petwhookie

iTrader: (-1)

So my catch can is filling up really fast after a 20 minute session on the track. The can will fill up about 1/2 of a normal water bottle of oil. I have to drain my oil after every session. Is it even suppose to fill up that fast? Should I add a drain hose to my setup?

My setup is 2 hoses from the back of my block (NA GSR) to the catch can with a pcv valve on top of the can that runs back into my IM.

Atmosfear

iTrader: (18)

The main purpose of a catch can setup is to keep the oil vapor out of your intake tract, which is why you typically see a filter on top of the catch can as they are just vented to the atmosphere.

The setup you have is still using a PCV, and is still venting right back into the intake manifold so you are kind of defeating the purpose of having a catch can.

Lo-Buck EF

the way you have it set up makes no sense.
the 'correct' way is to block off the ports ont he back of the block and run 2 lines off the valve cover.
if u wan to run it off the block, keep the black box as it slows down the vapor (and oil) with its baffles.
other than that, you may have another internal engine problem.

petwhookie

iTrader: (-1)

The thing is, the original hole where the black box sits is welded shut. I had a crack there so I had to weld it. Knowing that what do you guys suggest?

Lo-Buck EF

i know a few people had this issue (catch can filling up too fast running off the back of the block)
your best bet and sure fire way to get it running right is to run 2 lines off the valve cover to a catch can with a couple breathers on the top

petwhookie

iTrader: (-1)

Hmm... so vent the valve cover. But what about my issue without being able to run a black box?

Lo-Buck EF

you wont need it if you run the lines from the valve cover to the catch can

Lo-Buck EF

like that

Jenkinsal2

So what happens to the PCV in this setup? ^^^

petwhookie

iTrader: (-1)

Lo-Buck EF, so your saying. Block off the ports on the back of the block, no black box okay, and just have the valve cover run hoses to the catch can?

JW racing

You do have it plugged and thats good.When you remove the black box,we drive a plug in the block right there.Then run the catch can and 2 lines from the valve cover,eliminating the stock pcv setup.

If the can is filling that fast,you have some serious blowby from your rings.

vinuneuro

Why can't you put the catch can between pcv valve and intake manifold (and not vent it)?

JW racing

You can do it that way as well,but the vapors are re-entering the engine still.

A point many overlook in the purpose of a catch can and vapor evacuation is that it lowers the octane rating of your petrol.I am not a scientist in this category but I hear it is due to the oily vapors.The air quality board requires that we recycle this vapor and avoid emissions,so the pcv system was created.I run my valve cover hose to the intake as stock with a PCV box-less K series,because when I have a catch can it stays dry,so why run a can that takes up room when I know my motor burns clean and the rings are sealed.

All engine blocks need to have ventilation,old muscle cars just had a breather on the valve cover.Thats the reason you see ricers adding the little K&N directly to the valve cover.lol
Just a matter of if it is a street car then leave the oem pcv system,if it a race car plug it...and if you catch that much oil that you need a catch can ,you need a rebuild!

Lo-Buck EF

because it defeats the purpose

vinuneuro

Do K series have better ring seal than B and H motors at high rpm? It seems like this is a standard issue with the previous gen Honda engines.

Is your tube going between the valvecover and manifold or intake pipe? If to the intake pipe, is the crankcase pressure higher than what's in the intake stream with the pcv system removed?

My main concern with a vented catch can is moisture from the atmosphere condensing in the oil when the engine isn't running. The can I've been considering is the one Walter McKinney sells. It's baffled and partitioned so those nasty oil vapors should be removed. A bit expensive for what it is though. Thoughts on this?

Goes between pcv and manifold.

http://www.mckinneyraceworks.com/cat...products_id=82

JW racing

I like your style....You are one of the few to notice the pattern,I completely agree the older(sorry B series lovers) engines are very prone to filling up catch cans and I am still trying to understand after all this time using B series in the past.It is about The lord of the rings my friend..

Is anyone a fan of Kobe Bryant? Well I was born the same day,down to the hour;his work ethic and confidence is unmeasureable,kind of like mine.I am confident enough to say I think the tolerances are different in the engines,possibly.However I am very confident in the answer lying in the way the rings are clocked and gapped.I have witnessed OEM Honda factory built engines(various mileage B and K(S2000 are notorious)) fill up catch cans,I take the motor apart and am amazed to see the rings are hideously set and look nothing like the manual dictates.When I re-ring and clock them my way(Honda's way),the engine never smokes,does not burn oil and makes crisp power.Oh and no more filling catch cans(or intake pipes and manifolds in stock cases I work on).

Turbo applications are another story,the amount of blowby in a turbo is higher,even my stock SRT-4 fills up catch cans quickly;but then again that is a blanket statement as I havent opened the engine either to see if the oem JE rings are clocked correctly....sigh.

http://www.worldnci.com/_images//gif...by_300_GIF.gif

93supercoupe

if your only drawing from the VC, then your not evacuating the crankcase.Try running a line from the crank case and VC.

And if ur catch can is behind the engine, then either move it higher or in front of the engine to avoid it filling so quickly.

JW racing

I am afraid it is.
There are oil return passages that let oil run from the top of the head where the cams are to the oil pan,this is where blowby occurs through to the valve cover,This is why we eliminate the B Series box and run it like a K series.
Honda designed K series with a VC only vent on purpose and I think they nailed it's design and tube size,as the entire engine speaks for itself with the quality and design over B series from the roller rockers to the 2pc block.

slammed_93_hatch

High compression NA K motors do blow a good bit of oil vapor. They don't fill up, but they will blow some out even with a baffled can.

Lo-Buck EF

mine doesnt fill up quickly at all or burn the usual b-series ammount of oil. and i run one line off the black box with no pcv and one from the valve cover. both to a vented catch can.

JW racing

Of course all engines blow some vapor by and it will collect wether in a can or the intake pipe, will be moist to the touch(like my women)..That's a healthy,normal engine.That is why the factories have to recycle the vapor for emissions.

The extreme filling of 1/3 or more quarts of oil in a session is definitely a bad sign.

petwhookie

iTrader: (-1)

So from what everyone said so far, it seems like I set up my catch wrong or my motor is bad? (pretty sure my motor is okay, its at 12k with a rebuild)

My black box is unusable so according to Lo-Buck EF, I should just plug the ports that's located behind the block. And just run my catch can with my valve cover. Can anyone confirm this?

BUT..some people told me to drill a hole on the bottom of my catch can and run a drain system back into one of the hoses with a T fitting. This doesn't seem the best because all that 'bad' oil is going back into my motor.

Andrie Hartanto

K series has PCV. It is on the top of the water pump housing. Or they call it water passage. It is a good place to tap a pressure sensor on to monitor crank case pressure.

hondaapi

We only have turbocharged B-series engines and run them hard on the track.
We run external catchtank on battery location. We route two or three lines from the valvecover (ecach half of an inch in diameter) to the upper area of the tank. We
also route two lines from the back of the block (each half of an inch) to the lower area of the tank.
This acts like a drain when there is less load on the engine and l like a vent hose when there is a lot of load on the engine.

This system worek very, very well for us and we could do 45minutes stints without any problem on our cars.

Before we had this catchcan setup our engines pucked out the oil everywhere :-)

Hope this helps a little bit?

Jenkinsal2

So then If I wanted to keep my stock pcv and only want to get rid of the oil vapors in my car, (non turbo) Would this work?