Rb20 Catch Can

[CATKICKER]

Hi Guys, I know there are heaps of catch can threads but after reading pages and pages I thought I might be best just posting this to get a quick answer so people do have to go through page upon page as I wan't to sort this out today.

I only have 2 questions.

1. My catch can only has 2 connections, is there a specific inlet and outlet or are they both just holes into the can (that I what I expect...)

2. This picture of my RB20 shows how I think it should be setup from my research. (thanks again SK). Does anyone have any differences of opinion?

Thanks for your help and sorry for starting yet another thread.

Todd

[CATKICKER]

Anyone, surely someone has put this style can on an RB20 before...

Thanks in advance.

[NathR32]

Hi Todd,

I too have gotten a little confused on how to correctly install a closed, two inlet catch can onto my RB20. Have done plenty of research reading SK's and others advice and see varying setups and pictures.

However, someone posted up this picture of their engine bay, and no-one disputed the way that he had plumbed it up. Looks to be exactly the same as your diagram suggests. Can anyone confirm this setup is ok?

Hope this helps Todd,

Nath

[WazR32GTSt]

answer 1 - the inlets/outlets are the same on the catch can, just make sure you baffle it with something eg kitchen scourers in a stocking

answer 2 - the way you have it should work ok. i have it slightly differently.. see the image i attached, but with the green lines

with this way..

at idle (no positive crankcase pressure): the vapours are still going into the plenum. there shouldn't be any oil at idle anyway

on boost (positive crankcase pressure): vapours go through the catch can and catch any oil before it goes into the intake

has worked 100% fine for me and it much easier to plumb than what you have descsribed

[NathR32]

That seems to be the way that Chris32 plumbed his in as well in this thread: http://www.skylinesaustralia.com/forums/in...116809&st=0

[CATKICKER]

Thanks for your help guys!

I think I will be doing it as I described and as NathR32 posted.

I had it setup as WAZR32GTST suggested and it seemed fine for a little while then my car started blowing masses of smoke at high RPM. I removed the can after checking a lot of other things and it is now fine however I am getting a reasonable amount of oil through my atmo BOV after a flogging so I would like to connect it up properly. I am not sure if it has damaged anything to cause this excess blowby or not.

I might look at also getting a different can as the one I have at the moment is VERY cheap, has tiny inlets (I have to use reducers) and cannot be opened to baffle with S/Steel Wool.

Anything further would be great, thanks again!

Todd

[WazR32GTSt]

the way i suggested is exactly the same as shown in the pic from Nath32 just the can in a different location in the engine bay

i got mine from jsutjap its a greddy copy one. like $80 delivered and can be opened from each end and has a separate drain hole...

[CATKICKER]

Sorry, I meant Nath's first post...

[CATKICKER]

Can anyone tell me why the car would have been blowing smoke when plumbed us as per Nath's second post?

Thanks for your help!!

Todd

[woolls]

Hey Tod,

My setup is the same as WAZR32GTST. its been setup like that for 6months, but I have never had a drop of oil in the catch can, (The can is full of s/steel wool) I seem to get a bit of oil in the plenum and throttle body dont know why, maybe my pcv valve is R/S.

cheers

Leigh

[CATKICKER]

Hmmm, might have been an issue with my Catch Can (I am buying one with bigger inlets) or I could have a rooted PCV... how do you check it? pull it out and try to breath in and out through it?

[CATKICKER]

This one look ok?

Edited October 16, 2006 by CATKICKER

[burnsie]

this is a little of the topic but do u really need a catch can?

[CATKICKER]

Yep

Getting a resonable amount of blow by through my atmo BOV.

Am starting to do a bit of track work.

My engine has done around 250,000kms.

Bandaid fixing before it get too bad and I need to replace the engine.

[salad]

is it possible for a catch can with small inlet outlets to shoot the dipstick out after a lot of hard driving on the track?

i hooked mine up same as nathR32's last pic, went out to the track, came back and my dip stick was out a bit and there was oil everywhere.

i looked in the original pipe and there are restrictors in there so i didnt think it would matter with small inlet/outlets cos theyre still bigger than these.

i did disconnect the catch can and put the stock pipe back on and it ran perfectly

[CATKICKER]

mine didn't blod a dipstick but it blew a lot of smoke!

this is why I am setting it up like my original post... I will report back when I get my new can and have set it up!

i am taking it to the track on the 28th so it will be a good test then!! not that it is hard to have a good drive down here in tassie!

2 heads is a small price to pay for an easy life and good roads!!

[limpus]

this is a little of the topic but do u really need a catch can?

You don't actually need one but if you do alot of hard driving it might be a worthwhile investment...blowby that is ingested into the engine raises the likelyhood of detonation and we all know how bad that is for our engines...

[grippy]

Mine is connected the same as NathR32 and works fine. I only use my R32 on the track and it gets about half full after a 20 min session at the creek. I don't see the need to have the extra plumbing as in the previous pics.

Grippy..

[Roy]

If you are using the original hoses then remove them and check the internals. The std hoses have check valves and little filters in them. Well mine did.

I just run all new hoses and plumb it back into the inlet to the turbo as per one of the std connections. I removed the valve in my inlet manifold and leave it blanked. If i go to the track i remove the pipe to the inlet to my turbo and run it to an external vented catch can. Not optimal but my engine does not breathe a drop so works well enough.

Though if my engine breated i would run it to the PCV valve as shown rather then the inlet to the turbo...rather not get oil all thru my inlet