Zo6 vent under intake
05-22-2018, 12:27 PM
#21
Supporting Vendor
That path works for naturally aspirated setups (and it what I'll be doing in my C5), but what should the flow path be when the intake manifold pressure is higher than ambient pressure? I can't imagine a good solution for that without some complexity. But the problem might just be my imagination. 
i have added a slash to show the boost being blocked from entering the catch can. this is built into my 'wild' systems.
some cool video demos here: (acid tests and catch can challenges)
https://www.mightymousesolutions.com/videos
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Six time NMCA True Street Champions
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3470# Stock bottom end and heads Corvette Stock Bottom End Record Holder
Solutions for the common gearhead #made in USA
mightymousesolutions.com
facebok.com/mightymousesolutions
#mmsolutions
Six time NMCA True Street Champions
Home of the first Twin Turbo C7Z 7.81 @ 176
3470# Stock bottom end and heads Corvette Stock Bottom End Record Holder
05-22-2018, 10:55 PM
#22
If you're in boost, and the one-way valve on the intake manifold closes, then what's pulling air through the other components?
That sounds flow through the catch can stops (because the output port is now closed by the check-valve) and crankcase pressure has no place to go but out - through what used to be the clean-air inlet.
That sounds flow through the catch can stops (because the output port is now closed by the check-valve) and crankcase pressure has no place to go but out - through what used to be the clean-air inlet.
05-23-2018, 09:37 AM
#23
Supporting Vendor
as i mentioned before, for street drivers this scenario happens a fraction of a percent of the time, so its role in crankcase filtration gets superseded by the need to maintain stable (0) pressure build up.
in stock form this means everything must turn around and leave the fresh air inlet
for my cans, especially for my wild systems, there is a new much larger vent available on the can which significantly increase ventilation capacity (and power handling).
in stock form this means everything must turn around and leave the fresh air inlet
for my cans, especially for my wild systems, there is a new much larger vent available on the can which significantly increase ventilation capacity (and power handling).
05-23-2018, 10:39 PM
#24
I see now... Subaru doesn't have the vent-to-atmosphere option so that's where the extra complexity comes from. Not a concern for most of the people buying catch cans though.
Is there something in the catch can to stop it from pulling in fresh air via the can's vent when the intake manifold is in vacuum?
Is there something in the catch can to stop it from pulling in fresh air via the can's vent when the intake manifold is in vacuum?
05-23-2018, 10:54 PM
#25
Supporting Vendor
I see now... Subaru doesn't have the vent-to-atmosphere option so that's where the extra complexity comes from. Not a concern for most of the people buying catch cans though.
Is there something in the catch can to stop it from pulling in fresh air via the can's vent when the intake manifold is in vacuum?
Is there something in the catch can to stop it from pulling in fresh air via the can's vent when the intake manifold is in vacuum?
when it comes to power adders the stock system often does not cut it, so that's where what i do becomes important. yes the breather closes in vac