I just bought a catch can...
- Thread starter tlo86
- Start date
you dont need to use something to connect two nipples on the valve cover into one pipe, use your imagination anything will work, then use the second hole provided to run to your intake
well here is mine, mine is a rough and not very aesthetically ploeasing but it does the job for now...
AM: Condensation
The Catch can should have a vapour/liquid seperator inside (flap with a lip)
Hot Air/Oil comes in hits the cooler flap then seperates air goes back to the intake and liquids get "caught" in the can
The Catch can should have a vapour/liquid seperator inside (flap with a lip)
Hot Air/Oil comes in hits the cooler flap then seperates air goes back to the intake and liquids get "caught" in the can
i should have thought about that.....hmmm....ill just wrap it with something maybe.....keep it a little cooler i guess, i should of thought about that.....
why is it necessary for vacume to the catchcan? why cant it just have a breather filter to the atmosphere. I've been running breathers off the cam covers for a couple months now with no problems. Just curious.
hottscennessey said:
because when they clog up, you start popping seals out. just ask siman.
when they clog, the motor has no way to vent the pressure, which is bad of course. and as for vacuum to the catch can, it's to pull the vapors to the can. think of a vacuum cleaner. it wont work very well if you let it sit there and you throw dirt at it without it turned on. but when you turn it on, it'll suck the dirt right up.
-shaeff
What Shaeff said. In the stock turbo configuration the flow is from the head to the TB when the manifold is below ambient pressure. When above ambient the flow is from the head to the accordian. That's why the plumbing is different for turbos versus N/As. N/As never get above ambient so they don't need to supply a method for scavenging blowby under positive pressure.
On the turbo, whether the manifold is above or below ambient, the port on the TB is used to widen the delta P so scavenging occurs. The "boost leak" the port provides when above ambient is there for a reason so if you're not going to use it you need to lower the pressure in the catch can in some other manner.
Breather filters are the worst of all possible solutions (worse than even a draft tube) as they do nothing to increase the pressure differential. In that case scavenging is totally dependant on the delta P between blowby and ambient, which isn't very much in a healthy engine. We won't even get into the emissions or "greeness" of them.
On the turbo, whether the manifold is above or below ambient, the port on the TB is used to widen the delta P so scavenging occurs. The "boost leak" the port provides when above ambient is there for a reason so if you're not going to use it you need to lower the pressure in the catch can in some other manner.
Breather filters are the worst of all possible solutions (worse than even a draft tube) as they do nothing to increase the pressure differential. In that case scavenging is totally dependant on the delta P between blowby and ambient, which isn't very much in a healthy engine. We won't even get into the emissions or "greeness" of them.
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That'd work on an N/A but better to stick with the TB port rather than the intake manifold. On a turbo you could connect the valve covers to one port on the can and the other port to the accordian where the stock line went. Still not the best set up but an OK compromise. Always consider what the pressure differential across the two ports will be.
The can is nothing more than an air-oil/water separator. Separators work as either inertial, coalescing, condensating or a combination of the three. If the can comes apart you can tell which principle it uses. Btw, stuffing it with some plastic scrubbing pads or similar material will make it more efficient as long as you don't choke the flow. The added material increases the surface area and aids in coalescence.
The can is nothing more than an air-oil/water separator. Separators work as either inertial, coalescing, condensating or a combination of the three. If the can comes apart you can tell which principle it uses. Btw, stuffing it with some plastic scrubbing pads or similar material will make it more efficient as long as you don't choke the flow. The added material increases the surface area and aids in coalescence.