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Benefits of fitting a catch can?

Discussion in 'A3/S3/Sportback (8P Chassis)' started by Mikemc, Jun 30, 2013.

  1. Mikemc
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    Mikemc Active Member

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  3. wanton
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    I opened a thread recently about this very issue. Most people believe that I it better for the engine/oil and should be fitted as standard. From what I see they do stop a lot of **** going back in to the engine. Only reason people believe it is not fitted as standard is because car manufacturers probably and rightly think the general public would forget to empty the can causing them to overflow or burst in freezing conditions. With most things you get what to pay for. I would suggest buying the REVO or FORGE Catch Cans but they are lot more that £40. I am more than likely going the REVO route but that's because they are hopefully going to do me a "package deal" as I want a few bits, so I am hoping for some sort of discount.


    http://www.audi-sport.net/vb/a3-s3-...uprated-dv-oil-catch-can-really-required.html
    Last edited: Jun 30, 2013
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  4. Mikemc
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    Mikemc Active Member

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    It was your thread that refreshed my mind, have you got a link to a revo or forge catch canister?
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  5. wanton
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  6. S3Alex
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    S3Alex Rarely neutral

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    [Jun 30, 2013]
    The problem with the TFSi scavenging system is it dumps a lot of oil and water vapour into the inlet manifold,where it builds up on the inlet valve stems,as the direct injection system doesn't inject petrol into the inlet above the valves.

    A catch tank will remove a good bit of this,but not all,as there is a cam cover breather that empties into the turbo inlet.

    So....it reduces the problem,but doesn't negate it altogether.
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  7. wanton
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    As per usual Alex thank you for the proper explanation! Does a "PCV Fix" sort out the cam cover breather so it doesn't empty into the turbo inlet? Or is it just an addition for the Catch Can to work?
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