The V8 Owners Forum -

I'm ready to start plumbing in the returns for the turbos on my janspeed setup,now I'm fairly certain there both going straight back to the sump BUT I just wanna check if anyone else has used a different return point before I get some bungs into the sump.

Cheers
Chris

Some photo's of the -12 fittings i welded on my chevy sump.
Main thing make sure the drain is above the oil level and not in a area where it will get unduly "splashed" from the sump - i fitted mine opposite one of the big end journals.

http://www.mez.co.uk/turbo6.html

thanks for the pictures, im just wondering how much oil will actually sit in the sump whilst its running?

Eliot wrote:Main thing make sure the drain is above the oil level and not in a area where it will get unduly "splashed" from the sump - i fitted mine opposite one of the big end journals.

http://www.mez.co.uk/turbo6.html

Why do you stress the 'above level' aspect Eliot? Been looking at this and there seem to be many that claim submerged returns work better in terms of countering any crankcase pressurisation. Sounds like guff to me but fluids find their own levels so I can't see any problem tapping in under the surface provided the union is leak proof...

Mind you, I'm still struggling to understand why a gravity drain is needed... if the oil pumps in, surely it pumps out just as easily?

If the oil exit is restricted, it will back up and get spewed out the oil seal past the turbine, leaving clouds of smoke, and potentially a screwed turbo.

It must have an ample gravity feed.

As for above/below the oil level. Yes it should be above it, but if the hose was large enough, below might not pose any problems as it would still drain quite freely.