JohnC

Let's discuss PCV system on Boosted cars...

40 posts in this topic

1 hour ago, Ashley P said:

True.  How's yours vented to atmospheric?

Mine is supercharged from the factory and the it goes: Air intake tube>both valve covers/crankcase/valley cover >supercharger snout.  The suction side is pre supercharger, but post throttle body.  I put a catch can in the valley cover to supercharger snout line.  But lots of people don’t bother.  It just keeps the intercooler brick cleaner.

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Well I was short on time and and the instructions were for the LS2 on one page and the LSA (ZL1) on the other.

It’s ghetto, but I kept the Mishimoto can between the intake valley cover and intake behind TB and zip ties it down to the MM Barack as a temp fix.

The MM is on the oil fil cap and blower air filter vacuum line.

Don’t laugh...

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Blowby is not the biggest problem if there’s no check valve between the intake and crank case.

Guess I’ll stop by so we can stick the check valve in there then...

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66sprint6 likes this

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I hooked it up wrong then....

The blue line is getting suction from the blower pcv to air filter.

The other is hooked to the valve cover oil fill cap.

The Mishimoto is hooked between the valet pcv and intake behind tb.

Make sense?

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3 hours ago, Mike said:

I guess have to see how it’s hooked up in person.

 

The blue line will have boost on it on your car.

From the way it's labeled, the blue line has vacuum (suction), not boost (pressure) on the LSA Wild diagram. :shrug: 

I'll say this...

I gave it a few hard hit and didn't blow oil out everywhere like before this setup. :up: 

Tino likes this

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6 hours ago, JohnC said:

From the way it's labeled, the blue line has vacuum (suction), not boost (pressure) on the LSA Wild diagram. :shrug: 

I'll say this...

I gave it a few hard hit and didn't blow oil out everywhere like before this setup. :up: 

The LSA has the supercharger after where that blue line hooks to it.

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You basically don't want any line hooked up to the intake after the S/C. If one is, then it needs to have a check valve in place to prevent positive pressure from coming out of that line. If you have something hooked up to the port after the TB, then it's getting boost pressure and needs a check valve, or leave it plugged off until you get one.

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Here is what MM guy said:

Quote

Put my cans pcv valve to the intake manifold, cap off the stock driver barb, and connect either the passenger barb or the valley plate to the procharger filter (cap the one you do not use) and that is all. if you want to see if there is anything on the procharger side, you can put the mishimoto can in line here, but is very unlikely it will be needed.

 

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Crazy but the way it’s setup now is keeping it from blowing oil out because it hasn’t done it since I put the MM can on.

I’ll still redo it the correct way though....

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