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Old 09-12-2009   #1
Skym
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Default RB20DET oil catch tank (race setup)

RB20DET oil catch tank (race setup) -

http://skylinist.blog.eonet.jp/hcr32...post-2c18.html

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Dual catch tank is often seen on RB racecars, but without understanding of how it works. This dual catch tank setup allows oil to be returned to sump. Also is recirculated into intake instead of vented to atmosphere on pro racecars.

Last edited by Skym; 01-29-2010 at 09:22 AM.
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Old 09-12-2009   #2
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Default Re: RB20DET oil catch tank (race setup)

I like it, they are actually using a vacuum source to evacuate the crank case. I cant stand the people you just stick two valve cover hoses to a tank and call it a day.

Intake source +1
good find


I do like the simplicity of the r34 nismo catch tank. Single tank setup with drain and intake hose.
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Old 09-12-2009   #3
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Default Re: RB20DET oil catch tank (race setup)

Gibson R32GTR, Mines R34GTR are cars I have seen this dual catch tank setup on.

This dual catchtank setup is how I'm going to set it up on my car's engine. Now to figure out where the drain catch can came from. Or is it a custom catchcan.

Last edited by Skym; 01-29-2010 at 09:23 AM.
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Old 09-29-2009   #4
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Default Re: RB20DET oil catch tank (race setup)

So the first tank inline has a drain and the second is just a simple catch can ?
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Old 09-29-2009   #5
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Default Re: RB20DET oil catch tank (race setup)

Yes. First tank drains to the sump. Second tank intercepts any leftover oil in blowby gas and only air is recirculated into intake infront of turbo.

Last edited by Skym; 01-29-2010 at 09:23 AM.
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Old 10-01-2009   #6
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Default Re: RB20DET oil catch tank (race setup)

Update...

This is the enginebay from ex RICOH GTS-R racecar -

http://www.skylinesaustralia.com/forums/post-a226835-

Note the same 2x catchcan setup and can just see return fitting for hose under 1st catch can / bottle.

Gibson R32GTR with 2x catchcan setup -

http://xs123.xs.to/xs123/08052/winnie_3167.jpg

Mines R34GTR -

http://blog.gtroc.com/dino/mi8.jpg

Different styles of the same setup.

Last edited by Skym; 01-29-2010 at 09:24 AM.
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Old 10-01-2009   #7
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Default

The whole point is to simply intercept the feed PRIOR to the PCV valve, regardless of how many times you do it, so I am sure there are many creative ways to accomplish this.

Along with Mine's Baffles, I am simply going to run either a Nismo Oil Separator or another type of 3-port baffled catch can with drain combined with an air Tool Filter (clear) right before the PCV so that I can monitor the efficiency of the system as others have done.



Alot of Mustang guys are turning Air Tool Filters into Oil Separators on their own, but like I said, it will be my secondary in-line 'inspectable maintenance point' just before the PCV....goes for anywhere from $25/each to as much as $100 depending on where you get them.


Last edited by Allan74; 10-01-2009 at 05:31 PM.
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Old 10-01-2009   #8
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Default Re: RB20DET oil catch tank (race setup)

now that looks pretty haha. it would fill on a skyline in about track day too
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Old 10-24-2009   #9
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Default Re: RB20DET oil catch tank (race setup)

I just picked up a nice Oil Separator Kit w/drain from Yahoo Auctions. A brand new custom kit made in Japan by some shop that resells them on Yahoo Auctions.... that attempts to do what the Nismo kit does, but for less than half the price (Nismo kit is about $525 USD Shipped from RHDjapan). Started out as 14.5k JPY + fees and shipping, making it just over $200 USD. It's nearly the size of a pop can and is nicely built from the look of it.

I am going to run this as the Primary, then a clear unit as I posted above just before I feed the line back into the PCV so that I can monitor the efficiency of the system. If needed, I will run a secondary catch can/tank if the clear unit fills too quickly.


Last edited by Allan74; 10-24-2009 at 10:55 AM.
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Old 10-24-2009   #10
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Default Re: RB20DET oil catch tank (race setup)

Quote:
Originally Posted by mcfly View Post
I like it, they are actually using a vacuum source to evacuate the crank case. I cant stand the people you just stick two valve cover hoses to a tank and call it a day.

Intake source +1
good find


I do like the simplicity of the r34 nismo catch tank. Single tank setup with drain and intake hose.
why do you need a vacuum source? The crank case builds up positive pressure that will push the vapours out no? I just ran a hose from one of my valve covers to the catch can then vented the other port to atmosphere.
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Old 11-07-2009   #11
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Default Re: RB20DET oil catch tank (race setup)

Allan74, do you have a link to that catchcan setup on Yahoo Auctions???

Looks like the same catchcan set on the RB20DET in my first post.

Another interesting catchtank setup on SAU forum (blue car with RB25DET) -

http://www.skylinesaustralia.com/for...1.html&st=2360

Last edited by Skym; 01-29-2010 at 09:25 AM.
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Old 12-13-2011   #12
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Default Re: RB20DET oil catch tank (race setup)

Quick question, when you want to drain your oil back into the pan (like in the op), do you need a one way check valve or something before the fitting on the motor? I see something in the diagram posted but I'm not sure if its a check valve or just something else.
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Old 02-21-2012   #13
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Default Re: RB20DET oil catch tank (race setup)

Tell me if I get this right pressure from intake push air out of valve cover to an oil separator that dtains in the pan then the air goes to the next can where left overs stay in can then air goes in front of turbo intake to be "re-used". If that is it I'll make myself one this weekend.

Is the oil seperator any diffrent in desing then a regular catch with bottom drain except smaller?

Thankyou
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