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Catch can help!!!

Kuuups

By Kuuups
in Modifications & Accessories

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HeySkippyDog Senior Enthusiast

HeySkippyDog

Posted
Posted
I really don't think that makes a difference. Both of them in the end collect the oil the same way. The Catch can relies on vacuum & not gravity. Doesn't matter if the can sits high or low. But I get it. I can be picky too! 
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I mounted my E2 to the bolt that goes through the washer fluid reservoir. Works just fine.

I can hear a slight noise with the hood open, I attribute that to the longer lengths added to that PCV circuit and my one-way inline check ball valve to stop oil going back in.

other than that, 0 effect on the performance of the engine.

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LRod Enthusiast

LRod

Posted
Posted

Yeah in the end I don't think functionally it really matters where it's mounted.

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JLaw297 Enthusiast

JLaw297

Posted
Posted

Any thoughts on the UPR Single Valve catch can? Have heard good things about their units as well.

 

From what I gather - the single valve catches PCV operation during idle, while the dual catches from the PCV that operates both during idle and acceleration or WOT. Do these engines have much "blow by" naturally aspirated that would make the dual worth having? I could see in a turbo application, but what about NA?

3tspapat Enthusiast

3tspapat

Posted
Posted

I have UPR's single and Elite's CSS. Both quality pieces. I went with UPR's cc as there was a deal at the time so it was more affordable and also came with braided hoses and the inline check valve. 

JLaw297 Enthusiast

JLaw297

Posted
Posted

So when I look at the dual valve set up, it looks like the 3rd line is just run from the intake tube to the catch can and the second intake breather connects to the oil cap supplied.

 

Why couldn't you run a single valve to cover your PCV to Intake, Buy a hose and run it from valve cover breather to valve cover breather (like they do with a dual) and then cap off your intake holes (I have a MIT tube)?

UPRPRODUCTS New Member

UPRPRODUCTS

Posted
Posted

The reason there is a hose connected to the intake tube is to allow clean filtered air to enter the crank case under normal driving conditions while intake manifold vacuum pulls air through the catch can and therefore the PCV.   Under WOT, there is very little intake manifold vacuum, so with a dual valve kit, the WOT hose uses the high velocity air moving through the intake tube to continue crank case evac.  

 

When there is excess crank case pressure, the air will move out of the clean side and can deposit oil into the intake tube.  This is where the Clean Side Separator is used on the kits to separate the oil mist. 

 

Not all trucks will have much oil come out of the clean side, it all depends on what kind of load it sees.  If your truck is a daily, and you pull the hose that runs form your valve cover to the air intake tube, there may not be any visible oil at all.  If you regularly tow or work the truck or if it is turbocharged, or supercharged , there may be oil dripping from the hose.

 

Basically, if the truck is a pretty stock daily and doesn't see much loading, a single valve catch can will do the job.  If it is driven hard, tows, or has forced induction, a dual valve would be better.

 

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