Billabong

But then the turbo wouldn't drain as quickly as it needs to, to get 'fresh' oil through the bearings (flow).

Turbosystems

iTrader: (5)

almost correct bill and neither will your breather return if you can see my point.
If the crankcase pressure is less below oil level as mike has described surely according to his theory the turbo will return faster below oil level because according to mikes rule the pressure is higher above oil level.
it's all about differential pressures
There is a very strong argument for a higher flow version of the standard meo breather filter as it generates negative pressure in the crankcase on engine decel

ian sibbert

Tony,

I wont argue, but on all the WRC and grp'a' car installs I have seen worked on, the return is always below the oil level, this also plays out in my day job with refrigeration compressors.

We would always return to below the oil level as (especially on a gravity system like a car) you want to go the point of least pressure i.e. below the oil level, the breather eliminates and seperates any mist and oil residue, does it not before returning oil to the sump? so any potential for back pressure would consequently be eliminated by returning the captured oil to beneath the oil level....

The turbo feed is entirely different, being under pressure and the bearing only offeing some pressure drop, so the oil from this is still under significant pressure.

Ian

Micky The Finn

ian is very correct here.

Turbosystems

iTrader: (5)

the turbo oil return is not under significant pressure it does have significant flow minimum 4.5 l/min

Turbosystems

iTrader: (5)

no he isn't
the crankcase and engine is nothing more than a vessel with holes in that is being pressurised seal off the holes the pressure would be the same no matter where you measured it from top middle or bottom.The point I was trying to make is that returning the oil below oil level is not done for the reasons mike stated

ian sibbert

Tony,

So what sort of pressure does the turbo return line see?

I realise the larger bore on the return is to accomodate the flow, but I have to say ive never measured the pressure on that particular line.

Perhaps significant was a little over exaggeration, but higher than atmospheric pressure certainly....and at that sort of level you would not necessarily need it to discharge under the oil level, but again in an ideal world i would probably want this return beneath the oil level to prevent aeration of the oil....

Its an interesting subject, both car and non related.....

Ian

Turbosystems

iTrader: (5)

the oil return sees crankcase pressure

Mike Rainbird

iTrader: (3)

Ryan, -10 and -8 (return). See Ian's thread for more info . These ones will be made with the 19mm port for the standard item in the block, unless you wanted one that was 22mm?

Ryan

would be for a standard 19mm outlet.

hmmmmmmmmmmmm

Turbosystems

iTrader: (5)

no body is saying the wrc system doesn't work tim

ian sibbert

So should we agree both methods work then? and it doesn't really matter....lol

Cos I aint re-piping my car...I cant afford the extra aeroquip.....

vikingboy

like a quality crank, pistons and rods!?

GARETH T

i cant see where it flows back to making a difference on the pressure of the return!

the only advantage i can see for returning under the oil level is to stop the oil getting airated

RANJ

anybody want my ggr kit

NEEDFORSPEED

please tell me what the difference is!lol pauls having one and so far.

NEEDFORSPEED

just read the 3rd page! didnt see it. anyway just e mailed asking for 19mm to block. -mike would you possibly pm me a list of ends il need to order?

ian sibbert

2 off -10 90' elbows
2 off -10 45' elbows
1 off -8 straight
1 off -8 90' elbow.

We use a M14 to -8 adapter into the sump can be any thread or a weld boss onto the sump for the oil return.

-10 weld boss onto front of sump

3/8 NPT to -10 adapter for the block, under turbo...

Block tapped at M4 where it fixes by the block outlet...

22mm Silicone hose from breather to catch tank

HTH

Ian

NEEDFORSPEED

whats the block tapped at m4 for ? thanks for the info

jon@work

iTrader: (5)

the small fixing lug at the front of the tank

NEEDFORSPEED

oh ok m4's tiny thats all. just priced up ends of a place on ebay 75.00 without hose. wheres cheapest to get them from?

jon@work

iTrader: (5)

listers or think automotive

abdr500

iTrader: (1)

oil crashing back into oil will be slower in returning it so above oil is correct i agree with turbo systems on this

Fibly

Neither can i!!!

Ryan

cheers for the list ian, i will get a price today

Mike Rainbird

iTrader: (3)

The price I have quoted includes for every piece of 'Quip you need, all fittings and all alloy bosses for welding into the sump . Road going 4x4s should be slightly cheaper, due to the mods required .

Ryan

just priced up the quip. gotta love -10 90 degree fittings, there sooooo cheap

Billabong

But your oil seperator isn't going to be full & flowing as much oil as a turbo, unless you have a major engine problem.

abdr500

iTrader: (1)

Billabong
i ment the oil return from the turbo