Valve Cover PCV Fittings

[Bmwfixerguy1]

With a standard check valve you are applying full plenum vacuum to the crankcase which is not good idea. You need a PCV Valve if you are going to use your plenum as a vacuum reference, they are specifically calibrated to limit flow through the valve at high vacuums (ie. decel, idle, etc).

Then deleting the flapper means you have reduced the level of vacuum on the crankcase (as you eliminated the restriction which elevates the vacuum in small PCV flow scenarios) but this isn't a good thing. Basically what you have going on is a big unneeded vacuum leak at this moment, and an overwhelming amount of airflow going through your crankcase under low load conditions.

Also this would not show on WGDC as WGDC represents BOOST, and when in BOOST these valves close (thus seal themselves from any functionality) as the system is operating in HIGH load (ie. forced ventilation out of flapper port only).

Rob

When I originally asked if this way was gonna work I was given the green light by a bunch of others that my plot was perfect. I'm finding out now it's much less than perfect lol..

I think it would be much better off with way smaller line on the vacuum side. For now I'm gonna add a restriction at the catch can. I have a piece of hose that fits into one of the male orb fittings then can't get pulled out from the push Lok fitting over it.

It's way less than perfect and I'll adapt it as time goes on..

Thanks for the input it's appreciated

What would be a good inline check valve to use in my situation?

 

[Rob@RBTurbo]

When I originally asked if this way was gonna work I was given the green light by a bunch of others that my plot was perfect. I'm finding out now it's much less than perfect lol..

I think it would be much better off with way smaller line on the vacuum side. For now I'm gonna add a restriction at the catch can. I have a piece of hose that fits into one of the male orb fittings then can't get pulled out from the push Lok fitting over it.

It's way less than perfect and I'll adapt it as time goes on..

Thanks for the input it's appreciated

What would be a good inline check valve to use in my situation?

After tons of discussions and many many years and until this very day in this platform we've only encountered a few who really understand this topic.

In your situation you decided that deleting the PCV was your thing. This means you will run these fittings to a catch can, if you wish, then attach them to a breather of sorts so the crankcase can forcefully ventilate itself to atmosphere. Voila the PCV is then deleted!

OR if you REALLY want to get crafty and dump some good money and time into it in the process, you can look into developing and calibrating a crank vac setup too- which is the only way to get vacuum on the crankcase while in high load.

Rob

 

[Erichale77]

I don't know why you just don't get the RB external PCV kit with dual occ's and call it a day.

 

[Bmwfixerguy1]

I don't know why you just don't get the RB external PCV kit with dual occ's and call it a day.

That was absolutely a consideration and may be the end result.

I did it like this kinda for the reason he stated above which is actually understanding the system a little better. It wasn't price because I know I spent more, I wanted to do it and so far it's worked pretty damn well once I got rid of the flapper. I'm considering some smaller line on the vacuum vaide because my choice was exces

 

[Erichale77]

Have you read through this?
http://www.n54tech.com/forums/showthread.php?t=35535

 

[dyezak]

Have you read through this?
http://www.n54tech.com/forums/showthread.php?t=35535

That's what I run on my car (thanks @Rob@RBTurbo) and have 0 issues with it.

 

[Bmwfixerguy1]

Have you read through this?
http://www.n54tech.com/forums/showthread.php?t=35535

I believe I have I'll read it again though. I think I read just about anything Google would find before I jumped in lol

 

[Bmwfixerguy1]

Have you read through this?
http://www.n54tech.com/forums/showthread.php?t=35535

I say it works good but by that I mean it's catching oil krud, drivability is great and no abnormalities.. I have yet to check exact CC vacuum and pressure under boost and vacuum/cruising.

Bit it's why it's all about. Not doing or saying this is superior that's why I did it.. it's far from right now.. just wanted to learn it a little better.

We currently have a lot of faults we are dealing with at work that are CC related, BMW na actually just released a spread sheet of every engine and it's ideal CC vacuum. This is very much appreciated a learning experience with something that has been a less than completely understood topic

 

[Erichale77]

No problem. I think engine mods have a great deal to with what kind of pcv set up one would need. How much power you're making and how you drive the car makes a difference too. I run the RB external delete with two Mishimotto cans along with a Mocal scavenge pump but I have a huge build.

 

[Tony@VargasTurboTech]

I don't know why you just don't get the RB external PCV kit with dual occ's and call it a day.

Most likely because the RB kit is less than ideal, and a better set up can be made quite easily. For the people looking to regulate closely the amount of vacuum in your system, a fitting such as this is an easy way to do it.

https://www.summitracing.com/parts/...MIsaGo5ZTW1wIVhVx-Ch0L6A7REAQYBCABEgJgyvD_BwE

 

[Bmwfixerguy1]

Most likely because the RB kit is less than ideal, and a better set up can be made quite easily. For the people looking to regulate closely the amount of vacuum in your system, a fitting such as this is an easy way to do it.

https://www.summitracing.com/parts/...MIsaGo5ZTW1wIVhVx-Ch0L6A7REAQYBCABEgJgyvD_BwE

I've never seen one of those.. how exactly does that get used in the system?

 

[Rob@RBTurbo]

Slightly varying perspectives over at VTT... cool Thanksgiving FUD.

Most likely because the RB kit is less than ideal, and a better set up can be made quite easily. For the people looking to regulate closely the amount of vacuum in your system, a fitting such as this is an easy way to do it.
https://www.summitracing.com/parts/...MIsaGo5ZTW1wIVhVx-Ch0L6A7REAQYBCABEgJgyvD_BwE

RB is a competitor, but he probably has the best total PCV system on the market right now. It's what I'd recommend you look at.
Chris

http://www.e90post.com/forums/showpost.php?p=22339272&postcount=12

We'd suggest those interested do some research on flow patterns of PCV Valves, they are not static in nature thus the part listed above will not achieve the same OEM functionality nor better any portion of its' low load design.

 

[Tony@VargasTurboTech]

I've never seen one of those.. how exactly does that get used in the system?

It depends, I have full vacuum going to my can to pull from the motor at idle. You do not want full vacuum going to the motor, you can install this in the cam, and it will bleed off a desired amount of vacuum to keep the amount of vacuum in the system where you want it

 

[Bmwfixerguy1]

It depends, I have full vacuum going to my can to pull from the motor at idle. You do not want full vacuum going to the motor, you can install this in the cam, and it will bleed off a desired amount of vacuum to keep the amount of vacuum in the system where you want it

Aha so it's a regulated leak! You could throw a gauge on the CC and literally dial it in to perfect at warm idle!

 

[Tony@VargasTurboTech]

Exactly

 

[Anthony@ACF]

Still have lots of these in stock, have dozens of these shipped to customers all over the world. I will be releasing a catch can to go with it with lines so it is a complete plug and play solution. Expect a price point of around $375 for a complete kit.

Also finally got a domain for my website so it is easier to find, will be adding more products this week, so keep your eye on the website. Acfabrication.net

 

[Jeffman]

Still have lots of these in stock, have dozens of these shipped to customers all over the world. I will be releasing a catch can to go with it with lines so it is a complete plug and play solution. Expect a price point of around $375 for a complete kit.

Also finally got a domain for my website so it is easier to find, will be adding more products this week, so keep your eye on the website. Acfabrication.net

@Anthony@ACF Is it correct that one needs to tap and plug the head ports to properly use these connections?

 

[BOosted 335i]

It depends, I have full vacuum going to my can to pull from the motor at idle. You do not want full vacuum going to the motor, you can install this in the cam, and it will bleed off a desired amount of vacuum to keep the amount of vacuum in the system where you want it

So what would be recommended vacuum on our n54 cars?cold and warmed up?is there a range?think I read 11hg cold and 20hg warmed up but that was from a post few yrs back somewhere I read.

 

[DennisKing]

I ordered one of these about 6 weeks ago and haven't seen it. PM'd and emailed. No response. Does anyone know if he's still making these parts? I was able process the sale on his website so I'd assume so but you never know. Hope he's okay.

 

[pdxbimmertech]

Damn this is lame. Been ready to order one of these fittings but haven't pulled the trigger yet and now I'm glad I didn't yet.
Getting ready to go to external PCV on mine as well.