Catch cans: placement and model

[LuisVton]

Hey Guys,

What are you using for catch cans and where are you putting them under the hood? Any pics would be greatly appreciated.

Cheers,
Luis

[G60ING]

I too would like to see. I'm thinking of adding one for my TDI. I'm thinking about using the Mann Provent 200 and making it mount to where the G60's vacuum pump normally sits near the coolant bowl. I've also thought about plumbing it into the exhaust and not using the Mann Provent.

Below are some pics of the provent from this tdi thread: http://forums.tdiclub.com/showthread...480#post846480





Here is one I had on my G60 way back in the day:

[54blunts]

i was running one on my old engine, im not on the current one. i picked one up for cheap on ebay. i never had a permanent mounting place for it as i was having serious engine issues so it was just temporarily installed, but here is where i put it

[ticketed2much]

G60ing, checked out the link you posted, it seems some of the Diesel engines had problems with water in the catch can filter freezing during the winter. Just wanted to know if this occurs in gasoline engines, or if anyone has experienced this with other catch cans?

[G60ING]

G60ing, checked out the link you posted, it seems some of the Diesel engines had problems with water in the catch can filter freezing during the winter. Just wanted to know if this occurs in gasoline engines, or if anyone has experienced this with other catch cans?

Most catch cans don't have filters. Most of the Tdi use the filter to keep crap out of the turbo inlet. Venting to the atmosphere can cause stinky vapors and that's why on my g60 it vents close to the air filter.

I'm not worried about frozen condensation where I live and I wonder if you would be driving your rado on days where it could freeze.

[HavokRuels]

G60ing, checked out the link you posted, it seems some of the Diesel engines had problems with water in the catch can filter freezing during the winter. Just wanted to know if this occurs in gasoline engines, or if anyone has experienced this with other catch cans?

Yes it does freeze, I have 1st hand experience. It obviously melts while operating the vehicle to some degree but if its close to full overnight, you've to a mess the next day.

A well vented setup needs to be drained every 200-300 miles, that's why I integrate a pet **** at the bottom with a hose running close to the ground. Open/drain/close in 30 seconds.


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[leebro61]

2-300 miles seems awful quick to be filling up a can.

Here is mine. It's the large, black cylinder just in front and slightly to the right of the coolant reservoir. It's a bit bigger than it probably needs to be, but it was based on piping I had on hand and I'm lazy, so the less I have to drain it the better

[HavokRuels]

2-300 miles seems awful quick to be filling up a can.

Here is mine. It's the large, black cylinder just in front and slightly to the right of the coolant reservoir. It's a bit bigger than it probably needs to be, but it was based on piping I had on hand and I'm lazy, so the less I have to drain it the better

I thought so too but then I saw that 034motorsports posted on Facebook that it was typical on their car too. Keep in mind that was on my 1.8t maybe it's different on a corrado. I'll find out as soon as mine is back on the road.


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[LuisVton]

Thanks for all the pics! I was hoping to go crinkle black like a the one posted above; I like that discreet look. I am also thinking drain plug (if not included) will definitely be added for quick maintenance.

Has anybody picked up the Greddy or 42Draft design catch cans? If so are they work the money or should I be going DIY?

Thanks again for all the feedback.

Cheers,

Luis

[HavokRuels]

Thanks for all the pics! I was hoping to go crinkle black like a the one posted above; I like that discreet look. I am also thinking drain plug (if not included) will definitely be added for quick maintenance.

Has anybody picked up the Greddy or 42Draft design catch cans? If so are they work the money or should I be going DIY?

Thanks again for all the feedback.

Cheers,

Luis

I've always used 50.00 ebay cans. They are built very well but that's just my take.


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[Rento_VW]

Catch cans are so Honda-like... Not like we have tons of blow-by. Mine goes straight to the street.

[leebro61]

Catch cans are so Honda-like... Not like we have tons of blow-by. Mine goes straight to the street.

[turtledub]

I am probably going to delete the power steering and that is where I will put my catch can. I just need to get the block adapter.

[thecorradokid24]

Catch cans are so Honda-like... Not like we have tons of blow-by. Mine goes straight to the street.

New Jersey catch-can

Same here.

[HavokRuels]

New Jersey catch-can

Same here.

that's no a bad idea at all.


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[BlueS14]

Ebay special

[Yareka]

Bad thing about the ebay cans is that they reduce down to 3/8" fittings which is not healthy for ventilation. Dont drop down below the stock size 3/4" fittings/hose with whichever can you use.

I use the jersey route as well, straight down and underneath the car.

[HavokRuels]

Bad thing about the ebay cans is that they reduce down to 3/8" fittings which is not healthy for ventilation. Dont drop down below the stock size 3/4" fittings/hose with whichever can you use.

I use the jersey route as well, straight down and underneath the car.

Yep, that's why I re-drill mine and tap to 3/4npt


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[wed3k]

Catch cans are so Honda-like... Not like we have tons of blow-by. Mine goes straight to the street.

i like that idea because mine has a filter and i can smell the fumes when sitting at a light.

[Wayne92SLC]

Ran a vented one for a while. Holy stink...


VR6 build 093 by wayne92SLC, on Flickr

Went to a closed loop version. By the way, I filled both of these with strips of stainless steel screen door material from the hardware store to help the condensation factor.


S2 header project 008 by wayne92SLC, on Flickr

Now, I have nothing since my location one the rear motor mount is taken up with tubing from the S2 header.



S2 header project 024 by wayne92SLC, on Flickr

[People'sCar]

What's the purpose of a Catch Can? I see them always come up on eBay.

[HavokRuels]

What's the purpose of a Catch Can? I see them always come up on eBay.

Venting your crankcase and valve train away from your engine. Reduces engine gunk as that crap gets recirculated back into your intake


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[wed3k]

i recently got into a debate with my friend. there's two versions...a catch can vented to atmosphere and the oil seperator which is a closed loop shown above.

the closed version is actually legal since all the vapors are sealed within the crank and/or intake.

id like to run an air pump for evacuation

[People'sCar]

Venting your crankcase and valve train away from your engine. Reduces engine gunk as that crap gets recirculated back into your intake


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A diaper for engine waste, got it.

[cata]

I really like the Mann Provent. Being plastic, my only concern is whether it'll survive in a VR engine bay, especially a forcefed one The easiest placement for a catch can on a VR is pretty much in place of the EGR conundrum, which also happens to be right by the exhaust manifold. Diesel motors run much cooler, so for those this is a very viable option.

After searching on the internets, this is what it all boils down to.. feel free to correct me. Don't mind the information overload, it's helping me pass the time at work.

Crankcase vapor is generated by blow-by through the piston rings. This mixture typically consists of a lot of water vapor, some oil vapor, and all kinds of dissolved solids. Here's what someone's collected crap looked like..



This problem is most prominent on FI motors, as boost=more blow-by. As stated before, most manufacturers just simply circulate this junk back through the intake manifold, which is why everything always looks so gummed up on the inside. I'm running one on my N/A VR and almost 10k km later, there was nothing to be purged out of the can. However that doesn't mean it's not necessary, I remember how gummed up my TB was getting. I placed mine where the EGR was, so I think that the hot exhaust has been heating the can and re-vaporising the little bit of mixture passing through, while holding back the solids/gunk inside the filtering system. It's just a bunch of dense wire mesh, which can allow any solids to get trapped into it. For one that gets a lot of use, cleaning is supposed to be done every other oil change, and all you gotta do is spray brake cleaner into it and let it all soak, then empty it. I think this a lot more hassle free than worrying about replacement filter elements, but it all depends on application and usage.







Not that clean of a bay, but she gets driven hard Basically, instead of venting all that junk right back into the intake elbow, it circulates through the can. If anything were to be collected, it could easily be purged out of the can via the purge valve. This is what the can looks like..



On the end of that barbed fitting I have a clear hose that can direct the contents down by the subframe, where one could collect it all for disposal, or just dump it on the street lol

Venting crankcase gasses is best achieved via mild vacuum, as the vacuum helps it flow to where we want it, out of the motor. Too much vacuum though and you can suck the oil right outa the motor with it, I've heard of this first-hand. Another thing to keep in mind is that it is recommended that the catch-can be placed in the coolest spot possible, as that allows for better condensation of all the vapors that are passing through. This completely contradicts my choice in placement, however I found that spot to be too hard to beat.

There are a few other ways to approach this, if you wish to learn more about it, look HERE.

[HavokRuels]

That's a very well executed re-route

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[cata]

Haha thank you

[ticketed2much]

Is that a Schrick intake?

[cata]

yes it is

[ticketed2much]

Nice. I am jealous. Did you notice a substantial power increase at low and high RPM? Just curious, I don't see too many of these around and I would like to get one to compliment my cams. Looked all over at H2O and didn't see any.

[cata]

The more I tuned my VR for N/A, the more I feel I've lost that original low-end grunt, in exchange for extra in the top-end. The Schrick brought a lot of that back so it's a must-have for a daily N/A setup, as it makes the car enjoyable without needing to bounce off the rev-limiter. What I really like about it though is that, in conjunction with 3" exhaust, it allowed the car to finally breathe freely in the top-end, which complements the rest of the engine work. It's OK in the mid-range, but I've often been shocked to see the kinds of cars I could pull on or at least keep up with in the top-end.

Let's not hijack this thread though, feel free to PM me if you've got any other q's

[HavokRuels]

The more I tuned my VR for N/A, the more I feel I've lost that original low-end grunt, in exchange for extra in the top-end. The Schrick brought a lot of that back so it's a must-have for a daily N/A setup, as it makes the car enjoyable without needing to bounce off the rev-limiter. What I really like about it though is that, in conjunction with 3" exhaust, it allowed the car to finally breathe freely in the top-end, which complements the rest of the engine work. It's OK in the mid-range, but I've often been shocked to see the kinds of cars I could pull on or at least keep up with in the top-end.

Let's not hijack this thread though, feel free to PM me if you've got any other q's

I'm biting your catch can location


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[cata]

haha I can't take credit for it as I've seen it elsewhere when I researched it. it's really tough to find a better spot though

[1.8t rado]

42 draft designs.

[Dreizehn]

Catch can = hose under the car.