in this picture, where does the top line from cath tank go to?

 

IDK what this guy was doing but the catch can should be hooked up to the PCV valve and the intake manifold.

 

do you know why? should it be a problem to a car if he let the top line to the atmophere?

 

The PCV puts out significanly more blow by than the other plug. A lot of folks put a breather on the other valve cover hole, but I'm pretty sure you won't lose much oil if you just leave it as it is - that being connected to the intake in front of the throttle body.

 

There's no point in that catch can if it's plumbed like that. One hose ffrom the can goes to the PCV, then a different house goes to the intake manifold (vacuum pressure). The vent in the front can be plumbed as it was stock. There shouldn't be oil coming out I there.

Basically the catch can is supposed to split the stock hose plumbing, catch can goes between the PCV and intake manifold.

 

What this guy said. The other line off of the valve cover is the breather. The PCV vents and the breather breaths(for the most part).

Anyone have pic's of the rediculous breather set ups? I know it's common on turbo motors and alot of all motor Honda guys run them on their high HP set-up's. Never saw one on an S2K though. The VC is usually drilled and tapped for bigger lines, which flow to a can, which flow to the oil pan. In theory it should free up a few HP but who knows.