fiestaturbo.com

[MOONDUST FRST]

As the title says pics would be a great help as would instructions! Think I got the swirl pot sorted just the oil breathers a bit puzzling HELP! Cheers.

[Project]

Hope this helps

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<font size=-1>[ This Message was edited by: Project ST2000 on 2002-03-19 01:40 ]</font>

[oli]

not realy, Al
i dont about others, but i cant see the picture

[PhilM]

The bottom of the oil breather will have a hose, that will goto the crankcase (back of block).

There should be a little hose to the inlet plenum.

And the others goto the rocker cover. I am not 100% sure about this, as i only know the ERST one, but one goes to the meterhead on the ERST, so i'd guess it goes to a little breather filter???

[Project]

Can you see it now chap(s)?

[Muzza]

nope...

[Muzza]

hang on, i can see it now

[Project]

One last try and then this fcuking PC goes in the skip ...

[Muzza]

I cant see it on al's post so this should work (hopefuly)

[Excursion]

chaps is it the norm to plumb your frst oil seperator return to the crankcase?

this is bad practise the return should go below the oil level in the sump

excuse me if i misread

[Project]

On 2002-03-21 16:31, Excursion wrote:
this is bad practise the return should go below the oil level in the sump

But difficult to do and even harder to guarantee a leak won't occur that will lose all your oil surely??

[Excursion]

i had a outlet turned on a lathe and welded in - its worth doing really cos venting back to crankcase has no effect

[Project]

ahhhh I get you.

So what you're saying is if there's a separate return with the oil in the bottom, but with no crankcase gases flowing upwards, the oil vapour will be able to condense more effectively than if it has to more or less gather in the swirl pot until the rising gases slow down??

[Excursion]

yeah spot on mate, if theres crankcase pressure from the drain return then there wont be a swirling motion inside

[MOONDUST FRST]

Thankyou chaps

[MOONDUST FRST]

Uhoh! My spec-r oil breather has 5 outlets! Wheres the fifth one for

[Project]

At a guess it goes on the right of the inlet manifold instead of the left then - bottom pipe to sump, two pipes to the rocker cover, one to the air filter and the thin one to the breather pipe?

[PhilM]

Excusrion, how is crankcase pressure relieved then mate??

I know it will go through the oil return cores between the crankcase and the rocker box, however this isnt the best way todo it, although it will work, any thaughts on this??

My idea would be to join it onto one of the two rocker breather pipes, that way there will be hardly any movement of crankcase gasses up these oilways in the block, giving a better oil return.

That sound right?

[Project]

You must still need a vacuum, usually provided by the inlet manifold (pre-turbo on turbo'd cars) to draw the gases into the swirl pot at times of high vacuum/low load...??

The sump to rocker breather pipe is designed to reduce pressure in the oil-return bores to allow a continual flow of gases around the engine - in an ideal world the swirl pot would only need to be drawing gases from the normal breather system takeoff at the top left of the rocker cover, where the oil would be collected and drained into the sump via a tapped return as Mark suggested, and the excess blowby gases drawn into the engine and burnt.

Worth a try??

[Excursion]

(Y)

I personally don't like running a vacum line on mine as i want it as detonation free as possible - just a safety precaution for the warm weather really

You can either vent to atmosphere via a small filter or run an oil line to the back of the car.

Phil - you still have a take off from the cam cover and crankcase - but the return goes back to below the oil level in the sump (meaning the crankcase pressure isnt forcing the sperated oil back the wrong way) - you can either vent to atmosphere from the breather or take a vacum line

[Project]

Mark, couldn't you just take the vacuum from pre-turbo. I.e. midway between the airfilter and turbo??

[PhilM]

Hmm!

I kinda understand what your saying...so Ideally on a Zetec setup I'd want; (Using a S2 separator).

Crankcase going to one of the "Rocker" Inlets on the Separator.

Rocker cover one going to the normal place on the separator. (Only one on a Zetec, uinlike the CVH's two, so one is used for the crankcase).

The vacuum pipe plumbed in before the turbo inlet (So it has vacuum, but not from inlet manifold).

One of the connectors with a breather filter on.

And the final oil return one; below the oil line in the sump.

That right?!

Excursion; can you explain why having the vacuum line connected to the inlet manifold would cause det problems etc dude, not quiet understanding that one just yet. (Though I'll put my vacuum line before the turbo inlet).

Cheers!

PS. Doesnt this mean 99% of breather systems are plumbed in "wrong"?

[Excursion]

It's a bit of a perfectionist detail really as most systems will be happy draining through the crankcase - but id want a sump drain above 14psi myself (Y)

The reason I dont take a vaccumn line is oil mist in a high boost engine is bad - the oil burns atop the very suraface of the piston creating localised heat spots which equals detonation (more chance when cornering hard).

[PhilM]

So just lave the vacuum hose blocked off. Will the breather still function well then mate?

[Excursion]

BETTER THAN YOUR AVERAGE LOAF!