Cusco catch can install diagram

[wbradley]

I know this looks like the writings of a mad man but a member asked for clarification on hookups.

[JPxM0Dz]

Here are a couple more ways I have seen this installed...

[wbradley]

^^ I wish you hadn't posted this confusing mess^^

That first pic shows the catch can between the front crankcase vent to the intake, which is a relatively insignificant blow-by gas source (as low as 10% of total blow-by) compared to the PCV valve. I have researched the purpose of the catch can thoroughly.

The second pic vents the same front crankcase outlet to the atmosphere, thereby eliminating the closed system, fouling emissions etc..

Neither of these configurations are intercepting the blow-by from the PCV, the main source. So much misinformation out there.

[JPxM0Dz]

Originally Posted by wbradley

^^ I wish you hadn't posted this. The first pic shows PCV to intake before throttle body which is a questionable route considering the PCV to intake manifold inlet then needs to be plugged. Direct to where the PCV normally vents makes more sense.

Your second pic is going from the front crankcase vent to the atmosphere, not the intended use when you want to vent the PCV. Not good for the environment either.

The first pic was taken by a member that had to go this configuration to be track legal

The second pic was taken by a Subaru tech from another forum

Not my pics, eveyone seems to have their own opinions to how this should be installed, none of which are mine...

Another opinion that has yet to be mentioned, states that the Cusco oil catch can is useless in it's design period, again not my opinion

[wbradley]

Originally Posted by JPxM0Dz

The first pic was posted by a member that had to go this configuration to be track legal

The second pic was taken by a Subaru tech from another forum

Not pics, eveyone seems to have their own opions to how this should be installed, none of which are mine...

I keep asking for opinions of the real mechanics out here but nobody replies. So, did all the research I could online and I'm pretty sure the can goes between the PCV and the intake manifold on this car. See the Radium can install DIY as well.

[JPxM0Dz]

Originally Posted by wbradley

I keep asking for opinions of the real mechanics out here but nobody replies. So, did all the research I could online and I'm pretty sure the can goes between the PCV and the intake manifold on this car. See the Radium can install DIY as well.

Yeah, opinions will vary, depending on who you talk to as mentioned above

If you get a chance, please post a pic of your catch can installed

Thanks

[J-Money]

Is there any vibrations from the catch can? is it silent at all and would you recomand it?

[JPxM0Dz]

Originally Posted by J-Money

Is there any vibrations from the catch can? is it silent at all and would you recomand it?

The catch can install is very solid! It secures very nicely as seen in this pic

No noise or vibration from mine whatsoever

[wbradley]

Originally Posted by J-Money

Is there any vibrations from the catch can? is it silent at all and would you recomand it?

No noise from the can. Nice bling with the Cusco unit, butcan't confirm effectiveness until spring when the car comes out of the garage.

[wbradley]

Here are some pics as requested:

The can



Driver's side



Passenger side



Hope that helps!

[20valvewynn83]

Question for you guys. Does this car have two PCV valves? Do you guys know what the functionality of the PCV is for?

FYI: I know the answer just want to see if you guys know

[JPxM0Dz]

Originally Posted by 20valvewynn83

Question for you guys. Does this car have two PCV valves? Do you guys know what the functionality of the PCV is for?

FYI: I know the answer just want to see if you guys know

Actually I don't! At least not without googling it

I would love to hear an explanation and your thoughts on this

[20valvewynn83]

Originally Posted by JPxM0Dz

Actually I don't! At least not without googling it

I would love to hear an explanation and your thoughts on this

The PCV is used to collect unused gas vapors that did not get burned in combustion. The vapors collect in the crank casing and do nothing so the PCV valve pulls a vacuum to remove the vapors to send it back into the combustion chamber to be burned. So if you just connect the catch can to the PCV's and not the to the intake then you will have no vacuum to pull the vapors out and the can is pointless.

[wbradley]

Originally Posted by 20valvewynn83

Question for you guys. Does this car have two PCV valves? Do you guys know what the functionality of the PCV is for?

FYI: I know the answer just want to see if you guys know

This car has one PCV valve.

It's primary function is recirculate or otherwise relieve the pressure buildup that can occur in the crankcase. Suspended oil particulate as well as fuel and water vapor can be extracted from the blow-by using a catch can. Normally blow-by is piped back to the intake to be burned off but the catch can with a proper baffle should be able to extract much of this material from the air so the intake has minimal oil exposure and maintains a cleaner condition.

How's that?