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Old Oct 10, 2018 | 11:54 AM
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Default Mighty mouse catch can

So after talking to them and explaining I had to much crank case pressure and I needed to vent it and asking if the race can was the right one I ordered the race can. Now Dave say it's the wrong one and I need the PCV can. What is the difference between the two cans? Now mind you I think he needs to have a phone number to call bc trying to resolve issues through FB msg or email is annoying as all hell.
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Old Oct 10, 2018 | 12:05 PM
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Id like to know as well, I have quite of bit crank case pressure so id need a vented setup too.
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Old Oct 10, 2018 | 12:08 PM
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Are you boosted?
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Old Oct 10, 2018 | 12:18 PM
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Originally Posted by Ant-Man
Are you boosted?
Yes i am on a 2200 with 16lb of boost
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Old Oct 10, 2018 | 12:24 PM
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Yep, you need the PCV.

Race - Just catches oil and vents to atmosphere.
Draft - Collects oil and vents it back into the blower/turbo inlet
PCV - Vacuums the crankcase when not boost, when in boost the check valve doesn't allow boost into the can resulting in boost loss/pressurized crankcase.. and the breather has a giant check ball on it to vent when not under vacuum.
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Old Oct 10, 2018 | 12:25 PM
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Originally Posted by Ant-Man
Yep, you need the PCV.

Race - Just catches oil and vents to atmosphere.
Draft - Collects oil and vents it back into the blower/turbo inlet
PCV - Vacuums the crankcase when not boost, when in boost the check valve doesn't allow boost into the can resulting in boost loss/pressurized crankcase.. and the breather has a giant check ball on it to vent when not under vacuum.
so basically he told me to buy the wrong one/.awesome, and whats better i cant get ahold of him to resolve it.. bc no phone

Last edited by UmX; Oct 10, 2018 at 12:26 PM.
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Old Oct 10, 2018 | 12:33 PM
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Bc right now with the race can i have it set up as. the wild diagram.. So from air filter to driver valve cover, pass valve cover to can and out to intake which i guess is wrong with this can. Is there anyways to make this race can work to vent the crank case?


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Old Oct 10, 2018 | 12:57 PM
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Not if you have the race can.. you're missing two things: the ball valve on the breather and the check valve between the intake and can. It would be best for you to return the can and order the right one.

I 'ported' a $20 ebay can and made the breather valve from a 20mm medical mask valve, and used a 10mm check valve in between the intake and can.. works great. Sucks hard and vents under boost with no leaks.
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Old Oct 10, 2018 | 02:03 PM
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Its funny the things that seem like they'd be the simplest turn out to be a pain. Ive been breaking my head over this for the last few weeks trying to figure out how to route my setup since im boosted. Seems like MM is the way to go with the check valve on the filter. Unfortunately I have a non-vented can and a breather for the valve covers, so I needed to figure out an alternative way to do this. 2 things I know for sure are 1. you need a check valve if youre boosted and 2. You need to vent the excess pressure at some point to not over-pressurize your crankcase. Seems like 'there is more than one way to skin the cat' on this, but some ways work better at evacuating boost from the case than others.
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Old Oct 10, 2018 | 02:07 PM
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I talked to Dave was some miscommunication. So new can is coming just gotta send the wrong one baxk
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Old Oct 10, 2018 | 02:20 PM
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Originally Posted by GaragedLS2
Its funny the things that seem like they'd be the simplest turn out to be a pain. Ive been breaking my head over this for the last few weeks trying to figure out how to route my setup since im boosted. Seems like MM is the way to go with the check valve on the filter. Unfortunately I have a non-vented can and a breather for the valve covers, so I needed to figure out an alternative way to do this. 2 things I know for sure are 1. you need a check valve if youre boosted and 2. You need to vent the excess pressure at some point to not over-pressurize your crankcase. Seems like 'there is more than one way to skin the cat' on this, but some ways work better at evacuating boost from the case than others.
There's really one 1 good way if you're boosted..
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Old Oct 10, 2018 | 05:04 PM
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There may be a best way but I see people run it a couple different ways with success. Not sure people are taking the time to measure crankcase pressure and do all the testing, though, so who knows how much more effective one way is over another. Ive seen people pull from the valley cover with success although MM says its not big enough of a pull. I suppose a lot of it will depend on how you use the car, too.
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Old Oct 10, 2018 | 05:06 PM
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Originally Posted by UmX
I talked to Dave was some miscommunication. So new can is coming just gotta send the wrong one baxk

Seems like that's the kind of guy he is. Glad you got it worked out.
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Old Oct 10, 2018 | 05:20 PM
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Should measure the pressure on a boosted setup to be sure all is good. No pressure build at 20psi on my car using MM setup.
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Old Oct 10, 2018 | 05:35 PM
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Originally Posted by realcanuk
Should measure the pressure on a boosted setup to be sure all is good. No pressure build at 20psi on my car using MM setup.
Is there a guide line on what is good and what isnt?
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Old Oct 10, 2018 | 05:45 PM
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Originally Posted by g23crawler
Is there a guide line on what is good and what isnt?
I'm not really sure but I the pressure didn't increase at all during a dyno pull.
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Old Oct 11, 2018 | 10:04 PM
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Anything positive is bad. Crank case should not be seeing positive pressure.
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Old Oct 11, 2018 | 10:09 PM
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Originally Posted by Unreal
Anything positive is bad. Crank case should not be seeing positive pressure.
That's what I figured but wasn't sure if a little was a big deal so didn't want to give any wrong info. Mine is 0 and stays there.
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Old Oct 16, 2018 | 06:17 PM
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How do you measure crank case pressure?
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Old Oct 16, 2018 | 06:40 PM
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Originally Posted by camarokidz28
How do you measure crank case pressure?
vacuum pressure gauge..
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