Catch Can, anyone installed?

[WJs]

Did anyone install an aftermarket catch can yet? I been told that all these tfsi/tsi engines get very dirty so its advisable to install one.

Did anyone did it yet? if so, have some pictures where and how? Dont think it's rocketscience but just like to be sure.

 

[Ben-ibizaFR]

Did anyone install an aftermarket catch can yet? I been told that all these tfsi/tsi engines get very dirty so its advisable to install one.

Did anyone did it yet? if so, have some pictures where and how? Dont think it's rocketscience but just like to be sure.

What's a catch can mate ? Beside a can that catches stuff

 

[Deleted member 67732]

What's a catch can mate ? Beside a can that catches stuff

i too was wondering what a catch can was, perhaps someone could elaborate

 

[WJs]

An oil catch can is used in turbo applications, or high-performance race applications where excessive blow-by (leakage past the piston rings) of air and fuel vapor occurs. This creates a positive pressure in the crankcase. Engine manufactures have placed a valve on the engine block which releases this pressure. This valve is known as a PCV (Positive Crankcase Ventilation) valve. During engine operation, blow-by gases, as well as oil mist from the rotating components of the engine, pass through the PCV valve and are routed back into the intake for the engine to burn off. However, some of the oil mist and other products settle along the engine intake and over time form a "gunk." The oil catch can collects the oil mist and condenses the fuel vapors while allowing "cleaner" gases to be passed back into the intake. Typically the blow-by gasses are passed through a wire mesh, which give the vapor droplets something to adhere to. Since the oil catch cans condense the vapor portion of the gasses, they will need to be drained periodically of all the oil, fuel and other contaminants.

Ninjaed from wiki answers.

 

[Jay1990]

Would venting the PCV to the atmosphere via a little filter(or just leaving it "unplugged") do the same job, preventing return of the oil/vapour back into the intake system?

Jay

 

[lucifer666]

yes!

 

[ibizaracebrake]

I had one fitted at TSR during the engine rebuild a year ago, catches water vapour mainly and fills up in 2 weeks in this weather, the factory race car has a large one where the battery is on the early cars. Engine runs cleaner by not burning this water/oil mist gunk. Venting to atmosphere is an MOT fail I think. Despite remap emissions were OK for MOT.

 

[Ben-ibizaFR]

So that's what the little air filters do ! Any bhp gains or just a happy engine ?

 

[Jay1990]

Come MOT time I could just pop the tube back on though. Running without it recirculating is better for the car.

There wont be any bhp gain, its just vents to the air instead of back into engine so long term there is less muck going back in and more going into the environment. Hippies would not agree with it.

Jay

 

[lucifer666]

possibly a small bhp gain of <5bhp. Just because this hot dirty air is taking the place of the air from the itake, therefore slightly undoing the good of the inake.

I have done this with the small pcv pipe. I'll be doing the other one when i gather the parts.

 

[WJs]

Got my catchcan, any of you know where to connect it?

 

[ibizaracebrake]

Youtube - 'Ibiza MK5 Catch can connections'

 

[WJs]

Thanks a ton!

http://www.youtube.com/watch?v=uzWXoYBICFg

 

[WJs]

Just one more question, what did you do with this one that I marked red:

There are so many little tubes going on and around it, so confused. hehe

 

[lucifer666]

thats a smaller breather too. You want that going to your oil catch can too. I have had oil squirting out of there under misfiring, it ended up splitting the tube

 

[Jay1990]

You Can Just vent the smaller one with a little filter can't you? Thays what I'm doing with mine at least rather than plugging it back into the intake.

Jay

 

[mk4 cupra]

I have got to say fitting a catch can is a good idea and I agree but venting to air with a little filter at the end I do not advise at all

I don't advise becasue the engine breather system is there to do a job to lower crankcase pressure there for putting a filter to at the end of the pipe which restricts flow of air and blocking up easily is not adviserable becasue this would cause the crankcase pressure to rise not good.

So in other word always fit a catch can so the air flow is not redused and and keeps everything working how it should just with out the oil residue returning back to the intake just remember to drain it weekly.

 

[Jay1990]

Thats a good shout actually. Was guna buy a little filter rather than It going to intake/venting direct but I won't bother now lol

 

[lucifer666]

I have got to say fitting a catch can is a good idea and I agree but venting to air with a little filter at the end I do not advise at all

I don't advise becasue the engine breather system is there to do a job to lower crankcase pressure there for putting a filter to at the end of the pipe which restricts flow of air and blocking up easily is not adviserable becasue this would cause the crankcase pressure to rise not good.

So in other word always fit a catch can so the air flow is not redused and and keeps everything working how it should just with out the oil residue returning back to the intake just remember to drain it weekly.

Disagree, a filter will offer minimal resistance to the air, thats what its designed for, its called a breather filter for that reason. Its just to stop the tube sucking up crap if theres a slight vacuum. If you look at the standard tube, theres a valve on it which requires a little bit of preasure from the crank for it to open(at least the same as a filter), mine clogged after a while which probably resulted in the split of the tube and since it was disconnected, I haven't misfired either.

100% vent to the air with a filter. Some people even connect it to the exhaust but i dont think its necesarry.

 

[Jay1990]

I had a little on lying around, I'm guna try it out, can still hear plenty air coming out of it on idle, will find out how it drives tonight. I doubt there will be any difference one way or the other.