Originally Posted by jEstEr?

I think its 2L for a up to 2000cc car and 3L for over for CAMS. And you're right, its quite large and could carry most of the sump. Thats the idea, so that it doesnt fill like mine and burst out everywhere. I have an AVO baffled catch can with a ~700mm capacity and i filled it passed full within 3 laps of the long track, twice. I think the plumbing might also have something to do with it, you need a vacuum to pull the air/oil vapour out of the crank/heads but I think on full noise mine is sucking the oil out too.

At this stage I'm looking at getting one of the prove/grimmspeed/sgs oil/air sperator oil caps and maybe plumbing it in after the catch can to catch the over flow. But I'm doing reading into it as what we have was basically slapped together quickly and I don't fully understand how the whole thing needs to work. All I know is, I can't do Barbs again until this is fixed or I will lose a motor