FEW QUESTIONS.F.I .

[gcorky]

hello pepes,

few questions on what you have done with your crankcase vent,and secondly have you restricted the oil flow to the turbo.im sure fozzy has a bailey filter which is used as the restrictor.i have one -will this suffice?

r.e the crank been lookin at catch cans or will a well routed filter/breather work just as well?

answers on a postcard....................no just post here...

[Widge]

Dunno about oil feeds but I would have thought the more oil the turbo gets the better.
As for crank breathers i have seen turbo setups with little K&N style filetrs on them, and I have also seen ones with a catch tank, so it's up to you

[Ant]

Restricted oil flow on a wet journal turbo is a bad idea, especially if its an oil cooled core, the filter is a good plan if you already have it though G.

as for the vent, the hose from Rockerbox to TB must be removed and blanked off on the TB, the choices are, as Widge has pointed out.

vent to atmos using little K+N jobby ( smells in traffic, makes you feel sick ! )

vent to catch tank then vent to atmos, see above !

vent to catch tank, purge the vent back to the turbo intake, best idea and can be done with 15mm copper pipe from B+Q, this is my next mod after the EDIS, I can live with the smell for now

[gcorky]

hello widge m8,actually too much oil to turbo can be deterimental and cause the turbo to blow seals etc,ive read on a few sources that it is best to bath the bearings.

dont know if the m20 oil pressure from switch is too much to run as is,to feed directly to turbo?

[Widge]

I wouldn't have though that the M20 oil pressure is a turbo killer, but I hadn't thought about the seals, that's what made the 80's turbo F1 cars belch grey smoke when the turbos blew up.

As for oil breather, I'd go catch tank and turbo inlet vent.

The filter on the oil supply sounds like a good idea though.

[gcorky]

ANT -MAKE YOU FEEL SICK....LOL,ooohhh dont want that hahahah,i know what ya mean.the turbo used at the mo is water cooled too and will fit in the filter.i was lookin into catch cans etc but ive seen a few of the guys on here putting a filter,breather straight onto cam cover outlet-or tubing.

well its all becoming clear now,(bar the ms-been reading upon it,wow too much info,)think about the bolt - on work first!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

should be done by christmas...lol...holidays...house improvements etc gettin in the way!!!

[Jon_Bmw]

This is the way I look at it, my opinion only:

The oil feed if you take an unrestricted 10mm pipe will flow a huge amount over the turbo, and like gcorky I have read that the bearings need to be bathed not soaked! I have put a restrictor in to reduce the flow significantly, i looked to see what was coming out of the return pipe until I was happy. Another thing I thought of was if you take a lot of pressure and oil running it through your turbo feed then you are reducing the amount that gets to the big end bearings etc etc. Again just my thoughts, but they seem to be logical, well at least to me

I just have a filter directing straight to the atomsphere, i get a little ploom of smoke when reving the engine with the bonnet up, never bothered me, so i left it like that. Seems to work well.

HTH

Jon

[Toby_Unna]

Jon what filter did you use?

altenatively, if i run a pipe from the cam cover vent to the turbo inlet, why do i need a catch can in line?

[Widge]

Well if it decides to spit oil, you don't want it coating the turbo.

[e30_Turbo]

I've no restriction in my oil feed, straight through braided hose with a custom top half to fit the feed on the Holset. The guy at the shop informed us that it was good for 500psi!! OTT I know but good info still.

We checked the flow by using a clear pipe and watching as the engine ran to see what the flow was like, seemed fine as is so it was left unrestricted.

My rocker cover vent is the same as Ant's, as in nothing at all.

It don't bother me too much, maybe add a catch can one day, the smell is only when you stop for a sec.

TBH all you can smell in my car is either my ass or burning rear tires

[Toby_Unna]

what's on my mind is that my car and all the bmws i've had don't run right with the oil filler cap or dipstick removed, so i'm reluctant to vent it to atmo?

do standard m20s run ok with filler cap removed i.e. no drop in idle speed etc?

[Turbo-Brown]

Another vote for the little filter to atmosphere.

Does smell a bit mungy in traffic, but it all adds to the drama

I've not got any restrictors in the feeds, but I'm only using copper brake pipe which has quite a small bore anyway.

Doesn't seem to smoke.....yet, but will check this weekend when I'm fiddling with the oil system that there isn't anything in the compressor housings.

[Jon_Bmw]

Jon what filter did you use?

altenatively, if i run a pipe from the cam cover vent to the turbo inlet, why do i need a catch can in line?

I'm using a vectra one, god help me. Its the breather mod that they used on these engines as the early ones and the cavaliers suffered from clogged up throttle bodies and IACV's... Anyway you could use this as its basically an inlet pipe--->metal Guaze(spel?)---->outlet pipe, all inclosed in a plastic container. You could then connect this up to the turbo inlet if you felt particularly environmentally conscious!

Personally I haven't and it seems to work fine for me as with Ant, Mark and Alex it seems.

[gcorky]

altenatively, if i run a pipe from the cam cover vent to the turbo inlet, why do i need a catch can in line?

hmn dont like the thought of this aint it gonna draw oil/mist in to i/c etc.......someone mentioned idle probs with dipstick out-u need to plug the other end of breather hose that goes to cam cover?


catch can and bailey turbo filter it is,incidently fozzy the holset taking 500psi ,well yes they are built to last-garrett eeerrr not so robust,me thinks

heres the link for filter,
http://www.demon-tweeks.co.uk/products/ ... e=BAITOF31

[lentec]

Got mine breathing thru a swirl seperator from an alfa then to the charger intake vacume side of the swirl pot thru a catch can and check valve!

My idle dosent dip with the cap on off or any other way!

[Brianmoooore]

what's on my mind is that my car and all the bmws i've had don't run right with the oil filler cap or dipstick removed, so i'm reluctant to vent it to atmo?

do standard m20s run ok with filler cap removed i.e. no drop in idle speed etc?

Nothing to do with venting the crankcase to atmosphere per se. It's just that you're letting unmetered air into your inlet manifold via the breather hose.

[e30_Turbo]

what's on my mind is that my car and all the bmws i've had don't run right with the oil filler cap or dipstick removed, so i'm reluctant to vent it to atmo?

do standard m20s run ok with filler cap removed i.e. no drop in idle speed etc?

Nothing to do with venting the crankcase to atmosphere per se. It's just that you're letting unmetered air into your inlet manifold via the breather hose.

And thats Brian, why YOU ARE THE MAN!!

I would imagine all of us 'boost junkies' have sealed that feed on the TB.

[Brianmoooore]

Know nothing about turbocharging though. I'll leave that to you nutters.

[e30_Turbo]

Know nothing about turbocharging though. I'll leave that to you nutters.

When we meet I will happily show you WHY I've done it although I too am still learning about this whole boost thing, every question seems to lead to more and more......and thats not mentioning the ecu and tuning side of things

[Turbo-Brown]

Ah ha!

Took my front turbo off today to sort out some stuff, but whilst it was off, I had a look in the compressor housing.

Now last time I had the housing off there was a little bit of oil in the bottom which I assumed was the lack of restrictor in it's oil feed forcing oil past the seals, so I was expecting it to be swimming in oil!

Seems that it's dry as a bone in there now with no signs of leakage at all!

Does raise the question of how do we know when we need restrictors in the oil feed lines though!