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Catch Cans - Again

maccattack

By maccattack,
in Engines & Forced Induction

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yogi000 Mentor

yogi000

Posted
Posted

Hey everyone,

if you have a catch can with only two outlets on it where do you juction into the breathing system on an rb20???

i'm looking at something like this on ebay, seems as good as the rest?

http://cgi.ebay.com.au/ws/eBayISAPI.dll?Vi...4550437345&rd=1

Thanks

George

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Sydneykid Grand Master

Sydneykid

Posted
Posted
Hey everyone,

if you have a catch can with only two outlets on it where do you juction into the breathing system on an rb20???

Thanks

George

Hi George, you can, you just join up the 2 outlets from the cam covers with T piece and use the other can outlet to join into the breather system. It isn't as neat as buying one with the right number of outlets.:stupid:

BezerkR32 Veteran

BezerkR32

Posted
Posted
Hi All,

I have searched and read numerous threads regards oil catch cans and am looking for a bit of direction. Most seem to acknowledge that the standard (cheapie) catch cans are nothing more than a can (no internals) and need to be stuffed with a filter (steel wool / scourers etc) in order to actually do what they are supposed to do - seperate oil from air and catch the oil. There are a couple of catch cans (more expensive- such as the Essential and ARC cans) which replace the washer bottle (GTR's only I think) and apparently do all they are supposed to do. These cost around $400-$500, which isn't exactly cheap. I have also seen the air/oil seperators (cylinder type) which fit across the top of the engine (GTR). From what I've been told, you also need a catch can with these to collect the oil. This type of air/oil seprator and cheap catch can would work out to be much cheaper than the expensive unit "which does it all". Question are-

Is this setup better or worse than the expensive catch cans?  

Do the expensive ones do everything they claim to?

Apart from reducing octane rating and performance, does oil blow back damage anything?

Thanks for your help.

Hi, we make custom surge tanks & breather cans. Can must be baffled so oil runs down to bottom of can & not straight out filter. if you email me at [email protected] i will send you some photos.

  • 2 months later...
wilch Grand Master

wilch

Posted
Posted

I bought one of these from Unique Autosports on the weekend. I was going to buy the GReddy one (big and empty..), but John recommended this:

gtstcatchtank.jpg

It is baffled, and has a big hole up the middle of it (you can see it in the pic), there's a slight gap at the top of this where I think the thing vents to the atmosphere. But because it vents from underneath you can't really see anything "illegal".

Now after reading this thread I think I've installed it correctly, but I'm not sure.

CRW_1063_Medium.JPG

I haven't actually blocked anything off. Should I?

Also, I've left the blue screw in plug (drain) at the bottom of the catch can on.

Did I install it right?

**EDIT: figured out sk's drawings. All fixed now :D

  • 3 months later...
Busky2k Veteran

Busky2k

Posted
Posted (edited)

Well although I have an SR20DET, that install looks wrong. You've basically just looped it back into the cam cover again!

What you need to do is join the breathers on both sides together first, so that they _both_ go into the inlet of the catchcan. Then the outlet goes straight to the turbo.

Excuse the crap diagram but I hope you get what I mean;

catch.bmp

Edited by Busky2k
  • 6 months later...
Fry_33 Proficient

Fry_33

Posted
Posted

Hi,

Sorry to bring this thread back from the dead but I just have a quick question about the pipe from the passenger side cam cover to the turbo inlet. Is the lump in this pipe a PCV Valve? shown below.

post-13456-1148790456.jpg

Thanks

boss33 Contributor

boss33

Posted
Posted

nar buddy thats the return line to the turbo the same spot but on the other side of the motor ul see a lilttle hose that looks like an s thats the pcv conecting into the head my can is set up with the two hoses cuming of the top like the others but the return line is caped off inside that pipe and on the bottom of the catch can it has a nothere hose cabel tied down agenst the sump as if its going back in to the sump so if the cops look or pull on it it looks conected also the set up with 1 pipe going from the can then back to the return line wots the point in a none race enging bout 90% of wots runing through the lines is vapor witch is runing shit back through the turbo hence sucking in in pure air prity well defeting the pourpes of having a can to start with

Fry_33 Proficient

Fry_33

Posted
Posted

Thanks Dave :cheers:

I knew there was a pcv valve on the plenum side just wasn't sure if on the other side it was a PCV Valve or just some re-inforcement for the pipe so it isn't collapsed by the suction. Would I be right in assuming that this inlet pipe is sucking all the time.

I was thinking about installing my can this way. The PCV Valve in between the catch can and the plenum is the one from 'A' on the side of the cam cover. Will just need a male/male hose connection of the right size to replace it I guess. Would be putting a stocking filled with stainless steel wool inside the can too.

post-13456-1148812199.jpg

I had thought about installing it by putting something inside the S-shaped pipe to the plenum and then blocking the turbo inlet pipe. Then running a hose from the passenger side cam cover to one side of the catch can and the 2nd outlet down to near the sump. Just thought if pulled over then I shouldn't have any trouble with the top way.

  • 3 weeks later...
Busky2k Veteran

Busky2k

Posted
Posted

RedDrifter, the only problem with that is if you don't disable the PCV, it'll pull air thru the catch can on light loads due to vacuum and thus you got a nice vacuum leak. I run my catch can atmo from 3 points, and disable the PCV. Works perfect.

pplo, that setup is plain wrong. It doesn't achieve anything.

pplo Explorer

pplo

Posted
Posted (edited)

ok no worries..

just to clarify,, this is what i intend to do ..

the blue pictures are screws showing blocking off the pipe..

with the pcv, im planning to cut it in half (green line) then block off each path (blue screw pics)..

post-29258-1150689843.jpg

would all of this be ok??

thanks!

Edited by pplo

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