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Resolved Oil catch can question

Posted by 914 Cheeko, Nov 7, 2018

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  1. 914 Cheeko

    914 Cheeko Probationary Member

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    So I have my Evo 0 I am still working on and I have a breather catch can (wrong type for this car) that was included by the previous owner. I'm a poor teenager that doesn't want to spend $15-30 on a branded/ebay catch can and I don't know how to do any type of fabrication, I know oil catch cans are easy to fab. I was wondering if I could simply take off the air filter from the top of the catch can and hose clamp something over the hole to make it a sealed catch can, like a piece of rubber tubing and obviously tighten the hose clamp a lot so it doesn't get sucked in. It has two hose ports which is what I need, it's just that I don't need the breather. would this cause any air flow problems, or affect the way the oil gets caught in the inner filters?
     

    Street Build 193  1

    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  2. jinscho

    jinscho Proven Member

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    You could definitely cap it off. Measure the opening and hit up your local hardware store, tell them you need to cap off a pipe and they should be able to point you in the right direction.
     

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  3. Vegas smith

    Vegas smith Proven Member

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    Or you could reroute it back to the turbo intake pipe.
     

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    1993 Eagle Talon TSi AWD
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  4. 914 Cheeko

    914 Cheeko Probationary Member

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    Newtown, Connecticut
    Wouldn't that reduce the flow since the catch can breather port is bigger than the intake pipe port? The tubing would get smaller in diameter, restricting the flow.
     

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    1991 Mitsubishi Galant VR-4
    awd · manual · Galant VR-4
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  5. Vegas smith

    Vegas smith Proven Member

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    Houston, Texas
    I can't tell what setup you have but the intake pipe would draw air from the catch can and wouldn't hurt any flow to the turbo. This is roughly how the stock setup works. You could always install a port/nipple the same size as the catch can breather port.
     

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    1993 Eagle Talon TSi AWD
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  6. rEclipserGST

    rEclipserGST Proven Member

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    Search "the pcv system dsmtuners" on google.
     

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    1995 Eagle Talon TSi AWD
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  7. tametalon92

    tametalon92 Supporting VIP

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    All I can say is get some check valves so you're not pressurizing the can if it's going between the pcv valve and your intake manifold, my last rendition I didn't have the check valves and it puked the oil out of every seam no matter what I used to seal them (My cans are bolted together).

    As @rEclipserGST said Google his tag line and you'll come across a thread by @Calan. Very comprehensive and explains things well.
     

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    rEclipserGST likes this.

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