Black Market Race Catch Can

[M340Manny]

I was planning on running the check valves with the BMR kit. Waiting on delivery.

If Possible let me know how it goes, I'm looking into the same setup. Also will you be running the CCV line to the catch can or plug it?

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[SooopraSD]

Anyone Try the Ross Racing Check valve style head port plugs with this catch can

Not Ross Racing but I’m running the Vader Solutions pins with the BMR can. No issues.

 

[MidnightJZ]

If Possible let me know how it goes, I'm looking into the same setup. Also will you be running the CCV line to the catch can or plug it?

I was told from a shop to not use the BMR CCV line since it doesn't have a check valve. Only thing that I have to figure out is how I will T for vacuum. I have a CSF manifold that has the vacuum port to tap into but unsure yet where the vacuum line would go on the BMR catch can. The diagram on their website didn't show an outlet or designated spot.

 

[M340Manny]

Could I possibly add a check valve to the CCV line and leave it hooked up?

 

[Hot saws]

So I can’t help but think that block off pins or check valves do anything at all besides redirect the problem. That is to say divert the crankcase pressure away from potentially damaging the valve cover/integrated PCV system.

Still need somewhere for that crankcase pressure to go, which the obvious solution (in my mind) would be to just place a breather, ideally with an outlet only check valve, on the oil cap. That should be sufficient to divert the excess pressure.

On that line of thought, would a oil breather cap alone be enough of a diversion to prevent excess pressure from building up in the valve cover WITHOUT block off pins or check valves?

 

[Hot saws]

In terms of the CCV line on the low side, as others have said, this is merely a “fresh air” line. When the factory PCV system is functioning, it essentially serves as an air source (think shotgunning a beer).

Would recommend wither using OEM line with check valve and if no provision for that with aftermarket turbo inlet, then it should be plugged. I would not vent this port to atmosphere.

 

[Hot saws]

Sorry for run-on. I bought Ross racing check valves trying to be proactive (installing LPFP and port injection to up boost on my DAW ultra flow r) but as I’m thinking about it, it seems these things solve a problem and simultaneously create another. And the solution to the subsequent problem would be the same solution to the initial problem, if that makes sense.

 

[Hot saws]

I guess I’m just gonna buy a catch can and vent the oil breather and high-side PCV port, but I can’t really believe that the block off pins/check valves are really needed.

Where does the source of vacuum for the check valves, if you’re using those, come from if you’re venting the high side port to atmosphere? Simultaneously, if you’re using block off pins, why would you not just plug the high side port (since it can’t be used at all).

I have to be wrong about the flow of air here.
Does anyone have a good diagram about how the stock PCV system flows?

 

[Hot saws]

Never mind, so the head ports themselves are the source of the vacuum as they are right over the intake valves, and under idle/part throttle act as vacuum source but obviously are pressurized under boost. Makes sense to block these off under high boost applications since clearly the factory valve cover/integrated PCV was not designed for boost pressures we see in aftermarket world.

I was under the assumption that the head ports were coming from crankcase, and vacuum source was turbo inlet. I do think that the turbo inlet still acts as a source of vacuum, probably more so under boost, to help evacuate crankcase.

 

[req]

What black market race says makes no sense. You block off the engines way of getting vacuum and the you vent to atmosphere the only way of getting a vacuum. That's why alot of you guys are getting smoke. There's no vacuum since you all have vta catch cans. If you block them off you'll need a catch can that will go back into the intake to keep vacumm.

 

[mk5.habibi]

Hey guys. I have a pure 800 setup on my 2020 and I was smoking randomly on decl. So I got the bmr kit and I did all 3. Ccv pcv and oil cap. But I really don’t wanna do head studs or check valves in the head ngl. Is there anything else I can do?

 

[req]

Hey guys. I have a pure 800 setup on my 2020 and I was smoking randomly on decl. So I got the bmr kit and I did all 3. Ccv pcv and oil cap. But I really don’t wanna do head studs or check valves in the head ngl. Is there anything else I can do?

you can put the stock pcv system back on for a day, do a pull and see if you get any smoke coming out

 

[Supraman40]

Hey guys. I have a pure 800 setup on my 2020 and I was smoking randomly on decl. So I got the bmr kit and I did all 3. Ccv pcv and oil cap. But I really don’t wanna do head studs or check valves in the head ngl. Is there anything else I can do?

BMR changes the CCV to an open port, the OEM setup puts a one way check valve going into the engine. I think BMRs setup with the CCV being an open line is not right.

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