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 Post subject: Breathers
PostPosted: Sun Oct 31, 2004 8:26 pm 
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can some explain Breathers to me and why these add performance.

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PostPosted: Mon Nov 08, 2004 11:37 pm 
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Anyone?

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PostPosted: Mon Nov 08, 2004 11:41 pm 
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They dont add performance. Pretty much jus stop blowby or whatnot from gettin into your intake mani.

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 Post subject:
PostPosted: Mon Nov 08, 2004 11:51 pm 
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do they cause damage to anything or change emmisions at all?

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PostPosted: Tue Nov 09, 2004 12:03 am 
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I wouldnt see how. So no.

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PostPosted: Tue Nov 09, 2004 12:24 am 
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92Metrosedan wrote:
do they cause damage to anything or change emmisions at all?

I couldn't pass emission test till I took breather filter off and put the stock rubber hose on. The car was getting readings .01 higher than the limit, when I changed to the hose, reading dropped like .08 under the limit. That was the only thing different I did between the failing test and passing test. I honestly don't see how breather filter could screw up emission test but I guess that's what happened in my case.

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 Post subject:
PostPosted: Tue Nov 09, 2004 4:30 am 
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performance:
blowback (= oil vapours mixed with exhaust gasses) effectively reduces your octane rating and reduces the amount of air volume

In Australia its illegal to vent the crankcase gasses to atmosphere. Its a defectable offence.

I have no explanation on how it would improve your emissions.... no explanation at all.


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PostPosted: Tue Nov 09, 2004 3:35 pm 
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tekkie gti wrote:
I have no explanation on how it would improve your emissions.... no explanation at all.


The way that the breather tube helps with your emissions is that it recirculates unburnt HC (hydrocarbon) gasses back to the intake. These gasses usually leak through the valve seals and past the piston rings into the crankcase from the cylinders.


Chris

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 Post subject:
PostPosted: Tue Nov 09, 2004 5:08 pm 
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Chris,

I understand the concept of why....
but how would that improve your exhaust emissions as qwall mentioned ?


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PostPosted: Tue Nov 09, 2004 5:19 pm 
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tekkie gti wrote:
Chris,

I understand the concept of why....
but how would that improve your exhaust emissions as qwall mentioned ?


That's a good question. I assume that the vacuum from the intake would pull these gasses from the valve cover, rather than have them make their way out of the exhaust... the theory made all sorts of sense while I was at work today, but now it seems to be lacking something. :roll:


Chris

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 Post subject:
PostPosted: Tue Nov 09, 2004 11:02 pm 
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so when people put breathers on do they plug the pcv system?

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PostPosted: Tue Nov 09, 2004 11:12 pm 
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Well, I for one just make sure that my PCV valve is working, and I leave everything hooked up the way it's supposed to be. Which reminds me. I need a new PCV valve. :roll:


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 Post subject:
PostPosted: Tue Nov 09, 2004 11:24 pm 
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92Metrosedan wrote:
so when people put breathers on do they plug the pcv system?


On your engine - yes - otherwise you'll be sucking fresh air in through the PCV and leaning out the mixture.


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 Post subject:
PostPosted: Thu Nov 11, 2004 7:19 pm 
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Ok I put one of those chrome oil breather caps on my car and left the pcv system all stock. The car would rev up and down like crazy when you came to a stop at a light or anywhere else. so i thought maybe if i pluged all the PCV system it would slove the problem but it made it much worse the engine would rev really high and then drop low repedativly, then i noticed that white smoke was pouring from the exhaust pipe. so i put it back to stock and the car runs fine so im not to sure why i experienced these things. can anyane explain why this happened

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 Post subject:
PostPosted: Fri Nov 12, 2004 7:46 pm 
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i had the same thing happen with my neon when i was trying to ditch my egr *long story*. its definately intake related, probably a vaccume tube somewhere that connects to the tb or below causing it to rev higher to pull in more air to get a certain ammount of pressure in the intake, once it gets to its normal pressure the computer says "okay" and the rpm's drop to normal idle... which inturn will drop the pressure inwhich case the computer says "holy crap batman" and then ups the rpm's again and so the cycle goes on. I THINK this is what is going on, the computer may have nothing to do with it, it may be mechanical but i am pretty sure that this is the effect you are getting
You may have went a little too cap crazy :screwball:

Qwall, what all did you change with your breather setup?? you didn't run into this problem did you?


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 Post subject:
PostPosted: Sun Nov 14, 2004 11:14 pm 
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I just put a breather on my car a couple days ago when I made my custom intake. It didnt effect the ifle at all. IO would suggest that there is a vacuum leak somewhere if your idle is doing that.

I am looking at pulling my carbon canister out of the car next. But that sometimes has very ill effects.

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 Post subject:
PostPosted: Sun Nov 14, 2004 11:50 pm 
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i have breather filters on my valve cover, the only bad thing, is, when ur sitting you start to smell oil fumes and that can make your car small like a mechanic shop, and over time oil starts dripping from the filter. as to performance gains i've had a friend tell me that he can feel his car pull harder in higher rpms

im sure it helps ur car breath better thats for sure.

stock scenerio : oxygen+fuel+oil fumes=dirty intake valves and manifold

breathers scenerio: oxygen+fuel=clean solid combustion

if my view of things is wrong or false please feel free to correct me or express your feelings

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 Post subject:
PostPosted: Fri Apr 01, 2005 10:21 pm 
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i have a breather on my car and yeas i get those mechanic shop fumes as well. as far as oil coming out of them i found somewhat of a good solution to deal with it since i got mine.

take 1 METAL screen filter like you would find in you sink that makes the water come out nice and bend that over the outlet tube the breather slips onto. VERY IMPORTANT----you must secure this to the tube via welding/high temp soldering/whatever so that it doesnt fall into your camshaft and start tearing things apart.

this little screen will help reduce the amount(very well for me anyways) of oil that comes from the cam cover.

pm me if you have any questions


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 Post subject:
PostPosted: Sat Apr 02, 2005 10:48 am 
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an oil catch can would work well as well. Just run a tub off that line and put a coke bottle or something down low. The oil will come out and collect in the can. Then you can dispose of it at an environmental site, or drop it right back into the engine.

My breather filter was sooo filthy after only 5 months that you couldnt even tell what color it was anymore. Plus the valve cover was getting covered in oil.

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 Post subject:
PostPosted: Sat Apr 02, 2005 11:47 am 
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The crankcase needs some kind of vacuum to it (or at least efective breathing). The Swift has two measly breather holes going through it and does not provide enough ventilation for any kind of serious mods (Supra has 8, lots of other turbo motors have 5-6). I know lots of turbo guys, including myself, that ran a breather and just dealt with the oil spray and such problems... but I'm working on a different solution that I'll post up about when I test it.

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 Post subject:
PostPosted: Sat Apr 02, 2005 11:58 pm 
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well im driving a 1.0 for some reason our cars, or mine anyways gives off a shit load of smelly fumes. i am considering adding more vents holes to the cover or making a tubeing sytem with an oil catch at the beginning that leads somewhere out of the car


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 Post subject:
PostPosted: Tue Apr 05, 2005 8:06 pm 
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When I had a breather on my crankcase, I was collecting lots of white goo, mixed in with the outcoming oil. I had heard that this white goo in the oil was water. Can anyone confirm this? I have no idea how water would get in there. Everything is sealed up nice and tight.
It was quite constant.


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 Post subject:
PostPosted: Tue Apr 05, 2005 9:10 pm 
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jonathan180iq wrote:
When I had a breather on my crankcase, I was collecting lots of white goo, mixed in with the outcoming oil. I had heard that this white goo in the oil was water. Can anyone confirm this? I have no idea how water would get in there. Everything is sealed up nice and tight.
It was quite constant.


just moisture. if you drive short trips or have a bad pcv, it happens.
that is unless when you check your oil it also is gooey white.

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 Post subject:
PostPosted: Wed Apr 06, 2005 7:22 pm 
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Thanks for that confirmation.

Cheers,
Jonathan


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 Post subject:
PostPosted: Thu Apr 28, 2005 2:08 pm 
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Well on my turbo Gti I blocked off the valve cover to inlet pipe and had a oil catch can instead, my car smoked alot like this, so now I have the oil catch can still and the vacume pipe to the inlet, I thought this would work well because when your sitting there it can suck the fumes out the engine, and when your boosting the oil can't go into the inlet because of the pressure in the inlet. I still think its a good idea but now my car keeps dying when its cold.

whats a pcv?

Thanks
Steve


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