help designing a turbo oil pan/tank (old one spit oil out of breather?)

[Octanee]

hi guys, so i need help with a oil tank design, basically i already know how to go about the box shape, what i need, etc, my oil inlet from turbo, and such


now my old problem with my old tank was that it spat oil out of the breather, and it got really bad 1L/trip of oil out the breather tube, so i tried to add restrictions, which helped but was not the cure,

my turbo i never plumbed antifreeze into ( i will this winter) but the turbo never got all that hot i dont think, the oil i assume did some of the cooling for the turbo as it would become warm, and i'd just put snow on the tank and it seemed to work out fine to keep it cool

could that cause my oil to expand or boil, thus why it spat so much oil out??

my old oil tank never had baffles inside to keep oil from sploshing around, should i have baffles inside?

and how would i stop it from SPITTING oil out?, do i even need a breather tube for the tank? if so then how should it be placed or made?

basically im just asking for some GOOD designs or ideas to make a tank that works good,and wont spit oil out (my buddies say thank god david suzuki aint here ) my old tank was about 2.5L ouch! i only need 1L or so right? so im going to make it much smaller now, but just need ideas!, thanks

also turbo is a 2876 and running on a 1000 sdi for mountains (if relevant)

 

[turbo800]

I'm NO engineer, but I will give you some observations I've made.

With my oil tank, mechanical pump, and journal bearing it needs more volume than a ball bearing needs, as part of the oil is returned to the tank. The more its pumped it gets air bubbles in the oil causing foaming. Eventually the pump will lose prime...bad for bearings...LOL. I had to build a oil/air separator, so I always had some leaking out the vent. Even with a water cooled center section, the tank will get warm/hot to the touch. Running 0-30w, it expanded about 25%. Take that into consideration. Baffles are a must! I think with your ball bearing turbo 1 quart/liter should be fine. With the proper expansion room and air space, you should be able to get away ventless.

You could just buy one of these too...
http://www.turboboyz.com/catalog/product.php?id_product=238

 

[Octanee]

one problem i had with a sealed container before, was i think it was pushing oil out of my seals into my compressor and such because my intake was getting lined with oil,

i did fill this some what 2.5L box right full to the top however, could that be why?

nobody could tell me before "how much could i expect oil to expand", you say 25%, well thats a good number, gives me a idea right there,

but i do wonder on making one vs buying one.... hmmmm

 

[turbo800]

Not sure what oil pump you are running, but if its too much psi, it will push past the seals.

If there is no room for expansion, it will be a problem. I would recommend filling your tank 50-60% of its total capacity. Baffles will help keep the oil to the lowest point for your pickup.

 

[brycter]

we found that the oil tank needs to be alot bigger than you think. Journal bearing turbos need alot of oil over them. You must have enough room for oil to expand,drip,splash, and slosh around.

put a roll over valve on the drain. Take 4 ft of 1/4 aluminum tubing. Coil it like a pigs tail for your vent. baffle the inside to hold oil at the pick up. do not go over 30 psi. and make the tank as big as possible. you should be good.

 

[Octanee]

we found that the oil tank needs to be alot bigger than you think. Journal bearing turbos need alot of oil over them. You must have enough room for oil to expand,drip,splash, and slosh around.

put a roll over valve on the drain. Take 4 ft of 1/4 aluminum tubing. Coil it like a pigs tail for your vent. baffle the inside to hold oil at the pick up. do not go over 30 psi. and make the tank as big as possible. you should be good.

i was filling this 2.5 L tank up full to the top, nobody would tell me how much they expand, so it would spit a liter out then i'd be left with 1.5L, but due to tank design, being fairly long, not really a box shape, more rectangle that i was worried about it easilly not picking up oil, so i'd fill it up again and cycle would continue,

and my oil seals, i have a pump that pumps 10 psi, this is a ball bearing turbo i know its not made or meant to have any real pressure, ball bearing just needs a flow of oil just to keep them wet and they are happy