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Spitballing some ideas for my catch can fabrication, input would be appreciated

Discussion in 'A3/S3 Forum (8L Chassis)' started by Lavis89, Sep 4, 2013.

  1. Lavis89
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    Lavis89 Active Member Regional Rep

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    [Sep 4, 2013]
    The idea for the moment is basically to make a similar version to some of the more common ones on the market, i can easily fabricate up a stainless steel box or can and tig weld it up, all im stuck with really is the drain, the idea i have at the moment would be to weld a 16mm stainless nut on to the bottom of the box, then stick a small bolt through it with a o seal, would just mean i'ld have to remove it from the car to empty it every time. also the baffling, how long does the wire wool last? i should imagine i'll be able to poke some up through the drain (can make it a 24mm if worst comes to worst). I'll work out the positioning for the can after i have everything else sorted then make myself a little bracket to bolt around the firewall somewhere (similar to the post in the stickies, some people do read them :p) One last thing, what kind of volume should i be making it? i have 0 experience with these things so no idea how quick they fill up

    Also when i have finished making it i'll post all the drawings up here and some step by step photos.
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  3. Scullies
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    Scullies Well-Known Member

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    [Sep 4, 2013]
    For the drainage, I have a pipe connected to the catch can drain that runs to the bottom of the car. It's has a small tap on it, so all I need to do is put something under the car to catch the oil when I open the tap.
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  4. Lavis89
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    Lavis89 Active Member Regional Rep

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    [Sep 4, 2013]
    And that is exactly the reason i posted in here. definitely stealing that idea! cheers! can easily braze a cheap brass hose barb onto the bottom :D
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  5. S321BAM
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    S321BAM I lost the rod lottery

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    [Sep 4, 2013]
    I fabricated my own from ali. Used a quick release oil drain plug for drainage and woven stainless mesh to baffle as I didn't want it to melt from welding. I'll try and post s pic tomorrow
    #4
  6. slowcoach3
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    slowcoach3 Active Member

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    [Sep 4, 2013]
    Or just vent to atmosphere...
    #5
  7. Lavis89
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    Lavis89 Active Member Regional Rep

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    [Sep 4, 2013]
    It will be VTA if it is a VTA catchcan can i do away with the baffling? Like i said, im a newbie with this kind of stuff, just trying to simplify my engine bay as much as possible at the moment before i look at taking a trip up to visit the badger so there is less stuff to go wrong!
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  8. LynxE
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    LynxE Member

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    [Sep 5, 2013]
    I've heard the term but could one of you clue me up and what a

    catch can is

    what it does

    do stock S3 (or indeed all A3's) have one?

    If not do I need one?
    #7
  9. S321BAM
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    S321BAM I lost the rod lottery

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    [Sep 5, 2013]
    FAQ's in the stickys dude, all you need to know is there about catch cans
    #8
  10. LynxE
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    LynxE Member

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    [Sep 5, 2013]
    Yeah I've seen the "how to" before and I'm not being funny but that really doesn't tell a novice like me what one is and what it does. It includes a diagram but I'm not sure what of and I don't even know what the PCV is etc

    Rather than googling for all the info I thought I'd ask you folks. Might give me an idea then whether I think I need one and then I'd be looking to the "how to" more
    #9
  11. S321BAM
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    S321BAM I lost the rod lottery

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    [Sep 5, 2013]
    Beginning of the how to explains the theory behind them, before going into how to.....
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  12. Lavis89
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    Lavis89 Active Member Regional Rep

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    [Sep 5, 2013]
    basically check out the threat in the stickies, there is a picture of a pipe with loads of gunk coming out of it, that stuff is in your car, does it look good for it? nope! catch can will sort that problem out.
    #11
  13. audiholic ste
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    audiholic ste Member

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    [Sep 5, 2013]
    I've been thinking of knocking one up . Going to use 80 mm stainless tube weld a disk in the bottom and thread the top . With screw on top .
    #12
  14. Lavis89
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    Lavis89 Active Member Regional Rep

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    [Sep 5, 2013]
    that was my original idea, until i realized the only stainless tube we have in work is 5mm wall thickness, will be a bit too much of a unit! rolling one from sheet will work in the same way though, just a bit more effort!
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  15. audiholic ste
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    audiholic ste Member

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    [Sep 6, 2013]
    Shame your not near me I would have cut u a length . Keep us informed and do some drawings of your ideas ..
    #14

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