4396 replies to this topic

[CHILL Gone DUTCH]

Air should go into the cam cover via the breather hose, the inlet manifold creates the vacuum, too much vacuum or too much pressure from the supercharger alters the PCV and thus the problems occur

Once the Pcv valve gets more pressure in the inlet manifold compared with engine side of my the Pcv valve it closes which is very quickly on our boosted engines

[vocky]

blank off the inlet manifold vacuum port and fit a one way valve with pressure control into the cam cover, just drill and fit a fitting into the cam cover and the other end would need to go to a vacuum port.

I have done something similar on mine to reconnect the PCV

Edited by vocky, 02 January 2015 - 07:04 PM.

[CHILL Gone DUTCH]

At the moment on my car I just vent the crank case + cam breathers via 1" tubes to under the engine with a gauze filter on the end of each. As a result there is a quite a lot of oil loss like this due to lack of condensation. I probably lose a cupful of oil like this every 100 miles. Also, this means the area near the gauze filters (the wishbones) are covered in oily muck - good for keeping rust away though ! LOL

This seems to be happening to me since going higher than stage 2 SC So I put it in to the inlet manifold and the car uses a lot less oil But the trade of is the laminovas throttle body and supercharger gets oily Which dosent help with cc

[CHILL Gone DUTCH]

blank off the inlet manifold vacuum port and fit a one way valve with pressure control into the cam cover, just drill and fit a fitting into the cam cover and the other end would need to go to a vacuum port. I have done something similar on mine to reconnect the PCV

Do you mean the orifice as CS do? If so this is basically like this all the time due to the boost from onlet manifold closing the Pcv valve in the inlet ??

[vocky]

blank the oriface.

 

Then control the amount of vacuum the PCV system has, with the adjuster. Having no vacuum is bad for the PCV, the pistons create air pressure and this needs to be kept under control.

Edited by vocky, 02 January 2015 - 07:11 PM.

[CHILL Gone DUTCH]

@ vocky

Couldn't we create this from the turbo oil return,



For pulling gasses out
And simply put a filter straight on cam cover to let air in

[CHILL Gone DUTCH]

This way it creates a open system rather than a troublesome sealed system

[CHILL Gone DUTCH]

Does anyone think this will work ??? Or have I lost the plot 😭😭🙀👴

Edited by CHILL Gone DUTCH, 02 January 2015 - 08:05 PM.

[ArticMonkey]

You lost me at orifice.

Edited by ArticMonkey, 02 January 2015 - 10:59 PM.

[FLD]

The exhaust systems do work but I've only seen them on pro-stocks etc. If you search 'oil separator' on ebay you'll find quite a few centrifugal ones that return oil to the sump and connect to the inlet. These should minimise fouling but htere's no reason you cant vent it to atmosphere via a filter.

[CHILL Gone DUTCH]

The exhaust systems do work but I've only seen them on pro-stocks etc. If you search 'oil separator' on ebay you'll find quite a few centrifugal ones that return oil to the sump and connect to the inlet. These should minimise fouling but htere's no reason you cant vent it to atmosphere via a filter.

Was going to vent cam cover to atmosphere for clean air and keep the separator ( spiral ) sealed to the exhaust setup What do you think this way the whole engine benefits from cooker cleaner air As for orifice it dosent really matter as once car is creating boost ( more pressure in the inlet manifold than the crank ) then it is closed anyway If I can get a bit of confidence on this I will be doing it

[Nev]

Venting PCV fumes back into the inlet is bad. This is because the fumes in the crank case are devoid of oxygen and because they are bloody hot, so by venting this gas back into the inlet track means that your cylinders will see lower oxygen content and higher inlet charge temps. This is not good for power at all and also will mean you could run rich.

 

In "old skool" cars, manufacturers always used to vent PCV to atmosphere. It is only the modern emissions laws that now force them to re-circulate any crank pressure. From that you can draw your own conclusion about what would be best.

 

Edited by Nev, 03 January 2015 - 11:56 AM.

[Arno]

The exhaust systems do work but I've only seen them on pro-stocks etc. If you search 'oil separator' on ebay you'll find quite a few centrifugal ones that return oil to the sump and connect to the inlet. These should minimise fouling but htere's no reason you cant vent it to atmosphere via a filter.

 

Eg. MANN Provent 200

 

 

http://www.inlinefil.../FMH-3931070550

 

Originally a truck/generator/agriculture product, but very popular on offroaders and many boosted setups.

 

Drain hose on these can/should be connected to the sump below the oil level (otherwise needs a 1-way valve) so any collected oil drains back into the engine sump.

 

Bye, Arno.

[siztenboots]

do you also struggle for brake servo vacuum?

 

iirc b207 has a cam driven vacuum pump?

[CHILL Gone DUTCH]

do you also struggle for brake servo vacuum?   iirc b207 has a cam driven vacuum pump?

No problem but I do use the cam driven b207 pump

[CHILL Gone DUTCH]

Venting PCV fumes back into the inlet is bad. This is because the fumes in the crank case are devoid of oxygen and because they are bloody hot, so by venting this gas back into the inlet track means that your cylinders will see lower oxygen content and higher inlet charge temps. This is not good for power at all and also will mean you could run rich.   In "old skool" cars, manufacturers always used to vent PCV to atmosphere. It is only the modern emissions laws that now force them to re-circulate any crank pressure. From that you can draw your own conclusion about what would be best.  

This is what I will be avoiding with the proposed setup in drawing Can anyone see any issues with it not working or causing more damage that the current setup which is a standard PCV system oem

[CHILL Gone DUTCH]

The exhaust systems do work but I've only seen them on pro-stocks etc. If you search 'oil separator' on ebay you'll find quite a few centrifugal ones that return oil to the sump and connect to the inlet. These should minimise fouling but htere's no reason you cant vent it to atmosphere via a filter.

 
Eg. MANN Provent 200
 

 
http://www.inlinefil.../FMH-3931070550
 
Originally a truck/generator/agriculture product, but very popular on offroaders and many boosted setups.
 
Drain hose on these can/should be connected to the sump below the oil level (otherwise needs a 1-way valve) so any collected oil drains back into the engine sump.
 
Bye, Arno.

Probably will end up with more than 250 kW but other than that it looks like the answer
Cheers

[oakmere]

I have said it before but I would try one of these proper separators first before adding all the complexity of the exhaust method. The way I see it the original method worked but you were getting oil sucked through the TB contaminating the laminovers. By adding an oil air separator should solve the problem, the one above or an air compressor filter would be my choice.

[vocky]

@ vocky

Couldn't we create this from the turbo oil return,



For pulling gasses out
And simply put a filter straight on cam cover to let air in

this is just plain wrong for the z22se engine.

 

Air goes into the cam cover.

 

The PCV requires a vacuum to remove the excess air pressure inside the engine.

 

Sod using the exhaust for a vacuum source, use the saab servo pump and an inline filter 

[Arno]

Probably will end up with more than 250 kW but other than that it looks like the answer Cheers

 

 

You could always go with the 400 or even 800 model

 

Lineup and some nice background info:

 

https://www.mann-hum...ent_en_2013.pdf

 

Bye, Arno.