Running from catch can to sump?

[TheFlyingBadger]

Recently I noticed a few people running the hose from there catch cans down to the sump below where the oil return is for the turbo..

Can any explain the difference to doing this as apposed to running it into the air intake before the turbo?

The catch can should (normally) have 3 entry/exit points.



Having the catch can in place stops all of that nasty, oily air getting back into your inlet manifold and clogging it all up.

Some people choose to take the condensed air and feed it back into the sump (the provent needs an additional non-return valve if you do this), other people just put a tap on there and drain it occasionally.