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Intake Manifold Egr Top Port

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Old Jun 22, 2018, 02:34 PM
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Intake Manifold Egr Top Port

I have this port capped, but wondering if I can use it for a oil catch can connected to the valve cover rather than capping it off

​​or maybe for a boost gauge

Old Jun 22, 2018, 04:05 PM
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You can use that for any boost/vacuum source really. It's literally a hole into the intake manifold. I don't suggest using it as a catch can source though because if any crap comes out of the catch can, it will be more inclined to go into cylinders 3 and 4. There is a side vacuum source for your catch can needs with smaller openings into the manifold. That source get's vacuum at the beginning of the runners. This will hopefully distribute any residual catch can vapor to all 4 cylinders (if you care about that sorta thing).

Last edited by Pal215; Jun 22, 2018 at 10:26 PM.
Old Jun 22, 2018, 05:57 PM
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Originally Posted by Pal215
You can use that for any boost/vacuum source really. It's literally a hole into the intake manifold. I don't suggest using it as a catch can source thought because if any crap comes out of the catch can, it will be more inclined to go into cylinders 3 and 4. There is a side vacuum source for your catch can needs with smaller openings into the manifold. That source get's vacuum at the beginning of the runners. This will hopefully distribute any residual catch can vapor to all 4 cylinders (if you care about that sorta thing).
awesome, I just bought a catch can so im looking for another port besides the valve cover, but ill use that for my boost gauge and just change the barb
Old Jun 23, 2018, 06:55 AM
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connecting a catch can to your intake = vacuum leak (or boost leak)
Don't do that!
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Old Jun 23, 2018, 10:22 AM
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Originally Posted by hutch959
connecting a catch can to your intake = vacuum leak (or boost leak)
Don't do that!
He will need a good check valve and clamps to prevent boost leak (and connect it the correctly).
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