Why don't more people run oil catch cans? You know, the can that collects oil vapors that would normaly go back into your intake stream.

Supposidly you can safely run 3 more psi w/o detonation. However the way I look at it, you can run what you run now, that much safer.

Either way why dont more people run these? For a reason, or because they don't know about it?

Matt

 

I think because Im too much of a cheap skate. I think I will eventually build my own, rather than spend the huge price tag greddy has on them.

art

 

Huge price tag?! HA!

I'm doing mine for under $80. All you need is the Moroso Dry Sump Breather Tank (works as a catch can) - which is 65 from summit racing - and like $15 in little accessories.

If you want to read more about it go to http://www.theoldone.com and do a search in the forum.

 

Ok, here's what you need:

Moroso Dry Sump Breather Tank (Catch Can). # 85470.
$74.99

Fram FV294 PCV Valve
$1.99

Help! Ford Van PCV Valve rubber grommet.
$1.99

Watts 3/8” Flare to Flare Union. #A-165.
$1.37 at Home Depot

Watts 3/8” x 3/8” Barb to FIP Adapter. #A-298. $1.90 at Home Depot

Watts 3/8” Barb Splicer #A-290
$1.56 at Home Depot

3/8” ID Clear, High pressure tubing. 10 feet.
$7.25

Teflon Tape.
$.58

Small hose clamps. 6.
$.74 each.


Put Teflon tape on A-298 adapter. Screw A-298 adapter onto A-165 flare to flare union. Put Teflon tape onto A-165 union and screw into side of Moroso tank. On the passenger side of the engine compartment, on the frame rail, under the brake line, there is a bolt that holds the brake line hose to the frame. Remove the bolt and install the catch can tang at this spot, re-installing the bolt through the can tang into the same hole in the frame. Remove PCV hose from intake manifold barb. Install barb splicer into end, securing with hose clamp. Install one end of the high pressure hose onto the other end of the barb. Secure with hose clamp. Determine length needed to install the hose onto the Watts barb adapter on can. Cut to length. Install onto barb on can, securing with hose clamp. Put high pressure hose onto barb on manifold. Secure with hose clamp. Determine length needed to top of catch can. Cut to length. Install Fram PCV valve into Help! grommet. Install grommet with valve onto top of catch can. Install the hose from manifold barb onto PCV valve. Secure with hose clamp. Zip tie hoses securely. Finished.

(taken from vactor from TOO's forum. thanks.)


also here are some pics of how to set it up:


and heres the slash cut tube to ensure positive pressure in the vavle cover:

 

Just wanted to add this review I found also:

 

Yeah, Moroso is an American version of Greddy. In other words, SEVENTY FIVE BUCKS FOR A PLASTIC BOTTLE!!!! If I were going to spend that much, I'd pay an extra 20 and get the Greddy. I don't believe the Moroso is baffled either.

 

Actually you would be wrong. The Moroso can is aluminum and is the only one that I know of that's baffled.

This topic comes up maybe once every three months. Spouting TOO wisdom is nice, but 3psi is some kind of theoretical number that doesn't really mean anything. For $80.00 it's an okay mod.




Don't use that clear line. It took about 3 days for that line to collapse on me from the vacuum. I went to Home Depot and got some clear reinforced 3/8" tubing which took about 2 weeks to collapse. Get the strongest stuff you can, or just use 3/8" fuel line.

These guys talk about it more here: Do a search... http://www.hostboard.com/cgi-bin/for...pics&number=40

 

Why not just run a tube off the oil seperator onto the ground?

 

Supposedly the vacuum actually sucking at the PCV hose helps to clear out crud and is more useful. Otherwise it's a legality issue as well. It's illegal in most areas to run an open PCV system.

 

I always thoguht dumping on the ground was fine...ehh

 

I have heard of people running it into the exhaust though.....but I heard this is really only beneficialy for racing.

 

yup..police ticket you if you have that little filter on the valve cover...so with the catch can it makes things legal.
its not that expensive

 

I ran that one time, motor did not like it.... blowing blue smoke once in awhile if I stay long on idle. Put the PCV back problems solved.

 

So does GReedy or Morroso make this to where all you have to do is put it on instead of fabracate something?

 

Check out my homemade ghetto fabulous Mountain dew bad boy.


And yes all the Zip tie are gone from the wires.

 

Is there a way to transform the greddy catch can into a baffled type?

 

Hmm, this is all very interesting but tell me this. Under boost, the PCV valve is closed, there is no oil or oil vapor getting into the combustion chambers. So how can putting an EXTRA catch can (car already has one) between the PCV and the stock catch can allow you to run more boost? I agree is may keep your combustion chamber cleaner under vac when the PCV valve is open, but under boost it is completely closed.

 

you almost answered your own question. But the baffles help keep the oil vapors out of the intake. Also, the pcv valve (As I understand it anyway) shouldn't see boost. It should only be routed from an area that sees vaccum, like the intake on the turbo. So, the line would go from the oil seperator to and thru the baffled catch can, out the exit of the catch can and to the intake of the turbo. Refer to the diagram posted earlier.

 

You sure about this? Every one I've seen has still gone to the intake manifold. I even talked to Larry and he said so too. (Maybe I'm wrong though )

 

So you keep the 2 things separate?

The PCV->catch can->manifold

and

valve cover->small filter->intake pre turbo?

 

Vaportrail, you are talking about the breather, not the PCV valve. there is no area that sees only vacuum and not boost. there is no vacuum inside the intake tube of the turbo, it is open to the atmosphere.

 

hey jack, dont sell out and buy something.......you know we ghetto rig everything over here. geez, moving to texas and all the sudden you think your too cool for home-made parts

 

True, but you can make vacuum or boost by using slash cut tubes (or 90 deg elbows). A tube cut facing air flow creates boost and a tube facing away creates vacuum.

 

GOD, do you think that you can create 20 oz/in of vac by facing a tube in another direction? NO, That is how much vac is being pulled out of the crankcase at idle, the breather is an inlet, plain and simple. **** SLASH CUTS!!! I'm done explaining, this is starting to **** me off. PCV is not a hard concept to understand.

 

Hahaha......it's just easier that way....and plus I won't look like this:



[Modified by jbsadler, 10:26 PM 10/22/2001]