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catch can internal volume? how big?

05YKO_r33

By 05YKO_r33,
in Engines & Forced Induction

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05YKO_r33

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does anyone know what is an ideal internal catch can volume?

i have designed a can i am getting made and its internal volume

is around 600ml is this enough?

should there be baffles as i am told by some?

i do not want to use stuffing as suggested by some for fear of it finding its way back to the motor. though unlikely i don't want to risk it.

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Roy Grand Master

Roy

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Who has been playing with Solid Edge (or another 3D modelling program)

If you are giving your drawing to a workshop to fab up, id be interested in hearing what price you get it done for. Aluminium is best, and its easy to work with so can do some of the prefab and fit up yourself to save coin.

If you are going to a workshop to fab, (as opposed to doing yourself), your best to stick with a circular body, this way you are reducing the amount of welding required, and/or folding, as labour costs 80%, materials only 20%

Even if you are doing it yourself, stick with cylindrical body makes life easier...

05YKO_r33 Collaborator

05YKO_r33

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  • Author
Posted
Who has been playing with Solid Edge (or another 3D modelling program)

If you are giving your drawing to a workshop to fab up, id be interested in hearing what price you get it done for. Aluminium is best, and its easy to work with so can do some of the prefab and fit up yourself to save coin.

If you are going to a workshop to fab, (as opposed to doing yourself), your best to stick with a circular body, this way you are reducing the amount of welding required, and/or folding, as labour costs 80%, materials only 20%

Even if you are doing it yourself, stick with cylindrical body makes life easier...

all my CAD work is done in microstation java including 2d drawing and 3d modelling i find this is a great program to use.

i am getting a guy i know to build it for me, i need this shape however as i have no room in the engine bay to fit a round catchcan.

Perry Apprentice

Perry

Posted
Posted
Ours is around 1 litre, plus hoses.  We use stainless steel wool inside a stocking, nothing gets back to anywhere.

I know the basic idea with the rocker cover breathers feeding into the top of the catch can, then the bottom hose running back into the sump.

But, if you didn't want to run it back into the sump, could you run a return hose into the inlet tract from the top of the can, with the can full of steel wool???

Or would that just defeat the purpose of a oil/air seperator and basically be the same as the stock setup of breather ---> inlet tract?

Cheers.

Perry

51jay Mentor

51jay

Posted
Posted
I know the basic idea with the rocker cover breathers feeding into the top of the catch can, then the bottom hose running back into the sump.

But, if you didn't want to run it back into the sump, could you run a return hose into the inlet tract from the top of the can, with the can full of steel wool???

Or would that just defeat the purpose of a oil/air seperator and basically be the same as the stock setup of breather ---> inlet tract?

Cheers.

Perry

Ahem!! basic idea is breathers feeding to bottom of can air then rises through a filter medium usually stainless steel ribbon wool and exits from the top back into the turbo inlet tube after the MAF. If you need to you can add a drain in the bottom. (some of us don't get enough oil in there to need a drain) :)

The stainless filter acts more to help condense the oil out of the air and the ribbon type panscrubbers do this better than normal steel wool

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