Jump to content
SAU Community

Catch Can Install Options (with Pics)

itbmils

By itbmils,
in Engines & Forced Induction

 Share

Recommended Posts

itbmils Proficient

itbmils

Posted
Posted

OK peeps

I've come up with 3 options for installing / plumbing my new oil catch can (separator) into my R32 GTR. There may be other ways – and I'm still open to suggestions.

The first image is how things look now. I have the breathers off the rocker boxes joined, with one side plumbed off to the plenum side and the other side plumed off into one of the turbo side AFM pipes.

Option 1: I leave the rocker box breathers joined, block off the plenum side, use a t-peace to join the secondary breathers into one side of the catch can, and then return back to the turbo side. This is still a closed system, and I assume it uses the vacuum pressure generated by the turbos to suck air/oil from the rocker boxes (through the can) and back into the engine.

Option 2: is very similar to option 1, only without the t-peace – and I rely on the standard join in the breathers to deliver the gas/oil from the left hand rocker cover over to the catch can

Option 3: I modify the catch can (or get another one) to vent to atmosphere, block off both the plenum and the turbo side and simply plumb the rocker breathers into the catch can. This is no longer a closed system, and I've herd stories of guys blowing the filter off their catch can, and ending up with oil residue all over the engine bay (oil fire !!). I can't see how this setup would manage to FORCE any of the oil/air mixture thru the can - but it seems to be a popular way of installing one of these.

Also - will blocking off the plenum / turbo breathers have an impact on tune (mixtures) etc

Talk to me guys – what is the best / safest way to do this

I plan to use braided lines throughout – and I will take pics along the way – so I can share this with anyone else wanting to do the same

post-11736-1146782574.jpgpost-11736-1146782594.jpgpost-11736-1146782618.jpgpost-11736-1146782632.jpg

Link to comment
https://www.sau.com.au/forums/topic/116451-catch-can-install-options-with-pics/
Share on other sites
Craved Grand Master

Craved

Posted
Posted

dont believe they have a pcv valve on those.

and they all look fine. only thing is the last option is illegal.

T piece option will be more expensive, but with braided lines etc i dont think you care :D

or you can replace the fitting on the rocker to be L shaped only.. run them direct to the oil/air separator, then a 3rd line to the inlet.

  • 2 months later...
Sydneykid Grand Master

Sydneykid

Posted
Posted
SK did a very good explanation of this, unfortunately the pics have gone, but the text should still help.

http://www.skylinesaustralia.com/forums/in...68174&st=23

My Pictures are still there

:teehee: cheers :P

Beer Baron Grand Master

Beer Baron

Posted
Posted

mate, your rocker covers aint sucking anything in if they aren't connected to the turbo inlet or the plenum. where is the vacuum going to come from???

Gary, of those 3 options listed which would you reccomend for a street GTR? light tune.

Mr. Oizo Grand Master

Mr. Oizo

Posted
Posted
mate, your rocker covers aint sucking anything in if they aren't connected to the turbo inlet or the plenum. where is the vacuum going to come from???

Gary, of those 3 options listed which would you reccomend for a street GTR? light tune.

reverse blow by? lol

Sydneykid Grand Master

Sydneykid

Posted
Posted
mate, your rocker covers aint sucking anything in if they aren't connected to the turbo inlet or the plenum. where is the vacuum going to come from???

Gary, of those 3 options listed which would you reccomend for a street GTR? light tune.

Option 3, I don't care if it's illegal, it's technically the best method.

:teehee: cheers :P

GTR1993 Mentor

GTR1993

Posted
Posted

ill take a pic of my one, option 3 style.

It had a chinese catch can on it, the inlet hole was littereally 3mm, pressurizing the crank case, was pushing some oil out the turbos on hard acceleration as you back off, i removed the catch can and let the pipes come stright out for a test run, no smoke nothing. So i constructed a free flowing catch can system works well.

I bought the filter for 30-40 (k and N)

sheet of alloy for 20 (could make 4 catch cans easy)

1m pipe of alloy for the filter attacment (8 bucks)

then 50 to get it all tigged up then i polished it my self

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • The Bogan
      The Ls1 R33 Of Fury

      By The Bogan · Posted

      Be more active mate.. , not taking the piss ❤️, your long term health will love you for it I would think something like a kettle bell or 2 laying around in areas you go past during the day would be awesome for ADHD.... "Oh look, a kettlebell", and exercise helps your brain health as well My mates son was a bit of a problem child, diagnosed wirh ADHD, and some other things that had his brain occasionally doing loops, until we got him into a training program, the difference after he started training was amazing, he had more focus, and his fitness levels exploded, it is like he is a totally different kid to be around Brain chemistry something something Stay fit stay strong mate
    • Duncan
      New fix for low tyre pressure from bmw

      By Duncan · Posted

      I had never actually looked into it, but aren't onboard compressors a thing in trucks?
    • sunsetR33
      Anyone have this problem with their temperature gauge?

      By sunsetR33 · Posted

      Read the ECU for fault codes or have someone else do it. A faulty coolant temperature sender is usually listed in ECUs. If the sensor itself is not busted it can also be a bad ground connection. Or in a really unlucky case, damaged wiring.
    • sunsetR33
      Anyone know this frontpipe?

      By sunsetR33 · Posted

      Can't be a Futjitsubo as those are made with a flex piece and Reimax is smaller in pipe diameter. If anything it is closest to a Mines pipe, but evidently it is not an actual Mines pipe.   Classic word humor
    • sunsetR33
      Anyone know this frontpipe?

      By sunsetR33 · Posted

      Alright I will try to not forget.   As GTSboy replied to you already, problem is mainly the mismatch between the actual exhaust part and the denomination in the papers. That basically just looks like tampering to a cop, if they were to check your car and notice. If it had been done right they would have clarified it to be a custom pipe and just given it a certain part number that you have to engrave or weld onto the pipe. I will definitely inquire on what to do. Changing the pipe wouldn't be my favorite solution as it costs a bunch of money and the cat was fitted with the front pipe and exhaust under the car, and if the front pipe flange does not sit in the OEM location the cat will need to be refit for any other pipe to work. It also usually doesn't need a brand name or something like that, but more something like a part number. Usually for exhaust parts, on silencers and cat units specifically, there is a badge that reads the certificate number that belongs to these exhaust parts under EU regulation. You get these numbers after you put a part or group of parts through the tedious testing according to EU vehicle legislation and they pass. You can find these "part numbers" on various parts throughout a EU vehicle. On windows, headlights, engine parts, seat belts and so on. All these parts have gone through standardized testing and acquired a so called ECE or EG Certificate that makes them legal to use by themselves in all countries that adhere to these standards. You can also not alter these parts in any way, if you do they become illegal. An example for stampings on an exterior lighting part, the people who need to know can find the documentation for this unit in a database. I do not know what all the standards and so on mean.
×
×
  • Create New...