PETERPOOP's Turbo Build Thread.

[Tamago]

Originally Posted by Focus_Sh1ft

Ok, so whose right about this? If you have oil hitting oil, then that means your line runs right into the oil, which is going to cause it to back up in the turbocharger. I now know this from experience unfortunately.

But now you're saying oil into air causes foaming? Uh...

Thanks for the pics btw.

huh? you need to go pour soapy water into a pitcher and see what happens, then pour the same water through a hose into the same pitcher..

how would oil back up into the turbo because it terminates under the oil line? that doesn't even make sense..

[Tamago]

Originally Posted by Tamago

huh? you need to go pour soapy water into a pitcher and see what happens, then pour the same water through a hose into the same pitcher..

how would oil back up into the turbo because it terminates under the oil line? that doesn't even make sense..

basic hydraulics will tell you to NEVER terminate any return line above the oil line. its not the oil hitting the air that causes foaming, it's the oil hitting the top of the oil. just like filling a bucket up that has soap in it. if you hold the hose above the water, the turbulence of the water landing on the top of the water will cause the soap to foam. if you put the hose under the water it does not disturb the oil..

[cdydjded]

Originally Posted by Tamago

its not the oil hitting the air that causes foaming, it's the oil hitting the top of the oil.

Originally Posted by Tamago

you do NOT want that hot oil hitting anything but oil when it enters the pan... if it comes out into just air, you'll foam your oil and do damage to your engine

[cdydjded]

Originally Posted by Tamago

basic hydraulics will tell you to NEVER terminate any return line above the oil line.

Oil & Water Plumbing
The intake and exhaust plumbing often receives the focus leaving the oil and water plumbing neglected.
Garrett ball bearing turbochargers require less oil than journal bearing turbos. Therefore an oil inlet restrictor is recommended if you have oil pressure over about 60 psig. The oil outlet should be plumbed to the oil pan above the oil level (for wet sump systems). Since the oil drain is gravity fed, it is important that the oil outlet points downward, and that the drain tube does not become horizontal or go “uphill” at any point.

So I guess the engineers @ Garrett failed basic hydraulics 101

http://www.turbobygarrett.com/turbob...1.html?#t101_3