When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I wasn't catching squat either for about 3 weeks, and what I did catch was peanuts.. Not only that, oil was being sucked out of the can and into my whipple intake snout.
They recommend either way now, especially to the blown mustang crowd. I personally have been having great luck with it flipped.. If you search even more, you'll see they are also offering a screen filter that basically does what my stainless lint trap filter does.. Check my thread I linked to you a couple posts back and see..
This pic is right from JLT's site..<br/>Filter on the outlet of can.. <br/>
Boy I wish Crash was here to settle this filter business. Lol. Just kidding. He would tell us all we don't need catch cans and that a properly built motor won't have blow by and to use. $500 pump to make the rings seal better lmao.
I checked mine a few weeks back and it was full of oil at 3000 miles so I need to check it more often. I also want to do Especial mod to the can. Maybe this weekend.
It's basically a check valve that doesn't allow boost into the crank case, but I am not really sure how it reduces oil in the intake.
I know that if boost goes into the crank case, it will pressurize it more, and will cause more to come back into the intake through the PCV, but in theory, all the krank vent should do, is limit it back to NA amounts of oil...
And in theory, my ecoboost PCV should work the same, the Krank Vent might be a little stronger, but not sure how it keeps oil out.
Keeps oil out by physically blocking it from going through the valve would by my assumption.
Do you hear any whistling or howling from the krank vent?
Does your throttle body stay clean?
If this thing blocks boost through the vent than I'm assuming it's gonna release a spit of oil mist at the very least when it finally opens to relieve or bleed off pressure. That or the oil gets pushed out the PVC breather inlet..
Unless you run 2 krank vents?
Here's what I found for an explanation on the ecoboost PVC
During engine idle there is a huge vacuum in the intake manifold, less and less vacuum as the throttle plate opens more and more("A"), until at WOT the BOOST comes into play and the intake manifold begins going positive with respect to atmospheric pressure("B").
A.) The reverse flow prevention check valve remains open as long as the pressure on the crankcase side is higher than the intake manifold. So the airflow path is from the air hose connection just downstream of the engine air filter (filtered air), through the engine crankcase and then out the check valve and into the intake manifold, subsequently entering the combustion chamber and being burned.
B.) If/when/once the onset of boost results in the intake manifold pressure going positive with respect to the crankcase pressure the check valve closes blocking any flow into the intake manifold from the crankcase. Now, any blowby that would otherwise pressurize the crankcase simply flows out what was the inlet path/hose, through the turbo impeller, CAC, and enters the intake manifold etc, etc.
The engineering design theory being that if the crankcase gasses (etc.) are continuously evacuated in the manner there will never be enough gas/oil/water/etc. entering the combustion chamber all at one time to adversely affect the engine operation."
For the record...
I completely disagree with NOT using a catch can.
Last edited by Especial86; Jun 15, 2015 at 07:03 PM.
You install the krank vents one each valve cover. They have an arrow that points away from the valve covers as they are one way valves. I get no noise from them, the oil cap and dipstick are physically hard to remove due to vacuum staying in the crank case. I use to have a lake of oil behind my throttle body in the 90 degree Whipple inlet, now I have nothing. I use to check every oil change, now I don't anymore because oil has never returned. Last 3 times I've checked.
You install the krank vents one each valve cover. They have an arrow that points away from the valve covers as they are one way valves. I get no noise from them, the oil cap and dipstick are physically hard to remove due to vacuum staying in the crank case. I use to have a lake of oil behind my throttle body in the 90 degree Whipple inlet, now I have nothing. I use to check every oil change, now I don't anymore because oil has never returned. Last 3 times I've checked.
I wonder how your intercooler looks? The Krank vents make sense as far as preventing the PCV system from seeing boost but that's not a problem on our positive displacement blowers.
So my thinking is that under vaccum the PCV system ventilates the combustion chamber as it should and thats when it pulls in the fine oil mist. That mist would remain displaced in the air until it hits the intercooler or base of the manifold. If bad enough it would even collect on the throttle plate and drip into the throttle body which obviously it's not on yours.
One of the misconceptions that I had was that the traditional PCV valve was just a check valve. But after reading more on this forum and others, it is much more than that. At idle the PCV is mostly closed, I would have thought it would be wide open, but the addition of CC gases at low speed can greatly affect the A/F ratio so it is almost closed, then as speed increases the valve to the CC opens more to pull the extra CC gases out.
Last edited by MeanGene; Jul 6, 2015 at 03:02 PM.
Reason: Spell Check
Take the stock PCV out (takes 5 seconds) and blow into it from the intake side, there will be no resistance. Do the same with the Ecoboost PCV and it will not allow pressure through.
