Catch Can

[DAS KAMU]

im thinking of putting in a catch can

id like to return to the sump

ive done a search and it inconclusive

little help chaps

[DAS KAMU]

thought so

no one seems to have done it

well time to be macgyver

[Bliksem]

I havent done it, but will be down the track. Just weld a thread to the sump and connect it to the drain on the catch can. Fit fuel filter on the drain hose to get rid of the steel wool stuff that settles in the base of the catch can.

[DAS KAMU]

reckon you could do it with the sump on?

1 way valve needed?

where are the purchased from?

[Bliksem]

Not really because its unavoiable to stop swarf entering the sump when drilling the hole for the fitting. I doubt a one way valve is needed but if you want to fit one it shouldnt hurt. The other place you could use is the external oil returns from the head and the turbo (Although I have read on here that its not ideal)

The fittings are easy to get, I have some sitting infront of me right now. I use PSI Parts (from this forum) and www.vpw.com.au They are generally dearer than the catch can itself.

Edited February 9, 2009 by MintR33

[DAS KAMU]

good advice

i appreciate it mate

[Phobic]

i had mine tapped into my oil return off my turbo

[Abo Bob]

I have a small pump attached to a hose and fitting on the bottom of my catch can. The pump pumps the oil through a one way valve in to a T piece in the turbo oil return line. I only have the pump on when on the track.

[SECURITY]

  Phobic said:

i had mine tapped into my oil return off my turbo

that would be the best way to do it. even weld a hose onto the turbo drain pipe and T it off there. you could also get a T piece made and connect that to the rubber piece that goes from the turbo drain to the block.

[DAS KAMU]

ok cool

so the turbo oil drain wont be disturbed by doing this?

it would just be gravity that drains the catch can right?

[Bliksem]

I guess you could plumb it into the turbo drain if you use a one way valve. Heres what SK says

  Sydneykid said:

You can have a return (drain) to the sump form the catch can if you like. Don't T it into the turbo oil return as it is under a bit of pressure and the oil can run up into the catch can.

[DAS KAMU]

i though that may be an issue

[charlie25T]

I did it to mine car when i had 270rwkw

see below who did it

[SLAPS]

I personally wouldn't T' it in to the turbo's oil drain.

If you are not concerned with emissions (which I presume your not as chances are you have a larger turbo, injectors etc) hide the catch can under the exhaust manifold, shove a little filter on top and run a separate 3/4" hose to the sump.

The biggest advantage of doing this is the sump is now venting to atmo so there's considerably less pressure if any within the sump, power increases 'slightly' and oil is able to drain from the head back to the sump considerably quicker.

We all know RB's tend to throw a lot of oil in to the head, that oil then struggles to return to the sump.

Remove the sump pressure and it greatly aids oil return from the head.

I personally am a fan of 'slightly' restricting oil to the head combined with venting the sump.

Do it once do it properly.

Edited February 11, 2009 by TheRogue

[ahh 33 s2]

do u go into the exhaust side or the inlet side. from what you ^^^ have said it sounds like u done exhaust side

[charlie25T]

I did mine thru the sump

that is the best way and effective way

[den001]

im in the same boat, i have a rear of head mod to sump, and now a catch can which will be plumbed into the sump.....\

do i need to have a filter on the line form the can to the sump??? can i make it a straight line and be vented to atmo??? will it affect anything with the oil??

[PSI Parts]

Do you have an AN fitting on the sump? I would T piece there so any built up pressure would equalise through the sump opening.

Let me know if you need any fittings.

[den001]

i have a dash 10 screw fitting on the sump, 2 of them, next to each other, one for the hear return, other for catch can,

its on the turbo side so wouldnt the swing of the crank sorta suck the oil down instead of pressureise it???

whats a AN fitting???

[PSI Parts]

  den001 said:

i have a dash 10 screw fitting on the sump, 2 of them, next to each other, one for the hear return, other for catch can,

its on the turbo side so wouldnt the swing of the crank sorta suck the oil down instead of pressureise it???

whats a AN fitting???

AN is derived by the standard set by the Army Navy for fittings. They are the type of fittings you have, and are measured in dashes, i.e. dash 10 (aka. -10). Each dash is an increment of 1/16".