looking for suggestions on making it batter,i figure i could build it for less than $10,MOUNT IT AWAY FROM HEAT and serve its purpose,would it work?

 

To remove the oil from the vapor phase it is usually best to cool it. So PVC is not the material of choice. the steel wool is OK, as long as it is very very coarse.

You will have to drain it often if the 1" pipe is as long as the picture shows.

It'll work.

Randy

 

that was just a drwing i made this morning,i need a catch can but dont want to spend $100 + for one,they seem pretty simple so i figured i could build one,if i made the outside 8 inches tall how far should i make the center pipe come down,i could also add some sort of way to view how mch is in there,with 2 fittings and a clear piece of hose.

 

which clear hose are you using? I went out to home depot and got new hose since the greddy one got all nasty looking. It looked the same as the greddy, clear with threads, but the line collapsed under high heat, make sure your hoses can withstand your engine temps. Other wise it will close up and youll start smoking alot through your exhaust.

 

what happens when positve pressure is added in the manifold like turbo/supercharger, wouldnt that blow into the catch can instead of sucking it?

 

i like it

is the PCV valve necessary? i guess LS blocks have this coming off the valve cover

GSR b18c1's have the PCV valve coming off the lower crank vent. canister, which is not installed on a LS correct?

so on a GSR there is no pcv valve between valve cover and intake.

 

That's why you run it upstream of the turbo.

 

Explain that a little more? upstream of the turbo?

 

That diamgram looks good. Cept I would use a different material other then PVC piping.

The PCV valve basically works like a 1 way check valve

 

http://www.tgilmore.com/talon/catchcan.html

Can't beat a $3 catch can that takes up hardly any room. It's what I'm gonna be running.

Later,
Derek

 

Anyone think this method will be efficient? This looks like a really easy and cheap way to help trap that oil. I guess it would be better than nothing right? I think I'll try it any opinions?

 

Where would the other end of the fuel filter connect?

 

What do you need a catch can for?


Blaze

 

so, why don't you just run the setup like a factory turbo car has it? they have a normal pvc valve, and then the valve cover vent is run to the intake side of the turbo so that when the turbo is spooling, it sucks the pressure out of the valve cover. they don't need a catch can so why should you? just a suggestion.

 

the purpose of a catch can is to stop oil vapors from being introduced into the combustion chambers. This is important in boosted cars because oil vapors decrease the octane rating of the fuel being used and make it very easy for detonation to occur.

 

OEM's do that not because it's best but because it's emmissions crap. It's actually bad for the engine, and DSMs are notorious for having nasty oil gunk in the IC and charge piping. Some of it is from leaky turbo seals, but a lot of it is gunk from the vapors. Just like the black gunk that coats your TB and intake manifold now...

- Slater

 

umm, why cant you just buy one of these???


[Modified by turbohf, 7:53 AM 11/9/2002]


[Modified by turbohf, 7:54 AM 11/9/2002]

 

Those things are HUGE! You would have to relocate your battery to make room for one of those QT catch cans. I WISH Summit would make those $15 cans in a pint size. That would be the shizzle. If you want pint you have to get that JAZ tank and they are like $50-60! Poop on that...

- Slater

 

************ Warning **********************

You do not want to run a fuel filter as a catch can or any catch can to the PCV breather Hose going from your intake to your crankcase....

If you look at the link supplied you will see that this modification is being done on a DSM.... DSM's have Negative Crankcase Pressure and need to relieve it outward.

Hondas actually suck air in through the breather hose so any catchcan or breather filter would actually restrict airflow and thus cause longterm reliability problems because the rings will not sit right.

YOU ARE Supposed to connect the catch can inline between the breather chamber on the back of your block near the crank and the tube connecting to Your intake manifold .....


[Modified by dasher, 7:59 AM 11/9/2002]


[Modified by dasher, 8:00 AM 11/9/2002]

 

Would this actually work? Anyone using something similar to this right now?

 

its being 1 year im using fuel filter as a catch can like tha talon work perfectly for me but i have to change the filter every 1500milles i have one to the pvc and one to the cover

 

I'm wondering if you do not need a breather on your can? The PVC on top is a one way valve but what happens if you have a negative situation? Would it implode? Not sure on this one, just guessing.

 

any problems with the drawing i made?im going to make one but id like to know what you guys think about it first

 

If you have your heart set on a closed loop PCV system with a catch can, I would recommend putting the baffle material in the tube instead of just letting it sit on the bottom. Putting the baffle material on the bottom is not very effective in separating the oil and vapor, as the vapor will simply go straight to the tube where vacuum is the strongest. My $0.02.


[Modified by JT, 4:53 PM 11/9/2002]

 

what other kind of system is there to run?