Oil Catch Can Install Guide

that should be fine IMO

 

I would mount it at a lower level than the hose coming from the engine. The oil comes out in vapor form and as it runs up the line some of it will condense and turn into liquid. You would want the liquid to drain into the catch can and not back towards the valve cover. Just my $0.02.

 

The oil doesn't come out in vapor form, it comes out due to pressure in the engine. The original hose from the valve cover travels up to the intake, not down. The intake on my catch can is above the valve cover, and I catch tons of blow-by.

 

Anybody decided whether the screen on the inside is good to have or if it doesn't matter? Seems like if you didn't have one but then added the filter on the line back out your kind of getting the same result. I know the screen on the inside is meant to help keep the oil from going back thru the engine but if you have the filter on there you stop it. Seems like the screen on the inside would get clogged eventually. Just throwing that out there I don't know if my assumptions are anywhere near remotley correct.

 

Some info I found after posting that. One of the readings I found particularly helpful is this one:

Oil Vaporization:

The space inside the crankcase is not just full of air and gases. It is full of oil mist. The oil pump supplies oil under pressure to the crankshaft and connecting rod bearings, which falls out of the clearance gaps between the bearings and the crankshaft. There may be oil cooling jets aimed at the bottom of the pistons. Oil is also supplied to the cylinder head to lubricate the valvetrain. All of this oil is left to find its own way back into the oil pan under gravity. However, on its journey back the oil is very likely to encounter the rotating crankshaft, which will whip the oil into a fine mist. Inter-bay breathing (the motion of pressure pulses between the underside ascending and descending cylinders) will pull the oil back and forth. In short, the conditions inside the crankcase are not conducive to letting the oil return to the oil pan.

...the crankcase is still full of airborne oil particles, and these will get swept along with the blow-by gases and carried up into the cam cover.

Catch cans:

There is another type of oil separator which has a similar purpose, but a different usage and necessarily different design features, and should not be confused with oil separators: Oil catch cans. A catch can’s job is to separate the oil from the blow-by gases, but instead of returning it to the oil pan, it retains it in a chamber which must be emptied periodically.For obvious reasons, catch cans are not used in OEM applications, but due to them not requiring an oil drain back the crankcase (and therefore no mechanical changes alterations to it), they are popular as aftermarket self-fit items. They are also very useful in engine development because they offer a way of measuring exactly how much oil is being carried over into the breather system. Indeed, catch-can tests are a required part of new engine development and test programmes to demonstrate the effectiveness of the breather and oil separation systems.

In a test environment, oil catch cans are inserted into the WOT and partthrottle breather pipes, and the engine is run at specific speeds and loads for extended periods of time to determine an average rate of oil carry over (measured in grams per hour).

More here: http://www.106rallye.co.uk/members/dynofiend/breathersystems.pdf

 

Bueller? Bueller?

 

eh idk. i have a mesh insert type material and works like a charm

 

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Do ya'll think the NEED for a oil catch can would increase if you had a supercharger kit installed????? I'm thinking it would. Thoughts?????

 

yes, Super charger guys have way more blow off from what i've seen in a few pictures

 

I was thinking of going with something like this. I have a plow and limited room.

 

Crankcase vapors come out in...vapor form! Check most high-hp turbo/SC dyno videos - the catch can is blowing excess vapor out.

Yes, I also urge you to relieve crankcase pressure (have an open PCV system) If you begin to experience more blow-by than stock and the excess pressure is not vented your ringlands could crack.

 

I was thinking of going with something like this. I found it on another site and pretty simple to build and most importantly to me is small. I have a plow and emergency lighting that's taking up most of the spots others have installed catch cans. figured since the truck is new now would be a good time to install this.

 

Interesting, does the oil phase change from a liquid to gaseous form? Or is it frothed up from the moving parts / pressure and allowed to be carried along the blow-by as a mist?

 

Think of a supercharger as a massive vaccum sucking on the PCV system.

When in boost, it will pull even more air than when not.

 

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Vapor is smaller particles, mist is larger particles, they are all airborne. It's like getting water on yourself by standing near a waterfall... you are not in the water stream, but you are still getting wet because the water is being churned up and some of the smallest bits stay airborne. Even if the engine were not churning up the oil, a few oil particles would still be airborne in the crankcase due to the saturated environment.

 

what size is the factory hoses?
Anyone Boosed install their catch can yet? Im thinking about changing out the media in my CC before install

 

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3/8"