whos interested in a wrc breather for a yb??
#81
Originally Posted by Mitsy FQ
next you will be modifying your turbo oil return to return below oil level too
#82
Originally Posted by Billabong
Originally Posted by Mitsy FQ
next you will be modifying your turbo oil return to return below oil level too
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
#83
Originally Posted by Mitsy FQ
I have edited my above reply
I am right you are wrong I don't care that the wrc cars were like this the motorsport 909 sumps were designed below oil level too they didn't work and the port was blanked off in favour of above oil level return.
Mike pressure is pressure if your crankcase is pressurised that pressure will be acting on the oil too so it is worse to return below oil level next you will be modifying your turbo oil return to return below oil level too
I am right you are wrong I don't care that the wrc cars were like this the motorsport 909 sumps were designed below oil level too they didn't work and the port was blanked off in favour of above oil level return.
Mike pressure is pressure if your crankcase is pressurised that pressure will be acting on the oil too so it is worse to return below oil level next you will be modifying your turbo oil return to return below oil level too
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
#86
Originally Posted by Cosworth Rallyesport
ian is very correct here.
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
#87
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
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
#89
Originally Posted by Ryan
hmmm
might prove easier to do this than fit my GGR setup as im after the standard look
i've just got an aeroquip shipment coming over from the US aswell, doh
what does it use? -10 or -12?
might prove easier to do this than fit my GGR setup as im after the standard look
i've just got an aeroquip shipment coming over from the US aswell, doh
what does it use? -10 or -12?
#94
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
the only advantage i can see for returning under the oil level is to stop the oil getting airated
#96
Thread Starter
PassionFord Post Troll
Joined: Mar 2006
Posts: 3,176
Likes: 2
From: st.annes, blackpool
Originally Posted by Mike Rainbird
Paul,
£307.50 + del if six were ordered (modified to suit road car application as well) .
£307.50 + del if six were ordered (modified to suit road car application as well) .
#97
Thread Starter
PassionFord Post Troll
Joined: Mar 2006
Posts: 3,176
Likes: 2
From: st.annes, blackpool
Originally Posted by NEEDFORSPEED
Originally Posted by Mike Rainbird
Paul,
£307.50 + del if six were ordered (modified to suit road car application as well) .
£307.50 + del if six were ordered (modified to suit road car application as well) .
#98
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
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
#106
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 .
#108
Originally Posted by abdr500
oil crashing back into oil will be slower in returning it so above oil is correct i agree with turbo systems on this
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