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Oil Catch Cans?


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18 replies to this topic

#1 Caboobaroo

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Posted 25 February 2005 - 08:49 PM

Whats the purpose of oil catch cans? I was looking up stuff on ebay and I seen them for WRXs and other turbo'd cars so whats the deal with them?

#2 ballitch

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Posted 25 February 2005 - 08:55 PM

when you do a lot of hard cornering, the oil in the oil pan shifts to the opposite side of the turn, centrifugal force thing doing it, and the oil cant be picked up by the oil pump, motor starves for oil, not to mention turbo starves, and motor goes bang, a catch can is mounted higher than the motor to store oil and give the motor oil while cornering, also adds to the amount of total oil in car, double the oil, the longer it lasts, not to mention you can add an oil cooler really easy.




~Josh~

#3 RedRX

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Posted 25 February 2005 - 09:52 PM

when you do a lot of hard cornering, the oil in the oil pan shifts to the opposite side of the turn, centrifugal force thing doing it, and the oil cant be picked up by the oil pump, motor starves for oil, not to mention turbo starves, and motor goes bang, a catch can is mounted higher than the motor to store oil and give the motor oil while cornering, also adds to the amount of total oil in car, double the oil, the longer it lasts, not to mention you can add an oil cooler really easy.




~Josh~


Actually hard corner issues are dealt with by dry sump systems. Catch cans are designed to separate/catch oil vented by crank ventilation system and stop oil vapour being sucked into the turbo (oil droplets can lead to detonation).

#4 tizzle

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Posted 01 March 2005 - 03:07 PM

bump, I want to hear more about this, since I happen to have one of these sitting around. Anyone done any modifications to their pcv setup?

#5 MorganM

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Posted 01 March 2005 - 03:13 PM

A local guy in the MN Subaru club just did a sweet write up on adding a water seperator to the PCV system. Catches all that wonderfull stuff instead of shoving it down your intake. It was originally posted on a Hyundai forum. Clever idea; basicly just uses a water seperator for air tools.

#6 tizzle

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Posted 02 March 2005 - 01:11 AM

any links?

#7 moshem74

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Posted 02 March 2005 - 01:15 AM

http://www.angelfire...o/MR2_PCV2.html

#8 MorganM

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Posted 02 March 2005 - 11:48 AM

any links?


http://www.mnsubaru....p?TOPIC_ID=1697
- Local MN Subaru club member's write up. Might need login for the forum, not sure.

http://www.hyundaipe...pic.php?t=46353
- Original write up on Hyundai forum. Don't think you need a login to view becuase I dont have one and I could go right to it.

* enjoy *

#9 All_talk

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Posted 02 March 2005 - 12:49 PM

That “paint can” catch tank that MR2 guy made is pretty cool. The water separator could work well to.

In most cases oil control problems are due to bad rings, but boxer engines seem to have more issues than some others. I think it has to do with the lack of height between breather outlets and the PCV valve (old VWs have problems too). Turbo cars have it even worse because of the positive manifold pressure, when on boost you either have to draw the crank case vapors through the turbo or let them build up in the case, on sustained boost this can be a big problem. Having a good separator makes the drawing through the turbo a lot better.

To get the oil to drop out, you need to slow down the flow and cool it, lots of surface area for the oil to collect on will help to. The paint can idea is good but the inlet should enter lower in the can and I’d but a layer of very course steel wool between the inlet and outlet. Having the plumbing run through the lid would be good so you could remove and clean the can easier.

Just some thoughts
Gary

#10 archemitis

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Posted 02 March 2005 - 05:34 PM

i took a nalgene bottle, and ran my breather hoses to a t. drilled two holes in the top. shoved the breather hose in one hole, and stuck one of those ricer filters in the other hole.
my motor doesnt have much blow by at all, but i had about a half a cup in there after 500 miles, mostly water from this cold weather. some oil.

i use it on na cars to keep my intake from getting filled with oil and dirt/carbon.

#11 FirstSubaruGLwagon

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Posted 04 May 2006 - 04:01 PM

I added up the parts and labor involved to build one,, and if you had to buy these parts . it is much cheeper to buy the whole thing!
http://cgi.ebay.com/...mMakeTrack=true

http://cgi.ebay.com/...062619709QQrdZ1
Posted Image
10 dollars for item and 20 for shipping, not bad.

#12 nkx

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Posted 05 May 2006 - 12:54 AM

Catch cans are designed to separate/catch oil vented by crank ventilation system and stop oil vapour being sucked into the turbo (oil droplets can lead to detonation).


i dont know about detonation, but i dont want an oil lined intercooler. that kills the intercoolers ability to efficiently disippate heat.

#13 mikeshoup

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Posted 05 May 2006 - 01:19 AM

Question about catch cans, how do they get plumbed in? The ones I see have one inlet and outlet. So how would this work on the Subarus, where you have two tubes coming off the valve covers, and one coming from the PCV Valve? Would you have to merge all three, run them to the inlet, and then run the outlet to the intake tubing?

#14 Dylan86GL10

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Posted 05 May 2006 - 09:09 AM

Here's the way mine is run:
Pass side stock

Driver side, run straight up into "Brake Booster filter" from the "help" section of Advance to let the vapors expand and condense on the filter and run back into the motor, from these it goes into an ebay catch can mounted where the A/C was, then into the pcv valve. Total Cost: About $20

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#15 azsubaru

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Posted 05 May 2006 - 10:07 AM

A reasonable price, but you can make your own out of spare parts.

Check out this thread:
http://www.ultimates...ght=condensator

I made one with a freebie IBM coffe mug, some standard heater hose, steel wool, and fittings.

#16 FirstSubaruGLwagon

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Posted 05 May 2006 - 03:37 PM

Posted Image

Hey Dylan, Are you puting that motor in the poopwagon?

#17 Dylan86GL10

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Posted 05 May 2006 - 05:54 PM

Hey Dylan, Are you puting that motor in the poopwagon?


Poopwagon here we come:
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#18 FirstSubaruGLwagon

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Posted 05 May 2006 - 07:58 PM

nice olive drab ;) youll have to rename it, unless you thinking of babypoop:grin:

#19 Dylan86GL10

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Posted 05 May 2006 - 08:36 PM

nice olive drab ;) youll have to rename it, unless you thinking of babypoop:grin:


Split pea-soup wagon




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