the crankcase at non-boost operation more effectively removing the damaging combustion by-products from the crankcase.

    Now, the clean (fresh) side. This is one of the main pathways for oil ingestion, and we remove the clean line completely, capping the barbs as noted above, and replace the OEM oil fill cap with the RX cleanside separator. The barb on the cleanside separator them has a hose run to the barb the OEM line did attache to providing 100% MAF metered air, and trapping any oil that would be entering during full boost operation.

    System remains closed so (aside from CA as we have no CARB cert yet) it is 50 state in compliance with emission regulations, catches, separates, and traps the oil from ingestion, and removes the restrictions and provides far improved evacuation WITHOUT messing up fuel trims or the tune.

    This system is available direct: www.RevXtreme.com, by phone: 941-721-1826 for $299 plus $99 for the cleanside separator, and $15 S&H or from any of the RX dealers.

    And color plus polished or matte black (shown here). Simple install, easy fitment, and looks like it belongs there.

    ----------

    Also want to add, the cleanside separator just touches the hood insulation. We can't make it lower, but should not be an issue.
    RX Performance Products/RevXtreme.com 941-721-1826

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  3. #2
    redhead_823 is offline Cadillac Owners Member
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    Re: ATS Crankcase evac/oil separating system

    Quote Originally Posted by SC2150 View Post
    Just finished the RX system for the 2.0 Turbo ATS.
    The OEM system does NO evacuation at idle and low RPM's, it relies on crankcase pressure to force vapors out and into the clean side (fresh) of the PCV system into the main intake air bridge/tube.
    How did you prove this?
    What type of measurements are you taking?

    Did you measure crankcase pressure at high speed high load?

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    Re: ATS Crankcase evac/oil separating system

    Measured at idle, zero measurable vacuum at idle and low RPM. The rest we have done testing over the past 13 years on tons of applications and wee 6-9" vacuum at full boost from the turbo inlet.
    We have over 14,000 (probably close to 15,000) in use over the past 13 years in every type of boost application you can imagine up to 1200-1400 HP. This was an easy system to design in comparison to some. Try it yourself. Take a vacuum gauge and connect it to the dirty side line (T into it, very simple) and there is NO suction at idle and low RPM operation evacuating any of the crankcase. Surprised this was so as the CTS uses vacuum as does the V. Even the Ford ecoboost uses vacuum at idle and non boost for evacuation.

    ----------

    Measured at idle, zero measurable vacuum at idle and low RPM. The rest we have done testing over the past 13 years on tons of applications and wee 6-9" vacuum at full boost from the turbo inlet.
    We have over 14,000 (probably close to 15,000) in use over the past 13 years in every type of boost application you can imagine up to 1200-1400 HP. This was an easy system to design in comparison to some. Try it yourself. Take a vacuum gauge and connect it to the dirty side line (T into it, very simple) and there is NO suction at idle and low RPM operation evacuating any of the crankcase. Surprised this was so as the CTS uses vacuum as does the V. Even the Ford ecoboost uses vacuum at idle and non boost for evacuation.

    Take your coupler off the intake tube and see if you have any oil coating any of it.
    RX Performance Products/RevXtreme.com 941-721-1826

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    redhead_823 is offline Cadillac Owners Member
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    Re: ATS Crankcase evac/oil separating system

    Did you measure the pressure in the crankcase (i.e. at the oil cap) or in one of the lines. You can't get good measurements in any of those lines because there may be check valves present.

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    Re: ATS Crankcase evac/oil separating system

    Oil cap. The 2.0T has several integrated checkvalves, in line for the evap, in the top of the cam cover at the dirty side valve, and in one of the cleanside barbs. Measuring from the oil cap (easiest, take any old cap and drill in a 1/8NPT x 1/4" barb and a vac gauge tube will slide right on). We also saw it just wiggle the needle with pressure as we increased RPM's which surprised me. Did not expect that.
    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: ATS Crankcase evac/oil separating system

    Bumping this up. To order: www.RevXtreme.com

    or call direct: 941-721-1826
    RX Performance Products/RevXtreme.com 941-721-1826

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    lt1z350 is offline Cadillac Owners Member
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    Re: ATS Crankcase evac/oil separating system

    I am interested in anything that is going to give more power and guessing by keeping the oil out of the chamber it is cutting down on detonation? I know oil in a chamber during forced induction and even nitrous applications can cause problems. Has this been dynoed to prove results or logged to show no knock after install? My car is still stock but looking for anything proven that will start bumping it up with out getting crazy and killing the drive ability of my wife's car in turn getting me in the dog house. But the car needs to be fun for me when I drive it and used to a single turbo 383 small block so I have got to get more out of this to make it more fun.

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    Re: ATS Crankcase evac/oil separating system

    Quote Originally Posted by lt1z350 View Post
    I am interested in anything that is going to give more power and guessing by keeping the oil out of the chamber it is cutting down on detonation?
    No, it will not add more power. Keeping the intake tract clean will help prevent the loss of power from valve deposits and detonation.
    SC2150 likes this.

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    Re: ATS Crankcase evac/oil separating system

    Correct, and prevents timing pull due to detonation from the oil on FI applications.
    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: ATS Crankcase evac/oil separating system

    It is amusing to see Ford uses IM vacuum to evacuate when in non-boost mode, and nothing while in boost resulting in accumulations of water/unburnt fuel in the crankcase, and GM does evac while in boost, bit nothing while in non boost. We take both vacuum sources and ensure proper evacuation during boost and non boost operation.
    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: ATS Crankcase evac/oil separating system

    Bumping this back up for any ATS owners
    RX Performance Products/RevXtreme.com 941-721-1826

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    Bryce2.0T is offline Cadillac Owners Fanatic
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    Re: ATS Crankcase evac/oil separating system

    Question, at what level of performance upgrade would the ATS NEED this for protection?

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    Re: ATS Crankcase evac/oil separating system

    As it comes stock it has a poorley designed PCV system and is constantly ingesting oil....being Direct injection and forced induction you want no oil ingestion via the intake air charge.

    Ford uses the IM vacuum to evacuate when in non boost operation, but nothing while in boost. This allows oil to enter the intake tube during boost. GM uses turbo inlet for evacuation while in boost, but nothing while in non-boost. So what this does is use both sources (the best of GM and Ford) so you have constant evacuation during both non-boost & boost operation.

    The intake coking issues of all DI engines comes from the oil ingestion, and you want to not only eliminate that for the engine maintaining the power and economy it was designed with, but the oil causes detonation, especially with a boosted engine and that results in the ECU/PCM pulling timing, so less power and less MPG.

    This mod should be done with all of these modded or not.

    www.RevXtreme.com
    941-721-1826
    RX Performance Products/RevXtreme.com 941-721-1826

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    Re: ATS Crankcase evac/oil separating system

    Bring this back up for all with the ATS!
    RX Performance Products/RevXtreme.com 941-721-1826

  16. #15
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    Re: ATS Crankcase evac/oil separating system

    Quote Originally Posted by SC2150 View Post
    Bring this back up for all with the ATS!
    Bump for you and any specials for Forum members?

    Thanks!

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