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| breather filters https://www.thejdm.com/forum/viewtopic.php?f=17&t=1144 |
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| Author: | Nikku [ January 09, 2004 ] |
| Post subject: | breather filters |
"Yes they are. Read further for why. "Here's the stock PCV diagram from the Helms manual. On the left is a cutaway view of the engine. On the right is a cutaway view of the stock intake. In the middle are the separate breather circuit and the PCV valve circuit: all you have to learn is how the fresh air cicuit flows (follow the open white arrow) and how the crankcase vapor (with oil vapors in it ) circuit flows (follow the black arrows). Notice which circuit flows to the valve cover (on top of the engine on the left)....it's NOT the crankcase vapors. When you add a breather, you remove the line from the intake to the valve cover. The honda crankcase breather is a POSITIVE pressure ventilation system.The air from the intake blows into the valve cover. It is NOT a negative pressure ventilation system...it does NOT suck air from the valvecover to the intake. Breathers remove the source of positive ventilation that repressurizes the POSTIVE CRANKCASE VENTILATION (PCV) valve. There is less pressure in the crank when you add a breather at the valve cover. The consequence of this is you get more positive blow-by from the combustion chamber past the piston rings and into the crankcase. More blow-by means less cylinder pressure...less cylinder pressure means the burn is slower and less complete...the result is more emissions and less power. If you want to do this right and remove oil vapor from the circulating crankcase before it goes into the intake valve then, get an oilcatch can and put a breather on the catch can. Then place the catch can in between the valve cover breather and the PCV valve. Disconnecting the breather tube, which blows fresh intake air into the valve cover, and placing a breather on the valve cover just creates more blow-by and emissions. Eventually you have so much blow-by, you lose power. " the pic does not work for the diagram |
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| Author: | kyle [ January 10, 2004 ] |
| Post subject: | |
breather filter=bad. it doesn't matter if your riceboy buddy tells you it looks cool. just stick witha pieces of hose runing between the two. it is safest. |
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| Author: | Nikku [ January 10, 2004 ] |
| Post subject: | |
exactly, i am hoping to dispel what people think about them by posting this, it came from team integra (i think) i have the link at work and will post the link on monday |
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| Author: | BRYCE [ January 21, 2004 ] |
| Post subject: | |
Coo... but they sure do look cool :eyerolls: |
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| Author: | Nikku [ January 21, 2004 ] |
| Post subject: | |
word.....LOL |
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| Author: | kotomile [ January 22, 2004 ] |
| Post subject: | |
Yay, now I have data to show someone instead of telling them "it's bad for your motor." |
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| Author: | BRYCE [ January 22, 2004 ] |
| Post subject: | |
"I would say it looks cool wanna race?" |
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