Catch Cans, good or bad or unnecessary?

[sioneon]

Running a mk7.5 ecoboost, is a catch can a good thing to have?

The new mk8 ST has dual injection to clean off the engine of oil gunk so I'm thinking having something to remove the oil vapours would be a decent thing to have.

If they are good, any recommendations?

[zain611]

I've been looking at them and I'm not too sure about the benefits. Was looking at one for my diesel fiesta. Here's a link to it and you can check out the description at the bottom as it talks about why you'd use it. By reading the description it looks like diesels benefit more off it. 

https://www.nbstyling.co.uk/product/cp2-oil-catch-tank-kit-diesel-engine/

[Lenny]

26 minutes ago, sioneon said:

Running a mk7.5 ecoboost, is a catch can a good thing to have?

The new mk8 ST has dual injection to clean off the engine of oil gunk so I'm thinking having something to remove the oil vapours would be a decent thing to have.

If they are good, any recommendations?

I would fit a catch can,

It is also important to have an inlet which dips in to the can lower than the outlet to ensure the catch can does it's job especially under heavy acceleration.

Also if possible put a metal scouring pad in the bottom of the catch tank to help catch the oil separating the oil from the air.

Here's one I modified earlier; the pipes on this one are 25mm because it's a diesel 

[Lenny]

 

[sioneon]

Cheers for the replies so far.

Are these tricky to install?

[Lenny]

1 hour ago, sioneon said:

Cheers for the replies so far.

Are these tricky to install?

Hard to say as each engine bay differs with space, the catch can needs to be positioned lower than the top of the engine to be functional 

Fit it lower than the induction pipe aswell and it fits to filter the small pipe between the engine crank case and the induction pipe to catch the oil.

There will already be a pipe feeding from the engine crank case to the side of the induction pipe; the oil catch can goes in the middle of this.

The purpose of the pipe fitted from the crank case to the induction pipe; is to suck excess oil vapours from inside the engine crank case but causes oil build up in the induction and throttle body, the catch can traps the oil by condensing the vapours yet still allowing ventilation, the crank case can't be vented to atmosphere because the vapours are toxic and would be entering the vehicle through the heater system slowly killing the occupants 🤭😩😌😴😔😵

The extra piping is to allow you find a good location also don't fit a pipe with smaller diameter than the factory as this will cause more harm than good. If anything fit a slightly bigger diameter pipe and catch tank to allow better flow.