rs_jim

Hi has anyone got any diagrams or pictures of a standard s2 rs turbo breather set up

Thanks

rs_jim

Any help would be much appreciated

studabear

What is it you actually need to know?

My old cvh with the standard breather system, you can make most of it out, if this is of any help?

Chas

Right,

How the CVH breather system is meant to work (in therory):



Other parts to a KE-Jetronic setup:





I'll annotate one of the shots above but IMO the breather system on an MFI'd RST works as follows

1) The pipe going from the crankcase to the rocker cover (oil cap side) vents the crankcase gasses into the top.
2) On the other side of the rocker cover the outlet goes into a crankcase filter/PCV type of setup (I am assuming the last bit here admittedly).
3) With the smaller bored pipe of the two at certain conditions (idling being one) it will suck the crankcase gasses into the inlet manifold and at light cruising conditions. The other longer and large bored pipe goes to the metering head (this bit I am unsure about admitedly).
4) When the car is on boost the one way valve in the long small bored pipe prevents the crankcase gases from being pressurised from the not positive inlet pressure. In these condition the rocker cover vents more of its crankcase gasses into the metering head.

I am happy to be corrected here (As I said, I am guessing the system works like this).

Versus_Creations

iTrader: (1)

No offence pal but noone really cares what the standard system does as it cant do it well enough.

Best place for that lot is in a box in the garage.

As for the large pipe returning to the metering unit.. its actually putting waste gasses back into the engine due to environmental factors. Not for any benifit to the engine. This is one of the worst parts about the mfi system and breather.

Fact is you need a better setup like the bailey breather.

Chas

Fair enough. I always like to *try* to understand something as opposed to blindly believing things and handing over cash simply because many said 'it's not good enough'. With that talk I would never own a Ford and possibly a VW with how many peeps talk about Fords (and I have probably owned Fords more than any other car before someone calls me an anti-Ford man ).

Karlos G

iTrader: (4)

Depending on your power level the standard breather system is fine if the pipes are clear, the one way valve is working and there are no leaks (filter casing splitting is common for example).

Upgrading to a Bailey or similar system is only needed if your running big enough power to have increased crank case pressure to the point where the stock setup cannot handle it.

I do agree with Jano though that venting your oily fumes back into the engine is not ideal (but it's not just MFI that does this, every car since the late 1960's recirculates it's crank case gasses and burns them as standard), strictly speaking a road car should not vent to atmosphere.

Chas you make a good point, understanding is far better than just blindly doing what you are told.... What's that old saying about a cliff and jumping off it! lol

day_dreamer

maybe off topic but what is the ufo spaced thingy in the vacuum hose coming from the inlet to the valve? Is it an restrictor or some kind of filter, because the previous owner upgraded the vacuum lines on my car and now this ufo thingy is missing.

Versus_Creations

iTrader: (1)

Wont run right without the one way valve on the std breather setup.

Also the std breather is not good enough at removing crank case pressure with std boost levels let alone anything above.

Karlos G

iTrader: (4)

There is a one way valve (small UFO shaped thing maybe? lol) and then the larger item is a filter (nearer the rocker cover take off).

Depending how they have plumbed it all up after replacing the vacuum lines it will either be fine or potentially flowing boost into the rocker cover.

day_dreamer

I'm missing the one way valve then (the ufo), it is placed in the vacuum hose that comes from the manifold and goes to the bigger filter (the one with 3 connections, vacuum, to the rocker cover and to the airbox).

I looked at some microcat pictures I found on this side but ford is not listing them by the looks of it. it is hose nr 6 I think.

dazrsturbo

iTrader: (3)

im pretty sure i have one of the one way filters kicking about somewhere

Versus_Creations

iTrader: (1)

Pic is of s1 setup which was flawed from the start missing the valve out.

The s2 had this fitted to every breather setup.

day_dreamer

thank you all. I will see if i can find one somewhere for now. I understand that the setup is not the best but I have so many other stuff to fix and check first that I do not want to start upgrading yet.

Versus_Creations

iTrader: (1)

I have valves spare you can have one if you cover postage.

day_dreamer

thank you I would like to make use of this offer, but I'm dutch and live in the netherlands. If you could let me know what the costs will be and how I can get the money towards you in a PM that would be great.

Karlos G

iTrader: (4)

May as well just buy a brand new one way valve where you are mate, nothing special about them, just get one with the correct size barbs for the hose, only a couple of Euro's.

rs_jim

On a standard breather set up the pipe that connects to the meetering unit can that vent to atmosphere or does it have to be connected