K&N Breather kit

theKnifeArtist

theKnifeArtist

Fire on High!
Apr 6, 2006
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North Jersey
so this K&N Breather kit, is that just those little filters that go on the pcv ports on the valve covers? i know someone on here is gonna tell me not to use it..please inform me, i dont know what the drawbacks are of this system. if it's just legal issues, i'm all for it, hehe
or should i just get a catch can, which ones are you guys usin?
thanks
http://www.supramania.com/forums/showthread.php?t=4594
 
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CRE

CRE

7M-GE + MAFT Pro + T = :D
Oct 24, 2005
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Denver, CO
Get a catch can if you're worried about keeping oil out of the intake. Breathers are the Debil. Maintaining vacuum in the crank case is even more important in an older engine. The greatest benefit as far as I know is that it helps the rings seal better. Wouldn't you rather your compressed air and fuel stay in the cylinder?
 
CRE

CRE

7M-GE + MAFT Pro + T = :D
Oct 24, 2005
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Denver, CO
They look like they'll be fine for catching the majority of oil and condensation.

I've been trying out numerous methods of filtering the air draw into the intake. So far the absolute best method is by running the incoming air through a hose which continues to the bottom of the can, then about 1/4 of a cup of distilled water. It shocks the incoming air and pretty much nothing makes it back into the intake. I've been blown away by how much it captures.
 
jetjock

jetjock

creepy-ass cracka
Jul 11, 2005
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Redacted per Title 18 USC Section 798
First Supra I've heard of with a built in bong ;)

Try stuffing the can with stainless steel wool or plastic kitchen scrubs. That'll give you two types of separation. The first will be inertial or "torturous path" separation ie; the air can make the twist and turns through the wool but the oil droplets can't because of their mass. It's does the same as baffling but better. The second is coalescing ie; the wool helps not only to condense the vapor but also collect it into bigger drops. Best of both worlds.
 
CRE

CRE

7M-GE + MAFT Pro + T = :D
Oct 24, 2005
3,485
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Hehe, yup a lot like a bong. :evil2:

I've tried steel wool and poly filler (kind of like fake cotton)... still nowhere near as easy to replace as water. Granted while the water does evaporate, it lasts over a month and I empty the can more often than that. I've also tried an oil filter, too restrictive after a couple hours of use. A couple different types of air filters (again, they load up too quickly).

The downside to trying to filter out the most material is that no matter what medium you use the resistance increases the more it collects. Distilled water is cheap and the easiest thing to keep switching out.
 
jetjock

jetjock

creepy-ass cracka
Jul 11, 2005
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Redacted per Title 18 USC Section 798
Yeah, filters are going to load up quickly. The wool should drain to the bottom of the can though. Funny, I've never used a can because I get very little oil in the intake. Maybe you have too much blowby. Have you measured it with a manometer?
 
jetjock

jetjock

creepy-ass cracka
Jul 11, 2005
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Redacted per Title 18 USC Section 798
CRE said:
I haven't measured the blowby yet. It's only obvious in the winter.
Click to expand...

That's odd. Anyway, with a stock PCV system and a healthy engine you shouldn't see more that +.2 inches of water in the valve covers. Usually it'll be zero. Same in the crankcase. I hope you have that catch can hooked up properly. I see a lot of them plumbed only to the accordion. That's bad. It works but the "positive" in PCV is lost. Doing it that way is no better than a draft tube.
 
CRE

CRE

7M-GE + MAFT Pro + T = :D
Oct 24, 2005
3,485
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Denver, CO
I'm N/A, it's routed back to the TB.

I see water, oil and some gas. The gas is really only evident during cold weather... but I am planning on replacing the rings and possibly getting the block honed within the next year or so. I'm also running pretty rich, so I suspect the CSI is dumping in too much extra fuel. The last compression test I ran, a few months ago, was great. Every cyl was within 2psi of 156 (+1/-1). I should do another though, I cleaned the combustion chambers thoroughly and may have removed some deposits that were filling in weak areas.
 
jetjock

jetjock

creepy-ass cracka
Jul 11, 2005
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Redacted per Title 18 USC Section 798
Sorry, keep forgetting you're N/A. That's the way it should be plumbed. The turbo guys often block the TB line and run the can only to the accordion. Lol, they're apparently operating under a misconception there's vacuum on that line.

The water you're seeing in winter is condensation from blowby. No big deal. Someday when you get the chance measure the valve covers and crankcase. Use the dipstick tube or port into the covers. I use an oil cap with a fitting that makes the job easy but the dipstick tube works as well.

Oh and good luck with the alternator ;)
 
A

A-model_

New Member
Jun 7, 2006
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TX
Just to add to this thread. Does anybody know the name of the valves that go on the exhaust. They pull vaccum off the downward exhaust pressure? Domestic guys use these, I dont know the name of them. SF had a thread awhile ago about them, but search dont work. BTW these are for racing purposes ony ;) .
 
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