That is the correct way to connect a non vented can. Both of those other ports are to allow gasses to escape the valve cover. For a non-vented can, you are simply placing a separator (catch can) in the PCV loop.Intake provides vacuum which pulls in the the gases the PCV valve vents, so they are then pulled back into the motor and re-burned. The catch can is just capturing more of the oil vapor so you are not re-burning it and causing a smoke screen behind you on the track (catch cans are all but worthless and a waste on a street only car by the way).

If you connect this style (non vented) can to both of the valve cover ports, then you have the same pressure vented from the valve cover at both ports and the can will effectively do nothing. You also most likely are then effectively plugging up the PCV system so it is not doing its job.

On vented cans that connect to both valve cover ports, the positive pressure in the crank case is then vented to the can and then the atmosphere instead of going back into the intake and being burned. So you are effectively then just just venting the crank case pressure to the atmosphere and catching the oil in the can vs drawing the fumes back into the intake so they are burned in combustion.

 

Another way some have done it is to run both valve cover vent lines into a "T" fitting and run that combined line to the catch can. Then run the intake port to the other side of the can so you are catching oil from both vents. However, on this car I think almost all of the oil is coming from the PCV valve itself vs the other vent. But the point is you need a lower pressure in the catch can than in the crank case, so you are still venting. So that is either atmosphere (aka vented can) or intake vacuum (closed can)

 

Gotya! Thats what I thought from my research. I got the vented can and am hooking up both valve cover ports so It catches oil and vents to the atmosphere. Which won't matter because Ohio doesn't have emissions. Thanks!

 

Radium 00-05 dual setup (to keep my cruise). Both cans are vented. I'm not particularly happy with the hoses, so I'll be redoing them now that I got a much nicer VC on the way.

 

Here's my basic catch can setup, does the job and no more dipstick issues
Catch can $60
Hoses, fittings and bracket was about 45 bucks

 

 

Super clean.. GPW

 

thanks brother