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Location:
sunny coast, qld
Registered:
October 2002
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1jz oil catch can or other?
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Sun, 21 November 2004 02:40
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I am in the process of going single turbo on my 1jz and I cannot fit the inlet pipe on the front of the turbo so I am going to be running the air filter right on the fron of the turbo. Like this:
Now I want to know what I should do with the outlet of the PCV valve. I don't have any inlet to plumb it back into. So I was thinking of running the pipe off the cam cover to an oil catch can, blocking the outlet of the catch can and fitting one of those little filters on it so it can breathe. Does this sound ok?
The one thing that has me confused is how the vapours will get to the catch can as I thought that the vacuum from the inlet sucked the vapours out of there?
thanks
Chris
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Location:
Brisbane
Registered:
May 2002
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Re: 1jz oil catch can or other?
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Sun, 21 November 2004 05:57
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hey mate, I thought the way it worked was that you put a little filter (or leave it as it was setup stock, not an option in your crazy huge turbo case  ) on the cam cover closest to the turbo...the PCV valve is on the other cam cover, and I think the oil catch can plugs in between the outlet of the PCV valve, and the inlet manifold (instead of the hose that just connects them stock). This means you still get the proper PCV function, and its still legal as well I believe!
at least I think thats how it works 
Cheers
Wilbo
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Location:
Adelaide
Registered:
May 2003
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Re: 1jz oil catch can or other?
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Sun, 21 November 2004 06:01
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The crank case will be under pressure normally so it will be ok.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz oil catch can or other?
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Sun, 21 November 2004 10:15
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thanks 
ok, yeah Wilbo I meant the outlet on the turbo side as you probably knew. But I thought they were both called PCV valves so you know what I mean.
Also, I would just put a filter on it but I can't fit it there because the damn turbo is too big! 
And the other option I thought of was to just run a pipe from the outlet to a filter but then I thought I may as well just get a catch can so I don't get oil dripping and I can get one cheap at the moment.
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Location:
Perth
Registered:
October 2002
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Re: 1jz oil catch can or other?
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Mon, 22 November 2004 07:04
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Chris,
If you're venting to the atmosphere (even after collecting oil into the seperator), wouldn't it be safer to put the outlet somewhere stealthy? I just think a filter in the engine bay is going to look like a cop-magnet. Though with all that lovely hardware hanging off the left of your block ...
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Location:
Brisbane
Registered:
May 2002
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Re: 1jz oil catch can or other?
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Mon, 22 November 2004 07:38
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I think that the catch can should go where I said (if you have a look the PCV valve is clear to see on the cam cover closest to the inlet manifold, its a little block thing with a right angle I think, that plugs into the cam cover...). And run a hose from the turbo side cam cover to a little filter nestled somewhere (can ya still get a hose onto it with massif turbo? lol maybe you will need a molded 90deg hose?)...
Cheers
Wilbo
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz oil catch can or other?
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Mon, 22 November 2004 07:58
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See how Danish has done his. From what I can see, the inlet manifold side is left stock. And the turbo side goes from cam cover to catch can and then back into inlet. However, my problem is I don't have an inlet
So I was going to leave the inlet manifold side stock and just get rid of the oil vapours altogether and not run it back into the inlet at all. yes i know it is a little illegal but everything is these days.
so is this ok?
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Location:
Brisbane
Registered:
May 2002
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 10:33
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ahh, yeah, doh...lol (i was wrong with where I said to put it)
had to have a bit more of a think of the whole setup (I was going off how an non turbo setup works )  (on the up side of being wrong, I'll know how to set mine up now lol)
yeah set it up like danish lol but ya cant! So you'll have to have it vent to atmosphere (pref somewhere stealthy?)
Cheers
Wilbo
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 10:43
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sounds good
you will set yours up like Danish also then. Except you may have a "gen 1" 1jz.
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Location:
Adelaide
Registered:
May 2003
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 10:50
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Yeah just vent to the can. Thats what i have to do as i dont have an intake plenum to vent to.
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Registered:
March 2003
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 11:31
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Catch cans are useless, that is my oppinion.
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Location:
Brisbane
Registered:
February 2003
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 11:36
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when i put the new intake on the 18Rt, i was going to send crank casegases to a catchcan that had:
-a vent+filter on the top of the can with a one way valve allowing pressure to vent to atmo
-a vent-line with a PCV valve inline to the plenum to allow the engine to scavange fumes when not on boost
if the DoT objected to the vent+filter, i'd change that to a vent-line going to upstream inlet of the turbo.
you could probably do something like that chris so you're not always venting to atmo.
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Location:
Adelaide
Registered:
May 2003
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 11:38
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Danish, you are on smack. Catch cans are not only better for your engine, as you dont have oil in your air intake which reduces the effective RON rating and promotes pinging. But you also reduce emissions.
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Registered:
March 2003
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 11:56
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Only if your engine is a piece of shit... I never had any oily gasses, hence why I took mine off. It was on there for 6 months without any hint of oil condensation.
Smak that up.
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Location:
Adelaide
Registered:
May 2003
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 21:06
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Probably because you were using a crappy catchcan where the gasses were still hot enough to be sucked straight back into the intake without condensing in the can. Good catch cans have an oil air seperator within them to collect the oil.
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Registered:
March 2003
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Re: 1jz oil catch can or other?
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Thu, 25 November 2004 21:47
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The can was away from the engine, the piping was long enough for gasses to condense in itself.
You are incorrect, my engine produces minute oil gas. A lot of the time it is older engines that need catch cans.
It wasn't CRappy, it was a GReddy can.
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Location:
sunny coast, qld
Registered:
October 2002
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Re: 1jz oil catch can or other?
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Fri, 26 November 2004 02:46
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omoshiroi ne!
Interesting
The main reason I am using a catch can is because I can't fit a filter on the outlet because my turbo is too damn big!
I can assure you there is not going to be any oil going back into my inlet considering that there is going to be no pipe connected to it
and it is cheap as chippies
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Location:
Perth
Registered:
October 2002
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Re: 1jz oil catch can or other?
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Fri, 26 November 2004 02:58
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Hey Chris: I'd still be a bit stealthy as to how you vent to the atmosphere. Those little filters are cop-magnets.
Danish: I hear ya! 3 months of catch-can inspecting on the 1JZ and hardly a smear of oil in the damn thing.
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Location:
Brisbane
Registered:
July 2004
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Re: 1jz oil catch can or other?
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Fri, 26 November 2004 15:29
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I have been looking at these catch can designs a while and I think that no matter what expensive brand name is on the can,if it isnt big enough to allow the speed of air flow to slow a lot I cant understand how the oil particles {mist} could remain in the can?
I am thinking to use a small motorcycle oiled foam element style air filter to filter the oil out of the air as it leaves the catch can.This will ensure no oil enters the inlet?
Opinions? Anyone seen a design like that? Cheers.Pete.
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Location:
Adelaide
Registered:
May 2003
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Re: 1jz oil catch can or other?
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Fri, 26 November 2004 15:49
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Most good cans will have an oil/air seperator in them, so as to condense the oil. This can be achieved in cheap ones by simply filling them with steel wool. Gets the same effect.
Of course only do this if you are venting, as having bits of steel wool fly into your intake isnt good mmmkay
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Registered:
March 2003
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Re: 1jz oil catch can or other?
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Sat, 27 November 2004 02:01
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The change in temperature from extremely hot engine, to ambient catch can is what condenses the oil.
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