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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


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Old 10-06-2017, 11:11 PM   #1
q335r49
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Which Catch Can to use for Superchargers?

Installing a supercharger soon! From what I understand, with SC, the two openings of a unidirectional PCV system both become output valves, with the PCV being replaced by a one way check valve so air doesnt get in. It would seem that, by this reasoning, you'd need catch cans at both ends.

How many do you guys use? If one, which port is best to put the can in? SavageGeese uses only one (at the PCV valve end) but doesnt really give an explanation... it would seem that the always open exhaust end would be in need of it more?
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Old 10-07-2017, 02:31 AM   #2
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Velox/verus AOS is what I have. Love it. It's a dual can in one setup and I have mine setup to drain back into my engine.

I have mine setup in NA with the stock pcv valve, I believe some people here have it setup in FI as well. Check the thread for the product
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Old 10-07-2017, 07:06 AM   #3
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Radium PCV or dual
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Old 10-08-2017, 02:56 AM   #4
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This ^^^
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Old 10-08-2017, 06:52 AM   #5
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Quote:
Originally Posted by q335r49 View Post
Installing a supercharger soon! From what I understand, with SC, the two openings of a unidirectional PCV system both become output valves, with the PCV being replaced by a one way check valve so air doesnt get in. It would seem that, by this reasoning, you'd need catch cans at both ends.

How many do you guys use? If one, which port is best to put the can in? SavageGeese uses only one (at the PCV valve end) but doesnt really give an explanation... it would seem that the always open exhaust end would be in need of it more?
With the JRSC kit the stock PCV valve is left as it is on the engine block and a check-valve is installed on the intake end of the PCV hose. Both valves stop air flow in the same direction, so the check valve helps the stock PCV valve. Recently, I have replaced that plastic check valve with STI PCV valve since the plastic check valve was soaked with oil and leaking boost. I have installed the STI PCV valve on the hose instead of replacing the stock PCV valve. It now works in place of the check valve; it has the same functionality anyway. I just inserted the threaded end into the silicon hose and tightened with a clamp; no leaks. And to avoid oil blow back in the future, I have installed a Cusco oil catch can (965 009 A) on the PCV line.
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Old 10-09-2017, 09:55 AM   #6
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With the JRSC kit the stock PCV valve is left as it is on the engine block and a check-valve is installed on the intake end of the PCV hose. Both valves stop air flow in the same direction, so the check valve helps the stock PCV valve. Recently, I have replaced that plastic check valve with STI PCV valve since the plastic check valve was soaked with oil and leaking boost. I have installed the STI PCV valve on the hose instead of replacing the stock PCV valve. It now works in place of the check valve; it has the same functionality anyway. I just inserted the threaded end into the silicon hose and tightened with a clamp; no leaks. And to avoid oil blow back in the future, I have installed a Cusco oil catch can (965 009 A) on the PCV line.
So are you running the sti pcv along side the stock pcv, or just the sti pcv? Planning on running a JSRC in the future and didn't want to spend too much time rerouting my AOS hoses. From what it sounds like, JSRC keeps the stock vaccum routing but adds an extra check valve
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Old 10-09-2017, 11:02 AM   #7
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So are you running the sti pcv along side the stock pcv, or just the sti pcv? Planning on running a JSRC in the future and didn't want to spend too much time rerouting my AOS hoses. From what it sounds like, JSRC keeps the stock vaccum routing but adds an extra check valve
Yes JRSC keeps the stock PCV valve but adds an extra check valve. I am still using this same configuration. There is a catch can now between the check valve and PCV valve. And the leaking check valve is replaced with the STI valve on the intake manifold side blocking air going back into catch can. There is no use left for the stock PCV valve on the crankcase side of the catch can but it is still there.
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Old 10-09-2017, 12:54 PM   #8
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Yes JRSC keeps the stock PCV valve but adds an extra check valve. I am still using this same configuration. There is a catch can now between the check valve and PCV valve. And the leaking check valve is replaced with the STI valve on the intake manifold side blocking air going back into catch can. There is no use left for the stock PCV valve on the crankcase side of the catch can but it is still there.
Nice! I was worried about have to reroute my Velox AOS to the FI config, but if I just need to add an extra valve to the NA config it'll be easy peasy
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Old 03-28-2019, 02:51 PM   #9
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Someone willing to draw a diagram?
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Old 03-28-2019, 03:55 PM   #10
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I have the Verus AOS with my SC. I have a youtube video up. No edits, just running clip of me blabbering

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Old 03-29-2019, 02:06 AM   #11
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You require a "good" AOS

Plus you really want a return if possible.

Look at what is required IRT AOS, base your purchase on sound engineering, not a shiny brand name.

90% of catch cans are rubbish.
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Old 03-29-2019, 07:41 AM   #12
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Not shiny, no flashy name brand, not expensive, the difference is engineering, oh, and it actually works.

Servicing takes 1 minute.

https://www.autopartssupply.com.au/m...waAlFWEALw_wcB

You can drain back, or catch.

IMO it's the best functioning AOS in the market and punches well above it's price range.

Or you could buy something shiny with a brand name that doesn't work as well for more money.
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